Foldable electronic device

Abstract

The present application provides a foldable electronic device, comprising an antenna. A working frequency band of the antenna comprises a satellite communication frequency band. The antenna comprises a first radiator and a second radiator. A part of the conductive frame of a first housing serves as a first radiator; and a part of the conductive frame of a second housing serves as a second radiator. When the foldable electronic device is in an unfolded state, a parasitic resonance generated by the second radiator is close to a first resonance generated by the first radiator. The radiation characteristics of the antenna at the first resonance are improved by means of the parasitic resonance, so that a user gets better communication quality during satellite communication, thereby improving the user experience during the satellite communication.

Description

A foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311871918.9 and application name “A Foldable Electronic Device”, and the Chinese patent application filed with the China Patent Office on November 18, 2024, with application number 202411651410.2 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, the frame radiator is mainly used to form a linearly polarized antenna. When users use satellite communication, they need to point the electronic device at a specific direction to the sky to complete the communication connection with the satellite.

[0004] However, for foldable electronic devices, when unfolded, the radiation direction of the antenna may be deflected, increasing the difficulty of establishing a communication connection with the satellite and greatly affecting the user's communication experience. Summary of the Invention

[0005] The present application provides a foldable electronic device, which includes an antenna. The antenna uses the conductive part of the frame of the foldable electronic device as the main radiator and parasitic branches, which can enhance the user experience when conducting satellite communications.

[0006] In a first aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position, the first position and the second position are located on a first side of the first frame; the second frame comprises a third position and a fourth position, the third position is located on a second side of the second frame, and based on the foldable electronic device being in an unfolded state, the first side and the second side are the top side or the bottom side of the foldable electronic device; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is respectively connected to the first shell and the second shell body rotation connection; and an antenna, the antenna comprising: a first radiator and a second radiator, the first radiator being the conductive part of the first frame between the first position and the second position, and the second radiator being the conductive part of the second frame between the third position and the fourth position; and a feeding circuit, the first radiator comprising a feeding point, the feeding circuit being coupled to the feeding point; a first tuning circuit, the second radiator comprising a first connection point, the first tuning circuit being coupled and connected between the first connection point and the floor; wherein, based on the foldable electronic device being in an unfolded state, the first radiator is used to generate a first resonance, the resonant frequency band of the first resonance includes a satellite communication frequency band, and wherein the first radiator, the second radiator and the first tuning circuit are used to generate the directional pattern of the antenna.

[0007] According to an embodiment of the present application, when the foldable electronic device is in the unfolded state, the feeding circuit feeds an electrical signal, the first radiator generates a first resonance, and the second radiator and the first tuning circuit can be used to reduce the influence of the current on the floor on the directional pattern generated by the antenna. Since the influence of the current on the floor on the maximum radiation direction of the directional pattern generated by the antenna is reduced, the maximum radiation direction of the directional pattern generated by the antenna when the foldable electronic device is in the unfolded state has a smaller angle with the length direction of the electronic device, which facilitates the establishment of a communication connection with the satellite. Therefore, when conducting satellite communication, the foldable electronic device has good communication quality in the unfolded state, effectively improving the user experience. Moreover, since the influence of the current on the floor on the maximum radiation direction of the directional pattern generated by the antenna is reduced, the radiation direction of the antenna will not be significantly deflected, so that the user has better communication quality when conducting satellite communication, effectively improving the user experience.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the first frame defines a first gap and a second gap at the first position and the second position.

[0009] According to an embodiment of the present application, the current corresponding to the first resonance is primarily generated by the first radiator and is primarily concentrated on the first radiator. Multiple current modes are not generated on the floor, making it easier to determine the maximum radiation direction of the antenna's directional pattern. In one embodiment, this resonance can be understood as being generated by a linear DM mode.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the first frame defines a first gap at the first position, and the first frame is coupled to the floor at the second position.

[0011] 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 maximum radiation direction of the antenna's directional pattern is related to the second radiator and the first tuning circuit.

[0012] According to an embodiment of the present application, the first tuning circuit can be used to switch the maximum radiation direction of the directional pattern generated by the antenna. It can be understood that the first tuning circuit can make the parasitic resonance generated by the second radiator close to the first resonance by switching the equivalent electrical parameters (for example, equivalent capacitance, equivalent inductance or equivalent resistance, etc.) between the first connection point and the floor, thereby reducing the influence of the current on the floor on the maximum radiation direction of the directional pattern generated by the antenna. In one embodiment, due to the reduction of the influence of the current on the floor on the maximum radiation direction of the directional pattern generated by the antenna, the maximum radiation direction of the directional pattern generated by the antenna when the foldable electronic device is in the unfolded state is significantly deflected. In one embodiment, due to the reduction of the influence of the current on the floor on the maximum radiation direction of the directional pattern generated by the antenna, the maximum radiation direction of the directional pattern generated by the antenna when the foldable electronic device is in the unfolded state has a smaller angle with the length direction of the electronic device, which facilitates the establishment of a communication connection with the satellite. Therefore, when conducting satellite communication, the foldable electronic device has good communication quality in the unfolded state, effectively improving the user experience.

[0013] In combination with the first aspect, in certain implementations of the first aspect, based on the antenna operating in a satellite communication frequency band, when the foldable electronic device is in an unfolded state, the maximum radiation direction of the directional pattern generated by the antenna is a first direction; when the foldable electronic device is in a folded state, the maximum radiation direction of the directional pattern generated by the antenna is a second direction, and the angle between the first direction and the second direction is less than or equal to 30°.

[0014] According to an embodiment of the present application, the first direction and the second direction are roughly the same. When the foldable electronic device performs satellite communication, the state of the foldable electronic device is changed (folded state or unfolded state), and the foldable electronic device has good communication quality, which effectively improves the user experience.

[0015] In combination with the first aspect, in some implementations of the first aspect, the first tuning circuit and the second radiator are used to generate parasitic resonance, and the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 200 MHz.

[0016] According to an embodiment of the present application, when the foldable electronic device is in an unfolded state, the feeding circuit feeds an electrical signal, the first radiator is used to generate a first resonance (the resonant frequency band of the first resonance includes the satellite communication frequency band), and the second radiator is used to generate a parasitic resonance. The parasitic resonance is close to the first resonance (the difference between the resonant point frequency of the first resonance and the resonant point frequency of the parasitic resonance is less than or equal to 200MHz). The antenna can improve the radiation characteristics at the first resonance through parasitic resonance, thereby enabling users to have better communication quality when conducting satellite communications, effectively improving the user experience.

[0017] In combination with the first aspect, in some implementations of the first aspect, the antenna generates an efficiency pit at a first frequency point, and a frequency difference between a resonant point frequency of the first resonance and a frequency of the first frequency point is less than or equal to 200 MHz.

[0018] According to an embodiment of the present application, the coupling between the second radiator and the first radiator is weak and cannot excite the 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 partially excited by 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.

[0019] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in an unfolded state, a difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 50 MHz.

[0020] According to an embodiment of the present application, when the resonance point of the parasitic resonance is close to the resonance point of the first resonance (the frequency difference is less than 50 MHz), the coupling between the first radiator and the second radiator is strong. When the first radiator generates the first resonance, a strong current is generated on the second radiator. In one embodiment, at the resonance point of the first resonance, the current generated on the first radiator and the current generated on the second radiator are in the same direction. The current generated on the first radiator and the current generated on the second radiator can form an effect similar to a current array, so that the antenna has a strong linear polarization characteristic and the antenna has a higher directivity coefficient. Since the gain is related to the directivity coefficient, the gain of the antenna can be improved due to the higher directivity coefficient, so that the foldable electronic device has better satellite communication performance.

[0021] When the resonant point of the parasitic resonance is far away from the resonant point of the first resonance (the frequency difference is greater than or equal to 50 MHz and less than or equal to 200 MHz), the coupling between the first radiator and the second radiator is weakened. When the first radiator generates the first resonance, the current on the second radiator becomes relatively weak, which can stimulate the generation of partial longitudinal current on the floor, so that the antenna has circular polarization characteristics. In one embodiment, the resonant point frequency of the first resonance is higher than the resonant point frequency of the parasitic resonance, and the antenna has left-hand circular polarization characteristics. In one embodiment, the resonant point frequency of the first resonance is lower than the resonant point frequency of the parasitic resonance, and the antenna has right-hand circular polarization characteristics.

[0022] In combination with the first aspect, in some implementations of the first aspect, the antenna generates an efficiency pit at a first frequency point, and a frequency difference between a resonant point frequency of the first resonance and a frequency of the first frequency point is less than or equal to 50 MHz.

[0023] In combination with the first aspect, in some implementations of the first aspect, the first radiator is used to generate a main resonance, the first tuning circuit and the second radiator are used to generate a parasitic resonance, the resonance point of the parasitic resonance is located within the resonant frequency band of the main resonance, and the main resonance and the parasitic resonance together form the first resonance.

[0024] According to an embodiment of the present application, when the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than 50 MHz, it can be understood that the resonance point of the parasitic resonance is located within the resonance frequency band of the first resonance, the first radiator is used to generate the main resonance, the second radiator and the first tuning circuit are used to generate the parasitic resonance, and the main resonance and the parasitic resonance together form the above-mentioned first resonance.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the second frame defines a third slit and a fourth slit at the third position and the fourth position.

[0026] According to an embodiment of the present application, both ends of the second radiator are open ends, forming a structure similar to a dipole antenna. In one embodiment, the second radiator can operate in a half-wavelength mode.

[0027] In combination with the first aspect, in some implementations of the first aspect, the antenna further includes a second tuning circuit, the second radiator includes a second connection point, and the second tuning circuit is coupled between the second connection point and the floor.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the second frame defines a third slit at the third position, and the second frame is coupled to the floor at the fourth position.

[0029] According to an embodiment of the present application, one end of the second radiator is grounded and the other end is open, forming a structure similar to an IFA. In one embodiment, the second radiator can operate in a quarter-wavelength mode.

[0030] In combination with the first aspect, in certain implementations of the first aspect, the second radiator includes a second connection point and a third connection point, the second radiator has a fourth gap between the second connection point and the third connection point, and the second tuning circuit is coupled and connected between the second connection point and the third connection point.

[0031] According to an embodiment of the present application, a fourth slot is provided on the second radiator. The fourth slot can be regarded as an equivalent capacitor (e.g., a distributed capacitor) provided on the second radiator. The equivalent capacitor can enable the second radiator to form a metamaterial structure. The second radiator having the metamaterial structure can increase the radiation aperture. After the fourth slot is provided, the electric field is more dispersed, and the dielectric loss near the conductor is reduced, thereby effectively improving the system efficiency and radiation efficiency of the antenna. By coupling the second tuning circuit connected between the second connection point and the third connection point, the equivalent capacitance value of the fourth slot can be adjusted, thereby adjusting the radiation characteristics of the antenna (e.g., the resonant point frequency).

[0032] At the same time, the parasitic resonance of the second radiator can correspond to a quarter-wavelength mode (the second radiator can operate in a quarter-wavelength mode). Through the first resonant circuit and the fourth slot, the electrical length of the second radiator can be made greater than three-eighths of the first wavelength, the current on the second radiator is in the same direction (for example, not in reverse direction), and the electric field between the second radiator and the ground does not reverse direction. The electrical length of the second radiator increases from a quarter of the first wavelength to more than three-eighths of the first wavelength, but it still operates in a quarter-wavelength mode. In this case, the current density on the second radiator is dispersed, and the electric field density between the second radiator and the ground is weakened, thereby reducing the conductor loss and dielectric loss caused by the second radiator and the conductor and dielectric disposed around the second radiator, thereby improving the radiation characteristics of the antenna. The second radiator increases the radiation aperture, effectively improving the system efficiency and radiation efficiency of the antenna.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the distance between the second connection point and the fourth gap is less than or equal to 5 mm, and / or the distance between the third connection point and the fourth gap is less than or equal to 5 mm.

[0034] In combination with the first aspect, in certain implementations of the first aspect, the second connection point is located between the third position and the fourth gap, and the third connection point is located between the fourth position and the fourth gap; the first connection point is located between the third position and the second connection point, and the distance between the second connection point and the first connection point is greater than or equal to 0 mm and less than or equal to 5 mm; or, the first connection point is located between the fourth position and the third connection point, and the distance between the third connection point and the first connection point is greater than or equal to 0 mm and less than or equal to 5 mm.

[0035] According to the embodiment of the present application, the radiation aperture of the second radiator is adjusted simultaneously by the first tuning circuit and the second tuning circuit, thereby achieving parasitic resonance in a desired frequency band.

[0036] It should be understood that the first connection point can be located anywhere on the second radiator, and this is not a limitation in the present embodiment. When the length of the second radiator between the first connection point and the second / third connection point is less than or equal to 5 mm, the radiation aperture of the second radiator can be better adjusted, thereby improving the radiation characteristics of the antenna.

[0037] 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 fourth position is located between the second position and the third position.

[0038] According to the embodiment of the present application, the ground end (the end at the fourth position) of the second radiator may be close to the first radiator, and the open end (the end at the third position) may be far away from the first radiator.

[0039] 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; wherein 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; or, 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.

[0040] According to an embodiment of the present application, the technical solution described in the above embodiment can also be applied to a foldable electronic device including three shells.

[0041] In combination with the first aspect, in some implementations of the first aspect, the third shell includes a third frame, the third frame is at least partially spaced apart from the floor, the third frame has a fifth position and a sixth position, the fifth position is located on the third side of the third frame, based on the foldable electronic device being in an unfolded state, the first side, the second side and the third side are the same side of the foldable electronic device; the antenna also includes a third radiator and a third tuning circuit, the third radiator is the conductive part of the third frame between the fifth position and the sixth position, the third radiator includes a fourth connection point, and the third tuning circuit is coupled and connected between the fourth connection point and the floor.

