Foldable electronic device

Abstract

Provided in the present application is a foldable electronic device. The foldable electronic device comprises an antenna. The operating frequency band of the antenna comprises a satellite communication frequency band. A radiating body of the antenna comprises an electrically conductive portion of a frame of a first housing, and a parasitic stub of the antenna comprises an electrically conductive portion of a frame of a second housing. The antenna is capable of generating directional patterns with different beam-pointing orientations, thereby improving user experience during satellite communication.

Description

A foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 4, 2024, with application number 202410169275.1 and application name “A Foldable Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of wireless communications, and in particular to a foldable electronic device. Background Art

[0003] Currently, existing terminal electronic devices use the frame as an antenna radiator. For example, in satellite communication systems, frame radiators are primarily used to form linearly polarized antennas. When using satellite communication, users need to point the antenna's area with good radiation characteristics (for example, the antenna's gain within this area is greater than or equal to AdBic, where A is the minimum gain required to meet communication requirements in the satellite communication system) toward the satellite to achieve satellite alignment (establishing a communication connection with the satellite).

[0004] However, during satellite communications, the relative position of the electronic device and the satellite changes. For example, if a low-orbit satellite moves, the satellite may move beyond the antenna's optimal radiation area. In this case, the user needs to adjust their grip or move the device to keep the satellite within the antenna's optimal radiation area to maintain tracking or establish a connection with a new satellite. Failure to do so can result in poor communication quality or even disconnection, significantly impacting the user's communication experience. Summary of the Invention

[0005] The present application provides a foldable electronic device including an antenna. The antenna operates in a frequency band that includes a satellite communication frequency band. The antenna can generate different beam patterns, thereby enhancing a user's experience during satellite communication.

[0006] In a first aspect, a foldable electronic device is provided, comprising: a floor; a first shell and a second shell, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame comprises a first position and a second position, the second frame comprises a third position and a fourth position, the first frame is coupled to the floor or has an insulating gap at the first position, the first frame is coupled to the floor or has an insulating gap at the second position, the second frame is coupled to the floor or has an insulating gap at the third position, and the second frame is coupled to the floor or has an insulating gap at the fourth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and a first antenna, the first antenna comprising: a first radiator and a first parasitic branch, the first radiator comprises a conductive portion of the first frame between the first position and the second position, the first parasitic branch comprises a conductive portion of the second frame between the third position and the fourth position, at least a portion of the first radiator is connected to the floor The foldable electronic device is provided with a board spacing arrangement, at least a portion of the first parasitic branch is spaced from the floor; and a first feeding circuit, the first radiator includes a first feeding point, the first feeding circuit is coupled to the first feeding point; a first switch, the first parasitic branch includes a first connection point, the first switch is coupled to the first connection point; wherein the second position is closer to the first rotation axis than the first position in the first direction, the third position is closer to the first rotation axis than the fourth position in the first direction, and the first direction is perpendicular to the extension direction of the first rotation axis; when the foldable electronic device is in the unfolded state, the first switch is used to switch the first directional pattern and the second directional pattern generated by the antenna, the beam direction of the first directional pattern and the beam direction of the second directional pattern being different; when the first antenna generates the first directional pattern and the second directional pattern, the operating frequency band of the first antenna covers the transmitting frequency band of at least one satellite communication frequency band; or when the first antenna generates the first directional pattern and the second directional pattern, the operating frequency band of the first antenna covers the receiving frequency band of the at least one satellite communication frequency band.

[0007] According to an embodiment of the present application, the first switch can adjust the beam direction of the directional pattern generated by the first antenna in different switch states. The first antenna can switch between the first directional pattern and the second directional pattern generated by the first antenna based on the relative position of the communication satellite and the foldable electronic device, ensuring that the communication satellite is always located in an area where the first antenna has good radiation characteristics, thereby maintaining a satellite alignment state with the communication satellite, effectively improving the user experience.

[0008] The switch state can be understood as the electrical connection state of all switches associated with the first antenna in the foldable electronic device. The electrical connection state of the switch related to the first antenna 200 can be understood as that when the common port of the switch is electrically connected to different connection ports (different connection ports are connected to different switch branches), the radiation characteristics of the first antenna (for example, the resonant point frequency, the maximum radiation direction of the directional pattern, the radiation efficiency, etc.) will change.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the angle between the second direction and the third direction is greater than or equal to 10° and less than or equal to 90°, the second direction is the maximum radiation direction of the first direction pattern, and the third direction is the maximum radiation direction of the second direction pattern.

[0010] According to an embodiment of the present application, when the maximum radiation direction of the first radiation pattern and the maximum radiation direction of the second radiation pattern are offset toward both sides of the top direction (there is a larger angle between the second direction and the third direction), the width of the radiation beam of the first antenna can be further widened, so that the first antenna has good communication characteristics within a wider angle range (the angle with the top direction).

[0011] For simplicity of discussion, in the application embodiments, only the first switch state and the second switch state are used as examples for illustration. In actual production or application, multiple switch states (greater than or equal to three switch states) may be included. When multiple switch states (greater than or equal to three switch states) are included, the angle between the second direction and the third direction is greater than or equal to 10° and less than or equal to 90°. This can be understood as the angle between the maximum radiation directions of the directional pattern generated by the first antenna 200 corresponding to any two switch states in the multiple switch states is greater than or equal to 10° and less than or equal to 90°.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first frame includes a first side and a second side intersecting at an angle, the second position is located on the first side, the second position is located on the first side or the second side, and / or the second frame includes a third side and a fourth side intersecting at an angle, the third position is located on the third side, and the fourth position is located on the third side or the fourth side; based on the foldable electronic device being in an unfolded state, the first side and the third side are collinearly arranged and distributed on both sides of the first rotating axis.

[0013] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in an unfolded state, the first side and the third side are the top side or the bottom side of the foldable electronic device.

[0014] According to an embodiment of the present application, the first radiator and the first parasitic branch are at least partially located on the top edge of the foldable electronic device. In this way, when a user uses satellite communication, he or she can directly align the satellite using the usual usage state of the foldable electronic device, which is conducive to simplifying user operations and making it easier to align the first antenna with the communication satellite.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the first frame defines a first insulating gap at the first position, and the first frame is coupled to the floor at the second position.

[0016] According to an embodiment of the present application, one end of the first radiator is a ground end and the other end is an open end, which can form a structure similar to an IFA. The first radiator can operate in a quarter-wavelength mode.

[0017] In combination with the first aspect, in some implementations of the first aspect, the first antenna also includes a first electronic element; wherein, the first radiator includes a second connection point and a third connection point, the first electronic element is coupled and connected between the second connection point and the third connection point, and the first radiator opens a second insulating gap between the second connection point and the third connection point.

[0018] According to an embodiment of the present application, the first radiator forms a metamaterial structure. This metamaterial structure can increase the radiation aperture of the first radiator, and the second insulating gap can further disperse the electric field. In one embodiment, dielectric loss near the first radiator formed with the metamaterial structure is reduced, thereby effectively improving the system efficiency and radiation efficiency of the first antenna.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the distance between the second connection point and the second insulating gap is less than or equal to 5 mm, and / or the distance between the third connection point and the second insulating gap is less than or equal to 5 mm.

[0020] According to an embodiment of the present application, when the distance between the second connection point / the third connection point and the second insulating gap is within the above range, it is convenient to adjust the equivalent capacitance of the second insulating gap, thereby adjusting the radiation characteristics of the first radiator.

[0021] In combination with the first aspect, in certain implementations of the first aspect, a distance between the second position and the center of the first rotation axis in the first direction is less than or equal to 20 mm.

[0022] According to an embodiment of the present application, when the second position is close to the first rotation axis, the coupling between the first radiator and the first parasitic branch can be increased, thereby better exciting the first parasitic branch.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the first frame defines a first insulating gap and a third insulating gap at the first position and the second position.

[0024] According to an embodiment of the present application, both ends of the first radiator are open ends, forming an antenna structure similar to a dipole, and the first radiator operates in a half-wavelength mode.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the first frame further includes a fifth position, the fifth position being closer to the first rotation axis than the second position in the first direction, and the first frame is coupled to the floor at the fifth position; the first antenna further includes a second parasitic branch, the second parasitic branch including a conductive portion of the first frame between the second position and the fifth position, and at least a portion of the second parasitic branch is spaced apart from the floor.

[0026] According to the embodiment of the present application, the parasitic resonance generated by the second parasitic branch can be close to the resonance generated by the first radiator, so as to improve the radiation characteristics (eg, bandwidth, radiation efficiency, etc.) of the first antenna.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the second frame has a fourth insulating gap at the fourth position, and the second frame is coupled to the floor at the third position; wherein the first switch is coupled between the first connection point and the floor.

[0028] According to an embodiment of the present application, one end of the first parasitic branch is a ground end and the other end is an open end, so as to form a structure similar to an IFA. The first parasitic branch can operate in a quarter-wavelength mode.

[0029] In combination with the first aspect, in certain implementations of the first aspect, the second frame defines a fourth insulating gap at the fourth position, and the second frame is coupled to the floor at the third position; wherein the first parasitic branch includes a fourth connection point, and the first parasitic branch defines a fifth insulating gap between the first connection point and the fourth connection point; and the first switch is coupled and connected between the first connection point and the fourth connection point.

[0030] According to an embodiment of the present application, the first parasitic branch forms a metamaterial (metamaterial, meta) structure. The first parasitic branch having the metamaterial structure can increase the radiation aperture, and the electric field is more dispersed after the fifth insulating gap is opened. In one embodiment, the dielectric loss near the first parasitic branch forming the metamaterial structure is reduced, so the system efficiency and radiation efficiency of the first antenna can be effectively improved. By coupling the first switch connected between the first connection point and the fourth connection point (switching the switch branch coupled between the first connection point and the fourth connection point), the equivalent capacitance value of the fifth insulating gap can be adjusted, thereby adjusting the radiation characteristics of the first antenna (for example, the resonance point frequency of the first parasitic resonance generated by the first parasitic branch).

[0031] In combination with the first aspect, in certain implementations of the first aspect, the distance between the first connection point and the fifth insulating gap is less than or equal to 5 mm, and / or the distance between the fourth connection point and the fifth insulating gap is less than or equal to 5 mm.

[0032] According to the embodiment of the present application, when the distance between the first connection point / the fourth connection point and the fifth insulating gap is within the above range, it is convenient to adjust the equivalent capacitance of the fifth insulating gap, thereby adjusting the radiation characteristics of the first parasitic stub.

[0033] In combination with the first aspect, in certain implementations of the first aspect, a distance between the third position and the center of the first rotation axis in the first direction is less than or equal to 20 mm.

[0034] According to an embodiment of the present application, when the third position is close to the first rotation axis, the coupling between the first radiator and the first parasitic branch can be increased, thereby better exciting the first parasitic branch.

[0035] In combination with the first aspect, in certain implementations of the first aspect, when the foldable electronic device is in an unfolded state and the first switch is in a first switching state, the first radiator and the first parasitic branch are used to generate the first radiation pattern; when the foldable electronic device is in an unfolded state and the first switch is in a second switching state, the first radiator and the first parasitic branch are used to generate the second radiation pattern.

[0036] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device is in an unfolded state, and the first switch is in a first switching state, and the first radiator is used to generate a first resonance; the foldable electronic device is in an unfolded state, and the first switch is in a second switching state, and the first radiator is used to generate a second resonance, and the resonant frequency band of the first resonance and the resonant frequency band of the second resonance include the transmitting frequency band; or the resonant frequency band of the first resonance and the resonant frequency band of the second resonance include the receiving frequency band.

[0037] In combination with the first aspect, in some implementations of the first aspect, when the foldable electronic device is in the unfolded state and the first switch is in the first switching state, the first radiator is used to generate a first main resonance, the first parasitic branch is used to generate a first parasitic resonance, the first parasitic resonance is located within the resonant frequency band of the first main resonance, and the first main resonance and the first parasitic resonance together form the first resonance; when the foldable electronic device is in the unfolded state and the first switch is in the second switching state, the first radiator is used to generate a second main resonance, the first parasitic branch is used to generate a second parasitic resonance, the second parasitic resonance is located within the resonant frequency band of the second main resonance, and the second main resonance and the second parasitic resonance together form the second resonance.

[0038] In combination with the first aspect, in some implementations of the first aspect, the resonance point frequency of the first parasitic resonance is higher than the resonance point frequency of the first main resonance, and the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is greater than or equal to 50 MHz and less than or equal to 250 MHz; the resonance point frequency of the second parasitic resonance is lower than the resonance point frequency of the second main resonance, and the frequency difference between the resonance point frequency of the second main resonance and the resonance point frequency of the second parasitic resonance is greater than or equal to 50 MHz and less than or equal to 250 MHz.

[0039] In combination with the first aspect, in certain implementations of the first aspect, when the foldable electronic device is in the unfolded state and the first switch is in the first switching state, the antenna generates a first efficiency pit at a first frequency point, the frequency of the first frequency point is higher than the resonant point frequency of the first resonance, and the frequency difference between the resonant point frequency of the first resonance and the first frequency point frequency is greater than or equal to 50 MHz and less than or equal to 250 MHz; when the foldable electronic device is in the unfolded state and the first switch is in the second switching state, the antenna generates a second efficiency pit at a second frequency point, the frequency of the second frequency point is lower than the resonant point frequency of the second resonance, and the frequency difference between the resonant point frequency of the second resonance and the second frequency point frequency is greater than or equal to 50 MHz and less than or equal to 250 MHz.

[0040] In one embodiment, in the first switching state (the first switching branch is coupled to the first connection point), the resonance point of the first parasitic resonance is within the resonance frequency band of the first main resonance. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0041] According to an embodiment of the present application, when the resonant frequency of the first parasitic resonance is lower than the resonant frequency of the first resonance, no electric field is excited near the first parasitic branch, and the electric field excited by the first radiator is dominant. When the foldable electronic device is unfolded, the beam pattern generated by the antenna points toward the first parasitic branch.

[0042] At the same time, in an embodiment of the present application, the coupling between the first radiator and the first parasitic branch is weak, and the first parasitic resonance cannot be well excited. Therefore, the pit corresponding to the first parasitic resonance does not appear clearly in the S-parameter diagram. However, since the first parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the first frequency point, the first frequency point can be considered to correspond to the resonance point of the above-mentioned first parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0043] In one embodiment, in the second switching state (the second switching branch is coupled to the first connection point), the resonance point of the second parasitic resonance is within the resonance frequency band of the second main resonance. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0044] According to an embodiment of the present application, when the resonant frequency of the second parasitic resonance is lower than the resonant frequency of the second resonance, no electric field is excited near the first parasitic branch, and the electric field excited by the first radiator is dominant. When the foldable electronic device is unfolded, the beam of the second directional pattern generated by the antenna is directed toward the first parasitic branch.

[0045] At the same time, in an embodiment of the present application, the coupling between the first radiator and the first parasitic branch is weak, and the second parasitic resonance cannot be well excited. Therefore, the pit corresponding to the second parasitic resonance does not appear clearly in the S-parameter diagram. However, since the second parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the second frequency point, the second frequency point can be considered to correspond to the resonance point of the above-mentioned second parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0046] In combination with the first aspect, in certain implementations of the first aspect, when the foldable electronic device is in an unfolded state and the first switch is in a first switching state, the first radiator and the first parasitic branch are used to generate the first radiation pattern, and the gain of the first area in the first radiation pattern is greater than or equal to a first threshold value; when the foldable electronic device is in an unfolded state and the first switch is in a second switching state, the first radiator and the first parasitic branch are used to generate the second radiation pattern, and the gain of the second area in the second radiation pattern is greater than or equal to the first threshold value; wherein, the first area and the second area are combined into a third area, and the area S1 of the first area, the area S2 of the second area, and the area S3 of the third area satisfy: S3 ≥ S1 × 130%, and S3 ≥ S2 × 130%.

[0047] According to an embodiment of the present application, the first antenna can adjust the directional pattern generated by the first antenna by switching different switch states, so that the foldable electronic device has good communication characteristics within a range of a larger angle (for example, 45°, 50°, 60°, or 70°) with the top direction (the direction from the bottom of the foldable electronic device 100 to the top, for example, the z direction) (for example, Theta (θ) in the third area is greater than 45°, 50°, 60°, or 70°). For example, when the user conducts satellite communication, the directional pattern generated by the first antenna 200 has good characteristics within a larger angle, and the communication satellite can move within a larger angle range without affecting the quality of satellite communication. The user does not need to frequently change the posture of holding the foldable electronic device, which effectively improves the user experience.

[0048] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device may further include a third shell and a second rotation shaft; the second rotation shaft is located between the second shell and the third shell, and the second rotation shaft is rotatably connected to the second shell and the third shell respectively.

[0049] According to an embodiment of the present application, the second shell may be located between the first shell and the third shell.

[0050] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device may further include a third shell and a second rotation shaft; the second rotation shaft is located between the first shell and the third shell, and the second rotation shaft is rotatably connected to the first shell and the third shell respectively.

[0051] According to an embodiment of the present application, the first shell may be located between the second shell and the third shell.

[0052] In combination with the first aspect, in certain implementations of the first aspect, the third shell includes a third frame, the third frame includes a sixth position and a seventh position, the sixth position being closer to the second rotation axis in the first direction than the seventh position; the first frame includes a first side, the second frame includes a third side and a fourth side intersecting at an angle, the third frame includes a fifth side and a sixth side intersecting at an angle, the first position and the second position are located on the first side, the third position is located on the third side, the fourth position is located on the third side or the fourth side, the sixth position is located on the fifth side, and the seventh position is located on the fifth side or the sixth side, the third frame is coupled to the floor or has an insulating gap at the sixth position, and is coupled to the floor or has an insulating gap at the seventh position; based on the foldable electronic device being in an unfolded state, the first side, the third side, and the fifth side are collinearly arranged and distributed on both sides of the first rotation axis and the second rotation axis; the antenna further includes a third parasitic branch, the third parasitic branch including a conductive portion of the third frame between the sixth position and the seventh position.

[0053] According to an embodiment of the present application, the first antenna may further include a conductive portion of a third frame as a third parasitic branch to improve the radiation characteristics of the first antenna.

[0054] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in an unfolded state, the first side, the third side, and the fifth side are the top side or the bottom side of the foldable electronic device.

[0055] According to an embodiment of the present application, the first radiator, the first parasitic branch, and the third parasitic branch are at least partially located on the top edge of the foldable electronic device. In this way, when a user uses satellite communication, he or she can directly align the satellite using the foldable electronic device in the usual usage state, which is conducive to simplifying user operations and making it easier to align the first antenna with the communication satellite.

[0056] In combination with the first aspect, in certain implementations of the first aspect, when the foldable electronic device is in an unfolded state and the first switch is in a first switching state, the first radiator is used to generate a first resonance; when the foldable electronic device is in an unfolded state and the first switch is in a second switching state, the first radiator is used to generate a second resonance; at the resonance point of the first resonance or the resonance point of the second resonance, the current on the first radiator and the current on the third parasitic branch are in the same direction.

[0057] According to an embodiment of the present application, the current generated on the first radiator and the current generated on the third parasitic branch are in the same direction. The current generated on the first radiator and the current generated on the third parasitic branch are in the same direction, which can form an effect similar to a current array, so that the first antenna has a stronger linear polarization characteristic. The first antenna has a higher directivity coefficient, which can improve the radiation characteristics of the first antenna (for example, gain).

[0058] In combination with the first aspect, in some implementations of the first aspect, when the foldable electronic device is in the unfolded state and the first switch is in the first switching state, the first radiator is used to generate a first resonance; when the foldable electronic device is in the unfolded state and the first switch is in the second switching state, the first radiator is used to generate a second resonance; the third parasitic branch is used to generate a third parasitic resonance, the resonance point frequency of the third parasitic resonance is lower than the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance, and the frequency difference between the resonance point frequency of the third parasitic resonance and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is less than or equal to 100 MHz.

[0059] In combination with the first aspect, in some implementations of the first aspect, the third frame also includes an eighth position, the sixth position is located between the seventh position and the eighth position, the third frame opens a sixth insulating gap at the sixth position, the third frame is coupled to the floor or opens an insulating gap at the seventh position, and is coupled to the floor or opens an insulating gap at the eighth position; the foldable electronic device also includes a second antenna, the second antenna includes a second radiator and a second feeding circuit, the second radiator includes a conductive part of the third frame between the sixth position and the eighth position, at least part of the second radiator is spaced apart from the floor, the second radiator includes a second feeding point, the second feeding circuit is coupled to the second feeding point, and the operating frequency band of the second antenna includes a non-satellite communication frequency band.

[0060] In combination with the first aspect, in certain implementations of the first aspect, when the foldable electronic device is in an unfolded state and the first switch is in a first switch state or a second switch state, the first radiator is used to generate a first resonance or a second resonance, and the second radiator is used to generate a third resonance; wherein the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is greater than or equal to 400 MHz.

[0061] According to an embodiment of the present application, since the first antenna operates in a satellite communication frequency band (e.g., a transmission frequency band), the power of the radio frequency signal fed into the first antenna when it is operating is relatively large, and the high-power electrical signal is injected into the second feeding circuit of the second antenna, which will damage the electronic components in the second feeding circuit. A switch can be coupled between the second feeding circuit and the second feeding point. When the first antenna is operating, the switch can disconnect the second feeding circuit and the second feeding point (or couple the feeding point to the floor), so that the high-power radio frequency signal will not flow into the second feeding circuit, thereby avoiding damage to the electronic components. However, since a switch is provided between the second feeding circuit and the second feeding point, the power of the radio frequency signal fed into the second feeding point by the second feeding circuit will be lost, resulting in a decrease in the radiation performance of the second antenna. Therefore, when the frequency difference between the resonant point frequency of the third resonance and the resonant point frequency of the resonance of the first radiator (e.g., the first resonance, the second resonance) is within the above range, the isolation between the first antenna and the second antenna is good, and the high-power radio frequency signal will not flow into the second feeding circuit, thereby avoiding damage to the electronic components. Furthermore, no switch is provided between the second feeding circuit and the feeding point, so that the power of the radio frequency signal fed into the feeding point by the second feeding circuit will not be lost.

[0062] In combination with the first aspect, in certain implementations of the first aspect, the third frame is coupled to the floor at the sixth position, and the third frame opens a seventh insulating gap at the seventh position; wherein the third parasitic branch includes a fifth connection point and a sixth connection point, and the third parasitic branch opens an eighth insulating gap between the fifth connection point and the sixth connection point; and the second switch is coupled and connected between the fifth connection point and the sixth connection point.

