Electronic equipment

Abstract

The embodiment of the invention provides electronic equipment. The electronic equipment comprises a first antenna and a second antenna. The first antenna takes the conductive part of the frame of the first shell as a first radiator and a parasitic branch knot. And the second antenna takes the conductive part of the frame of the second shell as a second radiator, and the second radiator and the parasitic branch knot are arranged adjacently. The electronic device can be a foldable electronic device, when the electronic device is in a folded state, the first antenna and the second antenna have good isolation, and the first antenna and the second antenna can work at the same time to improve the communication performance of the electronic device.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to an electronic device. Background Art

[0002] With the rapid development of wireless communication technology, in the past, the second generation (2G) mobile communication system mainly supported call functions, and electronic devices were only tools for people to send and receive text messages and communicate by voice. The wireless Internet function was extremely slow because data transmission used the voice channel. Nowadays, in addition to making calls, sending text messages, and taking pictures, electronic devices can also be used for listening to music online, watching online videos, real-time video, etc., covering various applications such as calls, film and television entertainment, and e-commerce in people's lives. This has led to a gradual increase in the number of antennas that need to be set in electronic devices.

[0003] For a foldable electronic device, in the folded state, the radiation environment of the antenna is limited. In order to improve the radiation characteristics of the antenna (such as bandwidth, efficiency, etc.), it is usually necessary to set parasitic branches near the radiator. However, the parasitic branches will deteriorate the isolation between other antennas arranged adjacent to each other, causing inconvenience to users. Summary of the Invention

[0004] This application provides an electronic device, which includes a first antenna and a second antenna. Both the first antenna and the second antenna can improve the antenna radiation characteristics through parasitic branches, and there is good isolation between the first antenna and the second antenna.

[0005] In a first aspect, an electronic device is provided, comprising: a first shell, a second shell and a floor, the first shell comprising a first frame, the second shell comprising a second frame; the first frame comprising a first position, a second position and a third position arranged in sequence, the first frame being coupled to the floor or having an insulating gap at the first position, the first frame having a first insulating gap and a second insulating gap at the second position and the third position respectively; the second frame comprising a fourth position and a fifth position, the second frame having a third insulating gap at the fourth position, the second frame being coupled to the floor or having an insulating gap at the fifth position; a first rotating shaft, the first rotating shaft being located between the first shell and the second shell, and the first rotating shaft being rotatably connected to the first shell and the second shell respectively; and a first antenna, the first antenna comprising: a first radiator, the first radiator comprising a conductive portion of the first frame between the first position and the second position, at least a portion of the first radiator being spaced apart from the floor, and a first feeding circuit, the first radiator comprising a first feeding point, the first feeding circuit being coupled to the first feeding point to feed in a radio frequency signal of a first frequency band; a second antenna, the second antenna comprising: a second radiator, the second radiator comprising The conductive portion of the second frame between the fourth position and the fifth position, at least a portion of the second radiator is spaced apart from the floor, and a second feeding circuit, the second radiator includes a second feeding point, the second feeding circuit is coupled to the second feeding point to feed a radio frequency signal of a second frequency band; the electronic device further includes: a parasitic branch, the parasitic branch includes a conductive portion of the first frame between the second position and the third position, at least a portion of the parasitic branch is spaced apart from the floor, and a first element, the parasitic branch includes a first connection point, the first element is inductive, and the first element is coupled to the first connection point and the floor; wherein, based on the electronic device being in a folded state, the parasitic branch and the second radiator at least partially overlap along a first direction, and the first radiator and the second radiator are staggered along the first direction, and the first direction is a thickness direction of the electronic device; based on the electronic device being in a folded state, the distance between the second position and the fourth position is smaller than the distance between the second position and the fifth position; the center frequency of the first frequency band is smaller than or equal to the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is smaller than or equal to 300 MHz.

[0006] According to an embodiment of the present application, when the electronic device is in a folded state and a radio frequency signal is fed into the first feeding point, the first antenna can couple to generate a first current path on the parasitic stub. In the first current path, the currents on the parasitic stub between the second position and the third position are in the same direction.

[0007] In the first frequency band, since a first element is coupled between the first connection point of the parasitic stub and the ground plane, a second current path can be additionally generated on the parasitic stub. In the second current path, the currents on the parasitic stub on both sides of the first connection point are in opposite directions.

[0008] Therefore, the current on the first current path and the current on the second path are partially in opposite directions, and the current on the second path can cancel out part of the current on the first path, thereby weakening the coupling between the first radiator and the second radiator and improving the isolation between the first antenna and the second antenna.

[0009] Moreover, since the first element is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna. The inductive element has the characteristics of low-pass and high impedance. The additional current path generated by the second antenna (feeding a radio frequency signal into the second feeding point) on the parasitic stub is weak and will not have a great impact on the original current path. The parasitic stub 430 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna.

[0010] In combination with the first aspect, in some implementation manners of the first aspect, the distance between the first connection point and the second position is greater than the distance between the first connection point and the third position.

[0011] According to an embodiment of the present application, when the first connection point is disposed on the side of the parasitic stub away from the first radiator, the current for reverse cancellation between the current on the first current path and the current on the second path can be increased, further reducing the coupling between the first radiator and the second radiator and improving the isolation between the first antenna and the second antenna.

[0012] In combination with the first aspect, in some implementation manners of the first aspect, the first connection point is located in the first current large point region of the parasitic stub, and the first current large point region is generated by the second antenna coupling.

[0013] According to an embodiment of the present application, the fact that the above-mentioned first current large point region is generated by the second antenna can be understood as the region where the current large point is located in the current path coupled by the second antenna on the parasitic stub. Since current corresponds to electric field, the above-mentioned current large point can also be understood as the electric field zero point (the electric fields on both sides of the electric field zero point are in opposite directions). In the embodiment of the present application, the current large point region can be understood as the region within 5 mm from the current maximum point, or the region within 5 mm from the electric field zero point.

[0014] When the first connection point is located in the first large current point area, the influence of the first component on the second antenna is smaller, and the parasitic stub can improve the radiation characteristics of the second antenna to a greater extent.

[0015] Combined with the first aspect, in some implementation manners of the first aspect, the first radiator is configured to generate a first resonance, and the resonance frequency band of the first resonance includes the first frequency band; the second radiator is configured to generate a second resonance, and the resonance frequency band of the second resonance includes the second frequency band, and the resonance point frequency of the second resonance is greater than or equal to the resonance point frequency of the first resonance; the parasitic stub and the first component are configured to generate a first parasitic resonance and a second parasitic resonance, the resonance point frequency of the first parasitic resonance is greater than the resonance point frequency of the second resonance, and the resonance point frequency of the second parasitic resonance is less than the resonance point frequency of the first resonance.

[0016] According to the embodiments of the present application, the first current path coupled by the first antenna on the parasitic stub and the current path coupled by the second antenna on the parasitic stub in the above embodiments may correspond to the first parasitic resonance. The second current path coupled by the first antenna on the parasitic stub in the above embodiments may correspond to the second parasitic resonance.

[0017] Combined with the first aspect, in some implementation manners of the first aspect, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz.

[0018] According to the embodiments of the present application, compared with the resonance point of the first resonance, the resonance point of the second parasitic resonance is closer to the low frequency. When the frequency between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is within a certain range, the cancellation effect of the current on the second current path and the current on the first current path is better, and the isolation between the first antenna and the second antenna is better. Moreover, it will not cause a radiation efficiency pit in the first frequency band of the first antenna due to the second parasitic resonance being close to the first resonance, and the radiation characteristics of the first antenna in the first frequency band will not be reduced.

[0019] Combined with the first aspect, in some implementation manners of the first aspect, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0020] According to the embodiments of the present application, when the frequency between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is within a certain range, it will not cause a radiation efficiency pit in the second frequency band of the second antenna due to the first parasitic resonance being close to the second resonance, and the second antenna can have better radiation characteristics (such as radiation efficiency) in the second frequency band.

[0021] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the first parasitic resonance, the currents on the parasitic stub are in the same direction, and / or, at the resonance point of the second parasitic resonance, the currents on the parasitic stub include partially reverse currents.

[0022] In combination with the first aspect, in some implementations of the first aspect, the first parasitic resonance is used to improve the radiation efficiency of the second antenna in the second frequency band, and / or, the second parasitic resonance is used to improve the isolation between the first antenna and the second antenna in the first frequency band.

[0023] According to the embodiments of the present application, at the resonance point of the first parasitic resonance, in the first current path generated by the first antenna coupling on the parasitic stub and the current path generated by the second antenna coupling on the parasitic stub, the currents on the parasitic stub are in the same direction, and this same-direction current can be used to improve the radiation characteristics (e.g., radiation efficiency) of the antenna.

[0024] At the resonance point of the second parasitic resonance, in the second current path generated by the first antenna coupling on the parasitic stub, the current on the parasitic stub includes partially reverse currents. The current on the second current path can cancel part of the current on the first current path, so that the overall current generated by the first antenna 401 coupling on the parasitic stub 430 is weakened (since the overall current is weakened, the improvement of the radiation characteristics of the first antenna by the first parasitic resonance is small), and further the coupling between the first radiator and the second radiator is weakened, improving the isolation between the first antenna and the second antenna.

[0025] In combination with the first aspect, in some implementations of the first aspect, the electronic device further includes a second element. The parasitic stub includes a second connection point, and the second element is capacitive and is coupled between the second connection point and the ground plane.

[0026] According to the embodiments of the present application, part of the current in the current path generated by the second antenna will flow into the ground plane at the second connection point, further reducing the coupling between the first radiator and the second radiator and improving the isolation between the first antenna and the second antenna.

[0027] At the same time, since the second element is capacitive and the operating frequency band of the first antenna is lower than that of the second antenna, and the capacitive element has the characteristics of high-pass and low-resistance. On the parasitic stub, the current path generated by the first antenna is not affected near the second connection point, and the parasitic stub can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna.

[0028] In combination with the first aspect, in some implementations of the first aspect, the distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

[0029] In combination with the first aspect, in some implementations of the first aspect, the second connection point is located in the third current maximum region of the parasitic stub, and the third current maximum region is generated by the coupling of the first antenna.

[0030] According to the embodiments of the present application, the above-mentioned second current maximum region can be understood as the region where the current maximum is located in the current path coupled by the first antenna on the parasitic stub.

[0031] When the second connection point is located in the second current maximum region, the influence of the second element on the first antenna is smaller, and the improvement of the radiation characteristics of the parasitic stub on the first antenna can be greater.

[0032] In combination with the first aspect, in some implementations of the first aspect, the second element is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

[0033] In combination with the first aspect, in some implementations of the first aspect, the first frame is coupled to the ground at the first position; the second frame respectively has a fourth insulating gap at the fifth position; wherein, the first insulating gap and the third insulating gap are aligned, and / or, the first insulating gap and the fourth insulating gap are aligned.

[0034] In combination with the first aspect, in some implementations of the first aspect, the second frame further includes a sixth position, the fifth position is located between the fourth position and the sixth position, the second frame respectively has a fourth insulating gap at the fifth position, and the second frame is coupled to the ground at the sixth position; the second radiator includes the conductive part of the second frame between the fourth position and the sixth position; the second antenna further includes a third element, the second radiator includes a third connection point and a fourth connection point, the fourth insulating gap is located between the third connection point and the fourth connection point, and the third element is coupled between the third connection point and the fourth connection point.

[0035] In combination with the first aspect, in some implementations of the first aspect, the distance between the fourth insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5 mm.

[0036] In connection with the first aspect, in certain implementations of the first aspect, the first frame further includes a seventh position, the third position is located between the second position and the seventh position, and the first frame is coupled to the floor at the seventh position; the parasitic stub includes the conductive portion of the first frame between the second position and the seventh position, and the first connection point is located on the parasitic stub between the second position and the third position; the first antenna and the second antenna further include a fourth element, the parasitic stub includes a fifth connection point and a sixth connection point, the second insulating gap is located between the fifth connection point and the sixth connection point, and the fourth element is coupled between the fifth connection point and the sixth connection point.

[0037] In connection with the first aspect, in certain implementations of the first aspect, the distance between the second insulating gap and the fifth connection point and the sixth connection point is less than or equal to 5 mm.

[0038] In connection with the first aspect, in certain implementations of the first aspect, the length L1 of the first frame between the first position and the second position and the length L2 of the first frame between the second position and the third position satisfy: L1 × 150% ≤ L2.

[0039] According to the embodiments of the present application, as the length of the parasitic stub increases, it is more beneficial to improve the radiation characteristics of the antenna (the first antenna or the second antenna).

[0040] In connection with the first aspect, in certain implementations of the first aspect, the first frequency band includes 1578.42 ± 1.023 MHz, the second frequency band includes 1.71 GHz - 1.785 GHz, and / or, the first frequency band includes 2.4 GHz - 2.4835 GHz, the second frequency band includes 2.5 GHz - 2.57 GHz or 2.496 GHz - 2.69 GHz.

[0041] In connection with the first aspect, in certain implementations of the first aspect, the first frame between the second position and the third position does not include a ground point.

[0042] In a second aspect, an electronic device is provided, including: a first housing, a second housing, and a floor. The first housing includes a first frame, and the second housing includes a second frame; the first frame includes a first position, a second position, and a third position arranged in sequence. The first frame is coupled to the floor or has an insulating gap at the first position, and the first frame has a first insulating gap and a second insulating gap at the second position and the third position respectively; the second frame includes a fourth position and a fifth position, and the second frame has a third insulating gap and a fourth insulating gap at the fourth position and the fifth position respectively; a first rotating shaft located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; and a first antenna, the first antenna including: a first radiator, the first radiator including a conductive portion of the first frame between the first position and the second position, at least a portion of the first radiator is spaced apart from the floor, and a first feeding circuit, the first radiator includes a first feeding point, and the first feeding circuit is coupled to the first feeding point to feed a radio frequency signal in a first frequency band; a second antenna, the second antenna including: a second radiator, the second radiator including a conductive portion of the second frame between the fourth position and the fifth position, at least a portion of the second radiator is spaced apart from the floor, a second feeding circuit, the second radiator includes a second feeding point, and the second feeding circuit is coupled to the second feeding point to feed a radio frequency signal in a second frequency band, and a first element, the second radiator includes a first connection point, the first element is inductive, and the first element is coupled between the first connection point and the floor; the first antenna and the second antenna further include: a parasitic stub, the parasitic stub including a conductive portion of the first frame between the second position and the third position, at least a portion of the parasitic stub is spaced apart from the floor; wherein, based on the electronic device being in a folded state, at least a portion of the parasitic stub and the second radiator overlap in a first direction, and the first radiator and the second radiator are displaced in the first direction, the first direction being the thickness direction of the electronic device; the center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz.

[0043] In combination with the second aspect, in some implementations of the second aspect, based on the electronic device being in a folded state, the distance between the second position and the fourth position is less than the distance between the second position and the fifth position; the distance between the first connection point and the fourth position is greater than the distance between the first connection point and the fifth position, and the distance between the second feeding point and the fourth position is less than the distance between the second feeding point and the fifth position.