[0042] In combination with the first aspect, in certain implementations of the first aspect, based on the second rotating shaft being located between the second shell and the third shell, the first radiator is used to generate a first resonance; based on the foldable electronic device being in an unfolded state, at the resonance point of the first resonance, the current on the first radiator and the current on the second radiator are in the same direction, and the current on the first radiator and the current on the third radiator are in opposite directions.

[0043] According to an embodiment of the present application, at the resonance point where the first resonance is generated on the first radiator, the current generated on the first radiator and the current generated on the second radiator are in the same direction, and the current generated on the first radiator and the current generated on the third radiator are in opposite directions (the fifth tuning circuit can be used to generate current in this direction). When the foldable electronic device is in the unfolded state, the reverse current generated on the third radiator can weaken the current generated on the first radiator, and the current generated on the second radiator can form an effect similar to a current array, thereby reducing the directivity coefficient of the antenna and making the antenna have a wider radiation beam (for example, a beam with a gain within 3dB of the maximum radiation direction).

[0044] In combination with the first aspect, in certain implementations of the first aspect, based on the second rotating shaft being located between the first shell and the third shell, the first radiator is used to generate a first resonance; based on the foldable electronic device being in an unfolded state, at the resonance point of the first resonance, the current on the first radiator, the current on the second radiator, and the current on the third radiator are in the same direction.

[0045] According to an embodiment of the present application, at the resonance point where the first radiator generates the first resonance, the current generated on the first radiator, the current generated on the second radiator, and the current generated on the third radiator are all in the same direction. The current generated on the first radiator, the current generated on the second radiator, and the current generated on the third radiator can form an effect similar to a current array, giving the antenna a strong linear polarization characteristic and a higher directivity coefficient. Because gain is related to directivity, the higher directivity coefficient can improve the gain of the antenna, allowing the foldable electronic device to have better satellite communication performance.

[0046] In combination with the first aspect, in some implementations of the first aspect, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap in a third direction, and the third direction is the thickness direction of the foldable electronic device.

[0047] According to an embodiment of the present application, the foldable electronic device is in a folded state, the first radiator and the second radiator at least partially overlap in the third direction, and when the feeding circuit feeds an electrical signal, the second radiator can couple to more energy, thereby improving the radiation characteristics of the parasitic resonance generated by the second radiator.

[0048] In combination with the first aspect, in certain implementations of the first aspect, the ratio of the dimensions of the floor along the extension direction of the first side when the foldable electronic device is in the unfolded state to that when the foldable electronic device is in the folded state is greater than or equal to 1.8 and less than or equal to 2.2.

[0049] In combination with the first aspect, in certain implementations of the first aspect, the foldable electronic device performs at least one of the following services in the satellite communication frequency band: satellite receiving and / or sending short messages, satellite calling and / or answering calls, and satellite data. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] FIG1 is a schematic structural diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0051] FIG2 is a schematic structural diagram of the foldable electronic device 100 in an outwardly folded state.

[0052] FIG3 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0053] FIG4 is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0054] FIG5 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0055] FIG6 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.

[0056] FIG7 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.

[0057] FIG8 is a schematic diagram of the maximum radiation direction of the directional pattern generated by the antenna 200 in the foldable electronic device 100 provided in an embodiment of the present application.

[0058] FIG9 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0059] FIG10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0060] FIG11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0061] FIG12 is a schematic diagram of a second radiator 240 provided in an embodiment of the present application.

[0062] FIG13 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0063] FIG. 14 shows the S-parameter simulation results of the antenna 200 in the foldable electronic device 100 .

[0064] FIG. 15 is a simulation result of the system efficiency of the antenna 200 in the foldable electronic device 100 .

[0065] FIG16 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided.

[0066] FIG17 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is lower than the resonance point frequency of the first resonance.

[0067] FIG18 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is close to the resonance point frequency of the first resonance.

[0068] FIG19 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is greater than the resonance point frequency of the first resonance.

[0069] FIG20 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0070] FIG21 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided.

[0071] FIG22 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is lower than the resonance point frequency of the first resonance.

[0072] FIG23 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is close to the resonance point frequency of the first resonance.

[0073] FIG24 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is greater than the resonance point frequency of the first resonance.

[0074] FIG25 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0075] FIG26 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0076] FIG. 27 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided.

[0077] FIG28 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is lower than the resonance point frequency of the first resonance.

[0078] FIG29 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is close to the resonance point frequency of the first resonance.

[0079] FIG30 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonance point frequency of the parasitic resonance is greater than the resonance point frequency of the first resonance.

[0080] Figure 31 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0081] Figure 32 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0082] Figure 33 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0083] FIG34 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided.

[0084] FIG35 is a directional diagram of the foldable electronic device 100 in the unfolded state when a second radiator is provided.

[0085] Figure 36 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0086] FIG37 is a directional diagram of the foldable electronic device 100 shown in FIG36 in the unfolded state at 2.2 GHz.

[0087] Figure 38 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0088] Figure 39 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0089] Figure 40 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0090] Figure 41 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0091] Figure 42 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0092] Figure 43 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0093] Figure 44 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0094] FIG45 is a schematic diagram of an electronic device 100 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0095] The following explains the terms that may appear in the embodiments of the present application.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] Component / device: includes at least one of lumped component / device and distributed component / device.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] In some embodiments, the electronic device may also include a test socket (also referred to as an RF socket or RF test socket). This test socket can be used to insert a coaxial cable to test the characteristics of the RF front-end circuit or the 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] End / Point: The "end / point" in the terms "first end / second end / feeding end / grounding end / feeding point / grounding point / connection point" of an antenna radiator should not be narrowly understood as an endpoint or end physically disconnected from other radiators. It can also be considered as a point or segment on a continuous radiator. In one embodiment, an "end / point" may include a connection / coupling area on an antenna radiator that couples to other conductive structures. For example, a feeding end / feeding point may be a coupling area on an antenna radiator that couples to a feeding structure or feeding circuit (e.g., an area facing a portion of the feeding circuit). In another example, a grounding end / grounding point may be a connection / coupling area on an antenna radiator that couples to a grounding structure or grounding circuit. Open End, Closed End: In some embodiments, open end and closed end refer to, for example, whether or not the antenna is grounded. A closed end is grounded, while an open end is not. In some embodiments, open end and closed end refer to, for example, other conductive bodies. A closed end is electrically connected to other conductive bodies, while an open end is not electrically connected to other conductive bodies. In one embodiment, an open end may 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 may also be referred to as a ground end or a short-circuit end. It should be understood that in some embodiments, other conductors may be coupled to each other through the open end to transfer coupling energy (which may be understood as transferring current).

[0115] 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).

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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:

[0126] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0127] 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.

[0128] 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: 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.

[0129] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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).

[0140] 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, etc. "Ground" can be used for grounding components in an electronic device. In one embodiment, "ground" can be the grounding layer of a circuit board of an electronic device, or it can be the grounding plate formed by the middle frame of the electronic device, or the grounding metal layer formed by the metal film under the screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as fiberglass, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a routing layer, and the routing layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, touch screen, input buttons, transmitter, processor, memory, battery, charging circuit, and system-on-chip (SoC) structures can be mounted on or connected to a circuit board, or electrically connected to a trace layer and / or ground layer in the circuit board. For example, a radio frequency source can be located on a trace layer.

[0141] 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.

[0142] Grounding refers to coupling to the ground / floor in any manner. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding at a specific location on the frame using a portion of the midframe's structural components (or referred to as a physical ground). In one embodiment, grounding can be achieved through device grounding, such as through a series or parallel connection of a capacitor, inductor, or resistor (or referred to as a device ground).

[0143] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0144] Figure 1 is a schematic diagram 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 1 is described using a foldable mobile phone as an example.

[0145] 1 , a foldable electronic device 100 may include a flexible display 110, a first frame 121, a first cover 122, a second frame 123, 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 and a second housing 127 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.

[0146] FIG1 is filled with a dot matrix pattern to schematically represent a flexible display screen 110. The flexible display screen 110 can have the characteristics of strong flexibility and bendability, and can provide users with a new interaction method based on the bendable characteristics. The display panel of the flexible display screen 110 can, for example, adopt any one of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc., and the embodiments of the present application are not limited to this.

[0147] 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 .

[0148] 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.

[0149] 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.

[0150] 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.

[0151] The frame 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 cover to ensure a good radiation environment for the antenna radiator. In one embodiment, the cover can be provided with a slit in this portion of the frame serving as the radiator to facilitate antenna radiation.

[0152] The antenna of the electronic device 100 can also be set within the frame. When the frame of the electronic device 100 is a non-conductive material, the antenna radiator can be located within the electronic device 100 and arranged along the frame. For example, the antenna radiator is set close to the frame to minimize the volume occupied by the antenna radiator and be closer to the outside of the electronic device 100 to achieve better signal transmission effect. It should be noted that the antenna radiator is set close to the frame means that the antenna radiator can be set close to the frame, or it can be set close to the frame, for example, there can be a certain small gap between the antenna radiator and the frame.

[0153] 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 cover, frame, and / or display, or by a non-conductive gap / aperture formed between any of these. The antenna clearance ensures the antenna's radiation performance. 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, the antenna can be based on a flexible printed circuit (FPC), a laser-direct-structuring (LDS) antenna, or a microstrip disk antenna (MDA). In one embodiment, the antenna can also be a transparent structure embedded within the display screen of electronic device 100, such that the antenna is a transparent antenna unit embedded within the display screen of electronic device 100.

[0154] The foldable electronic device 100 may also include a printed circuit board (PCB) (not shown). The PCB is located within the cavity formed by the cover. The PCB can be made of a flame-resistant material (FR-4), a Rogers dielectric, or a mixture of Rogers and FR-4. FR-4 is a designation for a flame-resistant material grade, and Rogers dielectric refers to a high-frequency board. The PCB 17 carries electronic components, such as radio frequency chips. In one embodiment, a metal layer may be provided on the PCB. This metal layer can be used to ground the electronic components carried on the PCB, as well as other components such as a bracket antenna or a frame antenna. This metal layer may be referred to as a floor, ground plane, or grounding layer. In one embodiment, the metal layer can be formed by etching metal onto the surface of any dielectric layer in the PCB. In one embodiment, the metal layer used for grounding can be provided on the side of the PCB proximal to the flexible display 110. In one embodiment, the edge of the PCB can be considered the edge of its grounding layer. The electronic device 100 may also have other floor / ground planes / grounding layers, as previously described and not further described here.

[0155] 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.

[0156] 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.

[0157] The foldable electronic device 100 shown in FIG1 is currently in an unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°. The flexible display 110 can be in the unfolded state as shown in FIG1 .

[0158] FIG2 illustrates a possible folded state of the foldable electronic device 100. FIG2 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 FIG2 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 FIG1 and FIG2 .

[0159] 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.

[0160] 1 and 2 , 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.

[0161] 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.

[0162] 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 space occupied by the foldable electronic device 100 is relatively small; 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 range.

[0163] The foldable electronic device 100 may further include a third housing 128 and a hinge 129, as shown in FIG3 . 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.

[0164] In the foldable electronic device 100 shown in Figure 3, since it has three foldable parts (first shell 126, second shell 127 and third shell 128), the foldable electronic device 100 has three forms: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0165] 1. As shown in FIG3 , 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.

[0166] 2. Figure 4 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.

[0167] It should be understood that for the sake of simplicity, in the structure shown in FIG4 , 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.

[0168] 3. As shown in FIG5 , 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.

[0169] FIG. 1 only schematically illustrates some components of the electronic device 100 , and the actual shapes, sizes, and structures of these components are not limited by FIG. 1 .

[0170] 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.

[0171] 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.

[0172] First, Figures 6 and 7 will introduce the two antenna modes involved in this application. Figure 6 is a schematic diagram of the common-mode structure of an antenna provided in this application and the corresponding current and electric field distribution. Figure 7 is a schematic diagram of the differential-mode structure of another antenna provided in this application and the corresponding current and electric field distribution. The antenna radiators in Figures 6 and 7 are open at both ends, and their common-mode mode and differential-mode mode can be referred to as line common-mode mode and line differential-mode mode, respectively.

[0173] It should be understood that the “common-differential mode” or “CM-DM mode” in this application refers to a line common mode mode and a line differential mode mode generated on the same radiator.

[0174] 1. Wire common mode (CM) mode

[0175] (a) in Figure 6 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).

[0176] 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 .

[0177] (b) in FIG6 shows the current and electric field distribution of the antenna 40. As shown in (b) in FIG6, 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 FIG6, 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 FIG6 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 FIG6 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 FIG6 can be respectively referred to as the current and electric field of the line CM mode.

[0178] 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 FIG6(b). The electric field is weaker at the center 41 of the antenna 40 and stronger at both ends of the antenna 40.

[0179] 2. Line differential mode (DM) mode

[0180] As shown in Figure 7(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.

[0181] 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°.

[0182] Figure 7(b) shows the current and electric field distribution of antenna 50. As shown in Figure 7(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 7(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 7(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 7(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 7(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 7(b) can also be referred to as a half-antenna mode, a half-wavelength mode, or simply a half-mode.

[0183] 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 FIG7(b). The electric field is weaker at the center 51 of the antenna 50 and stronger at both ends of the wire antenna 50.

[0184] 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 FIG6 , or two, as shown in FIG7 , 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 FIG7 , 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 into the two ends close to each other, and an effect similar to the antenna structure shown in FIG6 can also be obtained. Correspondingly, for the line DM mode, one radiator can be used as shown in FIG6 , 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 FIG7 can also be obtained.