[0063] According to an embodiment of the present application, the third parasitic branch can be used to make the difference between the first radiation pattern and the second radiation pattern generated by the antenna greater (for example, the angle between the maximum radiation directions increases, for example, the angle between the second direction and the third direction is greater than or equal to 15°), which can further widen the width of the radiation beam of the first antenna, so that the first antenna has good communication characteristics within a wider angle range (angle with the top direction).

[0064] In combination with the first aspect, in certain implementations of the first aspect, when the first antenna generates the first radiation pattern and the second radiation pattern, the operating frequency band of the first antenna covers at least part of the frequency band from 1.5 GHz to 4.5 GHz.

[0065] In combination with the first aspect, in certain implementations of the first aspect, when the first antenna generates the first radiation pattern and the second radiation pattern, the first feeding circuit is used to transmit the radio frequency signal of the transmission frequency band and the radio frequency signal of the reception frequency band.

[0066] In combination with the first aspect, in certain implementations of the first aspect, based on the foldable electronic device being in an unfolded state, an angle between the first shell and the second shell is greater than or equal to 60° and less than or equal to 300°.

[0067] In combination with the first aspect, in some implementations of the first aspect, the foldable electronic device being in the unfolded state means that the foldable electronic device 100 is in the flattened state. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] FIG1 is a schematic diagram of an electronic device 100 provided in an embodiment of the present application.

[0069] FIG2 is a schematic structural diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0070] FIG3 is a schematic structural diagram of the foldable electronic device 100 in an outwardly folded state.

[0071] FIG4 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0072] FIG5 is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0073] FIG6 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0074] FIG7 is a schematic diagram showing the structure of the common mode of an antenna provided in the present application and the corresponding distribution of current and electric field.

[0075] FIG8 is a schematic diagram showing the structure of the differential mode of another antenna provided in the present application and the corresponding current and electric field distribution.

[0076] FIG9 is a schematic diagram of a satellite communication usage scenario provided in an embodiment of the present application.

[0077] FIG10 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0078] FIG11 is a schematic diagram of the first area and the second area in the directional diagram provided in an embodiment of the present application.

[0079] FIG12 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0080] FIG13 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0081] FIG. 14 shows the radiation efficiency and system efficiency of the first antenna 200 in the foldable electronic device 100 shown in FIG. 13 .

[0082] FIG15 shows the electric field distribution of the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the first switching state.

[0083] FIG16 is a first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the first switching state.

[0084] FIG17 is a first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the first switching state.

[0085] FIG18 shows the electric field distribution of the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the second switching state.

[0086] FIG19 is a second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the second switching state.

[0087] FIG20 is a second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG13 when in the second switching state.

[0088] FIG21 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0089] FIG22 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0090] FIG23 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0091] FIG. 24 shows the S parameters of the first antenna 200 in the foldable electronic device 100 shown in FIG. 23 .

[0092] FIG. 25 is a simulation result of the radiation efficiency of the first antenna 200 in the foldable electronic device 100 shown in FIG. 23 .

[0093] FIG26 is a directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.8 pF switch branch is coupled between the first connection point and the fourth connection point.

[0094] FIG27 is a directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.6 pF switch branch is coupled between the first connection point and the fourth connection point.

[0095] FIG28 is a directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.4 pF switch branch is coupled and connected between the first connection point and the fourth connection point.

[0096] FIG29 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0097] FIG30 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0098] FIG31 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0099] Figure 32 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0100] FIG33 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0101] FIG34 is an S-parameter simulation result of the first antenna 200 and the second antenna 400 in the foldable electronic device 100 shown in FIG33 .

[0102] FIG35 is a first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG33 when in the first switching state.

[0103] FIG36 is a second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG33 when in the second switching state.

[0104] Figure 37 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0105] FIG38 is a first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG37 when in the first switching state.

[0106] FIG39 is a second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in FIG37 when in the second switching state.

[0107] Figure 40 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0108] The following explains the terms that may appear in the embodiments of the present application.

[0109] It should be understood that the term "and / or" as used herein is simply a term used to describe the existence of three possible relationships between related objects. For example, "A and / or B" can represent the existence of A alone, the existence of both A and B, and the existence of B alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0110] When used in this application, "within the range of...", unless it is specifically stated that the end value is not included, it is assumed that both end values ​​of the range are included. For example, in the range of 1 to 5, the two values ​​1 and 5 are included.

[0111] Coupling: can be understood as direct coupling and / or indirect coupling, and "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gap between two conductive parts.

[0112] Component / device: includes at least one of lumped component / device and distributed component / device.

[0113] Lumped component / device: This refers to all components whose size is much smaller than the wavelength relative to the circuit's operating frequency. For a signal, the component's characteristics remain constant at all times, regardless of frequency.

[0114] Distributed components / devices: Unlike lumped components, if the size of the component is similar to or larger than the wavelength relative to the circuit operating frequency, then when the signal passes through the component, the characteristics of each point of the component itself will vary due to changes in the signal. At this time, the component as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed component.

[0115] Capacitance: This can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0116] Inductance: This can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductors; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a certain length of conductive material.

[0117] Radiator: A device in an antenna used to receive / send electromagnetic wave radiation. In some cases, the narrow meaning of "antenna" is the radiator, which converts the guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, used to radiate and receive radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, where it is converted into a certain polarized electromagnetic wave energy and radiated in the desired direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space into modulated high-frequency current energy and transmits it to the receiver input via the feeder line.

[0118] The radiator may include a conductor with a specific shape and size, such as a linear or sheet shape, etc., and the present application does not limit the specific shape. In one embodiment, the linear radiator can be simply referred to as a linear antenna. In one embodiment, the linear radiator can be implemented by a conductive frame, and can also be called a frame antenna. In one embodiment, the linear radiator can be implemented by a bracket conductor, and can also be called a bracket antenna. In one embodiment, the wire diameter (for example, including thickness and width) of the linear radiator, or the radiator of the linear antenna is much smaller than the wavelength (for example, the wavelength of the medium) (for example, less than 1 / 16 of the wavelength), and the length can be comparable to the wavelength (for example, the wavelength of the medium) (for example, the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of linear antennas include dipole antennas, half-wave oscillator antennas, monopole antennas, loop antennas, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna typically includes two radiating branches, and each branch is fed by a feeding portion from the feeding end of the radiating branch. For example, an inverted-F antenna (IFA) can be regarded as a monopole antenna with a ground path added. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is an inverted-F shape. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted-F antenna (also known as a PIFA, Planar Inverted F Antenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating, etc.). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet, etc. In one embodiment, the sheet radiator may include a conductive coating, such as a silver paste, etc. The shape of the sheet radiator includes circular, rectangular, annular, etc., and the present application does not limit the specific shape. The structure of a microstrip antenna generally consists of a dielectric substrate, a radiator, and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0119] The radiator may also include a slot or slot formed in a conductor, for example, a closed or semi-closed slot or slot formed in a grounded conductor surface. In one embodiment, a slotted or slotted radiator may be referred to as a slot antenna or slot antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slot of the slot antenna / slot antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is approximately 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or slot may be referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or slot (e.g., a closed slot or slot with an additional opening) may be referred to as an open slot antenna. In some embodiments, the slot is elongated. In some embodiments, the slot is approximately half a wavelength (e.g., the dielectric wavelength). In some embodiments, the slot is approximately an integer multiple of the wavelength (e.g., one wavelength). In some embodiments, the slot can be fed with a transmission line spanning one or both sides, thereby exciting a radio frequency electromagnetic field in the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of a slot antenna or slot antenna can be implemented as a conductive frame with both ends grounded, also known as a frame antenna. In this embodiment, the slot antenna or slot antenna can be considered to include a linear radiator spaced from the floor and grounded at both ends, thereby forming a closed or semi-enclosed slot or slot. In one embodiment, the radiator of a slot antenna or slot antenna can be implemented as a bracket conductor with both ends grounded, also known as a bracket antenna.

[0120] The feed circuit is a combination of all circuits used for receiving and transmitting radio frequency signals. The feed circuit may include a transceiver and an RF front end circuit. In some cases, the "feed circuit" is understood in a narrow sense as a radio frequency chip (RFIC, Radio Frequency Integrated Circuit), and the RFIC can be considered to include an RF front end chip and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). Generally, it is considered to be part of the radio frequency.

[0121] In some embodiments, the electronic device may also include a test socket (or RF socket or RF test socket). This test socket can be used to insert a coaxial cable and test the characteristics of the RF front-end circuit or antenna radiator through the cable. The RF front-end circuit can be considered as the circuit portion coupled between the test socket and the transceiver.

[0122] In some embodiments, the RF front-end circuit may be integrated into a RF front-end chip in the electronic device, or the RF front-end circuit and the transceiver may be integrated into a RF chip in the electronic device.

[0123] It should be understood that any two of the first / second / ...Nth feeding circuits in the present application can share the same transceiver, for example, transmitting signals through a radio frequency channel in a transceiver (for example, a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit, for example, processing signals through a tuning circuit or amplifier in a radio frequency front-end.

[0124] It should also be understood that two feeding circuits in the first / second / ...Nth feeding circuit in the present application usually correspond to two radio frequency test sockets in the electronic device.

[0125] A matching circuit is a circuit used to adjust the radiation characteristics of an antenna. In one embodiment, the matching circuit is coupled between the feed circuit and the corresponding radiator. In another embodiment, the matching circuit is coupled between the test socket and the radiator. Typically, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit may include a tuning circuit and / or electronic components, and the tuning circuit may be an electronic component used to switch the coupling connection of the radiator. The matching circuit performs impedance matching and / or frequency tuning functions. Generally, it is considered to be part of the antenna.

[0126] The grounding structure / feeding structure may include a connector, such as a metal spring, through which the radiator is coupled to the floor / feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure may include a transmission line / feeding line, and the grounding structure may include a grounding wire.

[0127] End / point: The "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator should not be narrowly understood as an end point or end portion that is physically disconnected from other radiators, but can also be considered as a point or a section on a continuous radiator. In one embodiment, the "end / point" may include a connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feeding end / feeding point may be a connection / coupling area on the antenna radiator that is coupled to a feeding structure or a feeding circuit (for example, an area facing a portion of the feeding circuit). For another example, the grounding end / grounding point may be a connection / coupling area on the antenna radiator that is coupled to a grounding structure or a grounding circuit (for example, an area facing a portion of the grounding circuit).

[0128] Open end, closed end: In some embodiments, the open end and the closed end are, for example, relative to whether they are grounded. The closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other conductors. The closed end is electrically connected to other conductors, and the open end is not electrically connected to other conductors. In one embodiment, the open end can also be referred to as a floating end, a free end, an open end, or an open-circuit end. In one embodiment, the closed end can also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, other conductors can be coupled through the open end to transfer coupling energy (which can be understood as transferring current).

[0129] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, the current distribution characteristics of larger current / smaller electric field can be maintained by coupling electronic devices (for example, capacitors, inductors, etc.) through the closed end. In one embodiment, the current distribution characteristics of larger current / smaller electric field can be maintained by opening a gap at or near the closed end (for example, a gap filled with insulating material).

[0130] In some embodiments, the understanding of "open end" can also be viewed from the perspective of current distribution. The open end or floating end can be understood as a point with low current on the radiator, or as a point with high electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitors, inductors, etc.) through the open end can maintain the current distribution characteristics of the low current point / high electric field point.

[0131] It should be understood that coupling the radiator end at a gap (from the perspective of the radiator structure, it is similar to the radiator at the opening of the open end or the suspended end) with electronic devices (for example, capacitors, inductors, etc.) can make the radiator end a point with larger current / smaller electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0132] The “suspended radiator” mentioned in the embodiments of the present application means that the radiator is not directly connected to the feed line / feed branch and / or the ground line / ground branch, but is fed and / or grounded through indirect coupling.

[0133] It should be understood that the "suspended" in "suspended end" and "suspended radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the suspended radiator can be, for example, a radiator disposed on the inner surface of the insulating back cover.

[0134] The current same direction / reverse direction mentioned in the embodiments of the present application should be understood as the direction of the main current on the conductor on the same side is the same direction / reverse direction. For example, when stimulating a unidirectional distributed current on a conductor that is bent or ring-shaped (for example, the current path is also bent or ring-shaped), it should be understood that, for example, the main currents stimulated on the conductors on both sides of the ring conductor (for example, a conductor surrounding a gap, on the conductors on both sides of the gap) are opposite in direction, which still falls within the definition of the unidirectional distributed current in the embodiments of the present application. In one embodiment, the current same direction on a conductor can refer to the current on the conductor having no reversal point. In one embodiment, the current reverse on a conductor can refer to the current on the conductor having at least one reversal point. In one embodiment, the current same direction on two conductors can refer to the current on both conductors having no reversal point and flowing in the same direction. In one embodiment, the current reverse on two conductors can refer to the current on both conductors having no reversal point and flowing in opposite directions. The current same direction / reversal on multiple conductors can be understood accordingly.

[0135] Resonance / resonance frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, the antenna / radiator mentioned in this application produces a "first / second... resonance", where the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the lowest frequency resonance generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can generate a corresponding fundamental mode resonance.

[0136] Resonant frequency band: The range of the resonant frequency is the resonant frequency band. The return loss characteristic of any frequency point in the resonant frequency band can be less than -6dB or -5dB.

[0137] Communication frequency band / operating frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna that supports the B40 frequency band operates between 2300MHz and 2400MHz, or in other words, the antenna's operating frequency band includes the B40 frequency band. The frequency range that meets the required specifications can be considered the antenna's operating frequency band.

[0138] The resonant frequency band and the operating frequency band may be the same, or may partially overlap. In one embodiment, one or more resonant frequency bands of the antenna may overlap one or more operating frequency bands of the antenna.

[0139] Electrical length: It can refer to the ratio of physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0140] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0141] Wavelength: Or operating wavelength, this can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, if the center frequency of the B1 uplink frequency band (resonant frequency 1920MHz to 1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using 1955MHz. "Operating wavelength" is not limited to the center frequency; it can also refer to the wavelength corresponding to a non-center frequency of the resonant frequency or operating frequency band.

[0142] It should be understood that the wavelength of the radiation signal in air can be calculated as follows: (wavelength in air, or wavelength in vacuum) = speed of light / frequency, where frequency is the frequency of the radiation signal (MHz) and the speed of light can be taken as 3×108 m / s. The wavelength of the radiation signal in the medium can be calculated as follows: medium Wherein, ε is the relative dielectric constant of the medium. The wavelength in the embodiments of the present application generally refers to the dielectric wavelength, which can be the dielectric wavelength corresponding to the center frequency of the resonant frequency, or the dielectric wavelength corresponding to the center frequency of the working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, the wavelength can be the dielectric wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "dielectric wavelength" can also refer to the dielectric wavelength corresponding to the non-center frequency of the resonant frequency or the working frequency band. For ease of understanding, the dielectric wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one or more sides of the radiator.

[0143] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0144] Antenna radiation efficiency refers to the ratio of the power radiated by an antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Active power input to the antenna = antenna input power minus power loss; power loss primarily includes return loss and metal ohmic loss and / or dielectric loss. Radiation efficiency measures the antenna's radiation capability, and both metal loss and dielectric loss contribute to it.

[0145] Those skilled in the art will understand that efficiency is generally expressed as a percentage, which has a corresponding conversion relationship with dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna.

[0146] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port by the antenna circuit to the antenna port's transmitted power. The smaller the reflected signal, the larger the signal radiated from the antenna into space, and the greater the antenna's radiation efficiency. The larger the reflected signal, the smaller the signal radiated from the antenna into space, and the lower the antenna's radiation efficiency.

[0147] Antenna return loss can be expressed using the S11 parameter, a type of S parameter. S11 represents the reflection coefficient and characterizes the antenna's transmission efficiency. The S11 parameter is typically negative. A smaller S11 parameter indicates lower antenna return loss and less energy reflected back from the antenna itself, meaning more energy actually enters the antenna and higher system efficiency. A larger S11 parameter indicates greater antenna return loss and lower system efficiency.

[0148] It should be noted that in engineering, an S11 value of -6dB is generally used as a standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or the antenna can be considered to have good transmission efficiency.

[0149] Antenna pattern: Also known as radiation pattern. It is a graph showing how the relative field strength (normalized modulus) of the antenna's radiation field changes with direction at a certain distance from the antenna (far field). It is usually represented by two mutually perpendicular plane patterns passing through the antenna's direction of maximum radiation.

[0150] Antenna patterns typically have multiple radiation beams. The beam with the strongest radiation intensity is called the main lobe, while the remaining beams are called side lobes. Among the side lobes, those in the opposite direction of the main lobe are also called back lobes.

[0151] Beamwidth: This refers to the range of angles within a first range relative to the top of the electronic device (e.g., the y-direction) where the gain of the antenna's pattern is greater than or equal to a threshold. This first angle is the beamwidth. When the first angle is large, for example, greater than or equal to 60°, the antenna is considered to have a wide beam and exhibit good radiation characteristics within this angle range.

[0152] Directivity: Also known as the directivity of an antenna, it refers to the ratio of the maximum power density to the average power density in the antenna pattern at a certain distance from the antenna (far field). It is a dimensionless ratio greater than or equal to 1. It can be used to indicate the energy radiation characteristics of an antenna. A larger directivity indicates that the antenna radiates more energy in a certain direction and the energy radiation is more concentrated.

[0153] Antenna Gain: This is used to measure how well an antenna radiates input power. Generally, the narrower the main lobe of an antenna pattern and the smaller the side lobes, the higher the antenna gain.

[0154] Polarization direction of an antenna: At a given point in space, the electric field strength E (vector) is a function of time t. As time passes, the endpoints of the vector periodically trace a trajectory in space. If this trajectory is straight and perpendicular to the ground, it is called vertical polarization. If it is horizontal to the ground, it is called horizontal polarization. If this trajectory is elliptical or circular and rotates clockwise or to the right as viewed along the propagation direction, it is called right-hand circular polarization (RHCP). If it rotates counterclockwise or to the left as viewed along the propagation direction, it is called left-hand circular polarization (LHCP).

[0155] Ground (GND): can generally refer to at least a part of any grounding layer, grounding plate, or grounding metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components. "Ground / floor" can be used for grounding components in an electronic device, or in other words, can be used as a reference ground for components in an electronic device. Usually, large pieces of metal (for example, metal layers) in an electronic device can be used as "ground / floor". In one embodiment, the "ground / floor" can include any one or more of the following: the grounding layer of the circuit board of the electronic device, the grounding plate formed by the middle frame of the electronic device, the grounding metal layer formed by the metal film under the screen, the conductive grounding layer of the battery, the metal hinge of a foldable electronic device, the metal back cover of the electronic device (for example, when at least a part of the back cover is metal), and conductive parts or metal parts electrically connected to the above grounding layer / grounding plate / metal layer. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically isolated by dielectric or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a routing layer, and the routing layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on a chip (SoC), etc. can be mounted on or connected to the circuit board; or electrically connected to the routing layer and / or ground layer in the circuit board. For example, a radio frequency source is provided in the routing layer.

[0156] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of a conductive material. In one embodiment, the conductive material can be any of the following: copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will appreciate that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0157] Grounding refers to coupling with the ground / floor via a grounding structure and / or grounding circuit. In one embodiment, grounding can be achieved through physical grounding, such as achieving physical grounding at a specific location on the frame through a portion of the middle frame's structural components (or referred to as a physical ground). In one embodiment, grounding can be achieved through device grounding, such as grounding through a capacitor, inductor, resistor, or other device connected in series or parallel (or referred to as a device ground).

[0158] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0159] As shown in FIG1 , electronic device 100 may include a cover 13, a display / module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, cover 13 may be a glass cover or may be replaced with a cover made of other materials, such as a PET (Polyethylene terephthalate) material.

[0160] The cover plate 13 may be disposed closely against the display module 15 , and may be mainly used to protect the display module 15 and prevent dust.

[0161] In one embodiment, the display module 15 may include a liquid crystal display panel (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., which is not limited in the embodiment of the present application.

[0162] The middle frame 19 mainly supports the entire device. FIG1 shows that the PCB 17 is arranged between the middle frame 19 and the back cover 21. It should be understood that in one embodiment, the PCB 17 can also be arranged between the middle frame 19 and the display module 15. This embodiment of the present application does not limit this. The printed circuit board PCB 17 can be made of a flame-resistant material (FR-4) dielectric board, a Rogers dielectric board, a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a grade of flame-resistant material, and the Rogers dielectric board is a high-frequency board. Electronic components, such as radio frequency chips, are carried on the PCB 17. In one embodiment, a metal layer can be provided on the printed circuit board PCB 17. The metal layer can be used to ground the electronic components carried on the printed circuit board PCB 17, and can also be used to ground other components, such as bracket antennas, frame antennas, etc. The metal layer can be called a floor, a grounding plate, or a grounding layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any layer of the dielectric board in the PCB 17. In one embodiment, the metal layer used for grounding can be provided on the side of the printed circuit board PCB 17 near the middle frame 19. In one embodiment, the edge of the printed circuit board PCB 17 can be considered the edge of its ground layer. In one embodiment, the metal middle frame 19 can also be used to ground the aforementioned components. The electronic device 100 may also have other floor / ground planes / ground layers, as previously described and will not be further described here.

[0163] Due to the compactness of electronic devices, a floor / grounding plate / grounding layer is typically provided within a 0-2mm internal space from the inner surface of the frame (for example, the printed circuit board, midframe, screen metal layer, battery, etc. can all be considered part of the floor). In one embodiment, a dielectric is filled between the frame and the floor, and the length and width of the rectangle enclosed by the inner surface contour of the dielectric filling can be simply considered the length and width of the floor. Alternatively, the length and width of the rectangle enclosed by the contour of all conductive parts within the frame can be considered the length and width of the floor.

[0164] The electronic device 100 may further include a battery (not shown). The battery may be disposed between the middle frame 19 and the back cover 21, or between the middle frame 19 and the display module 15, and this is not limited in this embodiment of the present application. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery may be disposed between the main board and the sub-board. The main board may be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board may be disposed between the middle frame 19 and the lower edge of the battery.

[0165] The electronic device 100 may further include a frame 11, which may be made of a conductive material such as metal. The frame 11 may be disposed between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 100. The frame 11 may have four sides surrounding the display module 15 to help secure the display module 15.