[0044] In combination with the second aspect, in some implementations of the second aspect, the first connection point is located in the second current maximum region of the second radiator, and the second current maximum region is generated by the coupling of the second antenna.

[0045] In combination with the second aspect, in some implementations of the second aspect, the first radiator is used to generate a first resonance, and the resonance frequency band of the first resonance includes the first frequency band; the second radiator and the first element are used to generate a second resonance and a third resonance, the resonance frequency band of the second resonance includes the second frequency band, the resonance point frequency of the second resonance is greater than or equal to the resonance point frequency of the first resonance, and the resonance point frequency of the third resonance is less than the resonance point frequency of the first resonance; the parasitic stub is used to generate a first parasitic resonance, and the resonance point frequency of the first parasitic resonance is greater than the resonance point frequency of the second resonance.

[0046] In combination with the second aspect, in some implementations of the second aspect, the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz.

[0047] In combination with the second aspect, in some implementations of the second aspect, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0048] In combination with the second aspect, in some implementations of the second aspect, at the resonance point of the second resonance, the currents on the second radiator are in the same direction, and / or, at the resonance point of the third resonance, the currents on the second radiator include some reverse currents.

[0049] In combination with the second aspect, in some implementations of the second aspect, the first parasitic resonance is used to improve the radiation efficiency of the first antenna in the first frequency band, and / or, the third resonance is used to improve the isolation between the first antenna and the second antenna in the first frequency band.

[0050] In connection with the second aspect, in certain implementations of the second aspect, the electronic device further includes a second component, the parasitic stub includes a second connection point, the second component is capacitive, and the second component is coupled between the second connection point and the ground plane.

[0051] In connection with the second aspect, in certain implementations of the second aspect, the distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

[0052] In connection with the second aspect, in certain implementations of the second aspect, the second connection point is located in a third current maximum region of the parasitic stub, and the third current maximum region is generated by coupling of the first antenna.

[0053] In connection with the second aspect, in certain implementations of the second aspect, the second component is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

[0054] In connection with the second aspect, in certain implementations of the second aspect, the first frame is coupled to the ground plane at the first position; wherein, the first insulating gap and the third insulating gap are aligned, and / or, the first insulating gap and the fourth insulating gap are aligned.

[0055] In connection with the second aspect, in certain implementations of the second aspect, the second frame further includes a sixth position, the fifth position is located between the fourth position and the sixth position, and the second frame is coupled to the ground plane at the sixth position; the second radiator includes a conductive portion of the second frame between the fourth position and the sixth position, the first connection point is located on the second radiator between the fourth position and the fifth position; the second antenna further includes a third component, the second radiator includes a third connection point and a fourth connection point, the fourth insulating gap is located between the third connection point and the fourth connection point, and the third component is coupled between the third connection point and the fourth connection point.

[0056] In connection with the second aspect, in certain implementations of the second aspect, the distance between the fourth insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5 mm.

[0057] In combination with the second aspect, in certain implementations of the second aspect, the first frame further includes a seventh position, the third position is located between the second position and the seventh position, and the first frame is coupled to the floor at the seventh position; the parasitic stub includes the conductive portion of the first frame between the second position and the seventh position; the first antenna and the second antenna further include a fourth element, the parasitic stub includes a fifth connection point and a sixth connection point, the second insulating gap is located between the fifth connection point and the sixth connection point, and the fourth element is coupled between the fifth connection point and the sixth connection point.

[0058] In combination with the second aspect, in certain implementations of the second aspect, the distance between the second insulating gap and the fifth connection point and the sixth connection point is less than or equal to 5 mm.

[0059] In combination with the second aspect, in certain implementations of the second aspect, the length L1 of the first frame between the first position and the second position and the length L2 of the first frame between the second position and the third position satisfy: L1×150% ≤ L2.

[0060] In combination with the second aspect, in certain implementations of the second aspect, the first frequency band includes 1578.42 ± 1.023 MHz, the second frequency band includes 1.71 GHz - 1.785 GHz, and / or, the first frequency band includes 2.4 GHz - 2.4835 GHz, the second frequency band includes 2.5 GHz - 2.57 GHz or 2.496 GHz - 2.69 GHz.

[0061] In combination with the second aspect, in certain implementations of the second aspect, the second frame between the fourth position and the fifth position does not include a ground point.

[0062] In a third aspect, an electronic device is provided, including: a first frame and a floor, the first frame including a first position, a second position, a third position, and a fourth position arranged in sequence, the first frame being coupled to the floor or having an insulating gap at the first position, the first frame having a second insulating gap and a third insulating gap at the second position and the third position respectively, the first frame being coupled to the floor or having an insulating gap at the fourth position; a first antenna, the first antenna including: a first radiator, the first radiator including a conductive portion of the first frame between the first position and the second position, at least a portion of the first radiator being spaced apart from the floor, and a first feeding circuit, the first radiator including a first feeding point, the first feeding circuit being coupled to the first feeding point to feed a radio frequency signal in a first frequency band; a second antenna, the second antenna including: a second radiator, the second radiator including a conductive portion of the first frame between the third position and the fourth position, at least a portion of the second radiator being spaced apart from the floor, and a second feeding circuit, the second radiator including a second feeding point, the second feeding circuit being coupled to the second feeding point to feed a radio frequency signal in a second frequency band; the electronic device further including: a first parasitic stub, the first parasitic stub including a conductive portion of the first frame between the second position and the third position, at least a portion of the first parasitic stub being spaced apart from the floor, and a first element, the first element being inductive, the first parasitic stub including a first connection point, the first element being coupled between the first connection point and the floor; wherein, the center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz.

[0063] In combination with the third aspect, in some implementation manners of the third aspect, the distance between the first connection point and the second position is greater than the distance between the first connection point and the third position.

[0064] In combination with the third aspect, in some implementation manners of the third aspect, the first connection point is located in a first current maximum point region of the first parasitic stub, and the first current maximum point region is generated by coupling of the second antenna.

[0065] In combination with the third aspect, in some implementation manners of the third aspect, the first element is used to improve the isolation degree between the first antenna and the second antenna in the first frequency band.

[0066] In combination with the third aspect, in some implementation manners of the third aspect, the first antenna and the second antenna further include a second element, the second element is capacitive, the first parasitic stub includes a second connection point, and the second element is coupled between the second connection point and the ground plane.

[0067] In combination with the third aspect, in some implementation manners of the third aspect, the distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

[0068] In combination with the third aspect, in some implementation manners of the third aspect, the second connection point is located in a third current maximum point region of the first parasitic stub, and the third current maximum point region is generated by coupling of the first antenna.

[0069] In combination with the third aspect, in some implementation manners of the third aspect, the second element is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

[0070] In combination with the third aspect, in some implementation manners of the third aspect, the first frame is coupled to the ground plane at the first position, and / or the first frame is coupled to the ground plane at the fourth position.

[0071] In combination with the third aspect, in some implementation manners of the third aspect, the first frame is coupled to the ground plane at the fourth position; the second antenna further includes a third element, the second radiator includes a third connection point, the first parasitic stub includes a fourth connection point, and the third element is coupled between the third connection point and the fourth connection point.

[0072] In combination with the third aspect, in some implementation manners of the third aspect, the distance between the second insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5 mm.

[0073] In combination with the third aspect, in some implementation manners of the third aspect, the electronic device further includes a first housing, a second housing, and 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. Wherein, the first housing includes the first frame, and the second housing includes a second frame. Wherein, the second frame includes a fifth position and a sixth position. The second frame is coupled to the floor or has an insulating gap at the fifth position, and the second frame is coupled to the floor or has an insulating gap at the sixth position. The electronic device further includes a second parasitic stub. The second parasitic stub includes a conductive portion of the second frame between the fifth position and the sixth position. At least a part of the second parasitic stub is spaced apart from the floor. Based on the electronic device being in a folded state, the second parasitic stub and the first radiator at least partially overlap in a first direction, and the first direction is the thickness direction of the electronic device.

[0074] In combination with the third aspect, in some implementation manners of the third aspect, the second parasitic stub is used to improve the radiation efficiency of the first antenna in the first frequency band.

[0075] In combination with the third aspect, in some implementation manners of the third aspect, the electronic device further includes a first housing, a second housing, and 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. Wherein, the first housing includes the first frame, and the second housing includes a second frame. Wherein, the second frame includes a seventh position and an eighth position. The second frame is coupled to the floor or has an insulating gap at the seventh position, and the second frame is coupled to the floor or has an insulating gap at the eighth position. The electronic device further includes a third parasitic stub. The third parasitic stub includes a conductive portion of the second frame between the seventh position and the eighth position. At least a part of the third parasitic stub is spaced apart from the floor. Based on the electronic device being in a folded state, the third parasitic stub and the second radiator at least partially overlap in a first direction, and the first direction is the thickness direction of the electronic device.

[0076] In combination with the third aspect, in some implementation manners of the third aspect, the third parasitic stub is used to improve the radiation efficiency of the second antenna in the second frequency band.

[0077] In combination with the third aspect, in some implementation manners of the third aspect, the electronic device further includes a first housing, a second housing, and a first rotating shaft. The first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; wherein, the first housing includes the first frame, and the second housing includes a second frame; wherein, the second frame includes a fifth position, a sixth position, a seventh position, and an eighth position arranged in sequence. The second frame is coupled to the floor at the fifth position, and the second frame has a third insulating gap and a fourth insulating gap at the sixth position and the seventh position respectively. The second frame is coupled to the floor at the eighth position; the electronic device further includes a second parasitic stub and a third parasitic stub. The second parasitic stub includes a conductive portion of the second frame between the fifth position and the sixth position. At least a part of the second parasitic stub is spaced apart from the floor. The third parasitic stub includes a conductive portion of the second frame between the sixth position and the eighth position. At least a part of the third parasitic stub is spaced apart from the floor; the second antenna further includes a fourth element. The third parasitic stub includes a fifth connection point and a sixth connection point. The fourth insulating gap is located between the fifth connection point and the sixth connection point. The fourth element is coupled between the fifth connection point and the sixth connection point; based on the electronic device being in a folded state, at least a part of the second parasitic stub and the first radiator overlap in a first direction, and at least a part of the third parasitic stub and the second radiator overlap in the first direction. The first direction is the thickness direction of the electronic device.

[0078] In combination with the third aspect, in some implementation manners of the third aspect, the second parasitic stub is used to improve the radiation efficiency of the first antenna in the first frequency band, and / or, the third parasitic stub is used to improve the radiation efficiency of the second antenna in the second frequency band.

[0079] In combination with the third aspect, in some implementation manners of the third aspect, based on the electronic device being in a folded state, the first insulating gap is aligned with the third insulating gap, and / or, the second insulating gap is aligned with the fourth insulating gap.

[0080] In combination with the third aspect, in some implementation manners of the third aspect, the length L1 of the first frame between the first position and the second position and the length L2 of the first frame between the second position and the third position satisfy: L1×150% ≤ L2.

[0081] In combination with the third aspect, in some implementations of the third aspect, the first frequency band includes 1578.42 ± 1.023 MHz, the second frequency band includes 1.71 GHz - 1.785 GHz, and / or, the first frequency band includes 2.4 GHz - 2.4835 GHz, and the second frequency band includes 2.5 GHz - 2.57 GHz or 2.496 GHz - 2.69 GHz.

[0082] In combination with the third aspect, in some implementations of the third aspect, the first frame between the second position and the third position does not include a ground point. Description of the Drawings

[0083] Figure 1 is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0084] Figure 2 is a schematic structural diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0085] Figure 3 is a schematic structural diagram of the foldable electronic device 100 in an outward folding state.

[0086] Figure 4 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0087] Figure 5 is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0088] Figure 6 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0089] Figure 7 is a schematic diagram of the structure of the common mode of an antenna provided by the present application and the corresponding current and electric field distributions.

[0090] Figure 8 is a schematic diagram of the structure of the differential mode of another antenna provided by the present application and the corresponding current and electric field distributions.

[0091] Figure 9 is a schematic diagram of a foldable electronic device 100 in an unfolded state provided by an embodiment of the present application.

[0092] Figure 10 is a schematic diagram of a foldable electronic device 100 in a folded state provided by an embodiment of the present application.

[0093] Figure 11 is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0094] Figure 12 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0095] Figure 13 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0096] Figure 14 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0097] Figure 15 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0098] Figure 16 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0099] Figure 17 It is the simulation result of the S parameters of the first antenna and the second antenna when the first element and the second element are not set.

[0100] Figure 18 It is the simulation result of the S parameters of the first antenna and the second antenna when only the first element is set.

[0101] Figure 19 It is the simulation result of the S parameters of the first antenna and the second antenna when the first element and the second element are set.

[0102] Figure 20 It is the simulation result of the radiation efficiency and the system efficiency of the second antenna.

[0103] Figure 21 It is Figure 16 A schematic diagram of the current and electric field distribution at the resonance point (1.57 GHz) of the first resonance of the first antenna in the electronic device 100 shown.

[0104] Figure 22 It is Figure 16 A schematic diagram of the current and electric field distribution at the resonance point (1.74 GHz) of the second resonance of the second antenna in the electronic device 100 shown.

[0105] Figure 23 It is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0106] Figure 24 It is Figure 23 The simulation result of the S parameters of the first antenna in the electronic device 100 shown.

[0107] Figure 25 It is Figure 23 The simulation result of the S parameters of the second antenna in the electronic device 100 shown.

[0108] Figure 26 is Figure 23 The simulation results of the radiation efficiency and system efficiency of the first antenna in the electronic device 100 shown in the figure.

[0109] Figure 27 is Figure 23 The simulation results of the radiation efficiency and system efficiency of the second antenna in the electronic device 100 shown in the figure.

[0110] Figure 28 It is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0111] Figure 29 It is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0112] Figure 30 It is the simulation results of the S parameters of the first antenna and the second antenna when the first element and the second element are not set.

[0113] Figure 31 It is the simulation results of the S parameters of the first antenna and the second antenna when the first element and the second element are set.

[0114] Figure 32 It is a schematic diagram of yet another electronic device 100 provided by an embodiment of the present application.

[0115] Figure 33 It is a schematic diagram of yet another electronic device 100 provided by an embodiment of the present application.

[0116] Figure 34 It is a schematic diagram of yet another electronic device 100 provided by an embodiment of the present application.

[0117] Figure 35 is Figure 34 The simulation results of the radiation efficiency and system efficiency of the first antenna and the second antenna in the electronic device 100 shown in the figure.

[0118] Figure 36 is Figure 34 The simulation results of the radiation efficiency and system efficiency of the second antenna in the electronic device 100 shown in the figure. Detailed implementation manners

[0119] Hereinafter, the terms that may appear in the embodiments of the present application will be explained.

[0120] It should be understood that the term "and / or" used herein is merely a description of the same fields of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0121] For the "within... range" used in this application, unless it is separately stated that the end values are not included, it is default to include the two end values of the range. For example, within the range of 1 to 5, the two values 1 and 5 are included.