[0185] 3. Line CM-DM mode

[0186] FIG6 and FIG7 above 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.

[0187] When the antenna uses asymmetric feeding (the feeding point is offset from the center of the radiator, including side feeding 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 6(b). The second resonance corresponds to the linear DM mode, with the current and electric field distributions shown in Figure 7(b).

[0188] FIG8 is a schematic diagram of the maximum radiation direction of the directional pattern generated by the antenna 200 in the foldable electronic device 100 provided in an embodiment of the present application.

[0189] It should be understood that for the sake of simplicity, the foldable device 100 is described as including only the first housing 201 and the second housing 202. The first housing 201 and the second housing 202 can be rotatably connected to the shaft 203.

[0190] As shown in (a) of FIG. 8 , in the folded state, the maximum radiation direction of the directional pattern generated by the antenna 200 is in the top direction of the foldable electronic device 100 (eg, the y direction).

[0191] As shown in (b) of Figure 8, in the unfolded state, due to the increase in the size of the floor 300 in the x-direction, the current on the floor 300 will affect the maximum radiation direction of the directional pattern generated by the antenna 200, causing it to deviate from the top direction (e.g., the y-direction) (e.g., deflect toward the x-direction).

[0192] When the user conducts satellite communication, the electronic device needs to be pointed at the satellite in a specific orientation to achieve star alignment (establishing a communication connection with the satellite). When the foldable electronic device 100 is in the unfolded state, the maximum radiation direction of the directional pattern generated by the antenna 200 deviates from the top direction of the foldable electronic device 100 (for example, the y direction), and the user needs to adjust the posture of holding the foldable electronic device 100 to communicate with the satellite. Secondly, the maximum radiation direction of the directional pattern generated by the antenna 200 when the foldable electronic device 100 is in the folded state and the unfolded state is different. Therefore, when the user switches the state of the foldable electronic device 100 when conducting satellite communication, if the user does not change the posture of holding the foldable electronic device 100, the communication quality deteriorates. In order to improve the communication quality, the user needs to adjust the posture of holding the foldable electronic device 100 so that the maximum radiation direction points to the satellite, in order to obtain better communication quality, which causes great inconvenience in use.

[0193] If, when the foldable electronic device 100 is in the unfolded state, the maximum radiation direction of the directional pattern generated by the antenna 200 basically points to the top direction of the electronic device 100 (for example, the y direction), for example, has an angle within a predetermined angle with the y direction, when performing satellite communication, it is possible to conveniently establish a communication connection with the satellite through the foldable electronic device 100. Secondly, if the maximum radiation direction of the directional pattern generated by the antenna 200 is the same when the foldable electronic device 100 is in the folded state and the unfolded state (for example, both are the top direction of the foldable electronic device 100 (for example, the y direction), when performing satellite communication, the user does not need to change the posture of holding the foldable electronic device 100 when changing the state of the foldable electronic device 100 (folded state or unfolded state).

[0194] An embodiment of the present application provides a foldable electronic device, which includes an antenna. The antenna uses a conductive part of the frame of the foldable electronic device as a main radiator and a parasitic branch, which can enhance the user experience when conducting satellite communications.

[0195] FIG9 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0196] As shown in FIG. 9 , the foldable electronic device 100 may include a first housing 201 , a second housing 202 , and a floor 300 .

[0197] 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 unfolded 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.

[0198] 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.

[0199] 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.

[0200] The first frame 210 includes a first position 211 and a second position 212. The first frame 210 defines a first gap and a second gap at the first position 211 and the second position 212, respectively.

[0201] In one embodiment, the width of the first gap / the second gap is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that the width of the gaps provided on the frame in the embodiment of the present application can be within the above range.

[0202] The second frame 220 includes a third position 213 and a fourth position 214. The second frame 220 defines a third gap at the third position 213. In one embodiment, the second frame 220 is coupled to the floor 300 at the fourth position 214. In one embodiment, when the foldable electronic device 100 is in the unfolded state, the fourth position 214 is located between the second position 212 and the third position 213.

[0203] It should be understood that in the embodiments of the present application, the coupling connection is described only as an electrical connection. In actual production or practice, it can also be achieved through indirect coupling. For the sake of brevity, this will not be described in detail. At the same time, for the sake of brevity, the embodiments of the present application are described only as an example of the fourth position 214 being located between the second position 212 and the third position 213. In actual production or design, the third position 213 can also be located between the second position 212 and the fourth position 214.

[0204] The first position 211 and the second position 212 can be located at the first side of the first frame 210, and the third position 213 can be located at the second side of the second frame 220. In one embodiment, the fourth position 214 can be located at the second side of the second frame 220. When the foldable electronic device 100 is in the unfolded state, the first side and the second side can be the same side of the foldable electronic device 100, for example, the top side or the bottom side. In one embodiment, the ratio of the dimension of the floor 300 along the extension direction of the first side when the foldable electronic device 100 is in the unfolded state to the dimension of the foldable electronic device 100 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 folded state is greater than or equal to 1.8 and less than or equal to 2.2.

[0205] The foldable electronic device 100 may further include a hinge 203. The hinge 203 is located between the first housing 201 and the second housing 202 and is rotatably connected to each of the first and second housings 201, 202, allowing the first and second housings 201, 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 and second portions may be connected by the hinge 203.

[0206] It should be understood that in the foldable electronic device 100 shown in FIG9 , the hinge 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 hinge 203 is rotatably connected to the first and second housings 201 and 202," including the case where the hinge 203 is rotatably connected to the first or second housing via one or more second hinges and one or more intermediate housings. For example, in one embodiment, the foldable electronic device 100 may further include a first hinge and a second hinge, and one or more intermediate housings located between the first and second hinges. The first hinge 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 hinge is located between the intermediate and second housings 202, and the hinge 203 is rotatably connected to the intermediate and intermediate housings, respectively, enabling relative rotation of the intermediate and intermediate housings 202.

[0207] The foldable electronic device 100 may further include an antenna 200 . The antenna 200 includes a first radiator 230 , a second radiator 240 , a feeding circuit 250 , and a first tuning circuit 261 .

[0208] The first radiator 230 is a conductive portion of the first frame 210 between the first position 211 and the second position 212 , and the second radiator 240 is a conductive portion of the second frame 220 between the third position 213 and the fourth position 214 .

[0209] The first radiator 230 includes a feeding point 251 , and the feeding circuit 250 is coupled to the feeding point 251 .

[0210] The second radiator 240 includes a first connection point 221 , and the first tuning circuit 261 is coupled between the first connection point 221 and the floor 300 .

[0211] The operating frequency band of antenna 200 may include a satellite communication frequency band. When the foldable electronic device 100 is in the unfolded state, the first radiator 230 is configured to generate a first resonance, and the resonant frequency band of the first resonance includes a satellite communication frequency band. Satellite communication includes at least one of satellite-based short message (SMS) reception and / or transmission, satellite-based calling and / or receiving, and satellite-based data (e.g., internet access).

[0212] 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 (2500MHz-2520MHz) and the receive frequency band (2670MHz-2690MHz) 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.

[0213] In one embodiment, when the antenna 200 operates in the Tiantong satellite system (the operating frequency band of the antenna 200 includes at least part of the frequency band of the Tiantong satellite system), the foldable electronic device 100 can perform voice communication through the antenna 200. In one embodiment, when the antenna 200 operates in the Beidou satellite system (the operating frequency band of the antenna 200 includes at least part of the frequency band of the Beidou satellite system), the foldable electronic device 100 can send or receive short messages and pictures through the antenna 200.

[0214] The first radiator 230 , the second radiator 240 and the first tuning circuit 261 are used to generate a directional pattern of the antenna. In one embodiment, the maximum radiation direction of the directional pattern of the antenna 200 is related to the second radiator 240 and the first tuning circuit 261 .

[0215] It should be understood that when the foldable electronic device 100 is in the unfolded state, the feed circuit 250 feeds an electrical signal, causing the first radiator 230 to generate a first resonance. The second radiator 240 and the first tuning circuit 261 can be used to reduce the impact of the current on the floor 300 on the antenna's directional pattern. By reducing the impact of the current on the floor 300 on the maximum radiation direction of the antenna's directional pattern, the angle between the maximum radiation direction of the antenna 200's directional pattern when the foldable electronic device 100 is in the unfolded state and the longitudinal direction of the foldable electronic device 100 (e.g., the y-direction) is smaller, facilitating communication with the satellite. Therefore, when conducting satellite communications, the foldable electronic device 100 has excellent communication quality in the unfolded state, effectively improving the user experience. Furthermore, by reducing the impact of the current on the floor 300 on the maximum radiation direction of the antenna's directional pattern, the radiation direction of the antenna 200 does not deviate significantly, thereby providing users with better communication quality during satellite communications and effectively improving the user experience.

[0216] At the same time, the first resonance is 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 230 and is concentrated on the first radiator 230, multiple current modes are not generated on the floor 300, making it easy to determine the maximum radiation direction of the directional pattern generated by the antenna 200.

[0217] 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.

[0218] In one embodiment, the foldable electronic device 100 is in the unfolded state, and the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 200 MHz, so that the current on the floor 300 has less impact on the maximum radiation direction of the directional pattern generated by the antenna 200.

[0219] It should be understood that the frequency difference described in the embodiments of the present application can be understood as the absolute value of the difference between the two frequencies. In one embodiment, the resonance point frequency of the first resonance can be higher than the resonance point frequency of the parasitic resonance. In one embodiment, the resonance point frequency of the first resonance can be lower than the resonance point frequency of the parasitic resonance.

[0220] It should be understood that when the foldable electronic device 100 is in the unfolded state, the feeding circuit 250 feeds an electrical signal, the first radiator 230 is used to generate a first resonance (the resonant frequency band of the first resonance includes the satellite communication frequency band), and the second radiator 240 is used to generate a parasitic resonance. The parasitic resonance is close to the first resonance (the difference between the resonant point frequency of the first resonance and the resonant point frequency of the parasitic resonance is less than or equal to 200MHz). The antenna 200 can improve the radiation characteristics at the first resonance through parasitic resonance, thereby enabling users to have better communication quality when conducting satellite communications, effectively improving the user experience.

[0221] In one embodiment, the maximum radiation direction of the directional pattern generated by the antenna 200 when the foldable electronic device 100 is in the unfolded state is a first direction, and the maximum radiation direction of the directional pattern generated by the antenna 200 when the foldable electronic device 100 is in the folded state is a second direction. The fact that the maximum radiation directions of the directional patterns generated by the antenna 200 when the foldable electronic device 100 is in the folded state and the unfolded state are substantially the same can be understood as meaning that the angle between the first direction and the second direction is less than or equal to 30°.

[0222] It should be understood that the first direction and the second direction are roughly the same. When the foldable electronic device 100 performs satellite communication, the state of the foldable electronic device 100 is changed (folded state or unfolded state), and the user does not need to change the posture of holding the foldable electronic device 100, which effectively improves the user experience.

[0223] In one embodiment, when the foldable electronic device 100 is in the unfolded state, the first tuning circuit 261 can be used to switch the maximum radiation direction of the directional pattern generated by the antenna 200.

[0224] It should be understood that the first tuning circuit 261 can be used to switch the maximum radiation direction of the directional pattern generated by the antenna 200. This can be understood as the first tuning circuit 261 being able to adjust the equivalent electrical parameters (e.g., equivalent capacitance, equivalent inductance, or equivalent resistance) between the first connection point 221 and the floor 300 to bring the parasitic resonance generated by the second radiator 240 closer to the first resonance, thereby reducing the impact of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200. Due to the reduced impact of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200, the maximum radiation direction of the directional pattern generated by the antenna 200 when the foldable electronic device 100 is in the unfolded state has a smaller angle with the longitudinal direction of the foldable electronic device (e.g., the y-direction), facilitating communication with the satellite. Therefore, when conducting satellite communication, the foldable electronic device 100 has good communication quality in the unfolded state, effectively improving the user experience. Furthermore, because the effect of the current on the floor 300 on the maximum radiation direction of the antenna's pattern is reduced, the maximum radiation direction of the pattern generated by the antenna 200 is substantially the same when the foldable electronic device 100 is in the folded state and the unfolded state. Therefore, when performing satellite communications, the user does not need to change the position in which the foldable electronic device 100 is held to change state (folded or unfolded), effectively improving the user experience.

[0225] In one embodiment, the foldable electronic device 100 is in the unfolded state, and the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than 50 MHz.

[0226] It should be understood that when the resonance point of the parasitic resonance is close to the resonance point of the first resonance (the frequency difference is less than 50 MHz), the coupling between the first radiator 230 and the second radiator 240 is strong. When the first radiator 230 generates the first resonance, a strong current is generated on the second radiator 240. In one embodiment, at the resonance point of the first resonance, the current generated on the first radiator 230 and the current generated on the second radiator 240 are in the same direction. The current generated on the first radiator 230 and the current generated on the second radiator 240 can form an effect similar to a current array, so that the antenna 200 has a strong linear polarization characteristic and the antenna 200 has a higher directivity coefficient. Since the gain is related to the directivity coefficient, the gain of the antenna 200 can be improved due to the higher directivity coefficient, so that the foldable electronic device 100 has better satellite communication performance.

[0227] At the same time, when the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than 50 MHz, it can be understood that the resonance point of the parasitic resonance is located within the resonance frequency band of the first resonance, the first radiator 230 is used to generate the main resonance, the second radiator 240 and the first tuning circuit 261 are used to generate the parasitic resonance, and the main resonance and the parasitic resonance together form the above-mentioned first resonance.