[0166] In one implementation, the frame 11, which primarily comprises a conductive material, can be referred to as a conductive frame or metal frame of the electronic device 100, and is suitable for use in industrial designs (ID) with a metallic appearance. In one implementation, the outer surface of the frame 11 is primarily made of a conductive material, such as a metal material, thereby creating the appearance of a metallic frame. In these implementations, the conductive portion of the frame 11, including the outer surface, can serve as an antenna radiator for the electronic device 100 and is generally referred to as a frame antenna.

[0167] In another implementation, the outer surface of the frame 11 is primarily composed of a non-conductive material, such as plastic, creating a non-metallic frame appearance suitable for non-metallic IDs. In one implementation, the inner surface of the frame 11 may include a conductive material, such as metal. In this implementation, the conductive portion of the inner surface of the frame 11 can serve as an antenna radiator for the electronic device 100. It should be understood that the radiator (or, in other words, the conductive material on the inner surface) disposed on the inner surface of the frame 11 can be positioned adjacent to the non-conductive material of the frame 11 to minimize the volume occupied by the radiator and to be closer to the exterior of the electronic device 100, achieving better signal transmission. This can also be referred to as a frame antenna. It should be noted that the antenna radiator being positioned adjacent to the non-conductive material of the frame 11 means that the antenna radiator can be positioned closely to the inner surface of the non-conductive material, embedded within the non-conductive material, or positioned close to the inner surface of the non-conductive material, for example, with a small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive and non-conductive materials can be considered part of the frame 11.

[0168] It should be understood that there may be insulating gaps on the frame 11, and the conductive parts of the frame between the insulating gaps and / or between the insulating gaps and the grounding points serve as radiators, thereby forming a frame antenna (it should be understood that the radiator of the frame antenna may also include the conductive parts of the frame between the grounding points). When the frame 11 is formed of a conductive material such as metal, the insulating gap can be understood as the gap opened in the frame 11 being filled with non-metallic material (insulating material). In this case, the gap is visible on the exterior surface. When the outer surface of the frame 11 is a non-conductive material, the insulating gap can be understood as the end of the radiator on the inner surface of the frame 11 (for example, the end that is not electrically connected to other radiators or conductors), or as the gap formed between radiators on the inner surface of the frame 11. Non-metallic material (insulating material) may be provided in the gap, or non-metallic material may not be provided, for example, it may be filled with air. In this case, the gap is not visible on the exterior surface.

[0169] The middle frame 19 may include a border 11, and the middle frame 19 including the border 11 is an integral part that can support the electronic devices in the whole machine. The cover 13 and the back cover 21 are respectively covered along the upper and lower edges of the border to form a shell or housing (housing) of the electronic device. In one embodiment, the cover 13, the back cover 21, the border 11 and / or the middle frame 19 can be collectively referred to as the shell or housing of the electronic device 100. It should be understood that "shell or housing" can be used to refer to part or all of any one of the cover 13, the back cover 21, the border 11 or the middle frame 19, or to part or all of any combination of the cover 13, the back cover 21, the border 11 or the middle frame 19.

[0170] The frame 11 can at least partially serve as an antenna radiator to transmit and receive radio frequency signals. A gap can exist between this portion of the frame serving as the radiator and the rest of the middle frame 19 to ensure a good radiation environment for the antenna radiator. In one embodiment, the middle frame 19 can have an aperture in this portion of the frame serving as the radiator to facilitate antenna radiation.

[0171] Alternatively, the frame 11 may not be considered as part of the middle frame 19. In one embodiment, the frame 11 may be connected to the middle frame 19 and formed as one piece. In another embodiment, the frame 11 may include a protrusion extending inward to be connected to the middle frame 19, for example, by means of a shrapnel, screws, welding, etc. The protrusion of the frame 11 can also be used to receive a feed signal, so that at least a portion of the frame 11 serves as a radiator of the antenna to receive / transmit radio frequency signals. There may be a gap between this part of the frame that serves as the radiator and the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment, so that the antenna has a good signal transmission function.

[0172] The back cover 21 can be made of metal, non-conductive materials such as glass or plastic, or a combination of conductive and non-conductive materials. In one embodiment, the conductive back cover 21 can replace the middle frame 19 and integrate with the frame 11 to support the electronic components within the device.

[0173] In one embodiment, the middle frame 19 and / or the conductive parts in the back cover 21 can serve as a reference ground for the electronic device 100, wherein the frame 11, PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0174] The antenna of electronic device 100 may also be disposed within the housing, such as a bracket antenna or millimeter-wave antenna (not shown in FIG1 ). The clearance for the antenna disposed within the housing can be provided by a slot / opening in any of the middle frame, and / or the frame, and / or the back cover, and / or the display screen, or by a non-conductive gap / aperture formed between any of these. The antenna clearance ensures the antenna's radiation characteristics. It should be understood that the antenna clearance can be a non-conductive area formed by any conductive component within electronic device 100, through which the antenna radiates signals to the outside world. In one embodiment, antenna 40 may be in the form of an antenna based on a flexible printed circuit (FPC), an antenna based on laser-direct-structuring (LDS), or a microstrip disk antenna (MDA). In one embodiment, the antenna may also be a transparent structure embedded within the screen of electronic device 100, such that the antenna is a transparent antenna unit embedded within the screen of electronic device 100.

[0175] Figure 2 is a schematic diagram of the structure of a foldable electronic device 100 provided in an embodiment of the present application. Foldable electronic device 100 can be a mobile phone, tablet computer, e-reader, laptop computer, wearable device such as a watch, or other electronic device with folding functionality. The embodiment shown in Figure 2 is described using a foldable mobile phone as an example.

[0176] It should be understood that FIG1 only shows an electronic device 100 including one shell (for example, the above-mentioned middle frame 19 ). In actual production or design, the electronic device 100 may also include multiple shells to form a foldable electronic device 100 .

[0177] Referring to Figure 2 , the foldable electronic device 100 may include a flexible display 110 (which may correspond to the display module 15 in Figure 1 ), a first frame 121 (which may correspond to the frame 11 in Figure 1 ), a first cover 122, a second frame 123 (which may correspond to the frame 11 in Figure 1 ), a second cover 124, and a hinge 125. In some embodiments, the first frame 121, the first cover 122, the second frame 123, and the second cover 124 may form a first housing 126 (which may correspond to the middle frame 19 in Figure 1 ) and a second housing 127 (which may correspond to the middle frame 19 in Figure 1 ) that support the flexible display 110. In other embodiments, at least one of the first cover 122 and the second cover 124 may include a display.

[0178] 2 is filled with a dot matrix pattern that schematically represents the flexible display screen 110. The flexible display screen 110 may be flexible and bendable, and may provide users with a new interaction method based on its bendability.

[0179] The flexible display screen 110 may include a first display portion 111 corresponding to the first housing 126 , a second display portion 112 corresponding to the second housing 127 , and a foldable display portion 113 corresponding to the hinge 125 . The foldable display portion 113 may be connected between the first display portion 111 and the second display portion 112 .

[0180] The first frame 121 can surround the outer periphery of the first cover 122, and at least a portion of the first frame 121 can also surround the outer periphery of the first display portion 111. The first display portion 111 can be arranged parallel to the first cover 122 and spaced apart from the first frame 121. The first display portion 111 and the first cover 122 can be located on either side of the first frame 121. The space between the first display portion 111 and the first cover 122 can be used to accommodate components of the foldable electronic device 100, such as antennas and circuit board components.

[0181] The second frame 123 can surround the outer periphery of the second cover 124, and at least a portion of the second frame 123 can also surround the outer periphery of the second display portion 112. The second display portion 112 can be arranged parallel to the second cover 124 and spaced apart from the second frame 123. The second display portion 112 and the second cover 124 can be located on either side of the second frame 123. The space between the second display portion 112 and the second cover 124 can be used to accommodate components of the foldable electronic device 100, such as antennas and circuit board components.

[0182] In one embodiment provided herein, the cover and the frame may be two parts of the housing of the foldable electronic device 100. The cover and the frame may be connected, and the form of the connection may not be an assembly method such as snap-on, gluing, welding, riveting, or clearance fit. The connection between the cover and the frame is usually difficult to separate. In another embodiment provided herein, the cover and the frame may be two different components. By assembling the cover and the frame together, the housing of the foldable electronic device 100 can be formed.

[0183] The hinge 125 can be connected between the first housing 126 and the second housing 127. The hinge 125 can move the first housing 126 and the second housing 127 closer to or farther from each other. Accordingly, the first display portion 111 of the flexible display 110 and the second display portion 112 of the flexible display 110 can move closer to or farther from each other, allowing the flexible display 110 to be folded or unfolded.

[0184] In one example, the rotating shaft 125 may include a main shaft, a first connecting component, and a second connecting component. The first connecting component may be fixed to the first cover 122, and the second connecting component may be fixed to the second cover 124. The first and second connecting components are rotatable relative to the main shaft. The mutual movement of the first and second connecting components can drive the mutual movement of the first and second housings 126 and 127, thereby realizing the opening and closing function of the foldable electronic device 100.

[0185] The foldable electronic device 100 shown in FIG2 is currently in a possible unfolded state. In this unfolded state, the angle between the first housing 126 and the second housing 127 can be 180 degrees, or what can be called a flattened state. The flexible display 110 can be in the flattened state shown in FIG2.

[0186] The flexible display 110 being in a flattened state can be understood as the angle between the first display portion 111 corresponding to the first housing 126 and the second display portion 112 corresponding to the second housing 127 being 180 degrees. Due to certain errors that may exist in engineering implementation, the flexible display 110 can be considered to be in a flattened state when the angle between the first display portion 111 and the second display portion 112 is between 170 degrees and 190 degrees.

[0187] FIG3 illustrates a possible folded state of the foldable electronic device 100. FIG3 shows the foldable electronic device 100 in an outwardly folded state (the outwardly folded state may be referred to as the outwardly folded state). The outwardly folded state illustrated in FIG3 may be, for example, a left-right outwardly folded state or a top-bottom outwardly folded state. The following describes a possible folded state of the foldable electronic device 100 in conjunction with FIG2 and FIG3.

[0188] In the embodiments of the present application, the foldable electronic device 100 being in a folded state may mean that the foldable electronic device 100 is currently bent and the degree of bending of the foldable electronic device 100 has reached its maximum. In this case, the first cover 122 and the second cover 124 may be approximately parallel, spaced apart from each other, and disposed face to face, with the spacing between the first cover 122 and the second cover 124 being minimized. At least portions of the first housing 126 and the second housing 127 are contained within the space enclosed by the flexible display 110. The first display portion 111, the first housing 126, the second housing 127, and the second display portion 112 are sequentially stacked. Similarly, the first display portion 111 and the second display portion 112 may be approximately parallel, spaced apart from each other, with the spacing between the first cover 122 and the second cover 124 being smaller than the spacing between the first display portion 111 and the second display portion 112. In this case, the first display portion 111 and the second display portion 112 may be considered to be located on different planes.

[0189] 2 and 3 , when the foldable electronic device 100 is in the outward folded state, the first cover 122 and the second cover 124 can be brought into close proximity, and the first display portion 111 and the second display portion 112 can be brought into close proximity. The first display portion 111, the second display portion 112, and the foldable display portion 113 can form a housing area for accommodating the first cover 122, the second cover 124, and the hinge 125. In other words, the first cover 122, the second cover 124, and the hinge 125 can be accommodated in the space between the first display portion 111 and the second display portion 112.

[0190] It should be understood that the foldable electronic device 100 can be folded inward (the inward folded state can be simply referred to as the inward folded state). When the foldable electronic device 100 is in the inward folded state, the first cover 122 and the second cover 124 can be close to each other, and the first display portion 111 and the second display portion 112 can be close to each other. The first cover 122, the second cover 124 and the hinge 125 can form a housing area for accommodating the first display portion 111, the second display portion 112, and the foldable display portion 113. In other words, the first display portion 111, the second display portion 112, and the foldable display portion 113 can be accommodated in the space between the first cover 122 and the second cover 124.

[0191] The foldable electronic device 100 can switch between a folded state and an unfolded state. When the foldable electronic device 100 is in the folded state, the foldable electronic device 100 occupies a relatively small space. When the foldable electronic device 100 is in the unfolded state, the foldable electronic device 100 can display a relatively large screen to increase the user's viewing area. It should be understood that the folded state includes a closed state, in which the foldable electronic device 100 occupies the smallest space; the unfolded state includes a flattened state, in which the foldable electronic device 100 occupies the largest space.

[0192] The foldable electronic device 100 may further include a third housing 128 and a hinge 129, as shown in FIG4 . The hinge 129 may be connected between the third housing 128 and the second housing 127. The third housing 128 and the second housing 127 may be moved closer to or further away from each other. As the number of foldable portions of the foldable electronic device 100 increases, the space occupied by the foldable electronic device 100 may be further reduced in the folded state while maintaining the same screen size in the unfolded state.

[0193] In the foldable electronic device 100 shown in Figure 4, since it has three foldable parts (first shell 126, second shell 127 and third shell 128), the foldable electronic device 100 has at least three forms: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0194] 1. As shown in FIG4 , a possible unfolded state of the foldable electronic device 100 is shown. In the unfolded state, the angle between the first housing 126 , the second housing 127 , and the third housing 128 may be approximately 180°. The flexible display 110 may be in the unfolded state.

[0195] 2. Figure 5 shows a possible folded state (tri-folded state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the rotation axis 125, and the second housing 127 and the third housing 128 rotate along the rotation axis 129, thereby achieving the maximum degree of curvature of the foldable electronic device 100. In this state, the first housing 126, the second housing 127, and the third housing 128 can be considered to be located on different planes.

[0196] It should be understood that for the sake of simplicity, in the structure shown in FIG5 , the folded state of the foldable electronic device 100 is an S-fold (the side of the foldable electronic device 100 is S-shaped, and the second shell 127 is located between the first shell 126 and the third shell 128). In one embodiment, the folded state of the foldable electronic device 100 can also be a G-fold (the side of the foldable electronic device 100 is G-shaped, and the third shell 128 is located between the first shell 126 and the second shell 127). The embodiment of the present application does not limit the folding state of the foldable electronic device 100.

[0197] 3. As shown in FIG6 , a possible partially unfolded state (two-folded state) of the foldable electronic device 100 is shown. In the partially unfolded state, the angle between the first shell 126 and the second shell 127 can be approximately 180°, and the second shell 127 and the third shell 128 rotate along the rotation axis 129, so that the third shell 128 approaches the second shell 127. In this case, the first shell 126 and the second shell 127 are considered to be located on the same plane, and the second shell 127 and the third shell 128 can be considered to be located on different planes. In another possible partially unfolded state, the angle between the third shell 128 and the second shell 127 can be approximately 180°, and the first shell 126 and the second shell 127 rotate along the rotation axis 125, so that the first shell 126 approaches the second shell 127.

[0198] FIG1 and FIG2 only schematically illustrate some components included in the electronic device 10 and the foldable electronic device 100 , and the actual shapes, actual sizes, and actual structures of these components are not limited by the above drawings.

[0199] It should be understood that in the embodiments of the present application, the surface where the display screen of the electronic device is located can be considered as the front surface, the surface where the back cover is located can be considered as the back surface, and the surface where the frame is located can be considered as the side surface.

[0200] It should be understood that in the embodiments of the present application, when a user holds an electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when a user holds an electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side.

[0201] First, the two antenna modes involved in this application are introduced by Figures 7 and 8. Figure 7 is a schematic diagram of the structure of the common mode mode of an antenna provided by this application and the corresponding current and electric field distribution. Figure 8 is a schematic diagram of the structure of the differential mode mode of another antenna provided by this application and the corresponding current and electric field distribution. The antenna radiator in Figures 7 and 8 is open at both ends, and its common mode mode and differential mode mode can be referred to as a line common mode mode and a line differential mode mode, respectively.

[0202] It should be understood that the "common mode" or "CM mode" in this application includes the line common mode mode and the slot common mode mode, and the "differential mode mode" or "DM mode" in this application includes the line differential mode mode and the slot differential mode mode, which can be specifically determined according to the structure of the antenna.

[0203] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode and line differential mode generated on the same radiator, or refers to the slot common mode and slot differential mode generated on the same radiator, which can be specifically determined according to the structure of the antenna.

[0204] 1. Wire common mode (CM) mode

[0205] (a) in Figure 7 shows that the radiator of the antenna 40 is open at both ends and is connected to a feeding circuit (not shown) at the middle position 41. In one embodiment, the feeding form of the antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of the antenna 40 through a feeding line 42. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit being connected to the radiator and the other end being coupled to the floor to achieve grounding, wherein the connection point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator. The center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint).

[0206] The middle position 41 of the antenna 40 may be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection between the feed line 42 and the antenna 40 covers the middle position 41 .

[0207] (b) in FIG7 shows the current and electric field distribution of the antenna 40. As shown in (b) in FIG7, the current is distributed in opposite directions on both sides of the middle position 41, for example, symmetrically; the electric field is distributed in the same direction on both sides of the middle position 41. As shown in (b) in FIG7, the current at the feed line 42 is distributed in the same direction. Based on the same direction distribution of the current at the feed line 42, the feeding shown in (a) in FIG7 can be called line CM feeding. Based on the opposite distribution of the current on both sides of the connection between the radiator and the feed line 42, the antenna mode shown in (b) in FIG7 can be called a line CM mode (also referred to as a CM mode for short, for example, for a linear antenna, the CM mode refers to a line CM mode). The current and electric field shown in (b) in FIG7 can be respectively referred to as the current and electric field of the line CM mode.

[0208] The current is stronger at the center 41 of the antenna 40 (the highest current point is near the center 41 of the antenna 40) and weaker at both ends of the antenna 40, as shown in FIG7(b). The electric field is weaker at the center 41 of the antenna 40 and stronger at both ends of the antenna 40.

[0209] 2. Line differential mode (DM) mode

[0210] As shown in Figure 8(a), the left and right ends of the two radiators of antenna 50 are open, and a feed circuit is connected at a center position 51. In one embodiment, antenna 50 uses an anti-symmetrical feed. One end of the feed circuit is connected to one of the radiators via a feed line 52, and the other end of the feed circuit is connected to the other radiator via a feed line 52. Center position 51 can be the geometric center of antenna 50 or the gap formed between the radiators.

[0211] It should be understood that the "center-antisymmetric feeding" mentioned in this application can be understood as the positive and negative poles of the feed unit being connected to two connection points near the aforementioned midpoint of the radiator. In one embodiment, the signals output by the positive and negative poles of the feed unit have the same amplitude but opposite phases, for example, a phase difference of 180°±10°.

[0212] Figure 8(b) shows the current and electric field distribution of antenna 50. As shown in Figure 8(b), the current is distributed in the same direction on both sides of the center position 51 of antenna 50, for example, with an antisymmetric distribution; the electric field is distributed in opposite directions on both sides of the center position 51. As shown in Figure 8(b), the current at the feed line 52 is distributed in opposite directions. Based on the opposite current distribution at the feed line 52, the feeding shown in Figure 8(a) can be referred to as linear DM feeding. Based on the current being distributed in the same direction on both sides of the connection between the radiator and the feed line 52, the antenna mode shown in Figure 8(b) can be referred to as a linear DM mode (or simply a DM mode, for example, for a linear antenna, a DM mode refers to a linear DM mode). The current and electric field shown in Figure 8(b) can be referred to as the current and electric field of the linear DM mode, respectively. It should be understood that based on the current being distributed in the same direction on both sides of the connection between the radiator and the feed line 52, the antenna mode shown in Figure 8(b) can also be referred to as a half-antenna mode, a half-wavelength mode, or simply a half-mode.

[0213] In one embodiment, in the wire DM mode, or half mode, the current is stronger at the center 51 of the antenna 50 (the highest current point is near the center 51 of the antenna 50) and weaker at both ends of the antenna 50, as shown in FIG8(b). The electric field is weaker at the center 51 of the antenna 50 and stronger at both ends of the wire antenna 50.

[0214] It should be understood that the antenna radiator can be understood as a metal structural member that generates radiation, and the number of the radiator can be one, as shown in FIG7 , or two, as shown in FIG8 , which can be adjusted according to actual design or production needs. For example, for the line CM mode, two radiators can be used as shown in FIG8 , with the two ends of the two radiators arranged opposite to each other and separated by a gap. A symmetrical feeding method is adopted at the two ends close to each other, for example, the same feed source signal is fed to the two ends of the two radiators close to each other, and an effect similar to the antenna structure shown in FIG7 can also be obtained. Correspondingly, for the line DM mode, one radiator can be used as shown in FIG7 , with two feeding points set in the middle of the radiator and an anti-symmetrical feeding method is adopted. For example, if two symmetrical feeding points on the radiator are fed with signals with the same amplitude and opposite phases, an effect similar to the antenna structure shown in FIG8 can also be obtained.

[0215] 3. Line CM-DM mode

[0216] FIG7 and FIG8 respectively show that when both ends of the radiator are open, a line CM mode and a line DM mode are generated by adopting different feeding methods.

[0217] When the antenna uses asymmetric feeding (the feeding point is offset from the center of the radiator, including side or offset feeding), or the radiator's grounding point (where it couples with the floor) is asymmetric (the grounding point is offset from the center of the radiator), the antenna can simultaneously produce a first resonance and a second resonance, corresponding to the linear CM mode and the linear DM mode, respectively. For example, the first resonance corresponds to the linear CM mode, with the current and electric field distributions shown in Figure 7(b). The second resonance corresponds to the linear DM mode, with the current and electric field distributions shown in Figure 8(b).

[0218] FIG9 is a schematic diagram of a satellite communication usage scenario provided in an embodiment of the present application.

[0219] As shown in Figure 9, when a user uses an electronic device for satellite communication, the area of ​​the electronic device's antenna with better radiation characteristics needs to be pointed toward the satellite to achieve satellite alignment (establish a communication connection with the satellite). In one embodiment, the area with better radiation characteristics includes the maximum radiation direction in the antenna pattern.

[0220] During satellite communications, the relative position of the electronic device and the satellite changes. For example, if a low-orbit satellite moves, the satellite may exceed the antenna's area of ​​good radiation characteristics (for example, the antenna has good radiation characteristics within a 30-degree angle from the top, but the satellite is located outside this area). In this case, the user needs to change the grip or move the device to keep the satellite within the antenna's area of ​​good radiation characteristics to maintain the satellite tracking status or establish a connection with a new satellite. Otherwise, the communication quality will be poor or even dropped, which will greatly affect the user's communication experience.