[0122] Coupling: It can be understood as direct coupling and / or indirect coupling. "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 physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foils or wires on a printed circuit board (PCB) that can transmit electrical signals. "Indirect coupling" can be understood as electrical conduction between two conductors in a non-contact manner through air separation. 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 the coupling between the gaps of two conductive parts.

[0123] Element / device: Includes at least one of lumped elements / devices and distributed elements / devices.

[0124] Lumped element / device: Refers to the general term for all elements when the size of the element is much smaller than the wavelength corresponding to the operating frequency of the circuit. For a signal, regardless of the time, the characteristics of the element always remain fixed and are independent of frequency.

[0125] Distributed element / device: Different from lumped elements, when the size of the element is about the same as or larger than the wavelength corresponding to the operating frequency of the circuit, when a signal passes through the element, the characteristics of each point of the element itself will vary with the change of the signal. At this time, the element as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed element.

[0126] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitor) refers to the equivalent capacitance formed by a certain gap between two conductive parts.

[0127] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductance elements; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a certain length of conductive parts.

[0128] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0129] 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 may be referred to as a linear antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a bracket conductor, and may also be referred to as a bracket antenna. In one embodiment, the linear radiator, or the radiator of the linear antenna, has a wire diameter (e.g., including thickness and width) much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., 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 dipole 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 generally includes two radiating branches, and each branch is fed by a feeding unit 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 PIFA, Planar Inverted FAntenna). 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 a circle, a rectangle, a ring, etc., and the present application does not limit the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0130] The radiator may also include slots or slits formed on a conductor. For example, closed or semi-closed slots or slits are formed on a grounded conductor surface. In one embodiment, the slotted or slit radiator may be simply referred to as a slot antenna or a slit antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slit 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 around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiator with a closed slot or slit may be simply referred to as a closed slot antenna. In one embodiment, the radiator with a semi-closed slot or slit (e.g., adding an opening to a closed slot or slit) may be simply referred to as an open slot antenna. In some embodiments, the shape of the slit is elongated. In some embodiments, the length of the slit is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slit is about an integer multiple of the wavelength (e.g., one dielectric wavelength). In some embodiments, the slit can be fed by a transmission line bridging one or both of its sides. Thus, a radio frequency electromagnetic field is excited on the slit, and electromagnetic waves are radiated into space. In one embodiment, the radiator of the slot antenna or slit antenna can be realized by a conductive frame grounded at both ends, and can also be referred to as a frame antenna; in this embodiment, it can be considered that the slot antenna or slit antenna includes a linear radiator, which is spaced from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slit. In one embodiment, the radiator of the slot antenna or slit antenna can be realized by a support conductor grounded at both ends, and can also be referred to as a support antenna.

[0131] The feeding circuit is a combination of all circuits for receiving and transmitting radio frequency signals. The feeding circuit may include a transceiver and a radio frequency front-end circuit (RF front end). In some cases, "feeding circuit" is narrowly understood as a radio frequency integrated circuit (RFIC), and an RFIC can be considered to include a radio frequency front-end chip and a transceiver. The feeding 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.

[0132] In some embodiments, the electronic device may further include a test socket (or referred to as a radio frequency socket or a radio frequency test socket). This test socket can be used to insert a coaxial cable to test the characteristics of the radio frequency front-end circuit or the radiator of the antenna through the cable. The radio frequency front-end circuit can be considered as the circuit part coupled between the test socket and the transceiver.

[0133] In some embodiments, the radio frequency front-end circuit can be integrated into a radio frequency front-end chip in an electronic device, or the radio frequency front-end circuit and the transceiver can be integrated into a radio frequency chip in the electronic device.

[0134] 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, signals are transmitted through a radio frequency channel in a transceiver (e.g., a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit. For example, signals are processed by a tuning circuit or an amplifier in a radio frequency front-end.

[0135] It should also be understood that two of the first / second / ... / Nth feeding circuits in the present application generally correspond to two radio frequency test sockets in an electronic device.

[0136] The matching circuit is a circuit for adjusting the radiation characteristics of the antenna. In one embodiment, the matching circuit is coupled between the feeding circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test socket and the radiator. Generally, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit can include a tuning circuit and / or components. The tuning circuit can be a component for switching the coupled connection of the radiator. The matching circuit has the functions of impedance matching and / or frequency tuning. Generally, it is considered to be part of the antenna.

[0137] The grounding structure / feeding structure. The grounding structure / feeding structure can include connecting members, such as metal shrapnel. The radiator is coupled to the ground plane through the grounding structure / the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding wire, and the grounding structure can include a grounding wire.

[0138] Term / Point: The "Term / Point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator should not be narrowly understood as necessarily being an end point or end part physically disconnected from other radiators. It can also be considered as a certain point or a certain section on a continuous radiator. In one embodiment, the "Term / Point" can include the connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feeding end / feeding point can be the coupling area on the antenna radiator that is coupled to the feeding structure or feeding circuit (for example, the area facing a part of the feeding circuit). Another example is that the grounding end / grounding point can be the connection / coupling area on the antenna radiator that is coupled to the grounding structure or grounding circuit. Open end / Closed end: In some embodiments, the open end and the closed end are, for example, defined relative to whether they are grounded. The closed end is grounded and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, defined relative to other conductive bodies. The closed end is electrically connected to other conductive bodies and the open end is not electrically connected to other conductive bodies. In one embodiment, the open end can also be called a floating end, a free end, an open end, or an open-circuit end. In one embodiment, the closed end can also be called a grounding end or a short-circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled through the open end to transfer coupled energy (which can be understood as transferring current).

[0139] In some embodiments, the understanding of the "closed end" can also be from the perspective of current distribution. The closed end or the grounding end, etc., can be understood as the point with a large current on the radiator, or can also be understood as the point with a small electric field on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the closed end does not change the current distribution characteristics of the point with a large current / small electric field. In one embodiment, making a slit (such as a slit filled with insulating material) at or near the closed end does not change the current distribution characteristics of the point with a large current / small electric field.

[0140] In some embodiments, the understanding of the "open end" can also be from the perspective of current distribution. The open end or the floating end, etc., can be understood as the point with a small current on the radiator, or can also be understood as the point with a large electric field on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the open end does not change the current distribution characteristics of the point with a small current / large electric field.

[0141] It should be understood that when an electronic device (such as a capacitor, an inductor, etc.) is coupled to the radiator end at a slit (from the structure of the radiator, it is similar to the opening of an open end or a floating end), it can make the radiator end at this slit be a point with a large current / small electric field. In this case, it should be understood that the radiator end at this slit is actually a closed end or a grounding end, etc.

[0142] The "floating radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to the feeder / feeding stub and / or the ground wire / grounding stub, but is fed and / or grounded through an indirect coupling method.

[0143] It should be understood that the "floating" in "floating end" and "floating radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the floating radiator can be, for example, a radiator disposed on the inner surface of an insulating rear cover.

[0144] The same / different directions of the current mentioned in the embodiments of the present application should be understood as the directions of the main currents on the conductors on the same side being the same / different. For example, when exciting a current with the same distribution (e.g., the current path is also bent or circular) on a conductor in a bent or circular shape, it should be understood that, for example, although the main currents excited on the two sides of a circular conductor (e.g., the conductors around a gap, on the conductors on both sides of the gap) are in opposite directions when viewed from the direction, it still belongs to the definition of the current with the same distribution in the embodiments of the present application. In one embodiment, the same direction of the current on a conductor can mean that there is no reverse point of the current on the conductor. In one embodiment, the different direction of the current on a conductor can mean that there is at least one reverse point of the current on the conductor. In one embodiment, the same direction of the current on two conductors can mean that there is no reverse point of the current on both of these two conductors and the current flows in the same direction. In one embodiment, the different direction of the current on two conductors can mean that there is no reverse point of the current on both of these two conductors and the current flows in opposite directions. The same / different directions of the current on multiple conductors can be understood accordingly.

[0145] Resonance / resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range where resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that unless otherwise specified, when the antenna / radiator mentioned in the present application generates "the first / second... resonance", the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or rather, the resonance with the lowest frequency 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 correspondingly generate a fundamental mode resonance.

[0146] Resonant frequency band: The range of the resonant frequency is the resonant frequency band, and the return loss characteristic of any frequency point within the resonant frequency band can be less than -6 dB or -5 dB.

[0147] Communication Band / Operating Band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna that supports Band B40 has an operating band that includes frequencies in the range of 2300 MHz to 2400 MHz, or in other words, the operating band of this antenna includes Band B40. The frequency range that meets the index requirements can be regarded as the operating band of the antenna.

[0148] The resonant band and the operating band can be the same or can partially overlap. In one embodiment, one or more resonant bands of the antenna can cover one or more operating bands of the antenna.

[0149] Electrical Length: It can refer to the ratio of the 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:

[0150]

[0151] where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0152] Wavelength: Or operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency from 1920 MHz to 1980 MHz) is 1955 MHz, then the operating wavelength can be the wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non - center frequency of the resonant frequency or the operating band.

[0153] It should be understood that the wavelength of the radiation signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3×10 8 m / s. The wavelength of the radiation signal in a medium can be calculated as follows: medium where ε is the relative permittivity of the medium. The wavelength in the embodiments of this application usually refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency from 1920 MHz to 1980 MHz) is 1955 MHz, then the wavelength can be the medium wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non - center frequency of the resonant frequency or the operating band. For ease of understanding, the medium wavelength mentioned in the embodiments of this application can be simply calculated through the relative permittivity of the medium filled on one or more sides of the radiator.

[0154] Antenna system efficiency (total efficiency): It refers to the ratio of the input power to the output power at the port of the antenna.

[0155] Antenna radiation efficiency: It refers to the ratio of the power radiated by the antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power, the ohmic loss power of the metal, and / or the dielectric loss power. The radiation efficiency is a value that measures the radiation ability of the antenna, and both the metal loss and the dielectric loss are factors affecting the radiation efficiency.

[0156] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship with dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[0157] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmission power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the smaller the radiation efficiency of the antenna.

[0158] The antenna return loss can be expressed by the S11 parameter, and S11 belongs to one of the S parameters. S11 represents the reflection coefficient, and this parameter can characterize the pros and cons of the antenna transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, that is, the more energy actually enters the antenna, and the higher the system efficiency of the antenna; the larger the S11 parameter, the larger the antenna return loss, and the lower the system efficiency of the antenna.

[0159] It should be noted that in engineering, generally, the S11 value of -6 dB is used as the standard. When the S11 value of the antenna is less than -6 dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is good.

[0160] Antenna pattern: Also known as the radiation pattern. It refers to the graph of the relative field strength (normalized modulus value) of the antenna radiation field changing with direction at a certain distance (far field) from the antenna, and is usually represented by two mutually perpendicular plane patterns passing through the maximum radiation direction of the antenna.

[0161] The antenna pattern usually has multiple radiation beams. Among them, the radiation beam with the largest radiation intensity is called the main lobe, and the remaining radiation beams are called side lobes or minor lobes. Among the side lobes, the side lobe in the direction opposite to the main lobe is also called the back lobe.

[0162] Directivity: Also known as the directivity of the antenna. It refers to the ratio of the maximum power density to the average value on the antenna radiation pattern at a certain distance (far field) from the antenna, which is a dimensionless ratio greater than or equal to 1. It can be used to indicate the energy radiation characteristics of the antenna. When the directivity coefficient is larger, it means that the proportion of the energy radiated by the antenna in a certain direction is more, and the energy radiation is more concentrated.

[0163] Antenna gain: It is used to characterize the degree to which the antenna concentrates and radiates the input power. Generally, the narrower the main lobe and the smaller the side lobes of the antenna radiation pattern, the higher the antenna gain.

[0164] Polarization direction of the antenna: At a given point in space, the electric field strength E (vector) is a function of time t. As time goes by, the end point of the vector periodically depicts a trajectory in space. If the trajectory is a straight line and perpendicular to the ground, it is called vertical polarization; if it is horizontal to the ground, it is called horizontal polarization. If the trajectory is an ellipse or a circle and rotates in the right-hand or clockwise direction when observed along the propagation direction as time passes, it is called right-hand circular polarization (RHCP); if it rotates in the left-hand or counterclockwise direction as time passes, it is called left-hand circular polarization (LHCP).

[0165] Ground (GND): It can generally refer to at least a part of any ground layer, ground plane, or ground metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of the above-mentioned ground layers, ground planes, or ground components. "Ground" can be used for grounding components in an electronic device. In one embodiment, "ground" can be the ground layer of the circuit board of the electronic device, or the ground plane formed by the middle frame of the electronic device, or the ground 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 - 14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric layers or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, and the trace layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on the circuit board or connected to the circuit board; or electrically connected to the trace layer and / or the ground layer in the circuit board. For example, a radio frequency source is disposed on the trace layer.

[0166] Any of the above ground layers, or ground plates, or ground metal layers is made of a conductive material. In one embodiment, the conductive material may be any one of the following materials: copper, aluminum, stainless steel, brass and their alloys, 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 on an insulating substrate, and tin-plated copper, cloth impregnated with graphite powder, a substrate coated with graphite, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plate / ground metal layer can also be made of other conductive materials.

[0167] Grounding: It means coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as achieving physical grounding at specific positions on the frame through some structural members of the middle frame (or called, physical ground). In one embodiment, grounding can be achieved through device grounding, such as grounding through devices such as capacitors / inductors / resistors in series or in parallel (or called, device ground).

[0168] Next, the technical solutions of the embodiments of the present application will be described in conjunction with the accompanying drawings.

[0169] As Figure 1 shown, the electronic device 100 may include: a cover 13, a display / display module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 may be a cover glass, or may be replaced with a cover made of other materials, such as a cover made of PET (Polyethylene terephthalate) material, etc.

[0170] Among them, the cover 13 may be disposed closely to the display module 15, and may mainly be used to protect the display module 15 and prevent dust.

[0171] In one embodiment, the display module 15 may include a liquid crystal display panel (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and the embodiments of the present application do not limit this.

[0172] The middle frame 19 mainly plays a supporting role for the whole machine. Figure 1As shown in the figure, the PCB 17 is disposed between the middle frame 19 and the rear cover 21. It should be understood that in one embodiment, the PCB 17 can also be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. Among them, the printed circuit board PCB 17 can adopt a flame-retardant material (FR-4) dielectric board, or a Rogers dielectric board, or a hybrid dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a flame-retardant material grade, and the Rogers dielectric board is a high-frequency board. Components are carried on the PCB 17, for example, radio frequency chips, etc. In one embodiment, a metal layer can be provided on the printed circuit board PCB 17. This metal layer can be used for grounding the components carried on the printed circuit board PCB 17, and can also be used for grounding other components, such as a bracket antenna, a frame antenna, etc. This metal layer can be called a floor, or a ground plane, or a ground layer. In one embodiment, this metal layer can be formed by etching metal on the surface of any layer of dielectric board in the PCB 17. In one embodiment, the metal layer for grounding can be disposed on the side of the printed circuit board PCB 17 close to the middle frame 19. In one embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of its ground layer. In one embodiment, the metal middle frame 19 can also be used for grounding the above components. The electronic device 100 can also have other floors / ground planes / ground layers. As described above, details are not repeated here.