[0228] In one embodiment, the foldable electronic device 100 is in the unfolded state, and the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is greater than or equal to 50 MHz and less than or equal to 200 MHz.

[0229] It should be understood that when the resonant point of the parasitic resonance is far from the resonant point of the first resonance (the frequency difference is greater than or equal to 50 MHz and less than or equal to 200 MHz), the coupling between the first radiator 230 and the second radiator 240 is weakened. When the first radiator 230 generates the first resonance, the current in the second radiator 240 becomes relatively weak, which can stimulate the generation of some longitudinal current in the floor 300, giving the antenna 200 a circularly polarized characteristic. In one embodiment, the resonant point frequency of the first resonance is higher than the resonant point frequency of the parasitic resonance, and the antenna 200 has a left-hand circular polarization characteristic. In one embodiment, the resonant point frequency of the first resonance is lower than the resonant point frequency of the parasitic resonance, and the antenna 200 has a right-hand circular polarization characteristic.

[0230] It should be understood that in the implementation of the present application, the coupling between the second radiator 240 and the first radiator 230 is weak and cannot excite the 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 partially excited by 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.

[0231] In one embodiment, the foldable electronic device 100 is in the folded state, and the first radiator 230 and the second radiator 240 are adjacent to each other in the third direction (for example, no other conductor is disposed between the first radiator 230 and the second radiator 240), as shown in Figure 10. In one embodiment, the first slit / second slit defined in the first frame 210 is aligned with the third slit defined in the second frame 220 to enhance the aesthetics of the foldable electronic device 100.

[0232] The third direction can be understood as the thickness direction of the foldable electronic device 100, or, in the unfolded state, the direction perpendicular to the display screen, for example, the z direction.

[0233] It should be understood that in the embodiment of the present application, alignment can be understood as the two slots at least partially overlapping in the third direction. When the two slots completely overlap in the third direction, the radiation characteristics of the parasitic resonance generated by the second radiator are optimal.

[0234] In one embodiment, the foldable electronic device 100 is in a folded state, and the parasitic resonance can also be used to improve the radiation characteristics of the first resonance (eg, radiation efficiency and system efficiency).

[0235] In one embodiment, the foldable electronic device 100 is in the folded state, and the first radiator 230 and the second radiator 240 at least partially overlap in the third direction.

[0236] It should be understood that when the foldable electronic device 100 is in a folded state, the first gap / second gap opened in the first frame 210 is aligned with the third gap opened in the second frame 220. When the feeding circuit 250 feeds in an electrical signal, the third gap can couple to more energy through the electric field at the gap opened in the first frame 210, thereby enhancing the radiation characteristics of the parasitic resonance generated by the second radiator 240.

[0237] In one embodiment, the foldable electronic device 100 is in a folded state, and the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 200 MHz, so that the antenna 200 has better radiation characteristics (for example, radiation efficiency and system efficiency).

[0238] In one embodiment, the foldable electronic device 100 is in the folded state, and at the resonance point of the first resonance, the current on the first radiator 230 and the current on the second radiator 240 are in the same direction.

[0239] In one embodiment, the fourth position 214 can be located at the second side of the second frame 220. In one embodiment, the fourth position 214 can be located between the third position 213 and the rotation axis 203, with the third gap aligned with the second gap. In one embodiment, the third position 213 can be located between the fourth position 214 and the rotation axis 203, with the third gap aligned with the first gap.

[0240] In one embodiment, the fourth position 214 may be located on a third side of the second frame 220, where the second side and the third side intersect at an angle, as shown in Figure 11. In one embodiment, the third gap is aligned with the first gap.

[0241] In one embodiment, first tuning circuit 261 is a circuit including a switch, as shown in FIG12(a). The switch can be used to switch between electronic components with different resistance, capacitance, or inductance values ​​coupled to first connection point 221 in different circuit states. The switch can be electrically connected between the electronic component and first connection point 221, or between the electronic component and floor panel 300. Alternatively, the switch can be in an open state, disconnecting the electronic component from the first connection point 221. Alternatively, the switch can directly couple floor panel 300 to first connection point 221, without any electronic component interposed between the two.

[0242] In one embodiment, the first tuning circuit 261 does not include a switch, and may be a circuit formed by cascading multiple electronic components, as shown in (b) of Figure 12. The first tuning circuit 261 may have different equivalent capacitance values ​​or equivalent inductance values ​​at different frequencies.

[0243] It should be understood that the tuning circuits in the embodiments of the present application can be understood with reference to the above description. For the sake of brevity, they will not be described one by one.

[0244] In one embodiment, the length of the conductor portion of the second frame between the first connection point 221 and the third position 213 is less than or equal to 5 mm.

[0245] It should be understood that since the third position 213 is provided with a third gap, there is a stronger electric field at the third gap. When the first connection point 221 is close to the third gap, the first tuning circuit 261 has better tuning characteristics.

[0246] In one embodiment, the first frame 210 includes a fifth position 215. The first frame 210 is coupled to the floor 300 at the fifth position 215, as shown in FIG13 . The antenna 200 may also include a third radiator 260. In one embodiment, the third radiator 260 may generate a second resonance to improve the radiation characteristics (e.g., radiation efficiency) of the first resonance.

[0247] In one embodiment, the resonance point frequency of the second resonance is higher than the resonance point frequency of the first resonance.

[0248] In one embodiment, the third radiator 260 may also be used to generate a second resonance.

[0249] It should be understood that in the above embodiment, only the first radiator 230 serves as the main radiating branch (the radiator including the feed point). In one embodiment, the third radiator 260 can also be a feed point, so that the third radiator 260 generates a second resonance. In one embodiment, the feed point of the first radiator 230 can be used to feed an RF signal in a transmit frequency band within the satellite communication frequency band. The feed point of the third radiator 260 can be used to feed an RF signal in a receive frequency band within the satellite communication frequency band.

[0250] Figures 14 and 15 are simulation results of the unfolded foldable electronic device 100 shown in Figure 13 . Figure 14 shows the S-parameter simulation results of the antenna 200 in the foldable electronic device 100 . Figure 15 shows the system efficiency simulation results of the antenna 200 in the foldable electronic device 100 .

[0251] It should be understood that the simulation results shown in Figures 14 and 15 show the simulation results when the antenna 200 does not include the second radiator 240, as well as the simulation results when the antenna includes the second radiator 240 and the resonance point frequency of the parasitic resonance is less than the resonance point frequency of the first resonance, the resonance point frequency of the parasitic resonance is close to the resonance point frequency of the first resonance, and the resonance point frequency of the parasitic resonance is greater than the resonance point frequency of the first resonance.

[0252] As shown in Figure 14, the antenna 200 resonates at around 2.2 GHz and around 2.6 GHz. The resonance at around 2.2 GHz corresponds to the first resonance in the above embodiment, and the resonance at around 2.6 GHz corresponds to the second resonance in the above embodiment.

[0253] It should be understood that since the first radiator and the third radiator are located in the first shell and the second radiator is located in the second shell, the coupling between the second radiator and the first radiator is relatively weak, and the parasitic resonance generated by the second radiator has a weak effect on the S parameter of the first resonance (not shown in the S parameter curve).

[0254] As shown in FIG. 15 , when the second radiator 240 is not provided, the system efficiency curve does not have a pit.

[0255] After setting the second radiator 240, by adjusting the electrical parameters of the second radiator (for example, the equivalent capacitance value or the equivalent inductance value of the tuning circuit), the resonant point frequency of the parasitic resonance (the pit of system efficiency) can be made lower than the resonant point frequency of the first resonance, close to the resonant point frequency of the first resonance, or higher than the resonant point frequency of the first resonance.

[0256] Figures 16 to 19 are directional diagrams of the foldable electronic device 100 shown in Figure 13 in the unfolded state at 2.2 GHz. Figure 16 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided. Figure 17 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is less than the resonant point frequency of the first resonance. Figure 18 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is close to the resonant point frequency of the first resonance. Figure 19 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is greater than the resonant point frequency of the first resonance.

[0257] As shown in Figure 16, when the foldable electronic device is unfolded without the second radiator, the current on the floor affects the maximum radiation direction of the antenna's pattern, causing it to deviate from the top direction (for example, the y-direction). Without the second radiator, the antenna's directivity coefficient is 3.72 dBi.

[0258] After setting the second radiator, when the foldable electronic device is in the unfolded state, the influence of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna is reduced, so that the maximum radiation direction does not deviate from the top direction (for example, the y direction), and the radiated energy is more concentrated, as shown in Figures 17 to 19.

[0259] When the resonant frequency of the parasitic resonance is lower than the resonant frequency of the first resonance, the antenna's directivity is 4.16 dBi. When the resonant frequency of the parasitic resonance is close to the resonant frequency of the first resonance, the antenna's directivity is 5.08 dBi. When the resonant frequency of the parasitic resonance is higher than the resonant frequency of the first resonance, the antenna's directivity is 4.64 dBi.

[0260] It should be understood that a larger directivity coefficient indicates that the antenna radiates a greater proportion of energy in a particular direction, and the energy radiation is more concentrated. When the directivity coefficient of an antenna is high, the antenna radiates a higher proportion of energy in the direction of maximum radiation, and the antenna has higher gain in this direction, enabling electronic devices to have good communication performance.

[0261] FIG20 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0262] As shown in FIG. 20 , the second frame 220 defines a fourth gap at the fourth position 214 .

[0263] It should be understood that the difference between the antenna 200 shown in Figure 20 and the antenna 200 shown in Figure 9 is that the fourth slot is provided at the fourth position 214. In the antenna 200 shown in Figure 9, the second frame 220 is coupled to the floor 300 at the fourth position 214, and one end of the second radiator 240 is grounded and the other end is open, forming a structure similar to an IFA, and the second radiator 240 can operate in a quarter-wavelength mode. In the antenna 200 shown in Figure 20, the second frame 220 has a fourth slot provided at the fourth position 214, and both ends of the second radiator 240 are open, forming a structure similar to a dipole, and the second radiator 240 can operate in a half-wavelength mode.

[0264] In one embodiment, the antenna 200 further includes a second tuning circuit 262 . The second radiator 240 includes a second connection point 222 , and the second tuning circuit 262 is coupled between the second connection point 222 and the ground plane 300 .

[0265] It should be understood that the second radiator 240 is coupled to the first tuning circuit 261 and the second tuning circuit 262.

[0266] In one embodiment, the length of the conductor portion of the second frame between the second connection point 222 and the fourth position 214 is less than or equal to 5 mm.

[0267] In one embodiment, when the foldable electronic device 100 is in the folded state, the third gap is aligned with the first gap, and the fourth gap is aligned with the second gap.

[0268] It should be understood that since the fourth position 214 is provided with a fourth gap, there is a stronger electric field at the fourth gap. Therefore, when the second connection point 222 is close to the fourth gap, the second tuning circuit 262 has better tuning characteristics.

[0269] For the sake of simplicity, parts of the antenna 200 shown in FIG20 that are similar to those of the antenna 200 shown in FIG9 will not be described in detail, for example, the position of the first radiator 230; the frequency band of satellite communication; the frequency difference between the first resonance generated by the first radiator 230 and the parasitic resonance generated by the second radiator 240; the relative positions of the first radiator 230 and the second radiator 240, etc.

[0270] Figures 21 to 24 are directional diagrams of the foldable electronic device 100 shown in Figure 20 in the unfolded state at 2.2 GHz. Figure 21 is a directional diagram of the foldable electronic device 100 in the unfolded state when the second radiator is not provided. Figure 22 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is less than the resonant point frequency of the first resonance. Figure 23 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is close to the resonant point frequency of the first resonance. Figure 24 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is greater than the resonant point frequency of the first resonance.

[0271] As shown in Figure 21, when the second radiator is not installed and the foldable electronic device is in the unfolded state, the current on the floor will affect the maximum radiation direction of the antenna's pattern, causing it to deviate from the top direction (for example, the y direction). Without the second radiator, the antenna's directivity coefficient is 3.53dBi.

[0272] After setting the second radiator, when the foldable electronic device is in the unfolded state, the influence of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna is reduced, so that the maximum radiation direction does not deviate from the top direction (for example, the y direction), and the radiated energy is more concentrated, as shown in Figures 22 to 24.

[0273] When the resonant frequency of the parasitic resonance is lower than the resonant frequency of the first resonance, the antenna's directivity is 4.83 dBi. When the resonant frequency of the parasitic resonance is close to the resonant frequency of the first resonance, the antenna's directivity is 4.73 dBi. When the resonant frequency of the parasitic resonance is higher than the resonant frequency of the first resonance, the antenna's directivity is 4.86 dBi.

[0274] FIG25 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0275] 25 , the second frame 220 defines a third gap at the third position 213. The second frame 220 is coupled to the floor 300 at the fourth position 214. The second frame 220 defines a fourth gap between the third position 213 and the fourth position 214.

[0276] It should be understood that the second radiator 240 is electrically connected to the floor 300 at the first connection point 221 via the first tuning circuit 261. This allows the current on the second radiator 240 to be shunted in the area near the first connection point 221 when the second radiator 240 generates parasitic resonance. This shunting in the area near the first connection point 221 disperses the current density on the second radiator 240. In one embodiment, the current distribution on the second radiator 240 is relatively more dispersed, thereby reducing the conductor loss of the second radiator 240. In one embodiment, the relatively more dispersed current distribution on the second radiator 240 can increase the radiation aperture of the second radiator 240. The reduced conductor loss of the second radiator 240 and the increased radiation aperture of the antenna 200 can improve the system efficiency and radiation efficiency of the antenna.