[0221] This application provides a foldable electronic device including an antenna. The antenna's operating frequency band includes a satellite communication frequency band. The antenna utilizes a conductive portion of its frame as a radiator. The antenna can generate different maximum radiation directions, thereby enhancing the user experience during satellite communication.

[0222] FIG10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0223] It should be understood that the foldable electronic device 100 described in the embodiments of the present application is merely a schematic diagram, illustrating only the structure of the areas relevant to the embodiments of the present application. In actual production or design, other areas may be adjusted. For example, the frame (e.g., the first frame or the second frame) may have multiple insulating gaps or couple with the floor at multiple points to form radiators or parasitic branches of other antennas, but the embodiments of the present application do not limit this.

[0224] As shown in FIG. 10 , the foldable electronic device 100 may include a first housing 201 , a second housing 202 , a first hinge 203 , and a floor 300 .

[0225] It should be understood that the floor 300 described in the embodiment of the present application has different sizes in different states of the foldable electronic device 100. In one embodiment, when the foldable electronic device 100 is in the folded state, the ratio of the length to the width of the floor 300 is greater than or equal to 1.6 and less than or equal to 2.5. Here, the width can be understood as the size of the floor 300 in the extension direction of the top edge (top edge) or the bottom edge (bottom edge) of the foldable electronic device 100. In one embodiment, when the foldable electronic device 100 is in the flattened state, the length of the foldable electronic device 100 remains unchanged and the width increases, and the ratio of the length to the width of the floor 300 is greater than or equal to 0.8 and less than or equal to 1.5.

[0226] Among them, the width and length of the floor 300 can be understood as the dimensions of the equivalent floor formed by all metal layers or metal parts that can be equivalent to the floor (for example, the middle plate, the metal layer in the PCB, the metal layer in the display screen, etc.) in the length extension direction and the width extension direction.

[0227] It should be understood that, for ease of understanding, since the middle plate of the middle frame can be regarded as part of the floor and part of the frame in the middle frame can be grounded, the outer contour size of the entire foldable electronic device 100 can be regarded as the size of the floor.

[0228] The first housing 201 includes a first frame 210, at least a portion of which is spaced apart from the floor 300. The second housing 202 includes a second frame 220, at least a portion of which is spaced apart from the floor 300.

[0229] The first rotating shaft 203 is located between the first housing 201 and the second housing 202 and is rotatably connected to the first housing 201 and the second housing 202, respectively, allowing the first housing 201 and the second housing 202 to rotate relative to each other. In one embodiment, the floor 300 may include a first portion and a second portion. The first portion may be located within the first housing 201, and the second portion may be located within the second housing 202. The first portion and the second portion may be connected by the first rotating shaft 203.

[0230] It should be understood that in the foldable electronic device 100 shown in FIG10 , the first rotation shaft 203 is directly connected to the first housing 201 and the second housing 202, respectively, enabling relative rotation of the first and second housings 201 and 202. Furthermore, the phrase "the first rotation shaft 203 is rotatably connected to the first and second housings 201 and 202" includes the case where the first rotation shaft 203 is rotatably connected to the first or second housing via one or more second rotation shafts and one or more intermediate housings. For example, in one embodiment, the foldable electronic device 100 may further include a first rotation shaft and a second rotation shaft, as well as one or more intermediate housings located between the first and second rotation shafts. The first rotation shaft is located between the first housing 201 and the intermediate housing, and is rotatably connected to the first and intermediate housings, respectively, enabling relative rotation of the first and intermediate housings. The second rotation shaft is located between the intermediate and second housings 202, and the first rotation shaft 203 is rotatably connected to the intermediate and second housings, respectively, enabling relative rotation of the intermediate and second housings 202.

[0231] The first frame 210 includes a first position 211 and a second position 212. The second position 212 is closer to the first rotation axis (203) than the first position 211 in a first direction, and the first direction is perpendicular to the extension direction of the first rotation axis 203.

[0232] In one embodiment, the second position 212 is located on the first side 301 of the first frame 210. The second position 212 is located on the second side 302 of the first frame 210. The first side 301 and the second side 302 intersect at an angle. The length of the first side 301 is less than the length of the second side 302. In one embodiment, the first position 211 and the second position 212 are located on the first side 301 of the first frame 210. In one embodiment, the second position 212 is located between the first position 211 and the first rotation axis 203.

[0233] The second frame 220 includes a third position 213 and a fourth position 214. The third position 213 is closer to the first rotation axis 203 than the fourth position 214 in the first direction.

[0234] In one embodiment, the third position 213 is located on the third side 303 of the second frame 220. The fourth position 214 is located on the fourth side 304 of the second frame 220. The third side 303 and the fourth side 304 intersect at an angle. The length of the third side 303 is less than the length of the fourth side 304. In one embodiment, the third position 213 and the fourth position 214 are located on the third side 303 of the second frame 220. In one embodiment, the third position 213 is located between the fourth position 214 and the first rotation axis 203.

[0235] It should be understood that when the flexible display screen of the foldable device 100 is fully unfolded (at this time, the device is in a flattened state), the above-mentioned first direction can be understood as the extension direction perpendicular to the first rotation axis 203 within the unfolded plane of the flexible display screen of the foldable electronic device 100. For example, as shown in Figure 10, the extension direction of the first rotation axis 203 is the z direction, and the first direction is the x direction.

[0236] It should be understood that when the flexible display of the foldable device 100 is bent, the first direction on the side of the first housing 201 can be understood as the direction perpendicular to the extension of the first rotation axis 203 within the plane of the first display portion of the flexible display, and the first direction on the side of the second housing 202 can be understood as the direction perpendicular to the extension of the first rotation axis 203 within the plane of the second display portion of the flexible display. Therefore, when the flexible display of the foldable device 100 is bent, the first direction on the side of the first housing 201 and the first direction on the side of the second housing 202 form an angle between them. For ease of description, they are collectively referred to as the "first direction."

[0237] In one embodiment, when the foldable electronic device 100 is in the unfolded state, the first side 301 and the third side 303 are collinearly arranged and located on both sides of the first rotation axis 203. "Collinear" can be understood as being collinear along the outer contour of the foldable electronic device 100. However, due to engineering design and other reasons, local curved or bent areas may exist, which should also be understood within the scope of the embodiments of the present application. "Both sides" can be understood as being on both sides of the extension direction of the first rotation axis 203 (e.g., left and right sides).

[0238] In one embodiment, when the foldable electronic device 100 is in the unfolded state, the first side 301 and the third side 303 are the same side of the foldable electronic device 100. For simplicity, the first side 301 and the third side 303 are only the top side (or bottom side) of the foldable electronic device 100. The top side / bottom side of the foldable electronic device 100 can be understood as the top / bottom side in the unfolded state, for example, the top / bottom side of the desktop or graphical user interface (GUI) in a mobile phone.

[0239] It should be understood that in the embodiments of the present application, only the first position 211 and the second position 212 are located on the first side 301, and the third position 213 and the fourth position 214 are located on the third side 303 are used as examples for illustration. In actual production or design, the first position 211 and the fourth position 214 may also be located on adjacent sides, and the embodiments of the present application will not be repeated one by one.

[0240] In one embodiment, the ratio of the dimension of the floor 300 along the extension direction of the first side (the width of the foldable electronic device 100) when the foldable electronic device 100 is in the unfolded state to the dimension of the foldable electronic device 100 when the foldable electronic device 100 is in the folded state is greater than or equal to 1.8 and less than or equal to 2.2.

[0241] The foldable electronic device 100 may further include a first antenna 200 . The first antenna 200 includes a first radiator 231 , a first parasitic stub 241 , a first feeding circuit 230 , and a first switch 251 .

[0242] The first radiator 231 includes a conductive portion of the first frame 210 between the first position 211 and the second position 212. The first parasitic stub 241 includes a conductive portion of the first frame 210 between the third position 213 and the fourth position 214. At least a portion of the first radiator 231 is spaced apart from the floor 300. At least a portion of the first parasitic stub 241 is spaced apart from the floor 300.

[0243] The first radiator 231 includes a first feeding point 240. The first feeding circuit 230 is coupled to the first feeding point 240 to feed a radio frequency signal to the first antenna 200.

[0244] The first parasitic stub includes a first connection point 221 . The first switch 251 is coupled to the first connection point 221 .

[0245] The operating frequency band of the first antenna 200 includes a satellite communication frequency band. Satellite communication includes at least one of receiving and / or sending short messages (also known as short messages), making and / or receiving calls, and data services (such as Internet access).

[0246] In one embodiment, the satellite communication frequency band may include part of the frequency band in the Tiantong satellite system, and may include the transmit frequency band (1980MHz-2010MHz) and the receive frequency band (2170MHz-2200MHz) in the Tiantong satellite system. In one embodiment, the satellite communication frequency band may include part of the frequency band in the Beidou satellite system, and may include the transmit frequency band (1610MHz-1626.5MHz) and the receive frequency band (2483.5MHz-2500MHz) in the Beidou satellite system. In one embodiment, the satellite communication frequency band may include part of the frequency band in the low-orbit satellite system, and may include the transmit frequency band (1668MHz-1675MHz) and the receive frequency band (1518MHz-1525MHz) in the low-orbit satellite system. Alternatively, it may also be applied to other satellite communication systems, and the embodiments of the present application are not limited thereto.

[0247] In one embodiment, when the first antenna 200 operates in the Tiantong satellite system (the operating frequency band of the first antenna 200 includes at least part of the frequency band in the Tiantong satellite system), the foldable electronic device 100 can perform voice communication through the first antenna 200. In one embodiment, when the first antenna 200 operates in the Beidou satellite system (the operating frequency band of the first antenna 200 includes at least part of the frequency band in the Beidou satellite system), the foldable electronic device 100 can send or receive short messages and pictures through the first antenna 200. In one embodiment, when the first antenna 200 operates in a low-orbit satellite system (the operating frequency band of the first antenna 200 includes at least part of the frequency band in the low-orbit satellite system), the foldable electronic device 100 can perform voice communication, send or receive short messages and pictures, and access the Internet through the first antenna 200. The low-orbit satellite can have some functions similar to those of a base station.

[0248] It should be understood that when the foldable electronic device 100 performs satellite communication, it can communicate with the communication satellite through one antenna or multiple antennas in the foldable electronic device 100.

[0249] In one embodiment, when the foldable electronic device 100 performs satellite communication, it can communicate with a communication satellite via an antenna within the foldable electronic device 100. In this case, the antenna can be loaded with different electronic components at different time slots to adjust the resonant point frequency, thereby enabling the antenna to operate within the satellite system's transmit and receive frequency bands. In one embodiment, the first feed point 240 on the first radiator 231 receives a first RF signal fed by the first feed circuit 230. The first RF signal corresponds to the satellite system's transmit frequency band, and the first antenna 200 then operates within the satellite system's transmit frequency band to transmit signals to the communication satellite. In one embodiment, the first feed point 240 on the first radiator 231 receives a second RF signal fed by the first feed circuit 230. The second RF signal corresponds to the satellite system's receive frequency band, and the first antenna 200 then operates within the satellite system's receive frequency band to receive signals from the communication satellite. Typically, the first radiator 231 receives the first RF signal or the second RF signal by switching it through a switch coupled to the first feeding point 240. It should be understood that the first radiator can also be directly fed with the first RF signal or the second RF signal that is periodically switched. This application does not limit this.

[0250] In one embodiment, when the foldable electronic device 100 performs satellite communication, it can communicate with the communication satellite through multiple antennas in the foldable electronic device 100. In this case, the operating frequency bands of some of the multiple antennas may include the transmit frequency bands of the satellite system, and the operating frequency bands of other antennas may include the receive frequency bands of the satellite system.

[0251] When the foldable electronic device 100 is in the unfolded state, the first switch 251 is used to switch between the first directional pattern and the second directional pattern generated by the first antenna 200. The beam direction of the first directional pattern is different from the beam direction of the second directional pattern.

[0252] In the embodiments of the present application, when the foldable electronic device 100 is in the unfolded state, it can be understood that the angle between the first housing 201 and the second housing 202 of the foldable electronic device 100 is greater than or equal to 60° and less than or equal to 300°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angle between the first housing 201 and the second housing 202 is greater than or equal to 90° and less than or equal to 270°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angle between the first housing 201 and the second housing 202 is 180°. When the foldable electronic device 100 is a device that folds three or more times, as long as the angle between the first housing 201 and the second housing 202 is greater than or equal to 60° and less than or equal to 300°, the foldable electronic device 100 is considered to be in the unfolded state. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angle between adjacent housings of the foldable electronic device 100 is greater than or equal to 60° and less than or equal to 300°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angle between adjacent housings among the multiple housings of the foldable electronic device 100 is greater than or equal to 90° and less than or equal to 270°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angle between adjacent housings among the multiple housings of the foldable electronic device 100 is 180°.

[0253] It should be understood that the beam pointing direction can be understood as the main radiation direction of the beam generated by the first antenna 200.

[0254] In one embodiment, beam pointing may be understood to include the maximum radiation direction of a pattern, for example, the maximum radiation direction in the three-dimensional patterns shown in Figures 16 and 19. Different beam pointing includes different maximum radiation directions.

[0255] In one embodiment, beam pointing can be understood as a set of directions in which the gain value is located in the top 10% of continuous areas in a two-dimensional directional diagram (the directional diagram is composed of gain values ​​at various angles) and in an area where the gain is greater than or equal to a first threshold, for example, the darker areas in the two-dimensional directional diagrams shown in Figures 17, 20, and 26 (for example, the dark red areas shown in (b) in Figure 17 and (b) in Figure 20). Different beam pointings include that the continuous area formed in the first directional diagram does not overlap with the continuous area formed in the second directional diagram, or that they do not completely overlap. The first threshold can be determined based on actual production or design (for example, the capabilities of the satellite communication system, and the loss of the radio frequency link in the electronic device, etc.).

[0256] It should be understood that the antenna's maximum radiation direction is easier to display in a three-dimensional pattern, while the set of directions where the gain values ​​form a continuous region in the top 10% is easier to display in a two-dimensional pattern. Three-dimensional patterns and two-dimensional patterns can be converted into each other. Therefore, the maximum radiation direction or the set of directions where the gain values ​​form a continuous region in the top 10% can also be converted between two-dimensional and three-dimensional patterns.

[0257] In the embodiment of the present application, the continuous region can be understood as the gain within the region being greater than or equal to the first threshold, and there is no single angle where the gain is less than the first threshold. In one embodiment, the first threshold can be 4dBic, 6dBic, or 8dBic.

[0258] The determined unit length can be understood as the minimum span of the horizontal axis and the vertical axis in the two-dimensional radiation pattern. For example, it can be understood as the difference between two adjacent measurement points (or simulation points) when measuring (or simulating) the radiation pattern of the first antenna 200. In addition, the unit length of the horizontal axis and the unit length of the vertical axis can be the same or different. In one embodiment, the unit length of the horizontal axis and the unit length of the vertical axis can be the same. For example, the unit length of the horizontal axis and the unit length of the vertical axis can both be 10°, 5°, or 2°. In one embodiment, the unit length of the horizontal axis and the unit length of the vertical axis can be different. For example, the unit length of the horizontal axis is 10° and the unit length of the vertical axis is 5°, or the unit length of the horizontal axis is 5° and the unit length of the vertical axis is 2°.

[0259] In one embodiment, the first antenna 200 can be located at the top of the foldable electronic device 100, and the foldable electronic device 100 can be aligned with the communication satellite in the top direction (the direction from the bottom of the foldable electronic device 100 to the top). Therefore, in this embodiment of the application, only the directional diagram of the upper half of the coordinate axis (the region where z>0 in the coordinate axis shown in Figure 10) is used for description.

[0260] According to an embodiment of the present application, the first switch 251 can adjust the beam direction of the directional pattern generated by the first antenna 200 in different switch states. The first antenna 200 can switch between the first directional pattern and the second directional pattern generated by the first antenna 200 based on the relative position of the communication satellite and the foldable electronic device 100, ensuring that the communication satellite is always located in an area where the first antenna 200 has good radiation characteristics, thereby maintaining a staring state with the communication satellite, effectively improving the user experience.

[0261] It should be understood that in the embodiments of the present application, the first antenna 200 is described as being in the same operating state. The term "same operating state" can be understood to mean that the operating frequency band of the first antenna 200 can include either the first frequency band or the second frequency band, and the first antenna 200 can communicate in the same frequency band when the first switch 251 is coupled to different switch branches. The operating frequency band of the first antenna 200 can include either the first frequency band or the second frequency band.

[0262] In one embodiment, at the first time / time period, the resonance frequency band generated by the first radiator 231 includes a first frequency band, and the first frequency band may be a transmission frequency band in a satellite communication frequency band.

[0263] In one embodiment, at the first time / time period, the resonance frequency band generated by the first radiator 231 includes a second frequency band, and the second frequency band may be a receiving frequency band in a satellite communication frequency band.

[0264] In one embodiment, the first frequency band may be at least a portion of a frequency band between 1.5 GHz and 4.5 GHz. In one embodiment, the first antenna 200 operates in the Tiantong satellite system, and the first frequency band may be a transmit frequency band (1980 MHz-2010 MHz) therein. In one embodiment, the first antenna 200 operates in the Beidou satellite system, and the first frequency band may be a transmit frequency band (1610 MHz-1626.5 MHz) therein. In one embodiment, the first antenna 200 operates in a low-orbit satellite system (e.g., StarNet), and the first frequency band may be a transmit frequency band (1668 MHz-1675 MHz) therein.

[0265] In one embodiment, the second frequency band may be at least a portion of a frequency band between 1.5 GHz and 4.5 GHz. In one embodiment, the first antenna 200 operates in the Tiantong satellite system, and the second frequency band may be a receiving frequency band therein (2170 MHz-2200 MHz). In one embodiment, the first antenna 200 operates in the Beidou satellite system, and the second frequency band may be a receiving frequency band therein (2483.5 MHz-2500 MHz). In one embodiment, the second frequency band may be a receiving frequency band therein (1518 MHz-1525 MHz).

[0266] The first frequency band is a transmitting frequency band in the satellite communication frequency band (for example, the transmitting frequency band (1980MHz-2010MHz) in the Tiantong satellite system), and the first antenna 200 can switch the first directional pattern or the second directional pattern through the first switch 251 to transmit RF signals to the communication satellite.

[0267] The second frequency band is a receiving frequency band in the satellite communication frequency band (for example, the receiving frequency band (2170MHz-2200MHz) in the Tiantong satellite system), and the first antenna 200 can switch the first directional pattern or the second directional pattern through the first switch 251 to receive the radio frequency signal sent by the communication satellite.

[0268] When the foldable electronic device 100 uses the first antenna 200 as an antenna for transmitting and receiving with a communication satellite in different time slots, the operating frequency band of the first antenna 200 can include the transmitting frequency band (first frequency band) or receiving frequency band (second frequency band) of the satellite system in different time slots. In the corresponding time slot, the first antenna 200 can transmit a radio frequency signal to the communication satellite or receive a radio frequency signal sent by the communication satellite through the generated first directional pattern or second directional pattern. It can also be understood that when the first antenna 200 generates the first directional pattern or the second directional pattern, the operating frequency band of the first antenna covers the transmitting frequency band (first frequency band) in at least one satellite communication frequency band, or the receiving frequency band (second frequency band) in at least one satellite communication frequency band.

[0269] In one embodiment, when the foldable electronic device 100 is in the unfolded state and in the first switching state, the first antenna 200 generates a first radiation pattern. In one embodiment, it can be understood that the first radiator 231 and the first parasitic stub 241 are used to generate the first radiation pattern. The gain of the first region (the black region in the figure) in the first radiation pattern is greater than or equal to the first threshold, as shown in FIG11(a).

[0270] In one embodiment, the first region is a continuous region.

[0271] It should be understood that within the first region, there is no single angle whose gain is less than the first threshold. In one embodiment, the first threshold may be 4dBic, 6dBic, or 8dBic. It should be understood that in the directional diagram (e.g., a two-dimensional directional diagram) shown in the embodiment of the present application, the vertical axis is the angle Theta (θ) (e.g., the angle with the z-axis in the coordinate system provided in the embodiment of the present application) with the z-direction (top direction, for example, the direction from the bottom of the foldable electronic device 100 to the top of the foldable electronic device 100), and the horizontal axis is the angle Phi with the x-direction (the extension direction of the first side 301). (For example, in the coordinate system provided in the embodiments of the present application, the angle between the x-axis and the x-axis in the xoy plane).

[0272] When the foldable electronic device 100 is in the unfolded state and in the second switch state, the first antenna 200 generates a second radiation pattern. In one embodiment, it can be understood that the first radiator 231 and the first parasitic branch 241 are used to generate the second radiation pattern. The gain of the second region (the black region in the figure) in the second radiation pattern is greater than or equal to the first threshold, as shown in FIG11(b). In one embodiment, the second region is a continuous region.

[0273] The first region in the first directional image and the second region in the second directional image are combined into a third region (black region in the figure), as shown in (c) of Figure 11. In one embodiment, the third region is a continuous region.

[0274] The area S1 of the first region, the area S2 of the second region, and the area S3 of the third region satisfy: S3 ≥ S1 × 130%, and S3 ≥ S2 × 130%.

[0275] It should be understood that the area of ​​the above-mentioned region can be simply understood as the number of minimum rectangular grids (angles that meet the first threshold among all measured (or simulated) angles) composed of unit length of the horizontal axis and unit length of the vertical axis in the two-dimensional directional diagram.

[0276] It should be understood that the first area can be understood as when the foldable electronic device 100 is in the unfolded state and in the first switching state, when the communication satellite is located within the angle corresponding to the first area relative to the foldable electronic device 100, the first antenna 200 has good radiation characteristics, and the foldable electronic device 100 can maintain a star-pointing state with the communication satellite.

[0277] The second area can be understood as when the foldable electronic device 100 is in the unfolded state. In the second switching state, when the communication satellite is located within the angle corresponding to the second area relative to the foldable electronic device 100, the first antenna 200 has good radiation characteristics, and the foldable electronic device 100 can maintain a star-pointing state with the communication satellite.