[0173] Due to the compactness inside the electronic device, a floor / ground plane / ground layer is usually provided in the internal space within 0-2 mm from the inner surface of the frame (for example, the printed circuit board, the middle frame, the screen metal layer, the battery, etc. can all be regarded as part of the floor). In one embodiment, a dielectric is filled between the frame and the floor. The length and width of the rectangle formed by surrounding the inner surface contour of the filled dielectric can be simply regarded as the length and width of the floor; or the length and width of the rectangle formed by surrounding the contour formed by superimposing all the conductive parts inside the frame can be regarded as the length and width of the floor.

[0174] Among them, the electronic device 100 can also include a battery (not shown in the figure). The battery can be disposed between the middle frame 19 and the rear cover 21, or can be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery can be disposed between the main board and the sub-board. Among them, the main board can be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board can be disposed between the middle frame 19 and the lower edge of the battery.

[0175] The electronic device 100 may further include a frame 11, and the frame 11 may include a conductive material such as metal. The frame 11 may be disposed between the display module 15 and the rear cover 21 and extend circumferentially around the periphery of the electronic device 100. The frame 11 may have four sides surrounding the display module 15 to help fix the display module 15.

[0176] In one implementation, the frame 11 mainly including a conductive material may be referred to as the conductive frame or metal frame of the electronic device 100, which is suitable for the industrial design (ID) of a metal appearance. In one implementation, the outer surface of the frame 11 is mainly a conductive material, such as a metal material, so as to form the appearance of a metal frame. In these implementations, the conductive part including the outer surface in the frame 11 may be used as the antenna radiator of the electronic device 100 and is generally referred to as the frame antenna.

[0177] In another implementation, the outer surface of the frame 11 is mainly a non-conductive material, such as plastic, to form the appearance of a non-metal frame, which is suitable for non-metal ID. In one implementation, the inner surface of the frame 11 may include a conductive material, such as a metal material. In this implementation, the conductive part on the inner surface of the frame 11 may be used as the antenna radiator of the electronic device 100. It should be understood that the radiator disposed on the inner surface of the frame 11 (or the conductive material on the inner surface) may be arranged against the non-conductive material of the frame 11 to minimize the volume occupied by the radiator and be closer to the outside of the electronic device 100 to achieve a better signal transmission effect, and it may also be referred to as the frame antenna. It should be noted that the antenna radiator being arranged against the non-conductive material of the frame 11 means that the antenna radiator may be arranged closely against the inner surface of the non-conductive material, may be embedded inside the non-conductive material, or may be arranged close to the inner surface of the non-conductive material. For example, there may be a certain small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive material and the non-conductive material can be regarded as part of the frame 11.

[0178] It should be understood that there may be insulating gaps on the frame 11. The conductor portions of the frame between the insulating gaps, between the insulating gaps and the ground point, and / or between the insulating gaps and the ground point serve as radiators, thereby forming a frame antenna (it should be understood that the radiator of the frame antenna may also include the conductor portion of the frame between the ground point and the ground point). Among them, when the frame 11 is formed of a conductive material such as metal, the insulating gap can be understood as the gap in the frame 11 filled with a non-metallic material (insulating material). In this case, the gap is visible on the appearance surface. When the outer surface of the frame 11 is a non-conductive material, the insulating gap can be understood as the end of the radiator on the inner surface of the frame 11 (for example, the end not electrically connected to other radiators or conductors), or as the gap formed between the radiators on the inner surface of the frame 11. A non-metallic material (insulating material) can be provided in this gap, or a non-metallic material may not be provided, for example, filled with air. In this case, the gap is not visible on the appearance surface.

[0179] The middle frame 19 may include the frame 11. The middle frame 19 including the frame 11, as an integral part, can support the electronic devices in the whole machine. The cover plate 13 and the rear cover 21 are respectively covered along the upper and lower edges of the frame to form the outer shell or housing of the electronic device. In one embodiment, the cover plate 13, the rear cover 21, the frame 11, and / or the middle frame 19 can be collectively referred to as the outer shell or housing of the electronic device 100. It should be understood that the "outer shell or housing" can be used to refer to a part or all of any one of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19, or to a part or all of any combination of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19.

[0180] The frame 11 can at least partially serve as an antenna radiator to receive / transmit frequency signals. There may be a gap between this part of the frame serving as the radiator and the other parts of the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 can be provided with apertures at this part of the frame serving as the radiator to facilitate the radiation of the antenna.

[0181] Alternatively, the frame 11 may not be regarded as a part of the middle frame 19. In one embodiment, the frame 11 can be connected to the middle frame 19 and integrally formed. In another embodiment, the frame 11 may include a protruding member extending inward to be connected to the middle frame 19, for example, connected by a spring piece, a screw, welding, etc. The protruding member of the frame 11 can also be used to receive the feeding signal, so that at least a part of the frame 11 serves as the radiator of the antenna to receive / transmit frequency signals. There may be a gap between this part of the frame serving as the radiator and the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment and the antenna has a good signal transmission function.

[0182] Among them, the rear cover 21 can be a rear cover made of a metal material; it can also be a rear cover made of a non-conductive material, such as a non-metal rear cover like a glass rear cover or a plastic rear cover; it can also be a rear cover made of both conductive and non-conductive materials. In one embodiment, the rear cover 21 including a conductive material can replace the middle frame 19 and, together with the frame 11, serve as an integral part to support the electronic devices in the whole machine.

[0183] In one embodiment, the middle frame 19 and / or the conductive part of the rear cover 21 can serve as the reference ground of the electronic device 100. Among them, the frame 11, PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0184] The antenna of the electronic device 100 can also be arranged inside the housing, such as a bracket antenna, a millimeter-wave antenna, etc. ( Figure 1 not shown in the figure). The clearance of the antenna arranged inside the housing can be obtained by a slit / hole on any one of the middle frame, and / or the frame, and / or the rear cover, and / or the display screen, or by a non-conductive gap / aperture formed between any several of them. The setting of the clearance of the antenna can ensure the radiation characteristics of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive component in the electronic device 100, and the antenna radiates signals to the external space through this non-conductive area. In one embodiment, the form of the antenna 40 can be an antenna form based on a flexible printed circuit (FPC), an antenna form based on laser-direct-structuring (LDS), or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also adopt a transparent structure embedded inside the screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded inside the screen of the electronic device 100.

[0185] Figure 2 is a schematic structural diagram of a foldable electronic device 100 provided by an embodiment of the present application. The foldable electronic device 100 can be an electronic device with a folding function such as a mobile phone, a tablet computer, an e-reader, a laptop computer, a wearable device such as a watch, etc. Figure 2 The illustrated embodiment is described by taking a foldable mobile phone as an example.

[0186] It should be understood that Figure 1 only shows the electronic device 100 including one housing (for example, the above-mentioned middle frame 19). In actual production or design, the electronic device 100 can also include multiple housings to form a foldable electronic device 100.

[0187] Refer to Figure 2, the foldable electronic device 100 may include a flexible display screen 110 (which may correspond to the display module 15 in Figure 1 , a first frame 121 (which may correspond to the frame 11 in Figure 1 ), a first cover 122, a second frame 123 (which may correspond to the frame 11 in Figure 1 ), a second cover 124, and a rotating shaft 125. In some embodiments, the first frame 121, the first cover 122, the second frame 123, and the second cover 124 may form a first housing 126 (which may correspond to the middle frame 19 in Figure 1 ) and a second housing 127 (which may correspond to the middle frame 19 in Figure 1 ) that support the flexible display screen 110. In other embodiments, at least one of the first cover 122 and the second cover 124 may include a display screen.

[0188] Figure 2 The filled dot pattern in

[0189] may schematically represent the flexible display screen 110. The flexible display screen 110 may be highly flexible and bendable, providing users with a new interaction method based on the foldable characteristics.

[0189] 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 rotating shaft 125. The foldable display portion 113 may be connected between the first display portion 111 and the second display portion 112.

[0190] The first frame 121 may surround the outer periphery of the first cover 122, and at least a portion of the first frame 121 may also surround the outer periphery of the first display portion 111. The first display portion 111 may be arranged in parallel and spaced apart from the first cover 122, and the first display portion 111 and the first cover 122 may be located on both sides of the first frame 121. The spaced space between the first display portion 111 and the first cover 122 may be used to arrange the components of the foldable electronic device 100, such as antennas, circuit board assemblies, etc.

[0191] The second frame 123 may surround the outer periphery of the second cover 124, and at least a portion of the second frame 123 may also surround the outer periphery of the second display portion 112. The second display portion 112 may be arranged in parallel and spaced apart from the second cover 124, and the second display portion 112 and the second cover 124 may be located on both sides of the second frame 123. The spaced space between the second display portion 112 and the second cover 124 may be used to arrange the components of the foldable electronic device 100, such as antennas, circuit board assemblies, etc.

[0192] In an embodiment provided by the present application, the cover body and the frame can be two parts of the housing of the foldable electronic device 100. The cover body and the frame can be connected, and the form of this connection can be different from assembly methods such as snap connection, adhesion, welding, riveting, clearance fit, etc. The connection relationship between the cover body and the frame is usually difficult to be separated. In another embodiment provided by the present application, the cover body and the frame can be two different components. By assembling the cover body and the frame together, the housing of the foldable electronic device 100 can be formed.

[0193] The rotating shaft 125 can be connected between the first housing 126 and the second housing 127. Under the action of the rotating shaft 125, the first housing 126 and the second housing 127 can approach or move away from each other. Correspondingly, the first display portion 111 and the second display portion 112 of the flexible display screen 110 can approach or move away from each other, so that the flexible display screen 110 can be folded or unfolded.

[0194] In one example, the rotating shaft 125 can include, for example, a main shaft, a first connection component, and a second connection component. The first connection component can be fixed to the first cover body 122, the second connection component can be fixed to the second cover body 124, and the first connection component and the second connection component can rotate relative to the main shaft. Through the mutual movement of the first connection component and the second connection component, the mutual movement of the first housing 126 and the second housing 127 can be driven, realizing the opening and closing function of the foldable electronic device 100.

[0195] Figure 2 The foldable electronic device 100 shown is currently in a possible unfolded state. In this unfolded state, the angle between the first housing 126 and the second housing 127 can be 180°, or it can be called a flattened state. The flexible display screen 110 can be in a flattened state as shown in Figure 2 the flattened state shown.

[0196] Among them, the flexible display screen 110 being in a flattened state can be understood as the angle formed between the first display portion 111 corresponding to the first housing 126 and the second display portion 112 corresponding to the second housing 127 being 180°. Due to certain errors that may exist in engineering implementation, when the angle formed between the first display portion 111 and the second display portion 112 is between 170° and 190°, it can be considered that the flexible display screen 110 is in a flattened state.

[0197] Figure 3 Shows a possible folded state of the foldable electronic device 100. Among them, Figure 3 shows an outward folding state of the foldable electronic device 100 (the outward folding state can be simply referred to as the outward folding state). Figure 3 The shown outward folding state can be, for example, a left - right outward folding state or an up - down outward folding state. The following combinesFigure 2 and Figure 3 , illustrate a possible folded state of the foldable electronic device 100.

[0198] In the embodiment 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 reaches the maximum. At this time, the first cover 122 and the second cover 124 may be approximately parallel, spaced apart from each other, and arranged face to face, and the spacing distance between the first cover 122 and the second cover 124 is the smallest. At least part of the first housing 126 and the second housing 127 is received in the space surrounded by the flexible display screen 110; the first display portion 111, the first housing 126, the second housing 127, and the second display portion 112 are stacked in sequence. Similarly, the first display portion 111 and the second display portion 112 may be approximately parallel and spaced apart from each other, and the spacing distance between the first cover 122 and the second cover 124 is less than the spacing distance between the first display portion 111 and the second display portion 112. At this time, the first display portion 111 and the second display portion 112 may be regarded as being on different planes.

[0199] Combined with Figure 2 and Figure 3 , when the foldable electronic device 100 is in an outward folding state, the first cover 122 and the second cover 124 may approach each other, and the first display portion 111 and the second display portion 112 may approach each other. The first display portion 111, the second display portion 112, and the foldable display portion 113 may form a housing area for accommodating the first cover 122, the second cover 124, and the rotating shaft 125. That is to say, the first cover 122, the second cover 124, and the rotating shaft 125 may be received in the spacing space between the first display portion 111 and the second display portion 112.

[0200] It should be understood that the foldable electronic device 100 may be folded inward (the inward folding state may be simply referred to as the inner folding state). When the foldable electronic device 100 is in the inner folding state, the first cover 122 and the second cover 124 may approach each other, and the first display portion 111 and the second display portion 112 may approach each other. The first cover 122, the second cover 124, and the rotating shaft 125 may form a housing area for accommodating the first display portion 111, the second display portion 112, and the foldable display portion 113. That is to say, the first display portion 111, the second display portion 112, and the foldable display portion 113 may be received in the spacing space between the first cover 122 and the second cover 124.

[0201] 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 occupied space of 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. It should be understood that the folded state includes a closed state, in which the occupied space of the foldable electronic device 100 is the smallest; the unfolded state includes a flattened state, in which the occupied space of the foldable electronic device 100 is the largest.

[0202] The foldable electronic device 100 may further include a third housing 128 and a rotating shaft 129, as Figure 4 shown. The rotating shaft 129 may be connected between the third housing 128 and the second housing 127. The third housing 128 and the second housing 127 may approach or move away from each other. As the number of foldable parts of the foldable electronic device 100 increases, with the screen size remaining the same in the unfolded state, the occupied space of the foldable electronic device 100 can be further reduced in the folded state.

[0203] And in Figure 4 the foldable electronic device 100 shown, since it has three foldable parts (the first housing 126, the second housing 127, and the third housing 128), therefore, the foldable electronic device 100 has at least three forms: 1. Unfolded state; 2. Folded state; 3. Partially unfolded state.

[0204] 1. As Figure 4 shown, it is a possible unfolded state of the foldable electronic device 100. In the unfolded state, the angle between the first housing 126, the second housing 127, and the third housing 128 can be approximately 180°. The flexible display screen 110 can be in the unfolded state.

[0205] 2. As Figure 5 shown, it is a possible folded state (three - fold state) of the foldable electronic device 100. In the folded state, the first housing 126 rotates with respect to the second housing 127 along the rotating shaft 125, and the second housing 127 rotates with respect to the third housing 128 along the rotating shaft 129, so that the bending degree of the foldable electronic device 100 reaches the maximum. At this time, the first housing 126, the second housing 127, and the third housing 128 can be regarded as being in different planes.

[0206] It should be understood that for the sake of brevity in discussion, in Figure 5In the structure shown, 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 housing 127 is located between the first housing 126 and the third housing 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 housing 128 is located between the first housing 126 and the second housing 127). The embodiments of the present application do not limit the folded state of the foldable electronic device 100.