[0277] At the same time, a fourth slot is provided on the second radiator 240. This fourth slot can be regarded as an equivalent capacitor (e.g., a distributed capacitor) provided on the second radiator 240. This equivalent capacitor can form a metamaterial structure on the second radiator 240. The second radiator 240 having this metamaterial structure can increase the radiation aperture. After the fourth slot is provided, the electric field is more dispersed, and the dielectric loss near the conductor is reduced, thereby effectively improving the system efficiency and radiation efficiency of the antenna 200. By coupling the second tuning circuit 262 connected between the second connection point 222 and the third connection point 223, the equivalent capacitance value of the fourth slot can be adjusted, thereby adjusting the radiation characteristics of the antenna 200 (e.g., the resonant point frequency).

[0278] It should be understood that the antenna 200 shown in FIG25 differs from the antenna 200 shown in FIG9 only in the location of the first connection point 221 and the fourth slot. In both the antennas 200 shown in FIG9 and FIG25 , the second radiator 240 has an IFA-like structure with one end grounded and the other end open, and both operate in a quarter-wavelength mode. However, in the antenna 200 shown in FIG25 , the second radiator 240 forms a metamaterial structure, and its length is greater than that of the second radiator 240 shown in FIG9 .

[0279] In one embodiment, in the antenna 200 shown in FIG9 , the electrical length of the second radiator 240 is one-quarter of the first wavelength, which may be the wavelength corresponding to the parasitic resonance. In one embodiment, in the antenna 200 shown in FIG25 , the electrical length of the second radiator 240 is greater than three-eighths of the first wavelength. In the antenna 200 shown in FIG25 , the parasitic resonance of the second radiator 240 may correspond to a quarter-wavelength mode. The first resonant circuit 261 and the fourth slot can increase the electrical length of the second radiator 240 to greater than three-eighths of the first wavelength, and the current in the second radiator 240 flows in the same direction (e.g., not in opposite directions), and the electric field between the second radiator 240 and the ground does not flow in opposite directions. The electrical length of the second radiator 240 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 second radiator 240 is dispersed, and the electric field density between second radiator 240 and floor 300 is weakened. This reduces the conductor loss and dielectric loss caused by second radiator 240 and the conductor and dielectric disposed around second radiator 240, thereby improving the radiation characteristics of antenna 200. Second radiator 240 increases the radiation aperture, effectively improving the system efficiency and radiation efficiency of antenna 200.

[0280] The first wavelength can be understood as the vacuum wavelength corresponding to the resonance point of the parasitic resonance, or the vacuum wavelength corresponding to the center frequency of the resonant frequency band formed by the parasitic resonance. 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.

[0281] In one embodiment, antenna 200 further includes a second tuning circuit 262. Second radiator 240 includes a second connection point 222 and a third connection point 223. Second tuning circuit 262 is coupled between second connection point 222 and third connection point 223. A fourth slot is located between second connection point 222 and third connection point 223.

[0282] It should be understood that by coupling the second tuning circuit 262 connected between the second connection point 222 and the third connection point 223, the equivalent capacitance value of the fourth slot can be adjusted, thereby adjusting the radiation characteristics of the antenna 200 (for example, the resonance point frequency of the parasitic resonance generated by the second radiator 240).

[0283] For the sake of simplicity, in the antenna 200 shown in Figure 25, only the second tuning circuit 262 coupled on both sides of the fourth slot is used as an example for explanation. In actual production or design, the antenna 200 may also not include the second tuning circuit 262, and the equivalent capacitance value of the fourth slot may be adjusted by other means.

[0284] In one embodiment, the equivalent capacitance value of the fourth slot 234 is adjusted by adjusting the parameters of the radiators on both sides of the fourth slot 234, as shown in (a) of FIG. 26 .

[0285] The capacitance value is calculated as follows:

[0286] Among them, ε is the dielectric constant of the medium between the two plates of the capacitor (radiators on both sides of the gap); δ is the absolute dielectric constant in a vacuum; k is the electrostatic force constant; S is the facing area of ​​the two plates, which is the facing area of ​​the edge radiators on both sides of the gap in the embodiment of the present application; d is the vertical distance between the two plates, which is the width of the fourth gap 234 in the embodiment of the present application.

[0287] For the sake of simplicity of discussion, in the electronic device shown in (a) of Figure 26, only the method of adjusting the equivalent capacitance value of the fourth gap 234 by changing the facing area of ​​the radiators on both sides of the fourth gap 234 and the medium filled in the fourth gap 234 is shown. In actual production or design, the equivalent capacitance value of the fourth gap 234 can also be adjusted by other methods, and the embodiments of the present application do not limit this.

[0288] The equivalent capacitance values ​​of the gaps described in the embodiments of the present application can all be adjusted by the above methods, and for the sake of brevity, they will not be described one by one.

[0289] In one embodiment, the antenna 200 further includes a second tuning circuit 262 and a third tuning circuit 263 , as shown in FIG26( b ).

[0290] In one embodiment, the first tuning circuit 261 may include a capacitor or an electronic component equivalent to a capacitor.

[0291] In one embodiment, the equivalent capacitance of the first tuning circuit 261 may be less than or equal to a first threshold. The first threshold may be designed based on the resonant frequency of the parasitic resonance generated by the second radiator 240. When the resonant frequency of the parasitic resonance is less than or equal to 1 GHz, the first threshold is 10 pF. When the resonant frequency of the parasitic resonance is greater than 1 GHz, the first threshold is 2 pF.

[0292] In one embodiment, the second tuning circuit 262 may include an inductor or an electronic component equivalent to a capacitor.

[0293] In one embodiment, the equivalent inductance of the second tuning circuit 262 may be less than or equal to 10 nH.

[0294] It should be understood that by designing the equivalent capacitance value of the first tuning circuit 261 and the equivalent inductance value of the second tuning circuit 262 according to the frequencies of the resonance points of different parasitic resonances, the current distribution on the second radiator 240 can be made more dispersed, the conductor loss can be reduced, and the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna (for example, radiation efficiency and system efficiency).

[0295] In one embodiment, the distance between the second connection point 222 and / or the third connection point 223 and the fourth gap is less than or equal to 5 mm.

[0296] The distance between the second connection point 222 and / or the third connection point 223 and the fourth gap can be understood as the minimum distance between the second connection point 222 and / or the third connection point 223 and the conductors on both sides of the fourth gap (the length of the second radiator 240 between the second connection point 222 and / or the third connection point 223 and the fourth gap). When the second tuning circuit 262 is electrically connected to the second connection point 222 and the third connection point 223 via a connector (e.g., a metal spring), the distance between the second tuning circuit 262 and the fourth gap 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 fourth gap.

[0297] In one embodiment, the second connection point 222 may be located between the fourth location 214 and the third connection point 223 .

[0298] In one embodiment, the first connection point 221 is located between the fourth position 214 and the second connection point 222. In one embodiment, the distance between the first connection point 221 and the second connection point 222 (e.g., the length of the second radiator between the first connection point 221 and the second connection point 222) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0299] It should be understood that when the distance between the first connection point 221 and the second connection point 222 is equal to 0 mm, the first connection point 221 coincides with the second connection point 222. In one embodiment, one end of the first tuning circuit 261 and one end of the second tuning circuit 262 can be coupled to the second connection point 222 (first connection point 221) via the same connector.

[0300] In one embodiment, the first connection point 221 may be located between the third position 213 and the third connection point 223. In one embodiment, the distance between the first connection point 221 and the third connection point 223 (e.g., the length of the second radiator between the first connection point 221 and the third connection point 223) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0301] It should be understood that when the distance between the first connection point 221 and the third connection point 223 is equal to 0 mm, the first connection point 221 coincides with the third connection point 223. In one embodiment, one end of the first tuning circuit 261 and one end of the second tuning circuit 262 can be coupled to the third connection point 223 (the first connection point 221) via the same connector.

[0302] The radiation aperture of the second radiator 240 is adjusted simultaneously by the first tuning circuit 261 and the second tuning circuit 262 to achieve parasitic resonance in a desired frequency band.

[0303] It should be understood that the first connection point 221 can be located anywhere on the second radiator 240, and this is not a limitation in the present embodiment. When the length of the second radiator between the first connection point 221 and the second connection point 222 / third connection point 223 is less than or equal to 5 mm, the radiation aperture of the second radiator 240 can be better adjusted, thereby improving the radiation characteristics of the antenna 200.

[0304] In one embodiment, the length of the second radiator 240 between the first end (the ground end, at the fourth position 214) of the second radiator 240 and the fourth slot is smaller than the length of the second radiator 240 between the second end (the open end, at the third position 213) of the second radiator 240 and the fourth slot.

[0305] It should be understood that the length of the radiator between one end of the radiator and the first gap can be understood as the length of the conductor part between the end of the end and the fourth gap. For the sake of simplicity of discussion, it can be understood accordingly in the embodiments of the present application.

[0306] In one embodiment, the length of the second radiator 240 between the first end (the ground end, at the fourth position 214) of the second radiator 240 and the fourth gap is less than three-fifths of the length of the second radiator 240 between the second end (the open end, at the third position 213) of the second radiator 240 and the fourth gap.

[0307] In one embodiment, the length of the second radiator 240 between the first end (the ground end, at the fourth position 214) of the second radiator 240 and the fourth gap is less than one-third of the length of the second radiator 240 between the second end (the open end, at the third position 213) of the second radiator 240 and the fourth gap.

[0308] In one embodiment, the length of the second radiator 240 between the first end (the ground end, at the fourth position 214) of the second radiator 240 and the fourth slot is less than one seventh of the length of the second radiator 240 between the second end (the open end, at the third position 213) of the second radiator 240 and the fourth slot.

[0309] It should be understood that the fourth slot can be located in a region of the second radiator 240 where current is relatively high. The region of relatively high current should be understood as referring to an unslotted second radiator 240 (e.g., operating in quarter-wavelength mode). When the fourth slot is opened, the electric field strength of the second radiator 240 is weakened, thereby achieving a dispersed electric field effect, thereby improving the system efficiency and radiation efficiency of the antenna 200.

[0310] For the sake of simplicity, parts of the antenna 200 shown in FIG25 that are similar to those of the antenna 200 shown in FIG9 will not be described in detail, for example, the position of the first radiator 230; the frequency band of satellite communication; the frequency difference between the first resonance generated by the first radiator 230 and the parasitic resonance generated by the second radiator 240; the relative positions of the first radiator 230 and the second radiator 240, etc.

[0311] Figures 27 to 30 are directional diagrams of the foldable electronic device 100 shown in Figure 25 in the unfolded state at 2.2 GHz. Figure 27 is a directional diagram of the foldable electronic device 100 in the unfolded state when no second radiator is provided. Figure 28 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is lower than the resonant point frequency of the first resonance. Figure 29 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is close to the resonant point frequency of the first resonance. Figure 30 is a directional diagram of the foldable electronic device 100 in the unfolded state when the resonant point frequency of the parasitic resonance is higher than the resonant point frequency of the first resonance.

[0312] As shown in Figure 27, when the second radiator is not installed and the foldable electronic device is unfolded, the current on the floor will affect the maximum radiation direction of the antenna's pattern, causing it to deviate from the top direction (for example, the y direction). Without the second radiator, the antenna's directivity coefficient is 3.53dBi.

[0313] After setting the second radiator, when the foldable electronic device is in the unfolded state, the influence of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna is reduced, so that the maximum radiation direction does not deviate from the top direction (for example, the y direction), and the radiated energy is more concentrated, as shown in Figures 28 to 30.

[0314] When the resonant frequency of the parasitic resonance is lower than the resonant frequency of the first resonance, the antenna's directivity is 5 dBi. When the resonant frequency of the parasitic resonance is close to the resonant frequency of the first resonance, the antenna's directivity is 5.02 dBi. When the resonant frequency of the parasitic resonance is higher than the resonant frequency of the first resonance, the antenna's directivity is 5.01 dBi.

[0315] Figure 31 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0316] As shown in FIG. 31 , the first frame 210 is coupled to the floor 300 at a first position 211 .

[0317] It should be understood that the antenna 200 shown in FIG31 differs from the antenna 200 shown in FIG25 only in the boundary conditions of the first radiator 230. In the above embodiment, only the first radiator 230 is described as having both ends open, forming a dipole-like structure. In actual production or design, the first end of the first radiator 230 is grounded, and the second end is open, forming an IFA-like structure. This application does not impose any restrictions on this.

[0318] In one embodiment, the antenna 200 may further include a third tuning circuit 263 and / or a fourth tuning circuit 264 , as shown in FIG. 32 .

[0319] The first radiator 230 includes a fourth connection point 224 , and the third tuning circuit 263 is coupled between the fourth connection point 224 and the floor 300 .

[0320] The first radiator 230 includes a fifth connection point 225 and a sixth connection point 226. The fourth tuning circuit 264 is coupled between the fifth connection point 225 and the sixth connection point 226. A fifth gap is defined between the fifth connection point 225 and the sixth connection point 226 in the first radiator 230.

[0321] It should be understood that the electrical connection of the first radiator 230 to the floor 300 at the fourth connection point 224 via the third tuning circuit 263 allows the current on the first radiator 230 to be shunted in the area near the fourth connection point 224 when the first radiator 230 generates parasitic resonance. This shunting in the area near the fourth connection point 224 disperses the current density on the first radiator 230. In one embodiment, the current distribution on the first radiator 230 is relatively more dispersed, thereby reducing the conductor loss of the first radiator 230. In one embodiment, the relatively more dispersed current distribution on the first radiator 230 can increase the radiation aperture of the first radiator 230. The reduced conductor loss of the first radiator 230 and the increased radiation aperture of the antenna 200 can improve the system efficiency and radiation efficiency of the antenna.