[0278] Therefore, the first antenna 200 can adjust the directional pattern generated by the first antenna 200 by switching different switch states, so that the foldable electronic device 100 has good communication characteristics within a range of a larger angle (for example, 45°, 50°, 60°, or 70°) with the top direction (the direction from the bottom of the foldable electronic device 100 to the top, for example, the z direction) (for example, Theta (θ) in the third area is greater than 45°, 50°, 60°, or 70°). For example, when the user conducts satellite communication, the directional pattern generated by the first antenna 200 has good characteristics within a larger angle, and the communication satellite can move within a larger angle range without affecting the quality of satellite communication. The user does not need to frequently change the posture of holding the foldable electronic device 100, which effectively improves the user experience.

[0279] It should be understood that in the embodiment of the present application, the switch state can be understood as the electrical connection state of all switches related to the first antenna 200 in the foldable electronic device 100. Among them, the electrical connection state of the switch related to the first antenna 200 can be understood as that when the common port of the switch is electrically connected to different connection ports (different connection ports are connected to different switch branches), the radiation characteristics of the first antenna 200 (for example, the resonant point frequency of the resonance, the maximum radiation direction of the pattern, the radiation efficiency, etc.) will change.

[0280] In one embodiment, the angle between the second direction and the third direction is greater than or equal to 10° and less than or equal to 90°, wherein the second direction is the maximum radiation direction of the first directional pattern, and the third direction is the maximum radiation direction of the second directional pattern.

[0281] It should be understood that when the maximum radiation direction of the first radiation pattern and the maximum radiation direction of the second radiation pattern are offset toward both sides of the top direction (there is a larger angle between the second direction and the third direction), the width of the radiation beam of the first antenna 200 can be further widened, so that the first antenna 200 has good communication characteristics within a wider angle range (the angle with the top direction).

[0282] For simplicity, in the application embodiments, only the first switch state and the second switch state are used as examples for description. In actual production or application, the switch of the first antenna 200 can include multiple switch states (greater than or equal to three switch states). When multiple switch states are included (greater than or equal to three switch states), the angle between the second direction and the third direction is greater than or equal to 10° and less than or equal to 90°. This can be understood as the angle between the maximum radiation directions of the directional pattern generated by the first antenna 200 corresponding to any two switch states in the multiple switch states is greater than or equal to 10° and less than or equal to 90°.

[0283] In one embodiment, the first frame 210 defines a first insulating slit 271 at a first position 211 and is coupled to the floor 300 at a second position 212 . The second frame 220 defines a fourth insulating slit 274 at a fourth position 214 and is coupled to the floor 300 at a third position 213 .

[0284] It should be understood that there may be an insulating gap on the frame, and the conductor part of the frame between the two insulating gaps or the insulating gap and the grounding point serves as a radiator, thereby forming a frame antenna. Among them, when the frame is formed of a conductive material such as metal, the insulating gap can be understood as a gap opened in the frame filled with non-metallic material (insulating material). Moreover, the gap is visible on the exterior surface. When the outer surface of the frame is a non-conductive material, the insulating gap can be understood as a gap between the conductor parts in the frame, and the gap can be filled with non-metallic material (insulating material), or it can be filled with air without filling non-metallic material. Moreover, the gap is not visible on the exterior surface.

[0285] In one embodiment, the width of the first insulating gap 271 is greater than or equal to 0.2 mm and less than or equal to 2 mm. It should be understood that the widths of the gaps provided on the frame in the embodiments of the present application can all be within the above ranges. For the sake of brevity, these are not detailed here. The term "insulating gap width" should be understood as the dimension extending between two sections of conductive material (e.g., two radiators).

[0286] One end of the first radiator 231 and the first parasitic branch 241 is grounded, and the other end is open, so as to form a structure similar to an IFA. The first radiator 231 and the first parasitic branch 241 can operate in a quarter-wavelength mode.

[0287] In one embodiment, the first antenna 200 may further include a first switch branch 261 and a second switch branch 262 .

[0288] The first switch branch 261, the second switch branch 262, and the first switch 251 are coupled between the first connection point 221 and the floor 300, as shown in Figure 10. The first connection port of the first switch 251 is coupled to the first switch branch 261, and the second connection port of the first switch 251 is coupled to the second switch branch 262.

[0289] For ease of understanding, the first switch branch 261 and the second switch branch 262 can be considered to be connected in parallel. In one embodiment, the first switch branch 261 and the second switch branch 262 are connected in parallel between the floor 300 and the first switch 251. In one embodiment, the first switch branch 261 and the second switch branch 262 are connected in parallel between the first connection point 221 and the first switch 251.

[0290] It should be understood that the "first switch," "second switch," and "third switch" in this application may include one or more switching devices; and the "first connection point," "second connection point," and "third connection point" in this application may include one or more connection points. In one embodiment, the first switch branch 261 can be coupled between the floor 300 and the first radiator 231 (in the following embodiments, this can also be understood as coupling between two connection points on either side of the insulation gap) via a switching device in the first switch 251 and a connection point in the first connection point 221. The second switch branch 262 can be coupled between the floor 300 and the first radiator 231 via another switching device in the first switch 251 and another connection point in the first connection point 221. In this embodiment of the application, the switch is used only to switch between different switch branches coupled to the radiator / parasitic branch, and its specific location and form are not limited.

[0291] It should be understood that in the embodiment of the present application, the switch branch can be understood as a circuit between the switch and the connection point (for example, the first connection point 221) or the floor 300 (the floor 300 can also be replaced by another connection point, such as the second connection point 222 in the following embodiment), which can be switched to different switch branches by the switch, so that the equivalent capacitance, equivalent resistance or equivalent inductance coupled to the connection point is different.

[0292] In one embodiment, the switch branch may include one or more electronic components, and the multiple electronic components may be connected in series or in parallel to achieve different equivalent capacitance values ​​and / or equivalent inductance values ​​and / or equivalent resistance values. In one embodiment, the switch branch may also include a switch to switch the equivalent capacitance values ​​and / or equivalent inductance values ​​and / or equivalent resistance values ​​in different states of the switch branch.

[0293] In one embodiment, the switch branch may not include electronic components. The switch branch can be used to determine the boundary conditions at the first connection point (with the floor 300 or another connection point). For example, the switch branch is in an open circuit state, and when the switch common port is connected to the switch branch, the first connection point 221 is in an open circuit state (not coupled to the floor 300 or another connection point through a device). Alternatively, the switch branch is in a short circuit state, and when the switch common port is connected to the switch branch, the first connection point 221 is in a short circuit state (directly electrically connected to the floor 300 or another connection point, without other electronic components). For the sake of simplicity, in the electronic device 10 shown in Figure 6, only the first switch branch 261 including the first electronic component and the second switch branch 262 including the second electronic component are used as an example for explanation.

[0294] In one embodiment, the first switch state can be understood as the common port of the first switch 251 being coupled to the first connection port of the first switch 251. The first switch branch 261 is coupled to the first connection point 221 to generate the first radiation pattern through the first radiator 231, the first parasitic stub 241, and the first switch branch 261.

[0295] The second switch state can be understood as the common port of the first switch 251 being coupled to the second connection port of the first switch 251. The second switch branch 262 is coupled to the first connection point 221, and the first radiator 231, the first parasitic stub 241 and the second switch branch 262 generate the second radiation pattern.

[0296] In one embodiment, in the first switching state (the first switching branch 261 is coupled to the first connection point 221 ), the first radiator 231 is configured to generate a first resonance, and a resonant frequency band of the first resonance includes the first frequency band.

[0297] In one embodiment, in the first switching state (the first switching branch 261 is coupled to the first connection point 221 ), the first radiator 231 is configured to generate a first resonance, and the resonant frequency band of the first resonance includes the second frequency band.

[0298] It should be understood that in the embodiment of the present application, the resonant frequency band can be understood as the frequency range corresponding to the S parameter (for example, S11, S22) being less than or equal to the threshold (for example, -4dB, -6dB) in the simulation results of the S parameter.

[0299] In one embodiment, in the second switching state (the second switching branch 262 is coupled to the first connection point 221 ), the first radiator 231 is configured to generate a second resonance, and a resonant frequency band of the second resonance includes the first frequency band.

[0300] In one embodiment, in the second switching state (the second switching branch 262 is coupled to the first connection point 221 ), the first radiator 231 is configured to generate a second resonance, and the resonant frequency band of the second resonance includes the second frequency band.

[0301] It should be understood that the first antenna 200 may further include a tuning circuit. This tuning circuit is coupled to the first radiator 231 and is configured to adjust the resonant frequency of the resonance generated by the first radiator 231 so that the resonant frequency range of the first resonance and the resonant frequency range of the second resonance include the first frequency range or the second frequency range, thereby enabling the first antenna 200 to operate in the first frequency range and the second frequency range in different time slots. In one embodiment, the tuning circuit may include another switch branch coupled to the first connection point via the first switch 251. This switch branch is configured to adjust the resonant frequency of the resonance generated by the first radiator 231 so that the resonant frequency range of the first resonance and the resonant frequency range of the second resonance include the first frequency range or the second frequency range. In one embodiment, the tuning circuit may include a first switch branch 261 and a second switch branch 262. The first switch branch 261 and the second switch branch 262 may be configured to enable the resonant frequency range of the first resonance generated by the first radiator 231 to include the first frequency range. Other switch branches may be configured to enable the resonant frequency range of the first resonance and the resonant frequency range of the second resonance generated by the first radiator 231 to include the second frequency range. For the sake of simplicity, in the embodiments of the present application, only the example of an antenna operating in a single frequency band is used for illustration.

[0302] In one embodiment, in the first switching state (first switch branch 261 coupled to first connection point 221), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is configured to generate a first main resonance, and the first parasitic branch 241 is configured to generate a first parasitic resonance, wherein the resonant frequency of the first parasitic resonance is higher than the resonant frequency of the first main resonance. In one embodiment, the first main resonance and the first parasitic resonance together form the aforementioned first resonance (because the resonant frequency difference between the first parasitic resonance and the first main resonance is small, in the S-parameter graph, the first main resonance and the first parasitic resonance are merged into one resonance).

[0303] When the resonant frequency of the first parasitic resonance is higher than the resonant frequency of the first resonance, a strong electric field can be excited near the first parasitic stub 241. Furthermore, because the beam of the directional pattern generated by the first parasitic stub 241 (without the first radiator 231, only the first parasitic stub 241 is excited) is directed toward the first radiator 231, the first directional pattern generated by the antenna is biased toward the first radiator 231.

[0304] In one embodiment, in the first switching state (the first switching branch 261 is coupled to the first connection point 221), the resonance point of the first parasitic resonance is within the resonance frequency band of the first main resonance. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0305] When the resonant frequency of the first parasitic resonance is lower than the resonant frequency of the first resonance, no electric field is excited near the first parasitic branch 241, and the electric field excited by the first radiator 231 is dominant. When the foldable electronic device 100 is unfolded, the beam pattern generated by the antenna points toward the first parasitic branch 241.

[0306] At the same time, in an embodiment of the present application, the coupling between the first radiator 231 and the first parasitic branch 241 is weak, and the first parasitic resonance cannot be well excited. Therefore, the pit corresponding to the first parasitic resonance does not appear clearly in the S-parameter diagram. However, since the first parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the first frequency point, the first frequency point can be considered to correspond to the resonance point of the above-mentioned first parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0307] In one embodiment, in the second switching state (second switch branch 262 coupled to first connection point 221), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is configured to generate a second main resonance, and the first parasitic branch 241 is configured to generate a second parasitic resonance, wherein the resonant frequency of the second parasitic resonance is lower than the resonant frequency of the second main resonance. In one embodiment, the second main resonance and the second parasitic resonance jointly form the aforementioned second resonance (due to a small frequency difference between the resonant points of the second parasitic resonance and the second main resonance, the second main resonance and the second parasitic resonance are merged into one resonance in the S-parameter diagram).

[0308] When the resonant frequency of the second parasitic resonance is lower than the resonant frequency of the second resonance, no electric field is excited near the first parasitic branch 241, and the electric field excited by the first radiator 231 is dominant. When the foldable electronic device 100 is unfolded, the beam of the second directional pattern generated by the antenna is directed toward the first parasitic branch 241.

[0309] In one embodiment, in the second switching state (the second switching branch 262 is coupled to the first connection point 221), the resonance point of the second parasitic resonance is located within the resonance frequency band of the second main resonance. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0310] At the same time, in an embodiment of the present application, the coupling between the first radiator 231 and the first parasitic branch 241 is weak, and the second parasitic resonance cannot be well excited. Therefore, the pit corresponding to the second parasitic resonance does not appear clearly in the S-parameter diagram. However, since the second parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the second frequency point, the second frequency point can be considered to correspond to the resonance point of the above-mentioned second parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0311] In one embodiment, the distance between the second position 212 and the center of the first rotation axis 203 in the first direction is less than or equal to 20 mm, and / or the distance between the third position 213 and the center of the first rotation axis 203 in the first direction is less than or equal to 20 mm.

[0312] In one embodiment, the center of the first rotating shaft 203 can be understood as the center of the end surface of the first rotating shaft 203 between the first side 301 and the third side 303, and the distance between the center and the first side 301 is the same as the distance between the center and the third side 303.

[0313] It should be understood that when the second position 212 and / or the third position 213 is close to the first rotation axis 203 , the coupling between the first radiator 231 and the first parasitic stub 241 can be increased, thereby better exciting the first parasitic stub 241 .

[0314] FIG12 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0315] As shown in FIG12 , the first parasitic stub 241 further includes a fourth connection point 224 . The first parasitic stub 241 defines a fifth insulating gap 275 between the first connection point 221 and the fourth connection point 224 .

[0316] The first switch branch 261, the second switch branch 262, and the first switch 251 are coupled to the first connection point 221 and the fourth connection point 224. The first connection port of the first switch 251 is coupled to the first switch branch 261, and the second connection port of the first switch 251 is coupled to the second switch branch 262.

[0317] It should be understood that the first switch branch 261 and the second switch branch 262 are arranged in parallel. In one embodiment, the first switch branch 261 and the second switch branch 262 are connected in parallel between the fourth connection point 224 and the first switch 251. In one embodiment, the first switch branch 261 and the second switch branch 262 are connected in parallel between the first connection point 221 and the first switch 251.

[0318] A fifth insulating gap 275 is opened on the first parasitic branch 241. The fifth insulating gap 275 can be regarded as an equivalent capacitance (for example, a distributed capacitance) set on the first parasitic branch 241. The equivalent capacitance can make the first parasitic branch 241 form a metamaterial (meta material, which can be referred to as meta) structure. The first parasitic branch 241 with the metamaterial structure can increase the radiation aperture, and the electric field is more dispersed after the fifth insulating gap 275 is opened. In one embodiment, the dielectric loss near the first parasitic branch forming the metamaterial structure is reduced, so the system efficiency and radiation efficiency of the first antenna 200 can be effectively improved. By coupling the first switch 251 connected between the first connection point 221 and the fourth connection point 224 (switching the switch branch coupled between the first connection point 221 and the fourth connection point 224), the equivalent capacitance value of the fifth insulating gap 275 can be adjusted, thereby adjusting the radiation characteristics of the first antenna 200 (for example, the resonance point frequency of the first parasitic resonance generated by the first parasitic branch 241).

[0319] It should be understood that the only difference between the first antenna 200 shown in FIG12 and the first antenna 200 shown in FIG10 is the fourth connection point 224 and the fifth insulating gap 275 provided between the fourth connection point 224 and the first connection point 221. In the first antenna 200 shown in FIG10, the first parasitic branches 241 are all structures similar to IFAs, with one end being grounded and the other end being open, and the first parasitic branches 241 all operate in a quarter-wavelength mode. However, in the first antenna 200 shown in FIG12, the first parasitic branches 241 are all structures with one end being grounded and the other end being open, and the fifth insulating gap 275 is provided on the first parasitic branches 241 to form a metamaterial structure. The length of the first parasitic branches 241 is greater than the length of the first parasitic branches 241 shown in FIG10.

[0320] In one embodiment, in the first antenna 200 shown in FIG10 , the electrical length of the first parasitic stub 241 is one-quarter of the first wavelength, and the first wavelength may be the wavelength corresponding to the parasitic resonance generated by the first parasitic stub 241. In one embodiment, in the first antenna 200 shown in FIG12 , the electrical length of the first parasitic stub 241 is greater than three-eighths of the first wavelength. In the first antenna 200 shown in FIG12 , the first parasitic resonance generated by the first parasitic stub 241 may correspond to a quarter-wavelength mode. The fifth insulating gap 275 may increase the electrical length of the first parasitic stub 241 to greater than three-eighths of the first wavelength, and the current on the first parasitic stub 241 is in the same direction (e.g., not in reverse direction), and the electric field between the first parasitic stub 241 and the ground does not reverse direction. The electrical length of the first parasitic stub 241 increases from one-quarter of the first wavelength to more than three-eighths of the first wavelength, while still operating in the quarter-wavelength mode. In this case, the current density on the first parasitic branch 241 is dispersed, and the electric field density between the first parasitic branch 241 and the floor 300 is weakened. This reduces the conductor loss and dielectric loss caused by the first parasitic branch 241 and the conductors and dielectrics disposed around the first parasitic branch 241, thereby improving the radiation characteristics of the first antenna 200. The first parasitic branch 241 increases the radiation aperture, effectively improving the system efficiency and radiation efficiency of the first antenna 200.

[0321] The first wavelength can be understood as the vacuum wavelength corresponding to the resonance point of the parasitic resonance generated by the first parasitic branch 241, or can also be understood as the vacuum wavelength corresponding to the center frequency of the resonant frequency band formed by the parasitic resonance generated by the first parasitic branch 241. Since there is a certain correspondence between the vacuum wavelength and the medium wavelength, the above ratio can be converted to the medium wavelength, and this application will not elaborate on it one by one.

[0322] In one embodiment, the length of the first parasitic branch 241 between the first end of the first parasitic branch 241 (the ground end, one end at the third position 213) and the fifth insulating gap 275 is less than the length of the first parasitic branch 241 between the second end of the first parasitic branch 241 (the open end, one end at the fourth position 214) and the fifth insulating gap 275.

[0323] It should be understood that the length of the radiator between one end of the first parasitic branch 241 and the fifth insulating gap 275 can be understood as the length of the conductor part between the end of the end and the fifth insulating gap 275. For the sake of simplicity of discussion, it can be understood accordingly in the embodiments of the present application.

[0324] In one embodiment, the length of the first parasitic branch 241 between the first end (the ground end, the end at the third position 213) of the first parasitic branch 241 and the fifth insulating gap 275 is less than three-fifths of the length of the first parasitic branch 241 between the second end (the open end, the end at the fourth position 214) of the first parasitic branch 241 and the fifth insulating gap 275.

[0325] In one embodiment, the length of the first parasitic branch 241 between the first end of the first parasitic branch 241 (the ground end, the end at the third position 213) and the fifth insulating gap 275 is less than one-third of the length of the first parasitic branch 241 between the second end of the first parasitic branch 241 (the open end, the end at the fourth position 214) and the fifth insulating gap 275.

[0326] In one embodiment, the length of the first parasitic branch 241 between the first end (the ground end, the end at the third position 213) of the first parasitic branch 241 and the fifth insulating gap 275 is less than one-seventh of the length of the first parasitic branch 241 between the second end (the open end, the end at the fourth position 214) of the first parasitic branch 241 and the fifth insulating gap 275.

[0327] It should be understood that the fifth insulating slot 275 can be located in a region of the first parasitic branch 241 where current is relatively high. The region of relatively high current should be understood as referring to the first parasitic branch 241 without slots (e.g., operating in a quarter-wavelength mode). When the fifth insulating slot 275 is opened, the electric field strength of the first parasitic branch 241 is weakened, achieving the effect of dispersing the electric field, thereby improving the system efficiency and radiation efficiency of the first antenna 200.

[0328] In one embodiment, the first switch branch 261 and the second switch branch 262 may include capacitors or switch branches equivalent to capacitors.

[0329] In one embodiment, the equivalent capacitance value of the first switch branch 261 and the equivalent capacitance value of the second switch branch 262 can be less than or equal to a first threshold value. The first threshold value can be designed based on the resonant frequency of the parasitic resonance generated by the first parasitic branch 241. When the resonant frequency of the parasitic resonance is less than or equal to 1 GHz, the first threshold value is 10 pF. When the resonant frequency of the parasitic resonance is greater than 1 GHz, the first threshold value is 2 pF.

[0330] In one embodiment, the first switch branch 261 and the second switch branch 262 may include an inductor or a switch branch equivalent to an inductor.

[0331] In one embodiment, the equivalent inductance of the first switch branch 261 and the equivalent inductance of the second switch branch 262 may be less than or equal to 10 nH.

[0332] It should be understood that by designing the equivalent capacitance value or equivalent inductance value of the first switch branch 261 and the equivalent capacitance value or equivalent inductance value of the second switch branch 262 according to the frequency of the resonance point of different parasitic resonances, the current distribution on the first parasitic branch 241 can be made more dispersed, the conductor loss can be reduced, and the radiation aperture of the first parasitic branch 241 can be increased, thereby improving the radiation characteristics of the antenna (for example, radiation efficiency and system efficiency).

[0333] In one embodiment, the distance between the first connection point 221 and / or the fourth connection point 224 and the fifth insulation gap 275 is less than or equal to 5 mm.

[0334] The distance between the first connection point 221 and / or the fourth connection point 224 and the fifth insulating gap 275 can be understood as the minimum distance between the conductors on both sides of the first connection point 221 and / or the fourth connection point 224 and the fifth insulating gap 275 (the length of the first parasitic stub 241 between the first connection point 221 and / or the fourth connection point 224 and the fifth insulating gap 275). When electrically connected to the first connection point 221 and / or the fourth connection point 224 via a connector (e.g., a metal spring), the distance to the fifth insulating gap 275 can be understood as the minimum distance between the center of the portion of the connector in contact with the connection point and the conductors on both sides of the fifth insulating gap 275.

[0335] In one embodiment, the first parasitic stub 241 may further include a seventh connection point 227 . The first antenna 200 further includes a third switch 253 , a third switch branch 263 , and a fourth switch branch 264 .

[0336] The third switch branch 263, the fourth switch branch 264, and the third switch 253 are coupled between the seventh connection point 227 and the floor 300, as shown in Figure 12. The first connection port of the third switch 253 is coupled to the third switch branch 263, and the second connection port of the third switch 253 is coupled to the fourth switch branch 264.