[0207] 3. As Figure 6 shown, it is a possible partially unfolded state (two-fold state) of the foldable electronic device 100. In the partially unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°. The second housing 127 and the third housing 128 rotate along the rotating shaft 129 to make the third housing 128 approach the second housing 127. At this time, the first housing 126 and the second housing 127 are regarded as being in the same plane, and the second housing 127 and the third housing 128 can be regarded as being in different planes. In another possible partially unfolded state, the angle between the third housing 128 and the second housing 127 can be approximately 180°, and the first housing 126 and the second housing 127 rotate along the rotating shaft 125 to make the first housing 126 approach the second housing 127.

[0208] Figure 1 and Figure 2 Only some components included in the electronic device 10 and the foldable electronic device 100 are schematically shown, and the actual shapes, actual sizes, and actual structures of these components are not limited by the above drawings.

[0209] 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 regarded as the front, the surface where the back cover is located can be regarded as the back, and the surface where the frame is located can be regarded as the side.

[0210] It should be understood that in the embodiments of the present application, when it is considered that the user holds the electronic device (usually vertically and facing the screen), the orientation of the electronic device has a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when it is considered that the user holds the electronic device (usually vertically and facing the screen), the orientation of the electronic device has a top, a bottom, a left side, and a right side.

[0211] First, Figure 7 and Figure 8 will be used to introduce two antenna modes involved in the present application. Among them, Figure 7 is a schematic diagram of the structure of a common-mode mode of an antenna provided by the present application and the corresponding current and electric field distributions. Figure 8 is a schematic diagram of the structure of a differential-mode mode of another antenna provided by the present application and the corresponding current and electric field distributions.Figure 7 and Figure 8 Both ends of the antenna radiator in Figure 8 are open, and its common-mode and differential-mode can be respectively called line common-mode and line differential-mode.

[0212] It should be understood that the "common mode" or "CM mode" in this application includes line common mode and slot common mode, while the "differential mode" or "DM mode" in this application includes line differential mode and slot differential mode, which can be specifically determined according to the structure of the antenna.

[0213] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode and line differential mode generated on the same radiator, or refers to the slot common mode and slot differential mode generated on the same radiator, which can be specifically determined according to the structure of the antenna.

[0214] 1. Wire common mode (CM)

[0215] Figure 7 In (a) of , both ends of the radiator of antenna 40 are open, and a feeding circuit (not shown in the figure) is connected at the middle position 41. In one embodiment, the feeding form of antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of antenna 40 through the feeding wire 42. It should be understood that symmetrical feed can be understood as one end of the feeding circuit is connected to the radiator, and the other end is coupled to the ground through the floor. Among them, the connection point (feeding point) of the feeding circuit and the radiator 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 a region within a certain range near the above midpoint).

[0216] The middle position 41 of antenna 40 can be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection point of the feeding wire 42 and antenna 40 covers the middle position 41.

[0217] Figure 7 (b) of Figure 7 shows the current and electric field distributions of antenna 40. As Figure 7 shown in (b) of Figure 7 , the current shows a reverse distribution on both sides of the middle position 41, for example, a symmetrical distribution; the electric field shows a same-direction distribution on both sides of the middle position 41. As Figure 7 shown in (b) of Figure 7 , the current at the feeding wire 42 shows a same-direction distribution. Based on the same-direction distribution of the current at the feeding wire 42, Figure 7 the feeding shown in (a) of Figure 7 can be called line CM feeding. Based on the reverse distribution of the current on both sides of the connection point of the radiator and the feeding wire 42, Figure 7The antenna pattern shown in (b) therein can be referred to as the line CM mode (which can also be simply referred to as the CM mode. For example, for a line antenna, the CM mode refers to the line CM mode). Figure 7 The current and electric field shown in (b) therein can be respectively referred to as the current and electric field of the line CM mode.

[0218] The current is stronger at the middle position 41 of the antenna 40 (the current maximum point is near the middle position 41 of the antenna 40) and weaker at both ends of the antenna 40, as Figure 7 shown in (b) therein. The electric field is weaker at the middle position 41 of the antenna 40 and stronger at both ends of the antenna 40.

[0219] 2. Line differential mode (DM)

[0220] As Figure 8 shown in (a) therein, the left and right ends of the two radiators of the antenna 50 are open ends, and a feeding circuit is connected at the middle position 51. In one embodiment, the feeding form of the antenna 50 adopts anti-symmetrical feeding. One end of the feeding circuit is connected to one of the radiators through a feeding wire 52, and the other end of the feeding circuit is connected to the other radiator through the feeding wire 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the radiators.

[0221] It should be understood that the "central anti-symmetrical feeding" mentioned in the present application can be understood as that the positive and negative poles of the feeding unit are respectively connected to two connection points near the above-mentioned midpoints of the radiators. In one embodiment, the signal amplitudes output by the positive and negative poles of the feeding unit are the same and the phases are opposite, for example, the phase difference is 180°±10°.

[0222] Figure 8 shown in (b) therein shows the current and electric field distributions of the antenna 50. As Figure 8 shown in (b) therein, the current shows a co-directional distribution on both sides of the middle position 51 of the antenna 50, for example, an anti-symmetrical distribution; the electric field shows an anti-directional distribution on both sides of the middle position 51. As Figure 8 shown in (b) therein, the current at the feeding wire 52 shows an anti-directional distribution. Based on the anti-directional current distribution at the feeding wire 52, Figure 8 the feeding shown in (a) therein can be referred to as line DM feeding. Based on the co-directional distribution of the current on both sides of the connection between the radiator and the feeding wire 52, Figure 8 the antenna pattern shown in (b) therein can be referred to as the line DM mode (which can also be simply referred to as the DM mode. For example, for a line antenna, the DM mode refers to the line DM mode). Figure 8The current and electric field shown in (b) therein can be respectively referred to as the current and electric field of the line DM mode. It should be understood that based on the fact that the current shows a co-directional distribution on both sides of the connection between the radiator and the feeder line 52, Figure 8 This antenna mode shown in (b) therein can also be referred to as the half-antenna mode, or the half-wavelength mode, or simply the half mode for short.

[0223] In one embodiment, in the line DM mode, or the half mode, the current is stronger at the middle position 51 of the antenna 50 (the current maximum point is near the middle position 51 of the antenna 50), and weaker at both ends of the antenna 50, as Figure 8 shown in (b) therein. The electric field is weaker at the middle position 51 of the antenna 50 and stronger at both ends of the linear antenna 50.

[0224] It should be understood that for the antenna radiator, it can be understood as a metal structural member that generates radiation, and the number thereof can be one piece, as Figure 7 shown, or it can also be two pieces, as Figure 8 shown, and can be adjusted according to actual design or production needs. For example, for the line CM mode, two radiators can also be used as Figure 8 shown. The two ends of the two radiators are arranged oppositely and spaced by a gap, and a symmetric feeding method is adopted at the mutually approaching ends. For example, the same feed source signal is respectively fed into the mutually approaching ends of the two radiators, and an effect similar to that of the antenna structure shown in Figure 7 can also be obtained. Correspondingly, for the line DM mode, one radiator can also be used as Figure 7 shown. Two feeding points are arranged at the middle position of the radiator and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are respectively fed into the two symmetric feeding points on the radiator, and an effect similar to that of the antenna structure shown in Figure 8 can also be obtained.

[0225] 3. Line CM-DM mode

[0226] The above Figure 7 and Figure 8 respectively show that when both ends of the radiator are open, different feeding methods are used to generate the line CM mode and the line DM mode respectively.

[0227] When the feeding form of the antenna adopts asymmetric feeding (the feeding point deviates from the middle position of the radiator, including edge feeding or off-center feeding), or the grounding point of the radiator (the coupling point with the floor) is asymmetric (the grounding point deviates from the middle position of the radiator), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the line CM mode and the line DM mode respectively. For example, the first resonance corresponds to the line CM mode, and the current and electric field distributions are as Figure 7 shown in (b) therein. The second resonance corresponds to the line DM mode, and the current and electric field distributions are asFigure 8 as shown in (b) of

[0228] Figure 9 is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0229] It should be understood that for the sake of brevity of discussion, only the electronic device 100 is taken as a foldable electronic device, and only the first housing 201 and the second housing 202 are taken as examples for illustration. The first housing 201 and the second housing 202 can be rotatably connected to the rotating shaft 203.

[0230] As Figure 9 shown, the first housing 201 includes a first frame 210. The second housing 202 includes a second frame 220.

[0231] The electronic device 100 includes an antenna 301 and an antenna 302. The antenna 301 includes a radiator 310. The antenna 302 includes a radiator 320. Both the antenna 301 and the antenna 302 include parasitic branches 311.

[0232] The radiator 310 is a conductive part of the first frame 210 between the first position 211 and the second position 212. The parasitic branch 311 is a conductive part of the first frame 210 between the second position 212 and the third position 213. The radiator 320 is a conductive part of the second frame 220 between the fourth position 214 and the fifth position 215.

[0233] When the electronic device 100 is in a folded state, the parasitic branch 311 and the radiator 320 at least partially overlap in the first direction, as Figure 10 shown. Wherein, the first direction is the thickness direction of the electronic device 100, or it can also be the direction perpendicular to the display screen when the electronic device 100 is in an unfolded state (for example, the x direction).

[0234] It should be understood that when the electronic device 100 is in a folded state and the parasitic branch 311 is not provided (the first frame 210 is coupled to the floor 300 at the second position 212 and the third position 213), due to a certain distance between the radiator 310 and the radiator 320, the coupling between the radiator 310 and the radiator 320 is weak, and the isolation between the antenna 301 and the antenna 302 is good.

[0235] In order to improve the radiation characteristics (e.g., bandwidth, efficiency, etc.) of antenna 301 and antenna 302, parasitic stubs 311 are provided near radiator 310 and radiator 320. However, when the electronic device 100 is in the folded state, both radiator 310 and radiator 320 can cause the parasitic stubs 311 to couple to generate currents in the same direction (the currents between the second position 212 and the third position 213 are in the same direction). Since both radiator 310 and radiator 320 can generate this current in the same direction, the coupling between radiator 310 and radiator 320 is enhanced, and the isolation between antenna 301 and antenna 302 deteriorates.

[0236] An embodiment of the present application provides an electronic device, which includes a first antenna and a second antenna. The first antenna uses the conductive part of the frame of the first housing as the first radiator. The second antenna uses the conductive part of the frame of the second housing as the second radiator. Both the first antenna and the second antenna can improve the antenna radiation characteristics through parasitic stubs. When the electronic device is in the folded state, there is good isolation between the first antenna and the second antenna, and the first antenna and the second antenna can work simultaneously to improve the communication performance of the electronic device.

[0237] Figure 11 It is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0238] It should be understood that the electronic device 100 described in the embodiments of the present application is only a schematic diagram, and only shows the structure of the area related to the embodiments of the present application. In actual production or design, other areas can be adjusted. For example, the frame (e.g., the first frame or the second frame) may have multiple insulating gaps or be coupled to the ground at multiple points to form radiators or parasitic stubs of other antennas, and the embodiments of the present application do not limit this.

[0239] As Figure 11 shown, the electronic device 100 may include a first housing 201, a second housing 202, a first rotating shaft 203, and a ground 300.

[0240] Among them, the first housing 201 includes a first frame 210, and at least a part of the first frame 210 is spaced apart from the ground 300. The second housing 202 includes a second frame 220, and at least a part of the second frame 220 is spaced apart from the ground 300.

[0241] The first rotating shaft 203 is located between the first housing 201 and the second housing 202, and the first rotating shaft 203 is rotatably connected to the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In one embodiment, the floor 300 may include a first part and a second part. The first part may be located within the first housing 201, and the second part may be located within the second housing 202. The first part and the second part may be connected by the first rotating shaft 203.

[0242] It should be understood that in Figure 11 the electronic device 100 shown, the electronic device 100 is a foldable electronic device. The first rotating shaft 203 is directly connected to the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In addition, "the first rotating shaft 203 is rotatably connected to the first housing 201 and the second housing 202 respectively" includes the situation where the first rotating shaft 203 can be rotatably connected to the first or second housing through one or more second rotating shafts and one or more intermediate housings. For example, in one embodiment, the electronic device 100 may further include a first rotating shaft and a second rotating shaft, and one or more intermediate housings located between the first rotating shaft and the second rotating shaft. The first rotating shaft is located between the first housing 201 and the intermediate housing, and the first rotating shaft is rotatably connected to the first housing 201 and the intermediate housing respectively, so that the first housing 201 and the intermediate housing can rotate relative to each other. The second rotating shaft is located between the intermediate housing and the second housing 202, and the first rotating shaft 203 is rotatably connected to the intermediate housing and the second housing 202 respectively, so that the intermediate housing and the second housing 202 can rotate relative to each other.

[0243] The first frame 210 includes a first position 211, a second position 212, and a third position 213 arranged in sequence. The first frame 210 defines a first insulating gap and a second insulating gap at the second position 212 and the third position 213 respectively. The first frame 210 is coupled to the floor 300 or has an insulating gap at the first position 211.

[0244] The second frame 220 includes a fourth position 214 and a fifth position 215. The second frame 220 has a third insulating gap with the floor 300 at the fourth position 214. The second frame 220 is coupled to the floor 300 or has an insulating gap at the fifth position 215. The electronic device 100 includes a first antenna 401 and a second antenna 402.

[0245] The first antenna 401 includes a first radiator 410 and a first feeding circuit 411. The first radiator 410 includes a conductive portion of the first frame 210 between a first position 211 and a second position 212. At least a portion of the first radiator 410 is spaced apart from the floor 300. The first radiator 410 includes a first feeding point 412. The first feeding circuit 411 is coupled to the first feeding point 412 to feed a radio frequency signal in the first frequency band.

[0246] The second antenna 402 includes a second radiator 420 and a second feeding circuit 421. The second radiator 420 includes a conductive portion of the second frame 220 between a fourth position 214 and a fifth position 215. At least a portion of the second radiator 420 is spaced apart from the floor 300. The second radiator 420 includes a second feeding point 422. The second feeding circuit 421 is coupled to the second feeding point 422 to feed a radio frequency signal in the second frequency band.

[0247] In one embodiment, when the electronic device 100 is in the folded state, the distance between the second position 212 and the fourth position 214 is less than the distance between the second position 212 and the fifth position 215.

[0248] It should be understood that the open end of the second radiator 420 can be arranged close to the first radiator 410. The open ends of the first radiator 410 and the second radiator 420 are close to each other, and there is a strong electric field in the vicinity of the open ends, and there is a strong coupling between the first antenna 401 and the second antenna 402.

[0249] In one embodiment, the first radiator 410 is configured to generate a first resonance, and the resonance frequency band of the first resonance includes the above-mentioned first frequency band. The second radiator 420 is configured to generate a second resonance, and the resonance frequency band of the second resonance includes the above-mentioned second frequency band. In one embodiment, the resonance point frequency of the first resonance is less than or equal to the resonance point frequency of the second resonance.

[0250] The electronic device 100 further includes a parasitic stub 430 and a first element 441.