[0322] At the same time, a fifth slot is provided on the first radiator 230. The fifth slot can be regarded as an equivalent capacitor (e.g., a distributed capacitor) provided on the first radiator 230. The equivalent capacitor can form a metamaterial structure on the first radiator 230. The first radiator 230 having the metamaterial structure can increase the radiation aperture. After the fifth slot is provided, the electric field is more dispersed, and the dielectric loss near the conductor is reduced, thereby effectively improving the system efficiency and radiation efficiency of the antenna 200. By coupling the fourth tuning circuit 264 connected between the fifth connection point 225 and the sixth connection point 226, the equivalent capacitance value of the fifth slot can be adjusted, thereby adjusting the radiation characteristics (e.g., the resonant point frequency) of the antenna 200.

[0323] In one embodiment, the relative positional relationship between the fourth connection point 224, the fifth connection point 225, the sixth connection point 226, and the fifth gap can be understood by referring to the relative positional relationship between the first connection point 221, the second connection point 222, the third connection point 223 and the fourth gap in the above embodiment. For the sake of simplicity, they will not be repeated one by one.

[0324] For the sake of simplicity, parts of the antenna 200 shown in Figures 32 and 31 that are similar to the antenna 200 shown in Figure 25 will not be repeated one by one, for example, the position of the first radiator 230; the frequency band of satellite communication; the frequency difference between the first resonance generated by the first radiator 230 and the parasitic resonance generated by the second radiator 240; the relative positions of the first radiator 230 and the second radiator 240, etc.

[0325] Figure 33 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0326] 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 for illustration. 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 33, only the foldable electronic device 100 including three housings is used for illustration.

[0327] As shown in Figure 33, the foldable electronic device 100 may further include a third housing 204 and a hinge 205. The hinge 205 is located between the second housing 202 and the third housing 204, and the hinge 205 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.

[0328] It should be understood that the antenna 200 shown in FIG33 differs from the foldable electronic device 100 shown in FIG25 only in the third housing 204 and the hinge 205. Similar portions of the antenna 200 shown in FIG33 to those shown in FIG25 are not described in detail here, including, for example, the position of the first radiator 230; the frequency band of satellite communications; the frequency difference between the first resonance generated by the first radiator 230 and the parasitic resonance generated by the second radiator 240; and the relative positions of the first radiator 230 and the second radiator 240.

[0329] Figures 34 and 35 show the directional patterns of the foldable electronic device 100 shown in Figure 33 in the unfolded state at 2.2 GHz. Figure 34 shows the directional pattern of the foldable electronic device 100 in the unfolded state without the second radiator. Figure 35 shows the directional pattern of the foldable electronic device 100 in the unfolded state with the second radiator.

[0330] As shown in Figure 34, without the second radiator, the floor surface of the unfolded foldable electronic device shown in Figure 33 is larger than that of the aforementioned embodiment. Therefore, the current in the floor surface has a greater impact on the maximum radiation direction of the antenna's pattern, causing the maximum radiation direction of the antenna's pattern to deviate further from the top direction (e.g., the y-direction). Without the second radiator, the antenna's directivity coefficient is 3.77 dBi.

[0331] As shown in Figure 35, after the second radiator is set, when the foldable electronic device is in the unfolded state, the influence of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna is reduced, so that the maximum radiation direction will not deviate from the top direction (for example, the y direction), the radiated energy is more concentrated, and the directivity coefficient of the antenna is 5.56dBi.

[0332] Figure 36 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0333] As shown in FIG. 36 , 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 .

[0334] The third frame 310 includes a seventh position 217 and an eighth position 218. The seventh position 217 may be located on a third side of the third frame 310. In one embodiment, the eighth position 218 may be located on a third side of the third frame 310. When the foldable electronic device 100 is in the unfolded state, the first side, the second side, and the third side may be the same side of the foldable electronic device 100, for example, the top side or the bottom side.

[0335] The antenna 200 further includes a third radiator 320 and a fifth tuning circuit 265 . The third radiator 320 is a conductive portion of the third frame 310 between the seventh position 217 and the eighth position 218 .

[0336] It should be understood that the antenna 200 shown in FIG. 36 differs from the foldable electronic device 100 shown in FIG. 33 only in the third radiator 320 .

[0337] In the foldable electronic device 100 shown in FIG33 , the third radiator 320 is not provided (the third frame 310 does not include the seventh position 217 and the eighth position 218). At the resonance point of the first resonance generated by the first radiator 230, the current generated by the first radiator 230 and the current generated by the second radiator 240 are in the same direction. When the foldable electronic device 100 is in the unfolded state, the current generated by the first radiator 230 and the current generated by the second radiator 240 can form an effect similar to a current array, giving the antenna 200 a strong linear polarization characteristic and a higher directivity coefficient.

[0338] In the foldable electronic device 100 shown in FIG36 , a third radiator 320 is provided. At the resonance point where the first resonance is generated on the first radiator 230, the current generated on the first radiator 230 and the current generated on the second radiator 240 are in the same direction, and the current generated on the first radiator 230 and the current generated on the third radiator 320 are in opposite directions (the fifth tuning circuit 265 can be used to generate current in this direction). When the foldable electronic device 100 is in the unfolded state, the reverse current generated on the third radiator 320 can weaken the current generated on the first radiator 230, and the current generated on the second radiator 240 can form an effect similar to a current array, thereby reducing the directivity coefficient of the antenna 200 and making the antenna 200 have a wider radiation beam (for example, a beam with a gain within 3dB of the maximum radiation direction).

[0339] In one embodiment, the structure formed by the third radiator 320 can be similar to the structure formed by the second radiator 240 in any of the above-described embodiments. In one embodiment, the third radiator 320 can have one open end and one grounded end. The third frame 310 defines a sixth slot at the seventh position 217 and couples to the floor 300 at the eighth position 218. Alternatively, the third frame 310 couples to the floor 300 at the seventh position 217 and defines a sixth slot at the eighth position 218. In one embodiment, the third radiator 320 can be a metamaterial structure. The antenna 200 includes a sixth tuning circuit 266. The sixth tuning circuit 266 is coupled between the eighth and ninth connection points of the third radiator 320. The third radiator 320 defines a slot between the eighth and ninth connection points. In one embodiment, the third radiator 320 can have both open ends. The third frame 310 defines a sixth slot at the seventh and eighth positions 217 and 218, respectively.

[0340] It should be understood that the third radiator 320 and the second radiator 240 can have the same structure, for example, a structure with both ends open, or a structure with one end open and the other end grounded. Alternatively, the third radiator 320 and the second radiator 240 can have different structures, which is not limited in the present embodiment and can be selected based on actual production or design.

[0341] FIG37 is a directional diagram of the foldable electronic device 100 shown in FIG36 in the unfolded state at 2.2 GHz.

[0342] As shown in Figure 37, after the second radiator is set, the foldable electronic device reduces the influence of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna in the unfolded state, so that the maximum radiation direction will not deviate from the top direction (for example, the y direction).

[0343] At the same time, after setting the third radiator, the reverse current generated on the third radiator can weaken the current generated on the first radiator and the current generated on the second radiator can form an effect similar to a current array, and the directivity coefficient of the antenna is reduced to 2.1dBi.

[0344] Figure 38 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0345] 38 , the second frame 220 defines a third slit 233 at the third position 213. The second frame 220 is coupled to the floor 300 at the fourth position 214. The second frame 220 defines a fourth slit 234 between the third position 213 and the fourth position 214.

[0346] When the foldable electronic device 100 is in the unfolded state, the third position 213 is located between the second position 212 and the fourth position 214 .

[0347] It should be understood that the antenna 200 in the foldable electronic device 100 shown in Figure 38 differs from the antenna 200 in the foldable electronic device 100 shown in Figures 25, 31 to 33, and 36 only in the relative position relationship between the third position 213 and the fourth position 214 with respect to the rotating shaft 203.

[0348] In the foldable electronic device 100 shown in Figures 25, 26, 31 to 33, and 36, when the foldable electronic device 100 is in the unfolded state, the fourth position 214 is located between the second position 212 and the third position 213. The fourth position 214 is closer to the hinge 203 than the third position 213 (the distance between the fourth position 214 and the hinge 203 along the second frame 220 is less than the distance between the third position 213 and the hinge 203 along the second frame 220). The second radiator 240 has an open first end and a grounded second end. The grounded end of the second radiator 240 is close to the hinge 203.

[0349] In the foldable electronic device 100 shown in FIG38 , when the foldable electronic device 100 is in the unfolded state, the third position 213 is located between the second position 212 and the fourth position 214. The fourth position 214 is further away from the rotation axis 203 than the third position 213 (the distance between the fourth position 214 and the rotation axis 203 along the second frame 220 is greater than the distance between the third position 213 and the rotation axis 203 along the second frame 220). The second radiator 240 has an open first end and a grounded second end, and the open end of the second radiator 240 is close to the rotation axis 203.

[0350] The antenna 200 in the foldable electronic device 100 shown in FIG38 may also have the radiation characteristics of the antenna 200 in the above-described embodiment. For example, the first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the radiation characteristics of the antenna 200. In one embodiment, the first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200. The first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200, thereby adjusting the maximum radiation direction of the directional pattern generated by the antenna 200. When the foldable electronic device 100 is in the unfolded state, the first tuning circuit 261 may be used to adjust the maximum radiation direction of the directional pattern generated by the antenna 200, so that the maximum radiation direction of the directional pattern generated by the antenna 200 is oriented toward a target direction (e.g., toward a communication satellite).

[0351] In one embodiment, when the foldable electronic device 100 is in a folded state, the first slit 231 opened in the first frame 210 is aligned with the fourth slit 234 opened in the second frame 220, and / or the second slit 232 opened in the first frame 210 is aligned with the third slit 233 opened in the second frame 220, so as to enhance the aesthetics of the foldable electronic device 100.

[0352] In one embodiment, antenna 200 further includes a second tuning circuit 262, as shown in FIG39 . Second radiator 240 includes a second connection point 222 and a third connection point 223, and second tuning circuit 262 is coupled between second connection point 222 and third connection point 223. A fourth slot is located between second connection point 222 and third connection point 223.

[0353] It should be understood that the first radiator 230, the second radiator 240, the first tuning circuit 261, and the second tuning circuit 262 are used to generate the antenna's directional pattern. In one embodiment, by coupling the second tuning circuit 262 connected between the second connection point 222 and the third connection point 223, the equivalent capacitance of the fourth slot can be adjusted, thereby adjusting the radiation characteristics of the antenna 200 (e.g., the resonant frequency).

[0354] For the sake of simplicity, parts of the antenna 200 shown in Figures 38 and 39 that are similar to the antenna 200 shown in the above embodiments will not be repeated one by one, for example, the position of the first radiator 230; the frequency band of satellite communication; the frequency difference between the first resonance generated by the first radiator 230 and the parasitic resonance generated by the second radiator 240; the relative positions of the first radiator 230 and the second radiator 240, etc.

[0355] Figure 40 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0356] 40 , the second frame 220 is coupled to the floor 300 at the third position 213 and the fourth position 214. The second frame 220 defines a third gap 233 between the third position 213 and the fourth position 214.

[0357] It should be understood that the antenna 200 in the foldable electronic device 100 shown in Figure 38 differs from the antenna 200 in the foldable electronic device 100 shown in the above embodiment only in the boundary conditions of the second radiator 240 (both ends of the second radiator 240 are open ends or grounded ends).

[0358] In some of the above embodiments, the first end of the second radiator 240 is an open end and the second end is a ground end (for example, in the foldable electronic device 100 shown in Figures 9 and 25), forming a structure similar to an IFA. In some of the above embodiments, the first end and the second end of the second radiator 240 are open ends (for example, in the foldable electronic device 100 shown in Figure 20), forming a structure similar to a dipole.

[0359] In the foldable electronic device 100 shown in FIG40 , the first and second ends of the second radiator 240 are grounded, forming a structure similar to a slot antenna. The second radiator 240 can operate in a half-wavelength mode.

[0360] The antenna 200 in the foldable electronic device 100 shown in FIG40 may also have the radiation characteristics of the antenna 200 in the above-described embodiment. For example, the first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the radiation characteristics of the antenna 200. In one embodiment, the first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200. The first tuning circuit 261 may be used to reduce the effect of the current on the floor 300 on the maximum radiation direction of the directional pattern generated by the antenna 200, thereby adjusting the maximum radiation direction of the directional pattern generated by the antenna 200. When the foldable electronic device 100 is in the unfolded state, the first tuning circuit 261 may be used to adjust the maximum radiation direction of the directional pattern generated by the antenna 200, so that the maximum radiation direction of the directional pattern generated by the antenna 200 is oriented toward a target direction (e.g., toward a communication satellite).

[0361] In one embodiment, antenna 200 further includes a second tuning circuit 262, as shown in FIG40 . Second radiator 240 includes a second connection point 222, and second tuning circuit 262 is coupled to second connection point 222. In one embodiment, third slot 233 is located between second connection point 222 and first connection point 221.

[0362] It should be understood that first radiator 230, second radiator 240, first tuning circuit 261, and second tuning circuit 262 are used to generate the antenna's directional pattern. In one embodiment, first tuning circuit 261 and second tuning circuit 262 can be used to jointly adjust the radiation characteristics of antenna 200 (e.g., the resonant frequency of the parasitic resonance generated by second radiator 240).

[0363] In one embodiment, when the foldable electronic device 100 is in a folded state, the second slit 232 formed in the first frame 210 is aligned with the third slit 233 formed in the second frame 220 to enhance the aesthetics of the foldable electronic device 100 .

[0364] In one embodiment, the third position 213 and the fourth position 214 are located on the second side of the second frame 220 .