[0337] It should be understood that the third switch branch 263 and the fourth switch branch 264 are arranged in parallel. In one embodiment, the third switch branch 263 and the fourth switch branch 264 are connected in parallel between the floor 300 and the third switch 253. In one embodiment, the third switch branch 263 and the fourth switch branch 264 are connected in parallel between the seventh connection point 227 and the third switch 253. In the embodiments of the present application, the switches are used only as switch branches for switching coupling with parasitic stubs / radiators, and their specific locations are not limited.

[0338] The first switching state can be understood as the common port of the first switch 251 being coupled to the first connection port of the first switch 251, and the common port of the third switch 253 being coupled to the first connection port of the third switch 253. The first switch branch 261 is coupled to the first connection point 221 (the first switch branch 261 is coupled between the first connection point 221 and the fourth connection point 224), and the third switch branch 263 is coupled to the seventh connection point 227. The first radiator 231, the first parasitic stub 241, the first switch branch 261, and the third switch branch 263 generate the first directivity pattern.

[0339] The second switching state can be understood as the common port of the first switch 251 being coupled to the second connection port of the first switch 251, and the common port of the third switch 253 being coupled to the second connection port of the third switch 253. The second switch branch 262 is coupled to the first connection point 221 (the second switch branch 262 is coupled between the first connection point 221 and the fourth connection point 224), and the fourth switch branch 264 is coupled to the seventh connection point 227. The second directional pattern described above is generated by the first radiator 231, the first parasitic stub 241, the second switch branch 262, and the fourth switch branch 264.

[0340] The first parasitic branch 241 is electrically connected to the floor 300 at the seventh connection point 227 via the third switch branch 263 or the fourth switch branch 264. This allows the current on the first parasitic branch 241 to be shunted in the area near the seventh connection point 227 when the first parasitic branch 241 generates parasitic resonance. Since the current is shunted in the area near the seventh connection point 227, the current density on the first parasitic branch 241 can be dispersed. In one embodiment, the current distribution on the first parasitic branch 241 is relatively more dispersed, thereby reducing the conductor loss of the first parasitic branch 241. In one embodiment, the current distribution on the first parasitic branch 241 is relatively more dispersed, which can increase the radiation aperture of the first parasitic branch 241. Since the conductor loss of the first parasitic branch 241 is reduced and the radiation aperture is increased, the system efficiency and radiation efficiency of the antenna can be improved.

[0341] In one embodiment, the distance between the seventh connection point 227 and the first connection point 221 and / or the fourth connection point 224 (e.g., the length of the first parasitic branch 241 between the seventh connection point 227 and the first connection point 221 and / or the fourth connection point 224) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0342] It should be understood that when the distance between the seventh connection point 227 and the first connection point 221 and / or the fourth connection point 224 is equal to 0 mm, the seventh connection point 227 coincides with the first connection point 221 and / or the fourth connection point 224 .

[0343] In one embodiment, the length of the first parasitic branch 241 between the first end of the first parasitic branch 241 (the ground end, one end at the third position 213) and the fifth insulating gap 275 is less than the length of the first parasitic branch 241 between the second end of the first parasitic branch 241 (the open end, one end at the fourth position 214) and the fifth insulating gap 275.

[0344] It should be understood that the length of the radiator between one end of the first parasitic branch 241 and the fifth insulating gap 275 can be understood as the length of the conductor part between the end of the end and the fifth insulating gap 275. For the sake of simplicity of discussion, it can be understood accordingly in the embodiments of the present application.

[0345] In one embodiment, the length of the first parasitic branch 241 between the first end (the ground end, the end at the third position 213) of the first parasitic branch 241 and the fifth insulating gap 275 is less than three-fifths of the length of the first parasitic branch 241 between the second end (the open end, the end at the fourth position 214) of the first parasitic branch 241 and the fifth insulating gap 275.

[0346] In one embodiment, the length of the first parasitic branch 241 between the first end of the first parasitic branch 241 (the ground end, the end at the third position 213) and the fifth insulating gap 275 is less than one-third of the length of the first parasitic branch 241 between the second end of the first parasitic branch 241 (the open end, the end at the fourth position 214) and the fifth insulating gap 275.

[0347] In one embodiment, the length of the first parasitic branch 241 between the first end (the ground end, the end at the third position 213) of the first parasitic branch 241 and the fifth insulating gap 275 is less than one-seventh of the length of the first parasitic branch 241 between the second end (the open end, the end at the fourth position 214) of the first parasitic branch 241 and the fifth insulating gap 275.

[0348] It should be understood that the fifth insulating slot 275 can be located in a region of the first parasitic branch 241 where current is relatively high. The region of relatively high current should be understood as referring to the first parasitic branch 241 without slots (e.g., operating in a quarter-wavelength mode). When the fifth insulating slot 275 is opened, the electric field strength of the first parasitic branch 241 is weakened, achieving the effect of dispersing the electric field, thereby improving the system efficiency and radiation efficiency of the first antenna 200.

[0349] In one embodiment, the first radiator 231 may further include a second connection point 222 and a third connection point 223. The first radiator 231 may define a second insulating gap 272 between the second connection point 222 and the third connection point 223, as shown in FIG13. In one embodiment, an electronic component may be coupled between the second connection point 222 and the third connection point 223.

[0350] It should be understood that the first radiator 231 may also form a similar metamaterial structure, wherein the connection points and switch branches may refer to the above embodiments, and for the sake of brevity, they are not described one by one.

[0351] For the sake of simplicity, the parts of the first antenna 200 shown in Figures 12 and 13 that are similar to the first antenna 200 shown in Figure 10 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the relationship between the parasitic resonance generated by the first parasitic branch 241 and the main resonance generated by the first radiator 231; the position of the first feeding point 240; the combination of the first area in the first radiation pattern and the second area in the second radiation pattern into a continuous third area, and the relationship between the various areas; the distance between the second position 212 and / or the third position 213 and the first rotation axis 203; and so on.

[0352] FIG. 14 shows the radiation efficiency and system efficiency of the first antenna 200 in the foldable electronic device 100 shown in FIG. 13 .

[0353] It should be understood that the coupling between the first radiator and the first parasitic stub is weak, and thus the parasitic resonance generated by the first parasitic stub cannot be effectively excited. Therefore, the S-parameter graph does not clearly show a pit corresponding to the parasitic resonance generated by the first parasitic stub. However, because the parasitic resonance generated by the first parasitic stub is excited by a portion of the current, a clear pit appears in the efficiency curve (e.g., radiation efficiency or system efficiency).

[0354] For the sake of simplicity, the following is an example in which the resonance point frequency of the resonance generated by the first radiator is 2.2 GHz and the equivalent capacitance values ​​of the switch branches coupled between the first connection point and the second connection point are 0.5 pF, 0.6 pF and 0.7 pF respectively.

[0355] As shown in FIG14 , when the equivalent capacitance values ​​of the switch branch coupled between the first connection point and the second connection point are 0.5 pF, 0.6 pF, and 0.7 pF, respectively, radiation efficiency pits may be generated before and after the resonance point of the resonance generated by the first radiator.

[0356] The equivalent capacitance of the switch branch coupled between the first connection point and the second connection point is 0.5 pF, and the radiation efficiency dip is located near 2.28 GHz. The equivalent capacitance of the switch branch coupled between the first connection point and the second connection point is 0.6 pF, and the radiation efficiency dip is located near 2.15 GHz. The equivalent capacitance of the switch branch coupled between the first connection point and the second connection point is 0.5 pF, and the radiation efficiency dip is located near 2.1 GHz.

[0357] Therefore, by switching the equivalent capacitance value of the switch branch coupled between the first connection point and the second connection point, the resonance point frequency of the parasitic resonance generated by the first parasitic branch can be adjusted.

[0358] Figures 15 to 19 illustrate the electric field distribution and radiation pattern of the first antenna 200 in the foldable electronic device 100 shown in Figure 13 at 2.2 GHz. Figure 15 illustrates the electric field distribution of the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the first switching state. Figure 16 illustrates the first radiation pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the first switching state. Figure 17 illustrates the first radiation pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the first switching state. Figure 18 illustrates the electric field distribution of the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the second switching state. Figure 19 illustrates the second radiation pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the second switching state. Figure 20 illustrates the second radiation pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 13 in the second switching state.

[0359] In the first switching state (the first switching branch is coupled to the first connection point), the resonant frequency of the parasitic resonance generated by the first parasitic stub 241 is higher than the resonant frequency (2.2 GHz) of the resonance generated by the first radiator 231. As shown in FIG15 , when the resonant frequency of the parasitic resonance generated by the first parasitic stub 241 is higher than the resonant frequency of the resonance generated by the first radiator 231, a strong electric field can be excited near the first parasitic stub 241.

[0360] At the same time, since the beam of the directional pattern generated by the first parasitic branch 241 (the first radiator 231 is not set, only the first parasitic branch 241 is excited) is directed toward the side of the first radiator 231, the directional pattern generated by the first antenna is biased toward the side of the first radiator 231, as shown in Figure 16.

[0361] The first antenna in Phi Good radiation characteristics (for example, gain) are achieved within the ranges of greater than 0° and less than 150° and greater than 270° and less than 360°, as shown in FIG17 .

[0362] In the second switching state (the second switching branch is coupled to the first connection point), the resonant frequency of the parasitic resonance generated by the first parasitic stub 241 is lower than the resonant frequency (2.2 GHz) of the resonance generated by the first radiator 231. As shown in FIG18 , when the resonant frequency of the parasitic resonance generated by the first parasitic stub is lower than the resonant frequency of the resonance generated by the first radiator 231, no electric field is excited near the first parasitic stub 241, and the electric field excited by the first radiator 231 is dominant.

[0363] When the foldable electronic device 100 is in the unfolded state, the beam of the directional pattern generated by the antenna points toward the first parasitic branch 241 side. Therefore, the second directional pattern of the antenna is biased toward the first parasitic branch 241 side, as shown in FIG19 .

[0364] The first antenna in Phi Good radiation characteristics (eg, gain) are achieved within a range greater than 100° and less than 275°, as shown in FIG20 .

[0365] FIG21 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0366] As shown in FIG. 21 , the first frame 210 defines a first insulating gap 271 at a first position 211 and a third insulating gap 273 at a second position 212 .

[0367] It should be understood that the only difference between the first antenna 200 shown in FIG21 and the first antenna 200 shown in FIG10 , FIG12 , and FIG13 is the third insulating gap 273. In the first antenna 200 shown in FIG10 , FIG12 , and FIG13 , the first radiator 231 has a grounded end and an open end, and the first radiator 231 operates in a quarter-wavelength mode. However, in the first antenna 200 shown in FIG21 , both ends of the first radiator 231 are open, forming a dipole-like antenna structure, and the first radiator 231 operates in a half-wavelength mode.

[0368] Because both ends of the first radiator 231 are open, the first resonance and second resonance generated by the first radiator 231 in the first switching state and the second switching state are generated by the linear DM mode described in the above embodiment. Since the current generated by the linear DM mode is primarily generated by the first radiator 231 and is primarily concentrated on the first radiator 231, multiple current modes are not generated on the floor 300, making it easier to determine the maximum radiation direction of the directional pattern generated by the first antenna 200.

[0369] Furthermore, the linear CM mode can excite the transverse modes of the floor (which account for more than the longitudinal modes), but the currents corresponding to the transverse modes in the floor cancel each other out. Therefore, the system efficiency and radiation efficiency of the linear CM mode are low. In contrast, the linear DM mode, where the antenna radiation is primarily generated by the radiator, has better system efficiency and radiation efficiency than the linear CM mode.

[0370] It should be understood that in the embodiments of the present application, the first radiator 231 can be a structure similar to a dipole antenna with both ends open, or a structure similar to an IFA or metamaterial with one end open and the other end grounded, and the embodiments of the present application do not limit this. Correspondingly, in the above embodiments, the first parasitic branch 241 is described only by taking a structure similar to an IFA or metamaterial with one end open and the other end grounded as an example. The first parasitic branch 241 can also be a structure similar to a dipole antenna with both ends open. For the sake of brevity, the embodiments of the present application will not be repeated one by one.

[0371] In one embodiment, the first radiator 231 may also include a grounding point, and the first frame 210 is coupled to the floor 300 at the grounding point, which can be used to generate new resonance from the linear CM mode in the above embodiment to improve the radiation performance of the first antenna 200 (for example, radiation efficiency, etc.).

[0372] In one embodiment, the first frame 210 may further include a fifth position 215. The first frame 210 is coupled to the floor 300 at the fifth position 215. The second position 212 is located between the first position 211 and the fifth position 215. The fifth position 215 is closer to the first rotation axis 203 than the second position in the first direction.

[0373] In one embodiment, the first antenna 200 may further include a second parasitic stub 242 . The second parasitic stub 242 includes a conductor portion of the first frame 210 between the second position 212 and the fifth position 215 .

[0374] It should be understood that the parasitic resonance generated by the second parasitic branch 242 may be close to the resonance generated by the first radiator 231 , so as to improve the radiation characteristics (eg, bandwidth, radiation efficiency, etc.) of the first antenna 200 .

[0375] In one embodiment, the distance between the fifth position 215 and the center of the first rotation axis 203 in the first direction is less than or equal to 20 mm.

[0376] It should be understood that when the fifth position 215 is close to the first rotation axis 203 , the coupling between the first radiator 231 and the first parasitic stub 241 can be increased, thereby better exciting the first parasitic stub 241 .

[0377] In one embodiment, the fifth position 215 is located at the second side 302 of the first frame 210, as shown in FIG22 . The first position 211 is located between the fifth position 215 and the second position 212. The first frame 210 defines an insulating gap at the fifth position 215. The first frame 210 may include a ninth position 219 between the fifth position 215 and the first position 211. The first frame 210 is coupled to the floor 300 at the ninth position 219. The second parasitic stub 242 includes a conductor portion of the first frame 210 between the fifth position 215 and the ninth position 219.

[0378] It should be understood that when the foldable electronic device 100 is in the unfolded state, the current on the first radiator 231 and the current on the second parasitic branch 242 are in the same direction (for example, clockwise or counterclockwise), which can form an effect similar to a current array, which can be used to improve the gain of the first antenna 200.

[0379] In one embodiment, the resonant frequency of the parasitic resonance generated by the second parasitic stub 242 is lower than the resonant frequency of the resonance generated by the first radiator 231. In one embodiment, the frequency difference between the resonant frequency of the parasitic resonance and the resonant frequency of the first resonance / second resonance is less than or equal to 200 MHz. In one embodiment, the frequency difference between the resonant frequency of the parasitic resonance and the resonant frequency of the first resonance / second resonance is greater than or equal to 50 MHz.

[0380] It should be understood that when the frequency difference between the resonance point frequency of the parasitic resonance generated by the second parasitic stub 242 and the resonance point frequency of the resonance generated by the first radiator 231 is within the above range, the first antenna 200 has better radiation characteristics (eg, gain).

[0381] In one embodiment, the first antenna 200 may further include a fourth parasitic stub 244 . The fourth parasitic stub 244 includes a conductor portion of the first frame 210 between the first position 211 and the ninth position 219 .

[0382] It should be understood that when the foldable electronic device 100 is in the unfolded state, the fourth parasitic branch 244 can be used to draw the current flowing to the second parasitic branch 242, control the coupling amount between the first radiator 231 and the second parasitic branch 242, and thus adjust the radiation characteristics of the second parasitic branch 242.

[0383] In one embodiment, the resonant frequency of the parasitic resonance generated by the fourth parasitic branch 244 is greater than the resonant frequency of the resonance generated by the first radiator 231. In one embodiment, the frequency difference between the resonant frequency of the parasitic resonance and the resonant frequency of the first resonance / second resonance is greater than or equal to 200 MHz.

[0384] It should be understood that when the resonance point of the parasitic resonance is located in the resonance frequency band of the first resonance / second resonance, the radiation efficiency in the resonance frequency band of the first resonance / second resonance will be depressed, thereby reducing the radiation characteristics of the first antenna 200.

[0385] For the sake of simplicity, the parts of the first antenna 200 shown in Figures 21 and 22 that are similar to the first antenna 200 shown in Figures 10, 12, and 13 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam pointing generated by the first radiator 231 in the first switching state and the second switching state; the relationship between the parasitic resonance generated by the first parasitic branch 241 and the main resonance generated by the first radiator 231; the position of the first feeding point 240; the first area in the first radiation pattern and the second area in the second radiation pattern are combined into a continuous third area, and the relationship between the various areas; etc.

[0386] FIG23 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0387] It should be understood that in the above embodiments, only the foldable electronic device 100 including only two housings (e.g., a two-fold electronic device) is used as an example for description. In actual production or design, the technical solutions provided in the embodiments of the present application can also be applied to devices including multiple housings (e.g., a multi-fold electronic device). As shown in Figure 23, only the foldable electronic device 100 including three housings is used for description.

[0388] As shown in Figure 23, the foldable electronic device 100 may further include a third housing 204 and a second shaft 205. The second shaft 205 is located between the second housing 202 and the third housing 204, and is rotatably connected to the second housing 202 and the third housing 204, respectively, so that the second housing 202 and the third housing 204 can rotate relative to each other.

[0389] It should be understood that the only difference between the foldable electronic device 100 shown in FIG. 23 and the foldable electronic device 100 shown in FIG. 21 is the third shell 204 and the second hinge 205 .

[0390] In the embodiment of the present application, the foldable electronic device 100 is in the unfolded state, which can be understood as the angle between the first shell 201 and the second shell 202 of the foldable electronic device 100 is greater than or equal to 60° and less than or equal to 300°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angles between adjacent shells among the multiple shells of the foldable electronic device 100 are all greater than or equal to 60° and less than or equal to 300°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angles between adjacent shells among the multiple shells of the foldable electronic device 100 are all greater than or equal to 90° and less than or equal to 270°. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the angles between adjacent shells among the multiple shells of the foldable electronic device 100 are all greater than or equal to 180°.

[0391] In one embodiment, the foldable electronic device 100 is in an unfolded state. In a first switching state (the first switching branch is coupled to the first connection point), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is used to generate a first main resonance, and the first parasitic branch 241 is used to generate a first parasitic resonance. The resonance point frequency of the first parasitic resonance is higher than the resonance point frequency of the first main resonance. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 225 MHz and greater than or equal to 75 MHz.

[0392] In one embodiment, the foldable electronic device 100 is in the unfolded state. In the second switching state (the second switch branch is coupled to the first connection point), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is used to generate a second main resonance, and the first parasitic branch 241 is used to generate a second parasitic resonance. The resonance point frequency of the second parasitic resonance is lower than the resonance point frequency of the second main resonance. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 225 MHz and greater than or equal to 75 MHz.

[0393] In one embodiment, the foldable electronic device 100 is in a closed state, the fifth insulating gap 275 is aligned with the second insulating gap 272 , and / or the first insulating gap 271 is aligned with the fourth insulating gap 274 .

[0394] It should be understood that the above alignment can be understood as the foldable electronic device 100 being in a closed state and at least partially overlapping along a direction perpendicular to the thickness of the foldable electronic device 100 (for example, in an unfolded state, a direction perpendicular to the display screen).

[0395] For the sake of simplicity, the parts of the first antenna 200 shown in Figure 23 that are similar to those of the first antenna 200 shown in Figure 21 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the position of the second parasitic branch; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the position of the first feeding point 240; the synthesis of the first area in the first radiation pattern and the second area in the second radiation pattern into a continuous third area, and the relationship between the various areas; etc.

[0396] Figures 24 and 25 are simulation results of the first antenna 200 in the foldable electronic device 100 shown in Figure 23. Figure 24 shows the S parameters of the first antenna 200 in the foldable electronic device 100 shown in Figure 23. Figure 25 shows the simulation result of the radiation efficiency of the first antenna 200 in the foldable electronic device 100 shown in Figure 23.

[0397] It should be understood that for the sake of simplicity, the resonance point frequency of the resonance generated by the first radiator is 2.2 GHz, and the equivalent capacitance values ​​of the switch branches coupled between the first connection point and the second connection point are 0.4 pF, 0.6 pF and 0.8 pF respectively.

[0398] As shown in FIG24 , the first antenna 200 resonates near 2.2 GHz and 2.6 GHz. The resonance near 2.2 GHz may correspond to the resonance (e.g., first resonance / second resonance) generated by the first radiator in the above-described embodiment. The resonance near 2.6 GHz may correspond to the resonance (e.g., first parasitic resonance / second parasitic resonance) generated by the first parasitic stub in the above-described embodiment.

[0399] It should be understood that the coupling between the first radiator and the first parasitic branch is weak and cannot well excite the parasitic resonance generated by the first parasitic branch. No pit corresponding to the parasitic resonance generated by the first parasitic branch is clearly visible in the S-parameter graph.

[0400] Since the parasitic resonance generated by the first parasitic stub is excited by a portion of the current, an obvious pit will appear in the efficiency curve (eg, radiation efficiency or system efficiency).

[0401] As shown in Figure 25, when the equivalent capacitance values ​​of the switch branch coupled between the first connection point and the fourth connection point are 0.4pF, 0.6pF and 0.8pF respectively, the radiation efficiency can produce radiation efficiency pits before and after the resonance point of the resonance generated by the first radiator.

[0402] The equivalent capacitance of the switch branch coupled between the first connection point and the fourth connection point is 0.8 pF, and the radiation efficiency pit is located near 2.35 GHz (higher than the resonance point frequency of the resonance generated by the first radiator).

[0403] The equivalent capacitance value of the switch branch coupled between the first connection point and the fourth connection point is 0.6pF, and the radiation efficiency pit is located near 2.15GHz (close to the resonance point frequency generated by the first radiator, the frequency difference is less than or equal to 75MHz or 50MHz).

[0404] The equivalent capacitance of the switch branch coupled between the first connection point and the fourth connection point is 0.4 pF, and the radiation efficiency pit is located near 2.05 GHz (lower than the resonance point frequency of the resonance generated by the first radiator).

[0405] Therefore, by switching the equivalent capacitance value of the switch branch coupled between the first connection point and the fourth connection point, the resonance point frequency of the parasitic resonance generated by the first parasitic branch can be adjusted.

[0406] Figures 26 to 28 are directional diagrams of the foldable electronic device 100 shown in Figure 23 in the unfolded state at 2.2 GHz. Figure 26 shows the directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.8 pF switch branch is coupled between the first and fourth connection points. Figure 27 shows the directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.6 pF switch branch is coupled between the first and fourth connection points. Figure 28 shows the directional diagram of the first antenna 200 when the foldable electronic device 100 is in the unfolded state and a 0.4 pF switch branch is coupled between the first and fourth connection points.