[0251] The parasitic stub 430 includes a conductive portion of the first frame 210 between the second position 212 and the third position 213. At least a portion of the parasitic stub 430 is spaced apart from the floor 300.

[0252] When the electronic device 100 is in the folded state, the parasitic stub 430 and the second radiator 420 at least partially overlap in a first direction, as Figure 12 shown. Wherein, the first direction is the thickness direction of the electronic device 100, or when the electronic device 100 is in the unfolded state, the first direction is the direction perpendicular to the display screen, for example, the x direction.

[0253] In one embodiment, when the electronic device 100 is in a folded state, the first radiator 410 and the second radiator 420 are arranged offset in a first direction. The first radiator 410 and the second radiator 420 do not overlap in the first direction.

[0254] In one embodiment, the first position 211, the second position 212, and the third position 213 may be located on a first side of the first frame 210. In one embodiment, the fourth position 214 and the fifth position 215 may be located on a second side of the second frame 220.

[0255] In one embodiment, when the electronic device 100 is in an unfolded state, the first side and the second side are the same side of the electronic device 100. For the sake of brevity of discussion, only the example where the first side and the second side are the top side (or the bottom side) of the electronic device 100 is used for illustration. Among them, the top side / bottom side of the electronic device 100 can be understood as the top / bottom side in the unfolded state. For example, in a mobile phone, it can be understood as the top / bottom side under the desktop or the graphical user interface (GUI).

[0256] The parasitic stub 430 includes a first connection point 431, and the first connection point 431 is located between the second position 212 and the third position 213. The first element 441 is coupled between the first connection point 431 and the ground 300. In one embodiment, the first element 441 is inductive.

[0257] The center frequency of the first frequency band is less than the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz. In one embodiment, the center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band.

[0258] In one embodiment, the operating frequency bands of the first antenna 401 and the second antenna 402 are adjacent (the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz).

[0259] For example, the operating frequency band (the first frequency band) of the first antenna 401 includes L1 (1578.42 ± 1.023 MHz) in the global positioning system (GPS), and the operating frequency band (the second frequency band) of the second antenna 402 includes B3 (1.71 GHz - 1.785 GHz) in LTE. Or, for example, the operating frequency band (the first frequency band) of the first antenna 401 includes the 2.4G frequency band (2.4 GHz - 2.4835 GHz) in the wireless network communication technology (Wi-Fi) or Bluetooth wireless technology (BT) (2.4 GHz - 2.4835 GHz), and the operating frequency band (the second frequency band) of the second antenna 402 includes B7 (2.5 GHz - 2.57 GHz) or B41 (2.496 GHz - 2.69 GHz) in LTE.

[0260] It should be understood that in the above embodiments, only some communication frequency bands that the first frequency band and the second frequency band may include are used as examples. In actual production or design, other communication frequency bands may also be included, and the embodiments of the present application do not limit this.

[0261] According to the embodiments of the present application, when the first feeding point 412 feeds a radio frequency signal in the folded state of the electronic device 100, the first antenna 401 can couple to generate a first current path on the parasitic stub 430. In the first current path, there is a current in the same direction on the parasitic stub 430 between the second position 212 and the third position 213.

[0262] In the first frequency band, since a first element 441 is coupled between the first connection point 431 of the parasitic stub 430 and the ground plane 300, an additional second current path can be generated on the parasitic stub 430. In the second current path, the currents on the parasitic stub 430 on both sides of the first connection point 431 are in opposite directions.

[0263] Therefore, there is partial reverse between the current on the first current path and the current on the second path, and the current on the second path can cancel part of the current on the first path, thereby weakening the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0264] Moreover, since the first element 441 is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. The inductive element has the characteristics of a low-pass and high-impedance. The additional current path generated by the second antenna 402 (the second feeding point 422 feeds a radio frequency signal) on the parasitic stub 430 is weak and will not have a great impact on the original current path. The parasitic stub 430 can be used to improve the radiation characteristics (such as radiation efficiency) of the second antenna 402.

[0265] In one embodiment, the parasitic stub 430 and the first element 441 can be used to generate a first parasitic resonance and a second parasitic resonance. The resonance point frequency of the first parasitic resonance is greater than that of the second resonance, and the resonance point frequency of the second parasitic resonance is less than that of the first resonance.

[0266] Correspondingly, when the boundary conditions of the parasitic stub 430 and the second radiator 420 are the same (both ends are open ends, or one end is an open end and the other end is a grounded end), the electrical length of the parasitic stub 430 is less than that of the second radiator 420.

[0267] It should be understood that the first current path coupled by the first antenna 401 on the parasitic stub 430 and the current path coupled by the second antenna 402 on the parasitic stub 430 in the above embodiment can correspond to the first parasitic resonance. The second current path coupled by the first antenna 401 on the parasitic stub 430 in the above embodiment can correspond to the second parasitic resonance.

[0268] In one embodiment, the first parasitic resonance can be used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402 in the second frequency band. In one embodiment, the second parasitic resonance can be used to improve the isolation between the first antenna 401 and the second antenna 402 in the first frequency band.

[0269] It should be understood that at the resonance point of the first parasitic resonance, in the first current path coupled by the first antenna 401 on the parasitic stub 430 and the current path coupled by the second antenna 402 on the parasitic stub 430, the currents on the parasitic stub 430 are in the same direction, and this co-directional current can be used to improve the radiation characteristics (e.g., radiation efficiency) of the antenna.

[0270] At the resonance point of the second parasitic resonance, in the second current path coupled by the first antenna 401 on the parasitic stub 430, the current on the parasitic stub 430 includes some reverse currents, and the current on the second current path can cancel part of the current on the first current path, thereby weakening the overall current coupled by the first antenna 401 on the parasitic stub 430 (since the overall current is weakened, the first parasitic resonance has a relatively small improvement in the radiation characteristics of the first antenna 401), and further weakening the coupling between the first radiator 410 and the second radiator 420, and improving the isolation between the first antenna 401 and the second antenna 402.

[0271] Therefore, in Figure 11 In the electronic device 100 shown, the parasitic stub 430 is mainly used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402.

[0272] In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is less than or equal to 800 MHz.

[0273] It should be understood that compared with the resonance point of the first resonance, the resonance point of the second parasitic resonance is closer to the low frequency. When the frequency between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is within a certain range, the cancellation effect of the current on the second current path and the current on the first current path is better, and the isolation between the first antenna 401 and the second antenna 402 is better. And it will not cause a pit in the radiation efficiency of the first antenna 401 in the first frequency band due to the second parasitic resonance being close to the first resonance, reducing the radiation characteristics of the first antenna 401 in the first frequency band.

[0274] In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0275] It should be understood that when the frequency between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is within a certain range, it will not cause a pit in the radiation efficiency of the second antenna 402 in the second frequency band due to the first parasitic resonance being close to the second resonance, and the second antenna 402 can have better radiation characteristics (such as radiation efficiency) in the second frequency band.

[0276] In one embodiment, the length L1 of the first frame 210 between the first position 211 and the second position 212 and the length L2 of the first frame between the second position 212 and the third position 213 satisfy: L1 × 150% ≤ L2.

[0277] It should be understood that as the length of the parasitic stub 430 increases, it is more beneficial to improve the radiation characteristics of the antenna (the first antenna 401 or the second antenna 402).

[0278] In one embodiment, the first connection point 431 is disposed on a side of the parasitic stub 430 away from the first radiator 410. The distance between the first connection point 431 and the second position 212 (the length of the parasitic stub 430 between the first connection point 431 and the second position 212) is greater than the distance between the first connection point 431 and the third position 213 (the length of the parasitic stub 430 between the first connection point 431 and the second position 212).

[0279] It should be understood that when the first connection point 431 is disposed on the side of the parasitic stub 430 away from the first radiator 410, the current for reverse cancellation between the current on the first current path and the current on the second path can be increased, further reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0280] In one embodiment, the first connection point 431 may be located in the first current large point region of the parasitic stub 430 between the second position 212 and the third position 213. Wherein, the first current large point region is generated by the coupling of the second antenna 402.

[0281] It should be understood that the above-mentioned first current large point region being generated by the coupling of the second antenna 402 can be understood as the region where the current large point is located in the current path coupled by the second antenna 402 on the parasitic stub 430. Since current corresponds to electric field, the above-mentioned current large point can also be understood as the electric field zero point (the electric fields on both sides of the electric field zero point are in opposite directions). In the embodiments of the present application, the current large point region can be understood as the region within 5 mm from the current maximum point, or the region within 5 mm from the electric field zero point.

[0282] When the first connection point 431 is located in the first current large point region, the influence of the first element 441 on the second antenna 402 is smaller, and the parasitic stub 430 can have a greater improvement on the radiation characteristics of the second antenna 402.

[0283] In one embodiment, the equivalent inductance value of the first element 441 can be determined according to the frequency of the actual first frequency band. In one embodiment, when the center frequency of the first frequency band is less than or equal to 2 GHz, the equivalent inductance value of the first element 441 is greater than or equal to 2 nH. When the center frequency of the first frequency band is greater than 2 GHz, the equivalent inductance value of the first element 441 is greater than or equal to 1 nH.

[0284] In one embodiment, the first element 441 may be a 0 ohm resistor.

[0285] In one embodiment, the electronic device 100 further includes a second element 442. The parasitic stub 430 includes a second connection point 432. The second element 442 is coupled between the second connection point 432 and the ground plane 300. In one embodiment, the second element 442 is capacitive.

[0286] According to the embodiments of the present application, a part of the current in the current path generated by the second antenna 402 will flow into the ground plane 300 at the second connection point 432, further reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0287] Meanwhile, since the second element 442 is capacitive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. A capacitive element has the characteristics of high-pass and low-resistance. On the parasitic stub 430, the current path generated by the first antenna 401 is not affected near the second connection point 432, and the parasitic stub 430 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401.

[0288] In one embodiment, the first connection point 431 and the second connection point 432 are respectively located on both sides of the center of the parasitic stub between the second position 212 and the third position 213, and the distance between the center and the second position 212 (the length of the parasitic stub 430 between the center and the second position 212) is the same as the distance between the center and the third position 213 (the length of the parasitic stub 430 between the center and the third position 213).

[0289] In one embodiment, one side of the parasitic stub 430 away from the first radiator 410 includes the above-mentioned first connection point 431. One side of the parasitic stub 430 close to the first radiator 410 includes the above-mentioned second connection point 432. In one embodiment, the distance between the second connection point 432 and the second position 212 (the length of the parasitic stub 430 between the second connection point 432 and the second position 212) is less than the distance between the second connection point 432 and the third position 213 (the length of the parasitic stub 430 between the second connection point 432 and the third position 213).

[0290] In one embodiment, the second connection point 432 may be located in the second current maximum region of the parasitic stub 430 between the second position 212 and the third position 213. Among them, the second current maximum region is generated by the coupling of the first antenna 401.

[0291] It should be understood that the above-mentioned second current maximum region generated by the first antenna 401 can be understood as the region where the current is maximum in the current path generated by the first antenna 401 through coupling on the parasitic stub 430.

[0292] When the second connection point 432 is located in the second current maximum region, the influence of the second element 442 on the first antenna 401 is smaller, and the parasitic stub 430 can improve the radiation characteristics of the first antenna 401 more significantly.

[0293] In one embodiment, the equivalent capacitance value of the second element 442 can be determined according to the actual frequency of the second frequency band. In one embodiment, when the center frequency of the second frequency band is less than or equal to 2 GHz, the equivalent inductance value of the second element 442 is less than or equal to 3 pF. When the center frequency of the second frequency band is greater than 2 GHz, the equivalent inductance value of the second element 442 is greater than or equal to 2 pF.

[0294] In one embodiment, the first frame 210 is coupled to the floor 300 at the first position 211.

[0295] It should be understood that one end of the first radiator 410 is a ground end and the other end is an open end, which can form a structure similar to an IFA or a structure similar to a left-handed antenna. The left-handed antenna can, for example, conform to an antenna with a composite right and left hand (CRLH) transmission line structure.

[0296] When the first radiator 410 forms a structure similar to an inverted F-shaped antenna, the first feeding point 412 is close to the ground end, and the distance between the first feeding point 412 and the ground end (the length of the first radiator 410 between the first feeding point 412 and the first position 211) is less than or equal to one-half of the length of the first radiator 410.

[0297] When the first radiator 410 forms a structure similar to a left-handed antenna, the first feeding point 412 is close to the open end, and the distance between the first feeding point 412 and the ground end (the length of the first radiator 410 between the first feeding point 412 and the first position 211) is greater than or equal to one-half of the length of the first radiator 410. When the first feeding point 412 is close to the open end, it is beneficial to realize the miniaturization of the first radiator 410. The first feeding circuit 411 is coupled to the first feeding point 412 by a capacitor to better excite the first radiator 410.

[0298] For the sake of simplicity of discussion, when forming a structure similar to an inverted F-shaped antenna or a structure similar to a left-handed antenna, it can be correspondingly understood in the embodiments of the application and will not be elaborated one by one.

[0299] In one embodiment, the first resonance generated by the first radiator 410 can correspond to a quarter-wavelength mode. The electrical length of the first radiator 410 is approximately one-quarter of the first wavelength.

[0300] Wherein, the first wavelength can be understood as the vacuum wavelength corresponding to the resonance point frequency of the first resonance generated by the first radiator 410, or it can also be understood as the vacuum wavelength corresponding to the center frequency of the resonance frequency band formed by the first resonance generated by the first radiator 410.

[0301] It should be understood that the above wavelengths are all vacuum wavelengths. Since there is a certain conversion relationship between the medium wavelength and the vacuum wavelength, the above vacuum wavelengths can also be converted into medium wavelengths. For the sake of simplicity of discussion, the wavelengths described in the embodiments of the present application can be correspondingly understood.

[0302] In one embodiment, the first frame 210 has an insulating gap at the first position 211, as Figure 13 shown.

[0303] It should be understood that both ends of the first radiator 410 are open ends, forming a dipole-like antenna structure.

[0304] In one embodiment, the first resonance generated by the first radiator 410 may correspond to a half-wavelength mode. The electrical length of the first radiator 410 is approximately half of the first wavelength.

[0305] In one embodiment, the second frame 220 has a fourth insulating gap at the fifth position 215, as Figure 12 shown.

[0306] It should be understood that both ends of the second radiator 420 are open ends, forming a dipole-like antenna structure.

[0307] In one embodiment, the second resonance generated by the second radiator 420 may correspond to a half-wavelength mode. The electrical length of the second radiator 420 is approximately half of the second wavelength. Herein, the second wavelength can be understood as the wavelength corresponding to the second resonance generated by the second radiator 410.

[0308] In one embodiment, when the electronic device 100 is in a folded state, the first insulating gap is aligned with the third insulating gap, and / or the second insulating gap is aligned with the fourth insulating gap.