[0365] In one embodiment, when the foldable electronic device 100 is in a folded state, the first slit 231 formed in the first frame 210 is aligned with the third slit 233 formed in the second frame 220 to enhance the aesthetics of the foldable electronic device 100 .

[0366] In one embodiment, the third position 213 is located at the second side of the second frame 220 , and the fourth position 214 is located at the other side of the second frame 220 .

[0367] In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is less than or equal to one-quarter of the length of the second radiator 240. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is less than or equal to one-eighth of the length of the second radiator 240. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is less than or equal to 10 mm. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is less than or equal to 5 mm.

[0368] In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is greater than or equal to one-quarter of the length of the second radiator 240. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is greater than or equal to one-half of the length of the second radiator 240. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is greater than or equal to 20 mm. In one embodiment, the minimum distance between the second radiator 240 and the first rotation axis 203 is greater than or equal to 40 mm.

[0369] It should be understood that the embodiment of the present application does not limit the specific position of the second radiator 240, which can be adjusted according to actual production or design. For the sake of brevity, it will not be described in detail.

[0370] In one embodiment, the second frame 220 defines a third slit 233 and a fourth slit 234 between the third position 213 and the fourth position 214 , as shown in FIG. 42 .

[0371] In one embodiment, the third position 213, the third slit 233, the fourth slit 234, and the fourth position 214 are arranged in sequence. In one embodiment, the third position 213 is located on the second side of the second frame 220. The fourth position 214 is located on the other side of the second frame 220.

[0372] In one embodiment, when the foldable electronic device 100 is in a folded state, the first slit 231 opened in the first frame 210 is aligned with the fourth slit 234 opened in the second frame 220, and / or the second slit 232 opened in the first frame 210 is aligned with the third slit 233 opened in the second frame 220, so as to enhance the aesthetics of the foldable electronic device 100.

[0373] In one embodiment, when the third slot 233 and the fourth slot 234 are defined in the second frame 220 , the antenna 200 may include a plurality of tuning circuits.

[0374] It should be understood that the first radiator 230, the second radiator 240, and the multiple tuning circuits are used to generate the antenna's directional pattern. In one embodiment, the multiple tuning circuits are used to collectively adjust the radiation characteristics of the antenna 200 (e.g., the resonant point frequency of the parasitic resonance generated by the second radiator 240).

[0375] It should be understood that in the embodiment of the present application, FIG. 42 illustrates only an example in which the antenna 200 includes a first tuning circuit 261 and a second tuning circuit 262 (the third slot 233 and the fourth slot 234 are located between the first connection point 221 and the second connection point 222). In actual production or design, the locations where the tuning circuits are coupled to the second radiator 240, as well as the number of tuning circuits, can be adjusted. For example, the radiators on either side of the slots may be coupled with tuning circuits, or the radiator between the third slot and the fourth slot may include a connection point coupled to the tuning circuit, etc. For the sake of brevity, these details will not be detailed here.

[0376] Figure 43 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0377] As shown in Figure 43, the foldable electronic device 100 may further include a third housing 204 and a hinge 205. The hinge 205 is located between the first housing 201 and the third housing 204, and the hinge 205 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.

[0378] It should be understood that the antenna 200 shown in FIG43 differs from the foldable electronic device 100 shown in FIG33 only in the locations of the third housing 204 and the hinge 205. In the foldable electronic device 100 shown in FIG33 , the hinge 205 is located between the second housing 202 and the third housing 204. In the foldable electronic device 100 shown in FIG43 , the hinge 205 is located between the first housing 201 and the third housing 204.

[0379] In one embodiment, the third housing 204 includes a third frame 310, at least a portion of which is spaced apart from the floor 300. The third frame 310 includes a seventh position 217 and an eighth position 218. The seventh position 217 may be located on a third side of the third frame 310. In one embodiment, the eighth position 218 may be located on a third side of the third frame 310. When the foldable electronic device 100 is in the unfolded state, the first side, the second side, and the third side may be the same side of the foldable electronic device 100, for example, the top side or the bottom side.

[0380] In one embodiment, the antenna 200 further includes a third radiator 320 and a fifth tuning circuit 265. The third radiator 320 is a conductive portion of the third frame 310 between the seventh position 217 and the eighth position 218.

[0381] The third radiator 320 includes a seventh connection point 227 , and the fifth tuning circuit 265 is coupled between the seventh connection point 227 and the floor 300 .

[0382] It should be understood that when the foldable electronic device 100 is in the unfolded state, the feed circuit feeds an electrical signal, the first radiator 230 is used to generate a first resonance, the second radiator 240 is used to generate a first parasitic resonance, and the third radiator 320 can be used to generate a second parasitic resonance. The first tuning circuit 261 and the fifth tuning circuit 265 can be used to switch the maximum radiation direction of the directional pattern generated by the antenna 200. The first tuning circuit 261 can make the first parasitic resonance generated by the second radiator 240 close to the first resonance by switching the equivalent electrical parameters (e.g., equivalent capacitance, equivalent inductance, or equivalent resistance) between the first connection point 221 and the floor 300. The fifth tuning circuit 265 can make the second parasitic resonance generated by the third radiator 320 close to the first resonance by switching the equivalent electrical parameters (e.g., equivalent capacitance, equivalent inductance, or equivalent resistance) between the seventh connection point 227 and the floor 300 (the first parasitic resonance and the second parasitic resonance close to the first resonance can be similar to the parasitic resonance generated by the second radiator close to the first resonance in the above embodiment, and will not be repeated here). The first and second parasitic resonances jointly reduce the effect of the current flowing through the floor 300 on the radiation characteristics of the antenna 200. The first and second parasitic resonances jointly reduce the effect of the current flowing through the floor 300 on the maximum radiation direction of the antenna 200's pattern. When the foldable electronic device 100 is in the unfolded state, the first and second parasitic resonances jointly reduce the effect of the current flowing through the floor 300 on the maximum radiation direction of the antenna 200's pattern, thereby adjusting the maximum radiation direction of the antenna 200's pattern. The first and second parasitic resonances jointly adjust the maximum radiation direction of the antenna 200's pattern, thereby aligning the maximum radiation direction of the antenna 200's pattern toward a target (e.g., toward a communications satellite). Because the effect of the current flowing through the floor 300 on the maximum radiation direction of the antenna 200's pattern is reduced, the maximum radiation direction of the antenna 200's pattern is substantially the same when the foldable electronic device 100 is in both the folded and unfolded states. Therefore, when performing satellite communications, the user does not need to change the position of the foldable electronic device 100 when changing its state (folded or unfolded), effectively improving the user experience.

[0383] At the same time, at the resonance point where the first resonance occurs on the first radiator 230, the currents generated on the first radiator 230, the currents generated on the second radiator 240, and the currents generated on the third radiator 320 all have the same direction. The currents generated on the first radiator 230, the second radiator 240, and the third radiator 320 form a current array-like effect, giving the antenna 200 a strong linear polarization characteristic and a higher directivity coefficient. Since gain is related to directivity, the higher directivity coefficient improves the gain of the antenna 200, enabling the foldable electronic device 100 to have better satellite communication performance.

[0384] In one embodiment, the structure formed by the third radiator 320 can be similar to the structure formed by any of the second radiators 240 in the above-described embodiments. For example, the structure formed by the third radiator 320 in FIG. 43 can be replaced with the structure formed by any of the second radiators 240 in the above-described embodiments. In one embodiment, the third radiator 320 can have one open end and one grounded end. The third frame 310 has a sixth slot at the seventh position 217 and is coupled to the floor 300 at the eighth position 218. Alternatively, the third frame 310 is coupled to the floor 300 at the seventh position 217 and has a sixth slot at the eighth position 218. In one embodiment, the third radiator 320 can be a metamaterial structure. The antenna 200 includes a sixth tuning circuit 266. The sixth tuning circuit 266 is coupled between the eighth and ninth connection points of the third radiator 320. The third radiator 320 has a slot between the eighth and ninth connection points. In one embodiment, the third radiator 320 can have two open ends. The third frame 310 defines a sixth slit and a seventh slit at the seventh position 217 and the eighth position 218 .

[0385] It should be understood that the third radiator 320 and the second radiator 240 can have any of the structures described in the above embodiments. For the sake of brevity, these structures will not be described in detail. In one embodiment, the third radiator 320 and the second radiator 240 can have the same structure, for example, with both ends open, or with one end open and the other grounded. Alternatively, the third radiator 320 and the second radiator 240 can have different structures. This is not limited in the present embodiment and can be selected based on actual production or design.

[0386] Figure 44 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0387] It should be understood that the antenna 200 shown in FIG. 44 differs from the foldable electronic device 100 shown in FIG. 43 only in that the third radiator 320 is not included.

[0388] In the foldable electronic device 100 shown in FIG43 , a third radiator 320 is provided. At the resonance point where the first radiator 230 generates the first resonance, the currents generated in the first radiator 230, the second radiator 240, and the third radiator 320 are directed in the same direction. This current, generated by the first radiator 230, the second radiator 240, and the third radiator 320, can form a current array-like effect, giving the antenna 200 a strong linear polarization characteristic and a higher directivity coefficient.

[0389] In the foldable electronic device 100 shown in FIG44 , the third radiator 320 is not provided. For example, compared to the antenna 200 shown in FIG43 , the current-like array effect formed by the current is weakened, thereby reducing the directivity coefficient of the antenna 200, so that the antenna 200 has a wider radiation beam (for example, a beam width within 3dB of the gain in the maximum radiation direction).

[0390] Among them, not setting the third radiator 320 can be understood as that all radiators (parasitic branches) on the third frame 310 will not have a significant impact on the directional pattern of the antenna 200 (for example, the maximum radiation direction of the directional pattern generated by the antenna 200 is offset by more than 10°).

[0391] FIG45 is a schematic diagram of an electronic device 100 provided in an embodiment of the present application.

[0392] It should be understood that in the above embodiments, the electronic device 100 is a foldable electronic device. In actual production or design, the technical solutions described in the embodiments of the present application can also be used for other types of electronic devices 100 including larger-sized floors.

[0393] 45 , the electronic device 100 and the sub-device 100 may include a first frame 210 and a floor 300. At least a portion of the first frame 210 is spaced apart from the floor 300.

[0394] The first frame 210 includes a first side 301. The first side 301 includes a first position 211, a second position 212, a third position 213, and a fourth position 214, which are arranged in sequence. The first frame 301 has an insulating gap at the first position 211 or is coupled to the floor 300. The first frame 301 has an insulating gap at the second position 212 or is coupled to the floor 300. The first frame 301 has an insulating gap at the third position 213 or is coupled to the floor 300. The first frame 301 has an insulating gap at the fourth position 214 or is coupled to the floor 300.

[0395] The electronic device 100 may further include an antenna 200. The operating frequency band of the antenna 200 may include a satellite communication frequency band.

[0396] The antenna 200 includes a first radiator 230 , a second radiator 240 , a feeding circuit 250 and a first tuning circuit 261 .

[0397] The first radiator 230 is a conductive portion of the first frame 210 between the first position 211 and the second position 212 , and the second radiator 240 is a conductive portion of the second frame 220 between the third position 213 and the fourth position 214 .

[0398] The first radiator 230 includes a feeding point 251 , and the feeding circuit 250 is coupled to the feeding point 251 .

[0399] The second radiator 240 includes a first connection point 221 , and the first tuning circuit 261 is coupled between the first connection point 221 and the floor 300 .

[0400] The first frame 210 further includes a second side 302 and a third side 303 that intersect the first side 301 at an angle.

[0401] In one embodiment, the length L0 of the first side 301, the length L1 of the first radiator 230, and the length L2 of the second radiator 240 satisfy the following: 1.2×(L1+L2)≤L0. In one embodiment, the length L0 of the first side 301, the length L1 of the first radiator 230, and the length L2 of the second radiator 240 satisfy the following: 1.5×(L1+L2)≤L0. In one embodiment, the length L0 of the first side 300, the length L1 of the first radiator 231, and the length L2 of the second radiator 240 satisfy the following: 2×(L1+L2)≤L0.

[0402] It should be understood that the length L0 of the first side 301 can be understood as the dimension of the electronic device 100 in the direction (e.g., the x-direction) along which the first side 301 extends. The proportional relationship between the length L0 of the first side 301 and the length L1 of the first radiator 230 and the length L2 of the second radiator 240 can also be understood as the proportional relationship between the dimension L0' of the floor 300 in the direction (e.g., the x-direction) along which the first side 301 extends and the length L1 of the length L2 of the first radiator 230 and the second radiator 240. For example, 1.2×(L1+L2)≤L0', 1.5×(L1+L2)≤L0', and 2×(L1+L2)≤L0'.

[0403] In one embodiment, the distance between the first position 211 and the second side 302 is less than or equal to the distance between the second position 212 and the third side 303. The first radiator 230 is disposed close to the second side 302.

[0404] It should be understood that the distance between the first position 211 and the second side 302 can be understood as the distance between the first position 211 and the second side 302 along the extension direction (e.g., the x-direction) of the first side 301. For the sake of simplicity, the distances between the sides described in the embodiments of the present application can be understood accordingly.

[0405] It should be understood that in the above embodiments (e.g., the electronic device 100 shown in Figures 9 to 43), the electronic device 100 is a foldable electronic device, and the first radiator 230 and the second radiator 240 are respectively located on the first housing 201 and the second housing 202 of the electronic device 100, which can be folded together. When the electronic device 100 is in the unfolded state, the first radiator 230 and the second radiator 240 are both located on the same side of the electronic device 100. The feeding circuit 250 feeds an electrical signal, causing the first radiator 230 to generate a first resonance. The second radiator 240 and the first tuning circuit 261 can be used to reduce the impact of current on the floor 300 on the antenna's directional pattern.