[0407] As shown in Figure 26, the equivalent capacitance of the switch branch coupled between the first connection point and the fourth connection point is 0.8pF, the radiation efficiency pit is located near 2.35GHz (higher than the resonance frequency of the first radiator), and a strong electric field can also be excited near the first parasitic branch. Therefore, the radiation pattern generated by the antenna is biased towards the first radiator (Phi (greater than 0° and less than 100°, greater than 250° and less than 360°). The directivity coefficient of the antenna is 1.22dBi.

[0408] As shown in Figure 27, the equivalent capacitance value of the switch branch coupled between the first connection point and the fourth connection point is 0.6pF, and the radiation efficiency pit is located near 2.15GHz (close to the resonant point frequency of the resonance generated by the first radiator, and the frequency difference is less than or equal to 75MHz or 50MHz). The current on the first radiator is in the same direction as the current on the first parasitic branch, which can suppress the influence of the current on the floor on one side of the first parasitic branch on the beam pointing, thereby improving the directivity of the antenna, and the gain of the antenna in the top direction is increased, and its directivity coefficient is 3.1dBi.

[0409] As shown in FIG28 , the equivalent capacitance of the switch branch coupled between the first connection point and the fourth connection point is 0.4 pF, the radiation efficiency pit is located near 2.05 GHz (lower than the resonance frequency of the resonance generated by the first radiator), and no electric field is excited near the first parasitic branch 241, and the electric field excited by the first radiator 231 is dominant. Therefore, the beam of the directional pattern generated by the antenna points toward the first parasitic branch, and the second directional pattern of the antenna deviates toward the first parasitic branch 241 (Phi (greater than 100° and less than 270°). The directivity coefficient of the antenna is 2dBi.

[0410] FIG29 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0411] As shown in Figure 29, the foldable electronic device 100 may further include a third housing 204 and a second shaft 205. The second shaft 205 is located between the first housing 201 and the third housing 204, and is rotatably connected to the first housing 201 and the third housing 204, respectively, so that the first housing 201 and the third housing 204 can rotate relative to each other.

[0412] It should be understood that the foldable electronic device 100 shown in FIG29 differs from the foldable electronic device 100 shown in FIG23 only in the positions of the third housing 204 and the second hinge 205. In the foldable electronic device 100 shown in FIG23 , the second housing 202 is located between the first housing 201 and the third housing 204. In the foldable electronic device 100 shown in FIG29 , the first housing 201 is located between the second housing 202 and the third housing 204.

[0413] In one embodiment, when the foldable electronic device 100 is in the unfolded state and in the first switching state (the first switch branch is coupled to the first connection point), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is used to generate a first main resonance, and the first parasitic branch 241 is used to generate a first parasitic resonance, and the resonance point frequency of the first parasitic resonance is higher than the resonance point frequency of the first main resonance. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0414] In one embodiment, when the foldable electronic device 100 is in the unfolded state and in the second switching state (the second switch branch is coupled to the first connection point), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is used to generate a second main resonance, and the first parasitic branch 241 is used to generate a second parasitic resonance, and the resonance point frequency of the second parasitic resonance is lower than the resonance point frequency of the second main resonance. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0415] In one embodiment, the foldable electronic device 100 is in a closed state, the fifth insulating gap 275 is aligned with the second insulating gap 272 , and / or the first insulating gap 271 is aligned with the fourth insulating gap 274 .

[0416] For the sake of simplicity, the parts of the first antenna 200 shown in Figure 29 that are similar to those of the first antenna 200 shown in Figure 23 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the position of the second parasitic branch; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the position of the first feeding point 240; the synthesis of the first area in the first radiation pattern and the second area in the second radiation pattern into a continuous third area, and the relationship between the various areas; etc.

[0417] FIG30 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0418] As shown in FIG. 30 , the third shell 204 includes a third frame 310 , and at least a portion of the third frame 310 is spaced apart from the floor 300 .

[0419] The third frame 310 includes a sixth position 216 and a seventh position 217. The sixth position 216 may be located at the fifth side 305 of the third frame 310. The seventh position 217 may be located at the fifth side 305 or the sixth side 306 of the third frame 310, where the fifth side 305 and the sixth side 306 intersect at an angle.

[0420] When the foldable electronic device 100 is in the unfolded state, the first side 301, the third side 303, and the fifth side 305 are collinearly arranged and distributed on both sides of the first rotation axis 203 and the second rotation axis 205. The terms "on both sides of the first rotation axis 203 and the second rotation axis 205" include the left side of the first rotation axis 203, the area between the first rotation axis 203 and the second rotation axis 205 (or the right side of the first rotation axis 203 and the left side of the second rotation axis 205), and the right side of the second rotation axis 205. In one embodiment, the first side 301, the third side 303, and the fifth side 305 may be the same side of the foldable electronic device 100, for example, the top or bottom side.

[0421] The first antenna 200 further includes a third parasitic stub 243 . The third parasitic stub 243 includes a conductive portion of the third frame 310 between the sixth position 216 and the seventh position 217 .

[0422] It should be understood that the only difference between the first antenna 200 shown in FIG. 30 and the foldable electronic device 100 shown in FIG. 29 is the third parasitic branch 243 .

[0423] In the foldable electronic device 100 shown in FIG29 , the third parasitic branch 243 is not provided (the third frame 310 does not include the sixth position 216 and the seventh position 217). Because the floor on one side of the third housing 204 is larger, the directional pattern (e.g., the first directional pattern, the second directional pattern) generated by the first antenna 200 is affected by the floor 300 on the side of the third housing 204, and the directional pattern (e.g., the first directional pattern, the second directional pattern) generated by the first antenna 200 is deflected toward the third housing 204.

[0424] In the foldable electronic device 100 shown in FIG30 , a third parasitic branch 243 is provided. When the foldable electronic device 100 is in the unfolded state, at the resonance point (e.g., the first resonance point, the second resonance point) where the first radiator 231 resonates, the current generated on the first radiator 231 and the current generated on the third parasitic branch 243 are in the same direction, which can reduce the impact of the current on the floor 300 on the side of the third housing 204 on the directional pattern generated by the first antenna 200. Furthermore, the current generated on the first radiator 231 and the current generated on the third parasitic branch 243 in the same direction can form an effect similar to a current array, giving the first antenna 200 a stronger linear polarization characteristic and a higher directivity coefficient, which can improve the radiation characteristics (e.g., gain) of the first antenna 200.

[0425] In one embodiment, the third parasitic stub 243 is configured to generate a third parasitic resonance. The resonant frequency of the third parasitic resonance is lower than the resonant frequency of the first radiator 231 (e.g., the resonant frequency of the first resonance, the resonant frequency of the second resonance). In one embodiment, the frequency difference between the resonant frequency of the third parasitic resonance and the resonant frequency of the first radiator 231 (e.g., the resonant frequency of the first resonance, the resonant frequency of the second resonance) is less than or equal to 100 MHz.

[0426] It should be understood that when the frequency of the resonance point of the third parasitic resonance and the frequency of the resonance point of the first radiator 231 (for example, the resonance point of the first resonance, the resonance point of the second resonance) are within the above range, the similar current array formed by the current generated on the first radiator 231 and the current generated on the third parasitic branch 243 has a better effect, and the first antenna 200 can have better radiation characteristics (for example, gain).

[0427] In one embodiment, the sixth position 216 is located at the fifth side 305, and the seventh position 217 is located at the sixth side 306. The third frame 310 can have a sixth insulating slot 276 and a seventh insulating slot 277 at the sixth position 216 and the seventh position 217, respectively. The third parasitic branch 243 can have a structure similar to a dipole antenna, as shown in FIG30 .

[0428] In one embodiment, a grounding point may be included between the sixth position 216 and the seventh position 217 , and the third frame 310 is coupled to the floor 300 at the grounding point, as shown in FIG. 30 .

[0429] In one embodiment, the foldable electronic device 100 is in a folded state, the sixth insulating gap 276 , the fifth insulating gap 275 and the second insulating gap 272 are aligned, and / or the first insulating gap 271 and the fourth insulating gap 274 are aligned.

[0430] In one embodiment, the sixth position 216 and the seventh position 217 may be located at the fifth side 305. The third frame 310 may have a sixth insulating gap 276 at the sixth position 216 and be coupled to the floor 300 at the seventh position 217. The third parasitic branch 243 may have an IFA-like structure, as shown in FIG31 .

[0431] In one embodiment, the sixth position 216 in FIG31 is closer to the second rotation axis 205 than the seventh position 217 in the first direction, as shown in FIG31 .

[0432] It should be understood that when the flexible display screen of the foldable device 100 is bent, the first direction can be understood as a direction parallel to the plane of the display portion of the flexible display screen on the third shell 204 and perpendicular to the extension direction of the first rotation axis 203.

[0433] In one embodiment, seventh position 217 is closer to second rotation axis 205 than sixth position 216 in the first direction, as shown in FIG32 . In one embodiment, third parasitic stub 243 may further include fifth connection point 225 and sixth connection point 226. Third parasitic stub 243 couples to the second electronic component between fifth connection point 225 and sixth connection point 226, and defines eighth insulating gap 278, thereby forming a metamaterial structure within third parasitic stub 243.

[0434] It should be understood that the third parasitic branch 243 can have any structure, and the embodiment of the present application does not limit this. It can be determined based on actual production or design. For the sake of brevity, it will not be described in detail.

[0435] In one embodiment, the foldable electronic device 100 is in a folded state, the sixth insulating gap 276 , the fifth insulating gap 275 are aligned with the second insulating gap 272 , and / or the eighth insulating gap 278 , the first insulating gap 271 are aligned with the fourth insulating gap 274 .

[0436] For the sake of simplicity, the parts of the first antenna 200 shown in Figures 30 to 32 that are similar to the first antenna 200 shown in Figure 29 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the position of the second parasitic branch; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the position of the first feeding point 240; the first area in the first radiation pattern and the second area in the second radiation pattern are combined into a continuous third area, and the relationship between the various areas; etc.

[0437] FIG33 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0438] As shown in FIG. 33 , the third frame 310 includes a sixth position 216 , a seventh position 217 , and an eighth position 218 .

[0439] In one embodiment, the sixth position 216 is located between the seventh position 217 and the eighth position 218. The sixth position 216, the seventh position 217, and the eighth position 218 are all located on the fifth side 305 of the third frame 310. In one embodiment, the third frame 310 defines a sixth insulating gap 276 at the sixth position 216. The third frame 310 is coupled to the floor 300 at the seventh position 217 and the eighth position 218.

[0440] The foldable electronic device 100 includes a second antenna 400 , which includes a second feeding circuit 401 , a second radiator 232 , and a third parasitic stub 243 .

[0441] The second radiator 232 includes a second feeding point, and the second feeding circuit 401 is coupled to the feeding point to feed an electrical signal to the second antenna 400. The second radiator 232 includes a conductive portion of the third frame 310 between the sixth position 216 and the eighth position 218. The third parasitic stub 243 includes a conductive portion of the third frame 310 between the sixth position 216 and the seventh position 217.

[0442] It should be understood that in the foldable electronic device 100 shown in FIG33 , only the second radiator 232 and the third parasitic branch 243 are illustrated as having an IFA-like structure. In actual production or design, the second radiator 232 and the third parasitic branch 243 may also have other structures. For example, the second radiator 232 and the third parasitic branch 243 may have a metamaterial structure or a dipole antenna-like structure. This embodiment of the present application does not limit this, and for the sake of brevity, a detailed description will not be given.

[0443] It should be understood that the only difference between the first antenna 200 shown in FIG. 33 and the foldable electronic device 100 shown in FIG. 30 to FIG. 32 is the second radiator 232 .

[0444] In the foldable electronic device 100 shown in FIG29 , the second radiator 232 is not provided. The third parasitic branch 243 serves as a parasitic branch of the first antenna 200, and is used to reduce the influence of the floor 300 on one side of the third housing 204 on the directional pattern (e.g., the first directional pattern and the second directional pattern) generated by the first antenna 200, thereby improving the radiation characteristics (e.g., gain) of the first antenna 200.

[0445] In the foldable electronic device 100 shown in FIG33 , the third parasitic branch 243 can serve as a parasitic branch for both the first antenna 200 and the second antenna 400. When the first antenna 200 is operating, the third parasitic branch 243 can be used to reduce the influence of the floor 300 on one side of the third housing 204 on the directional pattern (e.g., first directional pattern, second directional pattern) generated by the first antenna 200, thereby improving the radiation characteristics (e.g., gain) of the first antenna 200. When the second antenna 400 is operating, the third parasitic branch 243 can be used to improve the radiation characteristics (e.g., operating bandwidth) of the second antenna 400.

[0446] In one embodiment, the operating frequency band of the second antenna 400 may include a non-satellite communication frequency band. The non-satellite communication frequency band may include, for example, at least a portion of the middle band (MB) (1710 MHz-2170 MHz) in the long term evolution (LTE) technology, and / or at least a portion of the high band (HB) (2300 MHz-2690 MHz), such as B1 (1920 MHz-1980 MHz), B3 (1710 MHz-1785 MHz), and B7 (2500 MHz-2570 MHz) in LTE. The non-satellite communication frequency band may include, for example, the 2.4 GHz frequency band or the 5 GHz frequency band in Wi-Fi technology. In one embodiment, the 2.4 GHz frequency band may include 2.4 GHz-2.4835 GHz. In one embodiment, the 5 GHz frequency band may include 5.17 GHz-5.33 GHz. The non-satellite communication frequency band may include Bluetooth wireless technology (2.4 GHz-2.4835 GHz) and the L1 frequency band in the global positioning system (GPS) may include 1575.42 MHz±1.023 MHz.

[0447] In one embodiment, when the first antenna 200 is in operation, the second radiator 232 can be configured to generate a third resonance. The frequency difference between the resonant point frequency of the third resonance and the resonant point frequency of the first radiator 231 (e.g., the first resonance, the second resonance) is greater than or equal to 400 MHz. In one embodiment, the resonant point frequency of the third resonance is higher than the resonant point frequency of the first radiator 231 (e.g., the first resonance, the second resonance).

[0448] It should be understood that since the first antenna 200 operates in a satellite communication frequency band (e.g., a transmission frequency band), the power of the RF signal fed into the first antenna 200 during operation is relatively high. This high-power electrical signal is injected into the second feed circuit 401 of the second antenna 400, potentially damaging the electronic components in the second feed circuit 401. A switch can be coupled between the second feed circuit 401 and the second feed point. When the first antenna 200 is operating, this switch can disconnect the second feed circuit 401 from the second feed point (or couple the feed point to the floor 300), preventing the high-power RF signal from flowing into the second feed circuit 401 and thus preventing damage to the electronic components. However, the provision of a switch between the second feed circuit 401 and the second feed point results in power loss in the RF signal fed from the second feed circuit 401 to the second feed point, thereby degrading the radiation performance of the second antenna 400. Therefore, when the frequency difference between the resonant point frequency of the third resonance and the resonant point frequency of the resonance generated by the first radiator 231 (e.g., the first resonance, the second resonance) is within the above range, the isolation between the first antenna 200 and the second antenna 400 is good, and high-power RF signals will not flow into the second feeding circuit 401, thereby preventing damage to electronic components. In addition, no switch is provided between the second feeding circuit 401 and the feeding point, so the power of the RF signal fed to the feeding point by the second feeding circuit 401 will not be lost.

[0449] In one embodiment, the third parasitic stub 243 and the second radiator 232 may both be provided with a tuning circuit for adjusting the resonance point frequency of the parasitic resonance generated by the third parasitic stub 243 and the resonance point frequency of the resonance generated by the second radiator 232 .

[0450] In one embodiment, the foldable electronic device 100 is in a folded state, the sixth insulating gap 276 , the fifth insulating gap 275 and the second insulating gap 272 are aligned, and / or the first insulating gap 271 and the fourth insulating gap 274 are aligned.

[0451] For the sake of simplicity, the parts of the first antenna 200 shown in Figure 33 that are similar to the first antenna 200 shown in Figures 30 to 32 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the position of the second parasitic branch; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the position of the first feeding point 240; the synthesis of the first area in the first radiation pattern and the second area in the second radiation pattern into a continuous third area, and the relationship between the various areas; etc.

[0452] FIG34 is an S-parameter simulation result of the first antenna 200 and the second antenna 400 in the foldable electronic device 100 shown in FIG33 .

[0453] As shown in FIG34 , the first antenna 200 resonates around 2.2 GHz and 2.4 GHz. The resonance around 2.2 GHz may correspond to the resonance (e.g., the first resonance and the second resonance) generated by the first radiator, and the resonance around 2.4 GHz may correspond to the resonance generated by the second parasitic stub.

[0454] The second antenna 400 resonates around 2.1 GHz and 2.7 GHz. The resonance around 2.1 GHz may correspond to the resonance generated by the third parasitic branch (e.g., the third parasitic resonance), and the resonance around 2.7 GHz may correspond to the resonance generated by the second radiator (e.g., the third resonance).

[0455] It should be understood that since the frequency difference between the resonance point generated by the first radiator and the resonance point generated by the second radiator is large, there is a large isolation between the first antenna 200 and the second antenna 400 (S21<-20dB).

[0456] Figures 35 and 36 show the directional patterns of the first antenna 200 at 2.2 GHz in the foldable electronic device 100 shown in Figure 33. Figure 35 shows the first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 33 when in the first switching state. Figure 36 shows the second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 33 when in the second switching state.

[0457] As shown in FIG35 , the foldable electronic device 100 is in the unfolded state. In the first switch state, the directional pattern generated by the antenna is biased toward the first radiator 231. greater than 0° and less than 150°, greater than 270° and less than 360°).

[0458] As shown in FIG36 , the foldable electronic device 100 is in the unfolded state. In the second switch state, the directional pattern generated by the antenna is biased toward the first parasitic branch 241. greater than 80° and less than 270°).

[0459] Figure 37 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0460] As shown in Figure 37, the third frame 310 includes a sixth position 216 and a seventh position 217. The seventh position 217 is closer to the second rotation axis 205 than the sixth position 216 in the first direction. The third frame 310 can have a sixth insulating gap 276 at the sixth position 216 and be coupled to the floor 300 at the seventh position 217.

[0461] The first antenna 200 further includes a third parasitic stub 243 , a fifth switch branch 265 , a sixth switch branch 266 , and a second switch 252 .

[0462] The third parasitic branch 243 includes a conductive portion of the third frame 310 between the sixth position 216 and the seventh position 217. The third parasitic branch 243 may also include a fifth connection point 225 and a sixth connection point 226. The third parasitic branch 243 defines an eighth insulating gap 278 between the fifth connection point 225 and the sixth connection point 226, forming a metamaterial structure in the third parasitic branch 243.

[0463] The fifth switch branch 265, the sixth switch branch 266 and the second switch 252 are coupled between the fifth connection point 225 and the sixth connection point 226. The first connection port of the second switch 252 is coupled to the fifth switch branch 265, and the second connection port of the second switch 252 is coupled to the sixth switch branch 266.

[0464] For ease of understanding, fifth switch branch 265 and sixth switch branch 266 can be considered to be connected in parallel. In one embodiment, fifth switch branch 265 and sixth switch branch 266 are connected in parallel between floor 300 and second switch 252. In one embodiment, fifth switch branch 265 and sixth switch branch 266 are connected in parallel between first connection point 221 and second switch 252.

[0465] It should be understood that the only difference between the first antenna 200 shown in FIG. 37 and the foldable electronic device 100 shown in FIG. 30 to FIG. 32 is the fifth switch branch 265 , the sixth switch branch 266 and the second switch 252 .

[0466] In the foldable electronic device 100 shown in Figures 29 to 32, the fifth switch branch 265, the sixth switch branch 266, and the second switch 252 are not provided. At the resonance point where the first radiator 231 resonates (e.g., the resonance point of the first resonance and the resonance point of the second resonance), the current generated on the first radiator 231 and the current generated on the third parasitic branch 243 are in the same direction. This same direction of the current generated on the first radiator 231 and the current generated on the third parasitic branch 243 can form an effect similar to a current array, giving the first antenna 200 a stronger linear polarization characteristic and a higher directivity coefficient, thereby improving the radiation characteristics (e.g., gain) of the first antenna 200.

[0467] In the foldable electronic device 100 shown in Figure 37, the third parasitic branch 243 can be used to make the difference between the first radiation pattern and the second radiation pattern generated by the antenna larger (for example, the angle between the maximum radiation directions is increased, for example, the angle between the second direction and the third direction is greater than or equal to 15°), which can further widen the width of the radiation beam of the first antenna 200, so that the first antenna 200 has good communication characteristics within a wider angle range (angle with the top direction).

[0468] The first switching state can be understood as the common port of first switch 251 being coupled to the first connection port of first switch 251, and the common port of second switch 252 being coupled to the first connection port of second switch 252. The first switch branch 261 is coupled to the first connection point 221 (the first switch branch 261 is coupled between the first connection point 221 and the fourth connection point 224), and the fifth switch branch 265 is coupled to the fifth connection point 225 (the fifth switch branch 265 is coupled between the fifth connection point 225 and the sixth connection point 226). The first antenna generates the aforementioned first radiation pattern. In one embodiment, the aforementioned first radiation pattern can be understood as being generated by the first radiator 231, the first parasitic stub 241, the second parasitic stub 242, and the third parasitic stub 243. In one embodiment, the aforementioned first radiation pattern can be understood as being generated by the first radiator 231, the first parasitic stub 241, the second parasitic stub 242, the third parasitic stub 243, the first switch branch 261, and the fifth switch branch 265.

[0469] The second switching state can be understood as the common port of first switch 251 being coupled to the second connection port of first switch 251, and the common port of second switch 252 being coupled to the second connection port of second switch 252. The second switch branch 262 is coupled to the first connection point 221 (the second switch branch 262 is coupled between the first connection point 221 and the fourth connection point 224), and the sixth switch branch 266 is coupled to the fifth connection point 225 (the sixth switch branch 266 is coupled between the fifth connection point 225 and the sixth connection point 226). The first antenna generates the aforementioned second radiation pattern. In one embodiment, the aforementioned second radiation pattern can be understood as being generated by the first radiator 231, the first parasitic stub 241, the second parasitic stub 242, and the third parasitic stub 243. In one embodiment, the aforementioned second radiation pattern can be understood as being generated by the first radiator 231, the first parasitic stub 241, the second parasitic stub 242, the third parasitic stub 243, the second switch branch 262, and the sixth switch branch 266.