[0309] It should be understood that the above alignment can be understood as that when the electronic device 100 is in a folded state, it at least partially overlaps along the direction perpendicular to the thickness direction of the electronic device 100 (for example, when in an unfolded state, the direction perpendicular to the display screen). In one embodiment, the second radiator 420 (the second radiator 420 between the fourth position 214 and the fifth position 215) may further include a grounding point, and the second radiator 420 (the second frame 220) is coupled and connected to the floor 300 at the grounding point.

[0310] It should be understood that when no grounding point is provided between the fourth position 214 and the fifth position 215, the second resonance of the second radiator 420 can be generated by the line DM mode in the above embodiment. When a grounding point is provided between the fourth position 214 and the fifth position 215, the second radiator 420 can generate a third resonance by the line CM mode in the above embodiment.

[0311] In one embodiment, the distance between the grounding point and the fourth position 214 (the length of the second frame 220 between the grounding point and the fourth position 214) is different from the distance between the grounding point and the fifth position 215 (the length of the second frame 220 between the grounding point and the fifth position 215).

[0312] It should be understood that when the grounding point is not located at the center of the second radiator 420, the third resonance generated by the second radiator 420 in the line CM mode can also couple to generate a current in the same direction on the parasitic stub 430, which is used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402.

[0313] In one embodiment, the second frame 220 is coupled to the floor 300 at the fifth position 215, as Figure 13 shown.

[0314] It should be understood that one end of the second radiator 420 is a grounded end and the other end is an open end, which can form a structure similar to an IFA or a structure similar to a left-handed antenna.

[0315] In one embodiment, the first resonance generated by the second radiator 420 can correspond to a quarter-wavelength mode. The electrical length of the second radiator 420 is approximately one quarter of the first wavelength.

[0316] In one embodiment, both ends of the parasitic stub 430 are open ends, forming an antenna structure similar to a dipole. The parasitic stub 430 operates in a half-wavelength mode. The parasitic stub 430 can generate parasitic resonance by the line DM mode in the above embodiment.

[0317] It should be understood that in the embodiments of the present application, when the first connection point 431 and / or the second connection point 432 is located between the second position 212 and the third position 213, only the first frame 210 needs to have a first insulating gap and a second insulating gap at the second position 212 and the third position 213. The embodiments of the present application do not limit the structure formed by the first radiator 410, the second radiator 420, and the parasitic stub 430. For example, the first frame 210 has an insulating gap at the first position 211 or the fourth position 214, and the structure formed by the first radiator 410, the second radiator 420, and the parasitic stub 430 can be determined according to actual production or design.

[0318] In one embodiment, the parasitic stub 430 (the parasitic stub 430 between the second position 212 and the third position 213) does not include a grounding point.

[0319] It should be understood that when the parasitic stub 430 includes a grounding point, the current distribution on the parasitic stub 430 will change. The first antenna 401 and the second antenna 402 can also couple to generate a reverse current on the parasitic stub 430, making it difficult to improve the radiation characteristics (e.g., radiation efficiency) of the antenna through the parasitic stub 430.

[0320] In one embodiment, the second frame 220 may further include a sixth position 216, and the fifth position 215 is located between the sixth position 216 and the fourth position 214, as Figure 14As shown. The second frame 220 has a third insulating gap and a fourth insulating gap at the fourth position 214 and the fifth position 215 respectively. The second frame 220 is coupled to the floor 300 at the sixth position 216.

[0321] In one embodiment, the second radiator 420 includes a conductive portion of the second frame 220 between the fourth position 214 and the sixth position 216, as Figure 14 shown.

[0322] It should be understood that in the above embodiment, the conductive portion of the second frame 220 between the fourth position 214 and the fifth position 215 serves as the second radiator 420. Both ends of the second radiator 420 are open ends, and the second radiator 420 operates in a half-wavelength mode.

[0323] Whereas in Figure 14 the foldable electronic device 100 shown, the second radiator 420 has a structure with one end being a grounded end and the other end being an open end. Moreover, the fourth insulating gap of the second radiator 420 can be regarded as an equivalent capacitance (e.g., distributed capacitance) provided on the second radiator 420, and this equivalent capacitance can enable the second radiator 420 to form a metamaterial structure. The second radiator 420 with this metamaterial structure can increase the radiation aperture, and after having this fourth insulating gap, the electric field is more dispersed. In one embodiment, the dielectric loss near the second radiator 420 forming the metamaterial structure is reduced, so the radiation characteristics (e.g., system efficiency and radiation efficiency) of the second antenna 402 can be effectively improved.

[0324] In one embodiment, the electrical length of the second radiator 420 is greater than three-eighths of the first wavelength.

[0325] It should be understood that the second resonance generated by the second radiator 420 can correspond to a quarter-wavelength mode. Through the fourth insulating gap, the electrical length of the second radiator 420 can be made greater than three-eighths of the first wavelength, and the current on the second radiator 420 is in the same direction (e.g., no reverse occurs). The electrical length of the second radiator 420 increases from a quarter-wavelength of the first wavelength to more than three-eighths of the first wavelength, but still operates in a quarter-wavelength mode.

[0326] In this case, the current density on the second radiator 420 is dispersed, and the electric field density between the second radiator 420 and the floor 300 is weakened, thereby reducing the conductor loss and dielectric loss brought by the second radiator 420 and the conductors and dielectrics arranged around the second radiator 420, and further improving the radiation characteristics of the second antenna 402. The second radiator 420 increases the radiation aperture, effectively improving the system efficiency and radiation efficiency of the second antenna 402.

[0327] Among them, the first wavelength can be understood as the medium wavelength corresponding to the resonance point frequency of the second resonance generated by the second radiator 420, or it can also be understood as the medium wavelength corresponding to the center frequency of the resonance frequency band formed by the second resonance generated by the second radiator 420. Since there is a certain correspondence between the vacuum wavelength and the medium wavelength, therefore, the above ratio can be converted to the vacuum wavelength, which will not be elaborated one by one in this application.

[0328] In one embodiment, the second radiator 420 may further include a third connection point 433 and a fourth connection point 434, and the fourth insulating gap is located between the third connection point 433 and the fourth connection point 434. A third element 443 is coupled between the third connection point 433 and the fourth connection point 434.

[0329] It should be understood that by the third element 443 coupled between the third connection point 433 and the fourth connection point 434, the equivalent capacitance value of the fourth insulating gap can be adjusted, thereby adjusting the radiation characteristics of the second antenna 402 (for example, the resonance point frequency of the second resonance generated by the second radiator 420).

[0330] In one embodiment, the length of the second radiator 420 between the first end (ground end, the end at the sixth position 216) of the second radiator 420 and the fourth insulating gap is less than the length of the second radiator 420 between the second end (open end, the end at the fourth position 214) of the second radiator 420 and the fourth insulating gap.

[0331] It should be understood that the length of the radiator between one end of the second radiator 420 and the fourth insulating gap can be understood as the length of the conductor part between the end of this end and the fourth insulating gap. For the sake of simplicity of discussion, it can be understood accordingly in the embodiments of this application.

[0332] In one embodiment, the length of the second radiator 420 between the first end (ground end, the end at the sixth position 216) of the second radiator 420 and the fourth insulating gap is less than three-fifths of the length of the second radiator 420 between the second end (open end, the end at the fourth position 214) of the second radiator 420 and the fourth insulating gap.

[0333] In one embodiment, the length of the second radiator 420 between the first end (ground end, the end at the sixth position 216) of the second radiator 420 and the fourth insulating gap is less than one-third of the length of the second radiator 420 between the second end (open end, the end at the fourth position 214) of the second radiator 420 and the fourth insulating gap.

[0334] In one embodiment, the length of the second radiator 420 between the first end (ground end, the end at the sixth position 216) and the fourth insulating slot is less than one-seventh of the length of the second radiator 420 between the second end (open end, the end at the fourth position 214) and the fourth insulating slot.

[0335] It should be understood that the above-mentioned fourth insulating slot may be located in a region with a relatively large current of the second radiator 420. The region with a relatively large current should be understood as follows: for the non-slotted second radiator 420 (for example, operating in a quarter-wavelength mode), when the fourth insulating slot is present, the electric field strength of the second radiator 420 becomes weaker, achieving the effect of dispersing the electric field, thereby improving the radiation characteristics of the second antenna 402 (for example, system efficiency and radiation efficiency).

[0336] In one embodiment, the third element 443 may be a capacitor or an element equivalent to a capacitor, such as a distributed capacitor.

[0337] In one embodiment, the equivalent capacitance value of the third element 443 may be less than or equal to a first threshold. The first threshold may be designed according to the resonant point frequency of the second resonance generated by the second radiator 420 (or the center frequency of the second frequency band). When the resonant point frequency of the second resonance is less than or equal to 1 GHz, the first threshold is 10 pF. When the resonant point frequency of the second resonance is greater than 1 GHz, the first threshold is 2 pF.

[0338] In one embodiment, the third element 443 may be an inductor or an element equivalent to an inductor.

[0339] In one embodiment, the equivalent inductance value of the third element 443 may be less than or equal to 5 nH.

[0340] It should be understood that by designing the equivalent capacitance value or equivalent inductance value of the third element 443 according to the resonant point frequency of different resonances, the current distribution on the second radiator 420 can be made more dispersed, reducing conductor losses and increasing the radiation aperture of the second radiator 420, thereby improving the radiation characteristics of the second antenna 402 (for example, system efficiency and radiation efficiency).

[0341] In one embodiment, the distance between the third connection point 433 and / or the fourth connection point 434 and the fourth insulating slot is less than or equal to 5 mm.

[0342] Among them, the distance between the third connection point 433 and / or the fourth connection point 434 and the fourth insulation gap can be understood as the minimum distance between the third connection point 433 and / or the fourth connection point 434 and the conductors on both sides of the fourth insulation gap (the length of the second radiator 420 between the third connection point 433 and / or the fourth connection point 434 and the fourth insulation gap). When electrically connected to the third connection point 433 and / or the fourth connection point 434 through a connecting member (for example, a metal shrapnel), the distance from the fourth insulation gap can be understood as the minimum distance between the center of the part of the connecting member in contact with the connection point and the conductors on both sides of the fourth insulation gap.

[0343] In one embodiment, the third element 443 can be a distributed capacitor, such as Figure 15 shown.

[0344] In one embodiment, the second antenna 402 includes a distributed connecting member 4431. The distributed connecting member 4431 and the second frame 220 together form the above-mentioned third element 443, such as Figure 15 shown. The first end of the distributed connecting member 4431 is connected to the third connection point 433, and the second end extends toward the fourth connection point 434 and is opposite to and non-contact with the fourth connection point 434 (the second radiator 420 between the fifth position 215 and the sixth position 216).

[0345] It should be understood that when the third element 443 is a distributed device, the structural strength at the fifth position 215 (the fourth insulation gap) can be improved, and the stability of the electronic device 100 can be improved.

[0346] In one embodiment, the second antenna 402 may also include a switch 4432. The switch 4432 is coupled between the distributed connecting member 4431 and the ground plane 300.

[0347] It should be understood that the switch 4432 can be used to switch the equivalent capacitance value or the equivalent inductance value of the element coupled to the distributed connecting member 4431, so as to adjust the equivalent capacitance value or the equivalent inductance value of the third element 443 formed by the distributed connecting member 4431, so that the second antenna 402 has different radiation characteristics.

[0348] It should be understood that in the metamaterial structure formed in the embodiments of the present application, the elements coupled to both sides of the gap opened on the radiator can all adopt the above structure. For the sake of simplicity of discussion, they will not be elaborated one by one.

[0349] In one embodiment, the first frame 210 may further include a seventh position 217, and the third position 213 is located between the second position 212 and the seventh position 217, such as Figure 14As shown. The first frame 210 has a first insulating gap and a second insulating gap at a second position 212 and a third position 213 respectively. The first frame 210 is coupled to the floor 300 at a seventh position 217.

[0350] In one embodiment, the parasitic stub 430 includes a conductive portion of the first frame 210 between the second position 212 and the seventh position 217.

[0351] It should be understood that in the above embodiment, the conductive portion of the first frame 210 between the second position 212 and the third position 213 serves as the parasitic stub 430. Both ends of the parasitic stub 430 are open ends, and the parasitic stub 430 operates in a half-wavelength mode.

[0352] While in Figure 14 In the foldable electronic device 100 shown, the parasitic stub 430 has a structure with one end being a ground end and the other end being an open end. Moreover, the second insulating gap of the parasitic stub 430 can be regarded as an equivalent capacitance (e.g., distributed capacitance) provided on the parasitic stub 430, and this equivalent capacitance can enable the parasitic stub 430 to form a metamaterial structure.

[0353] In one embodiment, the parasitic stub 430 may further include a fifth connection point 435 and a sixth connection point 436, and the second insulating gap is located between the fifth connection point 435 and the sixth connection point 436. A fourth element 444 is coupled between the fifth connection point 435 and the sixth connection point 436.

[0354] It should be understood that the metamaterial structure formed by the parasitic stub 430 is similar to the metamaterial structure formed by the second radiator 420 in the above embodiment. The relevant structural definitions can refer to the definitions of the above metamaterial structure, and will not be elaborated one by one for the sake of brevity of the discussion.

[0355] In one embodiment, the second radiator 420 may further include a seventh connection point. The second antenna 402 further includes a fifth element, and the fifth element is coupled between the seventh connection point and the floor 300.

[0356] The second radiator 420 is electrically connected to the floor 300 through a fifth element at the seventh connection point. When the second radiator 420 generates a second resonance, the current on the second radiator 420 is shunted in the area near the seventh connection point. Since the shunting occurs in the area near the seventh connection point, the current density on the second radiator 420 can be dispersed. In one embodiment, the current distribution of the second radiator is relatively more dispersed, thereby reducing the conductor loss of the second radiator. In one embodiment, the current distribution of the second radiator is relatively more dispersed, which can increase the radiation aperture of the second radiator 420. Since the conductor loss of the second radiator 420 is reduced and the radiation aperture is increased, the radiation characteristics (e.g., system efficiency and radiation efficiency) of the second antenna 402 can be improved.

[0357] In one embodiment, the distance between the seventh connection point and the third connection point 433 and / or the fourth connection point 434 (e.g., the length of the second radiator 420 between the seventh connection point and the third connection point 433 and / or the fourth connection point 434) is greater than or equal to 0 mm and less than or equal to 5 mm.

[0358] It should be understood that when the distance between the seventh connection point and the third connection point 433 and / or the fourth connection point 434 is equal to 0 mm, the seventh connection point coincides with the third connection point 433 and / or the fourth connection point 434.

[0359] In one embodiment, the parasitic stub 430 may also include a sixth element, similar to the fifth element. The connection points can refer to the above embodiments. For the sake of brevity of discussion, they will not be elaborated one by one.

[0360] In one embodiment, the second antenna 402 may further include a first matching circuit 451, as Figure 16 shown. Among them, the first matching circuit 451 is coupled and connected between the first matching point 261 of the second radiator 420 and the floor 300.

[0361] It should be understood that the first matching circuit 451 can be used to adjust the resonant point frequency of the second resonance generated by the second radiator 420.

[0362] In one embodiment, the first matching point 261 is located between the fourth insulating gap (the fifth position 215) and the sixth position 216.