[0406] In the electronic device 100 shown in FIG. 45 , the only difference from the electronic device 100 shown in the above embodiment (the electronic device 100 shown in FIG. 9 to FIG. 44 ) is that the electronic device 100 is not foldable.

[0407] In the electronic device 100 shown in FIG. 45 , the first radiator 230 and the second radiator 240 may have any one of the structures of the first radiator 230 and the structure of the second radiator 240 shown in the above embodiments.

[0408] When first radiator 230 is positioned near second edge 302 and an electrical signal is fed into feed circuit 250, first radiator 230 generates a first resonance. Second radiator 240 and first tuning circuit 261 can be used to reduce the impact of current on floor 300 on the antenna's directional pattern. Because the impact of current on floor 300 on the antenna's directional pattern's maximum radiation direction is reduced, the angle between the maximum radiation direction of the antenna's directional pattern and a direction perpendicular to the extension direction of first edge 301 (e.g., the y-direction) is smaller. The maximum radiation direction of the antenna's directional pattern can be oriented toward a target (e.g., toward a communications satellite), facilitating communication with the satellite.

[0409] In one embodiment, the first radiator 230 and the second radiator 240 are respectively located on two sides of a midpoint of the first side 301. The lengths of the first side 301 on both sides of the midpoint are the same.

[0410] It should be understood that the first radiator 230 and the second radiator 240 are respectively located on both sides of the midpoint of the first side 301, which can further reduce the influence of the current on the floor 300 on the side of the second radiator 240 on the maximum radiation direction of the directional pattern generated by the antenna, so that the maximum radiation direction of the directional pattern generated by the antenna 200 is not deflected toward the side of the second radiator 240.

[0411] In one embodiment, the distance L1′ between the first position 211 and the second side 302 and the length L1 of the first radiator 230 satisfy: L1′≤L1. In one embodiment, the distance L1′ between the first position 211 and the second side 302 and the length L1 of the first radiator 230 satisfy: L1′≤L1×0.5.

[0412] In one embodiment, the distance L2′ between the fourth position 214 and the third side 303 and the length L2 of the second radiator 240 satisfy: L2′≤L2. In one embodiment, the distance L2′ between the fourth position 214 and the third side 303 and the length L2 of the second radiator 240 satisfy: L2′≤L2×0.5.

[0413] It should be understood that similarities between the electronic device 100 shown in FIG45 and the electronic device 100 shown in FIG9 through FIG44 are not described in detail. For example, similarities include parameters related to the insulation gaps provided in the frame; the satellite communication frequency band; and the efficiency pits caused by parasitic resonances generated by parasitic stubs within the operating frequency band.

[0414] 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 the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A foldable electronic device, characterized in that, Comprising: A first housing, a second housing, and a floor, wherein The first housing includes a first frame, the second housing includes a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; The first frame includes a first position and a second position, and the first position and the second position are located on a first side of the first frame; The second frame includes a third position and a fourth position, the third position is located on a second side of the second frame, and based on the foldable electronic device being in an unfolded state, the first side and the second side are the top side or the bottom side of the foldable electronic device; A first rotating shaft, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is respectively rotatably connected to the first housing and the second housing; and An antenna, the antenna comprising: A first radiator and a second radiator, the first radiator is a conductive part of the first frame between the first position and the second position, and the second radiator is a conductive part of the second frame between the third position and the fourth position; and A feeding circuit, the first radiator includes a feeding point, and the feeding circuit is coupled to the feeding point; A first tuning circuit, the second radiator includes a first connection point, and the first tuning circuit is coupled and connected between the first connection point and the floor; Wherein, based on the foldable electronic device being in an unfolded state, the first radiator is used to generate a first resonance, the resonance frequency band of the first resonance includes a satellite communication frequency band, and wherein, the first radiator, the second radiator and the first tuning circuit are used to generate the radiation pattern of the antenna.

2. The foldable electronic device according to claim 1, wherein The first frame is provided with a first slot and a second slot at the first position and the second position.

3. The foldable electronic device according to claim 1, wherein, The first frame is provided with a first slot at the first position, and the first frame is coupled to the floor at the second position.

4. The foldable electronic device according to claim 1, wherein The first frame is provided with a first slot at the first position, and the first frame is coupled to the floor at the second position; The antenna further includes a second tuning circuit, the first radiator includes a second connection point and a third connection point, the first radiator is provided with a second slot between the second connection point and the third connection point, and the second tuning circuit is coupled and connected between the second connection point and the third connection point.

5. The foldable electronic device according to any one of claims 1 to 4, characterized in that, Based on the foldable electronic device being in an unfolded state, the maximum radiation direction of the radiation pattern of the antenna is related to the second radiator and the first tuning circuit.

6. The foldable electronic device according to any one of claims 1 to 5, wherein Based on the antenna operating in the satellite communication frequency band, When the foldable electronic device is in an unfolded state, the maximum radiation direction of the radiation pattern generated by the antenna is a first direction, When the foldable electronic device is in a folded state, the maximum radiation direction of the radiation pattern generated by the antenna is a second direction, and the angle formed between the first direction and the second direction is less than or equal to 30°.

7. The foldable electronic device according to any one of claims 1 to 6, characterized in that, The first tuning circuit and the second radiator are used to generate parasitic resonance, and the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 200 MHz.

8. The foldable electronic device according to any one of claims 1 to 7, characterized in that The antenna generates an efficiency pit at a first frequency point, and the frequency difference between the resonance point frequency of the first resonance and the first frequency point frequency is less than or equal to 200 MHz.

9. The foldable electronic device according to any one of claims 1 to 8, characterized in that Based on the foldable electronic device being in the unfolded state, the difference between the resonance point frequency of the first resonance and the resonance point frequency of the parasitic resonance is less than or equal to 50 MHz.

10. The foldable electronic device according to any one of claims 1 to 9, characterized in that The antenna generates an efficiency pit at a first frequency point, and the frequency difference between the resonance point frequency of the first resonance and the first frequency point frequency is less than or equal to 50 MHz.

11. The foldable electronic device according to any one of claims 1 to 10, characterized in that The first radiator is used to generate a main resonance, the first tuning circuit and the second radiator are used to generate a parasitic resonance, the resonance point of the parasitic resonance is located within the resonance frequency band of the main resonance, and the main resonance and the parasitic resonance together form the first resonance.

12. The foldable electronic device according to any one of claims 1 to 11, characterized in that, The second frame opens a third slot and a fourth slot at the third position and the fourth position.

13. The foldable electronic device according to claim 12, wherein The antenna further includes a third tuning circuit, the second radiator includes a fourth connection point, the third tuning circuit is coupled between the fourth connection point and the ground plane, and the first radiator, the second radiator, the first tuning circuit and the third tuning circuit are used to generate the radiation pattern of the antenna.

14. The foldable electronic device according to any one of claims 1 to 11, characterized in that Based on the foldable electronic device being in the unfolded state, the fourth position is located between the second position and the third position; The second frame opens a third slot at the third position, and the second frame is coupled to the ground plane at the fourth position.

15. The foldable electronic device according to any one of claims 1 to 11, characterized in that Based on the foldable electronic device being in the unfolded state, the fourth position is located between the second position and the third position; The second frame is coupled to the ground plane at the third position, and the second frame opens a third slot at the fourth position.

16. The foldable electronic device according to claim 14 or 15, characterized in that The antenna further includes a third tuning circuit; The second radiator includes a fourth connection point and a fifth connection point, the second radiator opens a fourth slot between the fourth connection point and the fifth connection point, the third tuning circuit is coupled between the fourth connection point and the fifth connection point, and the first radiator, the second radiator, the first tuning circuit and the third tuning circuit are used to generate the radiation pattern of the antenna.

17. The foldable electronic device according to claim 16, wherein, the distance between the fourth connection point and the fourth slit is less than or equal to 5 mm, and / or, the distance between the fifth connection point and the fourth slit is less than or equal to 5 mm.

18. The foldable electronic device according to claim 16 or 17, wherein, the fourth connection point is located between the third position and the fourth slit, and the fifth connection point is located between the fourth position and the fourth slit; the first connection point is located between the third position and the fourth connection point, and the distance between the fourth connection point and the first connection point is greater than or equal to 0 mm and less than or equal to 5 mm; or, the first connection point is located between the fourth position and the fifth connection point, and the distance between the fifth connection point and the first connection point is greater than or equal to 0 mm and less than or equal to 5 mm.

19. The foldable electronic device according to any one of claims 1 to 11, characterized in that, The second frame is coupled to the floor at the third position and the fourth position.

20. The foldable electronic device according to claim 19, wherein The second radiator has a third slit and / or a fourth slit formed therebetween at the third position and the fourth position.

21. The foldable electronic device according to any one of claims 1 to 20, wherein, the minimum distance between the second radiator and the first rotating shaft is less than or equal to one quarter of the length of the second radiator.

22. The foldable electronic device according to any one of claims 1 to 20, wherein, the minimum distance between the second radiator and the first rotating shaft is greater than or equal to one quarter of the length of the second radiator.

23. The foldable electronic device according to any one of claims 1 to 22, wherein, the foldable electronic device may further include a third housing and a second rotating shaft; wherein, the second rotating shaft is located between the second housing and the third housing, and the second rotating shaft is respectively rotatably connected to the second housing and the third housing; or, the second rotating shaft is located between the first housing and the third housing, and the second rotating shaft is respectively rotatably connected to the first housing and the third housing.

24. The foldable electronic device according to claim 23, wherein, the third housing includes a third frame, at least a part of the third frame is spaced apart from the floor, the third frame has a fifth position and a sixth position, the fifth position is located on the third side of the third frame, and based on the foldable electronic device being in the unfolded state, the first side, the second side and the third side are the same side of the foldable electronic device; the antenna further includes a third radiator and a fourth tuning circuit, the third radiator is a conductive part of the third frame between the fifth position and the sixth position, the third radiator includes a sixth connection point, and the fourth tuning circuit is coupled between the sixth connection point and the floor.

25. The foldable electronic device according to claim 24, wherein, based on the second rotating shaft being located between the second housing and the third housing, the first radiator is configured to generate a first resonance; Based on the foldable electronic device being in the unfolded state, at the resonance point of the first resonance, the currents on the first radiator and the second radiator are in the same direction, and the currents on the first radiator and the third radiator are in opposite directions.

26. The foldable electronic device according to claim 25, wherein Based on the second rotating shaft being located between the first housing and the third housing, the first radiator is configured to generate a first resonance; Based on the foldable electronic device being in the unfolded state, at the resonance point of the first resonance, the currents on the first radiator, the second radiator, and the third radiator are in the same direction.

27. The foldable electronic device according to any one of claims 1 to 26, wherein Based on the foldable electronic device being in the folded state, the first radiator and the second radiator at least partially overlap in a third direction, and the third direction is the thickness direction of the foldable electronic device.

28. The foldable electronic device according to any one of claims 1 to 27, wherein The ratio of the size of the floor along the extension direction of the first side when the foldable electronic device is in the unfolded state to that in the folded state is greater than or equal to 1.8 and less than or equal to 2.

2.

29. The foldable electronic device according to any one of claims 1 to 28, wherein The foldable electronic device performs at least one of the following services in the satellite communication frequency band: satellite sending and / or receiving short messages, satellite calling and / or answering calls, and satellite data.

30. An electronic device, characterized in that, Comprising: A floor; A frame, at least part of the frame is spaced apart from the floor, The frame includes a first side and a second side that intersect at an angle, and the first side includes a first position, a second position, a third position, and a fourth position arranged in sequence; An antenna, the antenna includes: A first radiator and a second radiator, the first radiator is the conductive part of the frame between the first position and the second position, and the second radiator is the conductive part of the frame between the third position and the fourth position; and A feeding circuit, the first radiator includes a feeding point, and the feeding circuit is coupled to the feeding point; A first tuning circuit, the second radiator includes a first connection point, and the first tuning circuit is coupled and connected between the first connection point and the floor; Wherein, the length L0 of the first side, the length L1 of the first radiator, and the length L2 of the second radiator satisfy: 1.2×(L1 + L2) ≤ L0; The distance L1' between the first position and the second side and the length L1 of the first radiator satisfy: L1' ≤ L1; The first radiator is configured to generate a first resonance, the resonance frequency band of the first resonance includes the satellite communication frequency band, and wherein, the first radiator, the second radiator, and the first tuning circuit are configured to generate the radiation pattern of the antenna.

31. The electronic device according to claim 30, wherein The first radiator and the second radiator are respectively located on both sides of the midpoint of the first side, and the lengths of the first side on both sides of the midpoint are the same.

32. The electronic device according to claim 30 or 31, characterized in that, The frame is provided with a first slot and a second slot at the first position and the second position.

33. The electronic device according to claim 30 or 31, wherein the frame is provided with a first slot at the first position, and the frame is coupled to the floor at the second position, or the frame is coupled to the floor at the first position, and the frame is provided with a first slot at the second position.

34. The electronic device according to any one of claims 30 to 33, wherein the frame is provided with a third slot and a fourth slot at the third position and the fourth position.

35. The electronic device according to any one of claims 30 to 33, wherein the frame is coupled to the floor at the third position, and the frame is provided with a third slot at the fourth position, or the frame is provided with a third slot at the third position, and the frame is coupled to the floor at the fourth position.

36. The electronic device according to claim 35, wherein the antenna further includes a second tuning circuit; the second radiator includes a second connection point and a third connection point, the second radiator is provided with a fourth slot between the second connection point and the third connection point, the second tuning circuit is coupled between the second connection point and the third connection point, and the first radiator, the second radiator, the first tuning circuit and the second tuning circuit are used to generate the radiation pattern of the antenna.

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