[0470] In one embodiment, in the first switching state (the first switching branch 261 is coupled to the first connection point 221, and the fifth switching branch 265 is coupled to the fifth connection point 225), the first feeding circuit 230 feeds an electrical signal, the first radiator 231 is used to generate a first main resonance, the first parasitic branch 241 is used to generate a first parasitic resonance, and the third parasitic branch 243 is used to generate a third parasitic resonance. The resonance point frequency of the first parasitic resonance is higher than the resonance point frequency of the first main resonance, and the resonance point frequency of the third parasitic resonance is lower than the resonance point frequency of the first main resonance.

[0471] In one embodiment, the first main resonance, the first parasitic resonance and the third parasitic resonance together form the above-mentioned first resonance (because the resonance point of the first parasitic resonance, the resonance point of the third parasitic resonance and the resonance point of the first main resonance have a small frequency difference, in the S-parameter diagram, the first main resonance, the first parasitic resonance and the third parasitic resonance are merged into one resonance).

[0472] In one embodiment, in the first switching state (the first switch branch 261 is coupled to the first connection point 221, and the fifth switch branch 265 is coupled to the fifth connection point 225), the resonance point of the first parasitic resonance and the resonance point of the third parasitic resonance are located within the resonance frequency band of the first main resonance. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point of the third parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the third parasitic resonance and the resonance point frequency of the first main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0473] When the resonant point frequency of the first parasitic resonance is higher than the resonant point frequency of the first resonance, a strong electric field can also be excited near the first parasitic branch 241. When the resonant point frequency of the third parasitic resonance is lower than the resonant point frequency of the first resonance, no strong electric field is excited near the third parasitic branch 243. Because the beam of the directional pattern generated by the first parasitic branch 241 (without the first radiator 231 and the third parasitic branch 243, only the first parasitic branch 241 is excited) points toward the side of the third parasitic branch 243, the first directional pattern generated by the antenna is biased toward the side of the third parasitic branch 243.

[0474] At the same time, in an embodiment of the present application, the coupling between the first radiator 231 and the parasitic branches (for example, the first parasitic branches 241 and the third parasitic branches 243) is weak, and the parasitic resonance cannot be well excited. Therefore, the pit corresponding to the parasitic resonance does not appear clearly in the S-parameter diagram. However, since the parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the first frequency point, the first frequency point can be considered to correspond to the resonance point of the above-mentioned parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0475] In one embodiment, in the second switching state (second switch branch 262 is coupled to first connection point 221, and sixth switch branch 266 is coupled to fifth connection point 225), first feed circuit 230 feeds an electrical signal, first radiator 231 is used to generate a second main resonance, first parasitic branch 241 is used to generate a second parasitic resonance, and third parasitic branch 243 is used to generate a fourth parasitic resonance. The resonant frequency of the second parasitic resonance is lower than the resonant frequency of the second main resonance, and the resonant frequency of the fourth parasitic resonance is higher than the resonant frequency of the first main resonance.

[0476] In one embodiment, the second main resonance, the second parasitic resonance and the fourth parasitic resonance together form the above-mentioned second resonance (because the resonance point of the second parasitic resonance, the resonance point of the fourth parasitic resonance and the resonance point of the second main resonance have a small frequency difference, in the S-parameter diagram, the second main resonance, the second parasitic resonance and the fourth parasitic resonance are merged into one resonance).

[0477] In one embodiment, in the second switching state (second switch branch 262 coupled to first connection point 221, sixth switch branch 266 coupled to fifth connection point 225), the resonance point of the second parasitic resonance is within the resonance frequency band of the second main resonance. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 250 MHz and greater than or equal to 50 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the second main resonance is less than or equal to 150 MHz and greater than or equal to 50 MHz.

[0478] When the resonant frequency of the second parasitic resonance is lower than the resonant frequency of the second resonance, no electric field is excited near the first parasitic branch 241. When the resonant frequency of the fourth parasitic resonance is higher than the resonant frequency of the first resonance, a strong electric field can also be excited near the third parasitic branch 243. Because the beam of the directional pattern generated by the third parasitic branch 243 (without the first radiator 231 and the first parasitic branch 241, only the third parasitic branch 243 is excited) points toward the side of the first parasitic branch 241, the second directional pattern generated by the antenna is biased toward the side of the first parasitic branch 241.

[0479] At the same time, in an embodiment of the present application, the coupling between the first radiator 231 and the parasitic branches (for example, the first parasitic branches 241 and the third parasitic branches 243) is weak and cannot excite parasitic resonance well. Therefore, the pit corresponding to the parasitic resonance does not appear clearly in the S-parameter diagram. However, since the parasitic resonance is excited by part of the current, an obvious pit will appear in the efficiency curve (for example, radiation efficiency or system efficiency). For example, if an efficiency pit appears at the second frequency point, the second frequency point can be considered to correspond to the resonance point of the above-mentioned parasitic resonance. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1.5dB. In one embodiment, the efficiency (for example, radiation efficiency or system efficiency) caused by the pit does not exceed 1dB.

[0480] It should be understood that in the foldable electronic device 100 shown in FIG37 , only parasitic branches (e.g., first parasitic branch 241 and third parasitic branch 243) are used as metamaterial structures for illustration. In actual production or design, parasitic branches can also have other structures. For example, the parasitic branches can have a structure similar to an IFA, and the switch and multiple switch branches can be coupled and connected between the connection point and the floor. The embodiments of the present application do not limit this, and for the sake of brevity, they will not be described in detail.

[0481] For the sake of simplicity, the parts of the first antenna 200 shown in Figure 37 that are similar to those of the first antenna 200 shown in Figures 30 to 32 are not described one by one. For example, the similar parts include: the position of the first radiator 231; the position of the first parasitic branch 241; the position of the second parasitic branch; the frequency band of satellite communication; the first resonance and the second resonance generated by the first radiator 231 in the first switching state and the second switching state; the beam direction generated by the first radiator 231 in the first switching state and the second switching state; the position of the first feeding point 240; the synthesis of the first area in the first radiation pattern and the second area in the second radiation pattern into a continuous third area, and the relationship between the various areas; etc.

[0482] Figures 38 and 39 illustrate the directional patterns of the first antenna 200 at 2.2 GHz in the foldable electronic device 100 shown in Figure 37 . Figure 38 illustrates the first directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 37 in the first switching state. Figure 39 illustrates the second directional pattern generated by the first antenna 200 in the foldable electronic device 100 shown in Figure 37 in the second switching state.

[0483] As shown in FIG38 , the foldable electronic device 100 is in the unfolded state. In the first switch state, the directional pattern generated by the antenna is biased toward the third parasitic branch 241. greater than 0° and less than 100°, greater than 250° and less than 360°).

[0484] As shown in FIG39 , the foldable electronic device 100 is in the unfolded state. In the second switch state, the directional pattern generated by the antenna is biased toward the first parasitic branch 241. greater than 100° and less than 270°).

[0485] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0486] Figure 40 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0487] It should be understood that in the above embodiment, when the foldable electronic device 100 is in the unfolded state, only the first housing 201 and the second housing 202 are in the flattened state. It should be understood that the unfolded state includes the flattened state and the hovering state.

[0488] The flattened state can be understood as the first shell 201 and the second shell 202 being 180°, or, it can also be understood as there is no bending between the display part of the flexible display 110 corresponding to the first shell 201 and the display part of the flexible display corresponding to the second shell 202.

[0489] In one embodiment, when the foldable electronic device 100 is in a hovering state, the angle between the first shell 201 and the second shell 202 is greater than or equal to 60° and less than 180°, or greater than 180° and less than or equal to 300°.

[0490] In one embodiment, when the first shell 201 and the second shell 202 are in the hovering state, the angle between the first shell 201 and the second shell 202 is greater than or equal to 90° and less than 180°, or greater than 180° and less than or equal to 270°.

[0491] It should be understood that when the angle between the first shell 201 and the second shell 202 is within the above range, the stability of the foldable electronic device 100 is better.

[0492] The technical solutions described in the embodiments of the present application can all be applied when the first shell 201 and the second shell 202 are in a flattened state or a suspended state. For the sake of brevity, they will not be described one by one.

Claims

1. A foldable electronic device (100), characterized in that: include: floor(300); A first shell (201) and a second shell (202), wherein The first shell (201) includes a first frame (210), the second shell (202) includes a second frame (220), the first frame (210) includes a first position (211) and a second position (212), the second frame (220) includes a third position (213) and a fourth position (214), the first frame (210) is coupled with the floor (300) or an insulating gap is opened at the first position (211), the first frame (210) is coupled with the floor (300) or an insulating gap is opened at the second position (212), the second frame (220) is coupled with the floor (300) or an insulating gap is opened at the third position (213), and the second frame (220) is coupled with the floor (300) or an insulating gap is opened at the fourth position (214); a first rotating shaft (203), the first rotating shaft (203) being located between the first shell (201) and the second shell (202), and the first rotating shaft (203) being rotatably connected to the first shell (201) and the second shell (202), respectively; and a first antenna (200), the first antenna (200) comprising: a first radiator (231) and a first parasitic branch (241), wherein the first radiator (231) includes a conductive portion of the first frame (210) between the first position (211) and the second position (212), and the first parasitic branch (241) includes a conductive portion of the second frame (220) between the third position (213) and the fourth position (214), at least a portion of the first radiator (231) is spaced apart from the floor (300), and at least a portion of the first parasitic branch (241) is spaced apart from the floor (300); and a first feeding circuit (230), the first radiator (231) comprising a first feeding point (240), the first feeding circuit (230) being coupled to the first feeding point (240); a first switch (251), the first parasitic branch (241) including a first connection point (221), the first switch (251) being coupled to the first connection point (221); The second position (212) is closer to the first rotation axis (203) than the first position (211) in the first direction, the third position (213) is closer to the first rotation axis (203) than the fourth position (214) in the first direction, and the first direction is perpendicular to the extension direction of the first rotation axis (203); When the foldable electronic device (100) is in an unfolded state, the first switch (251) is used to switch between a first directional pattern and a second directional pattern generated by the first antenna (200), wherein the beam direction of the first directional pattern is different from the beam direction of the second directional pattern; When the first antenna (200) generates the first directional pattern and the second directional pattern, the operating frequency band of the first antenna (200) covers a transmission frequency band in at least one satellite communication frequency band; or When the first antenna (200) generates the first directional pattern and the second directional pattern, the operating frequency band of the first antenna (200) covers the receiving frequency band in the at least one satellite communication frequency band.

2. The foldable electronic device (100) according to claim 1, characterized in that An angle between the second direction and the third direction is greater than or equal to 10° and less than or equal to 90°. The second direction is the maximum radiation direction of the first directional pattern, and the third direction is the maximum radiation direction of the second directional pattern.

3. The foldable electronic device (100) according to claim 1 or 2, characterized in that: The first frame (210) includes a first side (301) and a second side (302) intersecting at an angle, the second position (212) is located on the first side (301), the first position (211) is located on the first side (301) or the second side (302), and / or, The second frame (220) includes a third side (303) and a fourth side (304) intersecting at an angle, the third position (313) is located on the third side (303), and the fourth position (314) is located on the third side (303) or the fourth side (304); Based on the foldable electronic device (100) being in an unfolded state, the first side (301) and the third side (303) are collinearly arranged and distributed on both sides of the first rotating shaft (203).

4. The foldable electronic device (100) according to any one of claims 1 to 3, characterized in that: The first frame is provided with a first insulating gap (271) at the first position (211), and the first frame (210) is coupled with the floor (300) at the second position (212).

5. The foldable electronic device (100) according to claim 4, characterized in that The first antenna (200) further includes a first electronic component; The first radiator (231) includes a second connection point (222) and a third connection point (223), the first electronic component is coupled and connected between the second connection point (222) and the third connection point (223), and the first radiator (231) opens a second insulating gap (272) between the second connection point (222) and the third connection point (223).

6. The foldable electronic device (100) according to claim 5, characterized in that The distance between the second connection point (222) and the second insulating gap (272) is less than or equal to 5 mm, and / or, The distance between the third connection point (223) and the second insulating gap (272) is less than or equal to 5 mm.

7. The foldable electronic device (100) according to any one of claims 4 to 6, characterized in that: The distance between the second position (212) and the center of the first rotating shaft (203) in the first direction is less than or equal to 20 mm.

8. The foldable electronic device (100) according to any one of claims 1 to 3, characterized in that: The first frame (210) is provided with a first insulating gap (271) and a third insulating gap (273) at the first position (211) and the second position (212).

9. The foldable electronic device (100) according to claim 8, characterized in that: The first frame (210) further includes a fifth position (215), wherein the fifth position (215) is closer to the first rotation axis (203) than the second position (212) in the first direction, and the first frame (210) is coupled to the floor (300) at the fifth position (215); The first antenna (200) further includes a second parasitic branch (242), the second parasitic branch (242) including a conductive portion of the first frame (210) between the second position (212) and the fifth position (215), and at least a portion of the second parasitic branch (242) is spaced apart from the floor (300).

10. The foldable electronic device (100) according to any one of claims 1 to 9, characterized in that: The second frame (220) has a fourth insulating gap (274) at the fourth position (214), and the second frame (220) is coupled to the floor (300) at the third position (213); The first switch (251) is coupled between the first connection point (221) and the floor (300).

11. The foldable electronic device (100) according to any one of claims 1 to 10, characterized in that: The second frame (220) has a fourth insulating gap (274) at the fourth position (214), and the second frame (220) is coupled to the floor (300) at the third position (213); The first parasitic branch (241) includes a fourth connection point (224), and the first parasitic branch (241) defines a fifth insulating gap (275) between the first connection point (221) and the fourth connection point (224); The first switch (251) is coupled between the first connection point (221) and the fourth connection point (224).

12. The foldable electronic device (100) according to claim 11, characterized in that The distance between the first connection point (221) and the fifth insulating gap (275) is less than or equal to 5 mm, and / or, The distance between the fourth connection point (224) and the fifth insulating gap (275) is less than or equal to 5 mm.

13. The foldable electronic device (100) according to any one of claims 10 to 12, characterized in that: The distance between the third position (213) and the center of the first rotating shaft (203) in the first direction is less than or equal to 20 mm.

14. The foldable electronic device (100) according to any one of claims 1 to 13, characterized in that: When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first radiator (231) and the first parasitic branch (241) are used to generate the first directional pattern; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first radiator (231) and the first parasitic branch (241) are used to generate the second directional pattern.

15. The foldable electronic device (100) according to any one of claims 1 to 14, characterized in that: The foldable electronic device (100) is in an unfolded state, the first switch (251) is in a first switch state, and the first radiator (231) is used to generate a first resonance; The foldable electronic device (100) is in an unfolded state, and the first switch (251) is in a second switch state, and the first radiator (231) is used to generate a second resonance. The resonant frequency band of the first resonance and the resonant frequency band of the second resonance include the transmitting frequency band; or the resonant frequency band of the first resonance and the resonant frequency band of the second resonance include the receiving frequency band.

16. The foldable electronic device (100) according to claim 15, characterized in that When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first radiator (231) is used to generate a first main resonance, and the first parasitic branch (241) is used to generate a first parasitic resonance, the first parasitic resonance is located within a resonant frequency band of the first main resonance, and the first main resonance and the first parasitic resonance together form the first resonance; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first radiator (231) is used to generate a second main resonance, the first parasitic branch (241) is used to generate a second parasitic resonance, the second parasitic resonance is located within the resonant frequency band of the second main resonance, and the second main resonance and the second parasitic resonance together form the second resonance.

17. The foldable electronic device (100) according to claim 16, characterized in that The resonance point frequency of the first parasitic resonance is higher than the resonance point frequency of the first main resonance, and the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first main resonance is greater than or equal to 50 MHz and less than or equal to 250 MHz; The resonance point frequency of the second parasitic resonance is lower than the resonance point frequency of the second main resonance, and the frequency difference between the resonance point frequency of the second main resonance and the resonance point frequency of the second parasitic resonance is greater than or equal to 50 MHz and less than or equal to 250 MHz.

18. The foldable electronic device (100) according to claim 16 or 17, characterized in that: When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first antenna (200) generates a first efficiency pit at a first frequency point, the frequency of the first frequency point is higher than the resonant point frequency of the first resonance, and the frequency difference between the resonant point frequency of the first resonance and the first frequency point is greater than or equal to 50 MHz and less than or equal to 250 MHz; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first antenna (200) generates a second efficiency pit at a second frequency point, the frequency of the second frequency point is lower than the resonant point frequency of the second resonance, and the frequency difference between the resonant point frequency of the second resonance and the second frequency point is greater than or equal to 50 MHz and less than or equal to 250 MHz.

19. The foldable electronic device (100) according to any one of claims 1 to 18, characterized in that: When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first radiator (231) and the first parasitic branch (241) are used to generate the first directional pattern, and the gain of the first area in the first directional pattern is greater than or equal to a first threshold; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first radiator (231) and the first parasitic branch (241) are used to generate the second directional pattern, and the gain of the second region in the second directional pattern is greater than or equal to the first threshold value; The first region and the second region are combined into a third region, and the area S1 of the first region, the area S2 of the second region, and the area S3 of the third region satisfy: S3 ≥ S1×130%, and S3 ≥ S2×130%.

20. The foldable electronic device (100) according to any one of claims 1 to 19, characterized in that: The foldable electronic device may further include a third housing (204) and a second rotating shaft (205); The second rotating shaft (205) is located between the second shell (202) and the third shell (204), and the second rotating shaft (205) is rotationally connected to the second shell (202) and the third shell (204) respectively.

21. The foldable electronic device (100) according to any one of claims 1 to 19, characterized in that: The foldable electronic device (100) may further include a third housing (204) and a second rotating shaft (205); The second rotating shaft (205) is located between the first shell (201) and the third shell (204), and the second rotating shaft (205) is rotationally connected to the first shell (201) and the third shell (204) respectively.

22. The foldable electronic device (100) according to claim 21, characterized in that The third housing (204) includes a third frame (310), the third frame (310) includes a sixth position (216) and a seventh position (217), the sixth position (216) being closer to the second rotation axis (205) than the seventh position (217) in the first direction; The first frame (210) includes a first side (301), the second frame (220) includes a third side (303) and a fourth side (304) intersecting at an angle, the third frame (310) includes a fifth side (305) and a sixth side (306) intersecting at an angle, the first position (211) and the second position (212) are located on the first side (301), the third position (213) is located on the third side (303), the fourth position (214) is located on the third side (303) or the fourth side (304), the sixth position (216) is located on the fifth side (305), and the seventh position (217) is located on the fifth side (305) or the sixth side (306), and the third frame (310) is coupled to the floor (300) or has an insulating gap at the sixth position (216), and is coupled to the floor (300) or has an insulating gap at the seventh position (217); Based on the foldable electronic device (100) being in an unfolded state, the first side (301), the third side (303), and the fifth side (305) are collinearly arranged and distributed on both sides of the first rotating shaft (203) and the second rotating shaft (205); The first antenna (200) further includes a third parasitic branch (243), wherein the third parasitic branch (243) includes a conductive portion of the third frame (310) between the sixth position (216) and the seventh position (217).

23. The foldable electronic device (100) according to claim 22, characterized in that When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first radiator (231) is used to generate a first resonance; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first radiator (231) is used to generate a second resonance; At the resonance point of the first resonance or the resonance point of the second resonance, the current on the first radiator (231) and the current on the third parasitic branch (243) are in the same direction.

24. The foldable electronic device (100) according to claim 22 or 23, characterized in that: When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state, the first radiator (231) is used to generate a first resonance; When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a second switch state, the first radiator (231) is used to generate a second resonance; The third parasitic branch (243) is used to generate a third parasitic resonance, the resonance point frequency of the third parasitic resonance is lower than the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance, and the frequency difference between the resonance point frequency of the third parasitic resonance and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is less than or equal to 100 MHz.

25. The foldable electronic device (100) according to any one of claims 22 to 24, characterized in that The third frame (310) further includes an eighth position (218), the sixth position (216) is located between the seventh position (217) and the eighth position (218), the third frame (310) opens a sixth insulating gap (276) at the sixth position (216), and the third frame (310) is coupled to the floor (300) or opens an insulating gap at the seventh position, and is coupled to the floor (300) or opens an insulating gap at the eighth position (218); The foldable electronic device (100) further includes a second antenna (400), the second antenna (400) including a second radiator (232) and a second feeding circuit (401), the second radiator (232) including a conductive portion of the third frame (310) between the sixth position (216) and the eighth position (218), at least a portion of the second radiator (232) being spaced apart from the floor (300), the second radiator (232) including a second feeding point, the second feeding circuit (401) being coupled to the second feeding point, and the operating frequency band of the second antenna (400) including a non-satellite communication frequency band.

26. The foldable electronic device (100) according to claim 25, characterized in that When the foldable electronic device (100) is in an unfolded state and the first switch (251) is in a first switch state or a second switch state, the first radiator (231) is used to generate a first resonance or a second resonance, and the second radiator (232) is used to generate a third resonance; The frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is greater than or equal to 400 MHz.

27. The foldable electronic device (100) according to claim 22, characterized in that The third frame (310) is coupled to the floor (300) at the sixth position (216), and the third frame (310) is provided with a seventh insulating gap (277) at the seventh position (217); The third parasitic branch (243) includes a fifth connection point (225) and a sixth connection point (226), and the third parasitic branch (243) defines an eighth insulating gap (278) between the fifth connection point (225) and the sixth connection point (226); The first antenna (200) further includes a second switch (252), and the second switch (252) is coupled between the fifth connection point (215) and the sixth connection point (216).

28. The foldable electronic device (100) according to any one of claims 1 to 27, characterized in that When the first antenna (200) generates the first directional pattern and the second directional pattern, the operating frequency band of the first antenna (200) covers at least part of the frequency band from 1.5 GHz to 4.5 GHz.

29. The foldable electronic device (100) according to any one of claims 1 to 28, characterized in that The first feeding circuit (230) is used to transmit the radio frequency signal in the transmitting frequency band and the radio frequency signal in the receiving frequency band.

30. The foldable electronic device (100) according to any one of claims 1 to 28, characterized in that The foldable electronic device (100) being in an unfolded state means that the foldable electronic device (100) is in a flattened state.

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