[0363] In one embodiment, the electronic device 100 may further include a second matching circuit 452, as Figure 16 shown. Among them, the second matching circuit 452 is coupled and connected between the second matching point 262 of the parasitic stub 430 and the floor 300.

[0364] It should be understood that the second matching circuit 452 can be used to adjust the resonant point frequency of the parasitic resonance generated by the parasitic stub 430.

[0365] In one embodiment, the second matching point 262 is located between the second insulating gap (the third position 213) and the seventh position 217.

[0366] In one embodiment, a third matching point may also be included on the first radiator 410. A third matching circuit is coupled between the third matching point and the floor 300 for adjusting the resonant point frequency of the first resonance generated by the first radiator 410. For the sake of brevity of discussion, details are not elaborated one by one.

[0367] Figures 17 to 20 is Figure 16 The simulation results of the first antenna and the second antenna in the electronic device 100 shown. Among them, Figure 17 are the simulation results of the S parameters of the first antenna and the second antenna without setting the first element and the second element. Figure 18 are the simulation results of the S parameters of the first antenna and the second antenna when only the first element is set. Figure 19 are the simulation results of the S parameters of the first antenna and the second antenna when the first element and the second element are set. Figure 20 are the simulation results of the radiation efficiency and the system efficiency of the second antenna.

[0368] It should be understood that for the sake of brevity of discussion, in Figures 17 to 20 the shown simulation results, only the first frequency band including the L1 band (1578.42 ± 1.023 MHz) in GPS and the second frequency band including the B3 band (1.71 - 1.785 GHz) in LTE are taken as examples for illustration.

[0369] As Figure 17 shown, the first antenna (S11) generates resonance near 1.55 GHz, which can correspond to the above-mentioned first resonance, and the resonant frequency band of the first resonance includes the L1 band in GPS. The second antenna (S22) generates resonance near 1.75 GHz, which can correspond to the above-mentioned second resonance, and the resonant frequency band of the second resonance includes the B3 band in LTE.

[0370] Both the first antenna and the second antenna generate resonance near 2.25 GHz, which can correspond to the first parasitic resonance generated by the above-mentioned parasitic stub.

[0371] In the S curve, both the first antenna and the second antenna generate the first parasitic resonance near 2.15 GHz. Therefore, both the first antenna and the second antenna can couple to generate co-directional currents on the first parasitic stub, and the isolation between the first antenna and the second antenna is poor.

[0372] In the first frequency band, the isolation (S12) between the first antenna and the second antenna is only about 11.5 dB. In the second frequency band, the isolation (S12) between the first antenna and the second antenna is only about 9 dB.

[0373] As Figure 18 shown, after setting the first element, the first resonance of the first antenna and the second resonance of the second antenna remain unchanged. Due to the parasitic stub loading the first element, the parasitic resonance shifts to around 2.7 GHz. The resonance point frequency of the parasitic resonance can be adjusted by the second matching circuit. For the sake of simplicity of discussion, the embodiments of the present application will not elaborate one by one.

[0374] In addition, a new resonance is generated near 0.75 GHz on the second antenna, which can be understood as the second parasitic resonance generated by the new current path introduced due to the loading of the first element on the parasitic stub.

[0375] In the first frequency band, the isolation (S12) between the first antenna and the second antenna is increased to around 16 dB. In the second frequency band, the isolation (S12) between the first antenna and the second antenna is increased to around 14.5 dB.

[0376] As Figure 19 shown, after setting the first element and the second element, the first resonance of the first antenna and the second resonance of the second antenna remain unchanged.

[0377] Since the first antenna can couple to generate a first current path on the parasitic stub and a second current path that is partially opposite to the current on the first current path. Therefore, the first parasitic resonance generated by the first antenna coupling to the parasitic stub is weak and not obvious in the S curve. The parasitic resonance generated by the second antenna coupling to the parasitic stub is located near 2 GHz. In addition, a new resonance is generated near 0.6 GHz on the first antenna, which can be understood as the second parasitic resonance generated by the second current path introduced due to the loading of the first element on the parasitic stub.

[0378] Moreover, after the parasitic stub loads the second element, a part of the current coupled by the second antenna to the parasitic stub flows to the ground plane, and the isolation between the first antenna and the second antenna is improved. In the first frequency band, the isolation (S12) between the first antenna and the second antenna is increased to around 17.5 dB. In the second frequency band, the isolation (S12) between the first antenna and the second antenna is increased to around 18 dB.

[0379] As Figure 20 shown, compared with not setting the first element and / or the second element, the parasitic stub with the first element and the second element set can improve the radiation efficiency of the second antenna and the system efficiency.

[0380] Figure 21 And Figure 22 is Figure 16 a schematic diagram of the current and electric field distributions of the antenna in the electronic device 100 shown. Among them, Figure 21 is Figure 16 a schematic diagram of the current and electric field distributions of the first antenna at the resonance point (1.57 GHz) of the first resonance in the electronic device 100 shown. Figure 22 is Figure 16 a schematic diagram of the current and electric field distributions of the second antenna at the resonance point (1.74 GHz) of the second resonance in the electronic device 100 shown.

[0381] As Figure 21 shown, when a radio frequency signal is fed into the first feeding point 412, a first current path and a second current path can be generated on the parasitic stub 430. In the second current path, the currents on the parasitic stub 430 on both sides of the first connection point 431 are in opposite directions.

[0382] Therefore, there is partial reverse between the current on the first current path and the current on the second path. The current on the second path can cancel part of the current on the first path, thereby weakening the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0383] As Figure 22 shown, when a radio frequency signal is fed into the second feeding point 422, since the first element 441 is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. The inductive element has the characteristics of low-pass and high-impedance. The additional current path generated by the second antenna 402 on the parasitic stub 430 is weak, and the influence on the original current path is small.

[0384] The first connection point 431 can be located in the region where the current maximum point (electric field zero point) is located in the current path coupled by the second antenna 402 on the parasitic stub 430. The influence of the first element 441 on the second antenna 402 is smaller, and the parasitic stub 430 can improve the radiation characteristics of the second antenna 402 more, as Figure 22 shown.

[0385] The second connection point 432 can be located in the region where the current maximum point (electric field zero point) is located in the current path coupled by the first antenna 401 on the parasitic stub 430. The influence of the second element 442 on the first antenna 401 is smaller, and the parasitic stub 430 can improve the radiation characteristics of the first antenna 401 more, as Figure 21 shown.

[0386] Figure 23 is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0387] AsFigure 23 As shown, the second radiator 420 includes a first connection point 431 located between a fourth position 214 and a fifth position 215.

[0388] It should be understood that Figure 23 the first antenna 401 and the second antenna 402 shown Figures 11 to 16 are different from the first antenna 401 and the second antenna 402 shown only in the position of the first connection point 431.

[0389] In Figures 11 to 16 the first antenna 401 and the second antenna 402 shown, the first connection point 431 is located at a second position 212 and a third position 213. A first element 441 coupled between the first connection point 431 and the ground 300 can cause an additional second current path to be generated on the parasitic stub 430 (corresponding to the second parasitic resonance in the above embodiment). The current on the original first current path and the current on the additional second path are partially opposite, thereby reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0390] However, in Figure 23 the first antenna 401 and the second antenna 402 shown, the first connection point 431 is located between a fourth position 214 and a fifth position 215. When the electronic device 100 is in a folded state, the first antenna 401 can couple to generate a third current path on the second radiator 420 through the parasitic stub 430. Since a first element 441 is coupled between the first connection point 431 of the second radiator 420 and the ground 300, an additional fourth current path can be generated on the second radiator 420. In the fourth current path, the currents on the parasitic stubs 430 on both sides of the first connection point 431 are opposite. The current on the original third current path and the current on the additional fourth path are partially opposite, thereby reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0391] Moreover, since the first element 441 is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. The inductive element has the characteristics of low-pass and high-impedance. When the second antenna 402 operates (a radio frequency signal is fed into the second feeding point 422), the current path generated on the second radiator 420 will not be affected by the first connection point 431 to generate an additional current path.

[0392] It should be understood that in Figure 23Among the first antenna 401 and the second antenna 402 shown, when only the first connection point 431 is set (the second connection point 432 is not set), the second border 220 has a third insulation gap and a fourth insulation gap at the fourth position 214 and the fifth position 215, and the parasitic stub 430 can be in any form. For example, the first border 210 has a first insulation gap at the second position 212 and is coupled to the floor 300 at the third position 213. When the first connection point 431 and the second connection point 432 are set, the first border 210 has a first insulation gap and a second insulation gap at the second position 212 and the third position 213 respectively, and the second border 220 has a third insulation gap and a fourth insulation gap at the fourth position 214 and the fifth position 215.

[0393] In one embodiment, the first radiator 410 is used to generate a first resonance, and the resonance frequency band of the first resonance includes the above-mentioned first frequency band. In one embodiment, the second radiator 420 and the first element 441 are used to generate a second resonance and a third resonance, and the resonance frequency band of the second resonance includes the above-mentioned second frequency band. In one embodiment, the resonance point frequency of the first resonance is less than or equal to the resonance point frequency of the second resonance. The resonance point frequency of the first resonance is greater than the resonance point frequency of the third resonance.

[0394] It should be understood that at the resonance point of the second resonance, the currents on the second radiator 420 are in the same direction. The third resonance can correspond to the fourth current path in the above embodiment. At the resonance point of the third resonance, the currents on the second radiator 420 include partial reverse currents.

[0395] In one embodiment, the third resonance can be used to improve the isolation between the first antenna 401 and the second antenna 402 in the first frequency band.

[0396] It should be understood that at the resonance point of the third resonance, in the fourth current path coupled by the first antenna 401 on the second radiator 420, the currents on the second radiator 420 include partial reverse currents, and the currents on the fourth current path can cancel part of the currents on the third current path, so that the overall current coupled by the first antenna 401 on the second radiator 420 is weakened, and further the coupling between the first radiator 410 and the second radiator 420 is weakened, improving the isolation between the first antenna 401 and the second antenna 402.

[0397] At the same time, since the currents on the second radiator 420 include partial reverse currents, therefore, the radiation characteristics of the second antenna 402 are weakened to a certain extent. Therefore, in Figure 23 In the electronic device 100 shown, the parasitic stub 430 is mainly used to improve the radiation characteristics (such as radiation efficiency) of the first antenna 401.

[0398] In one embodiment, the parasitic stub 430 can be used to generate a first parasitic resonance. The resonance point frequency of the first parasitic resonance is greater than the resonance point frequency of the second resonance.

[0399] In one embodiment, the first parasitic resonance can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401 in the first frequency band.

[0400] In one embodiment, the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz. In one embodiment, the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is less than or equal to 800 MHz.

[0401] It should be understood that, compared with the resonance point of the first resonance, the resonance point of the third resonance is closer to the low frequency. When the frequency between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is within a certain range, the cancellation effect of the current on the fourth current path and the current on the third current path is better, and there is better isolation between the first antenna 401 and the second antenna 402.

[0402] In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0403] It should be understood that when the frequency between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first resonance is within a certain range, the first antenna 401 will not generate a radiation efficiency pit in the first frequency band due to the first parasitic resonance being close to the first resonance, and the first antenna 401 can have better radiation characteristics (e.g., radiation efficiency) in the first frequency band.

[0404] In one embodiment, the first connection point 431 is disposed on the side of the second radiator 420 away from the first radiator 410. The distance between the first connection point 431 and the fourth position 214 (the length of the second radiator 420 between the first connection point 431 and the fourth position 214) is greater than the distance between the first connection point 431 and the fifth position 215 (the length of the second radiator 420 between the first connection point 431 and the fifth position 215).

[0405] It should be understood that when the first connection point 431 is disposed on the side of the second radiator 420 away from the first radiator 410, the radiation characteristics of the second resonance generated by the second radiator 420 are less affected by the first connection point 431, and the second antenna 402 can still have good radiation characteristics in the second frequency band.

[0406] In one embodiment, the second feeding point 422 and the first connection point 431 are respectively located on both sides of the center of the second radiator 420 between the fourth position 214 and the fifth position 215, and the distance between the center and the fourth position 214 (the length of the second radiator 420 between the center and the fourth position 214) is the same as the distance between the center and the fifth position 215 (the length of the second radiator 420 between the center and the fifth position 215).

[0407] In one embodiment, one side of the second radiator 420 away from the first radiator 410 includes the above-mentioned first connection point 431. One side of the second radiator 420 close to the first radiator 410 includes the above-mentioned second feeding point 422. In one embodiment, the distance between the second feeding point 422 and the fourth position 214 (the length of the second radiator 420 between the second feeding point 422 and the fourth position 214) is less than the distance between the second feeding point 422 and the fifth position 215 (the length of the second radiator 420 between the second feeding point 422 and the fifth position 215).

[0408] In one embodiment, the first connection point 431 may be located in the third current maximum point region of the second radiator 420 between the fourth position 214 and the fifth position 215. Among them, the third current maximum point region is generated by the coupling of the second antenna 402.

[0409] It should be understood that the above-mentioned third current maximum point region being generated by the coupling of the second antenna 402 can be understood as the region where the current maximum point is located in the current path when the second antenna 402 generates the second resonance. Since current corresponds to electric field, the above-mentioned current maximum point can also be understood as the electric field zero point (the electric fields on both sides of the electric field zero point are in opposite directions).

[0410] When the first connection point 431 is located in the third current maximum point region, the influence of the first element 441 on the second antenna 402 is smaller, and the second antenna 402 can still have good radiation characteristics in the second frequency band.

[0411] In one embodiment, the second radiator 420 (the second radiator 420 between the fourth position 214 and the fifth position 215) does not include a grounding point.

[0412] It should be understood that when a grounding point is included on the second radiator 420, the current distribution on the second radiator 420 will change, and it is difficult to control the current distribution on the second radiator 420.

[0413] For the sake of simplicity of discussion, Figure 23 the first antenna 401 and the second antenna 402 shown are related to Figures 11 to 16The similar parts of the first antenna 401 and the second antenna 402 shown are not described one by one. For example, the similar parts include: the position and structure of the first radiator 410; the position and structure of the second radiator 420; the position and structure of the parasitic stub 430; the relationship between the first frequency band and the second frequency band; the equivalent inductance of the first element 441; the equivalent capacitance of the second element 442; the position of the second connection point 432; and so on.

[0414] Figures 24 to 27 is Figure 23 the simulation results of the first antenna and the second antenna in the electronic device 100 shown. Among them, Figure 24 is Figure 23 the simulation results of the S parameters of the first antenna in the electronic device 100 shown. Figure 25 is Figure 23 the simulation results of the S parameters of the second antenna in the electronic device 100 shown. Figure 26 is Figure 23 the simulation results of the radiation efficiency and system efficiency of the first antenna in the electronic device 100 shown. Figure 27 is Figure 23 the simulation results of the radiation efficiency and system efficiency of the second antenna in the electronic device 100 shown.

[0415] It should be understood that Figures 24 to 27 in the simulation results shown, the simulation results without setting the parasitic stub, with setting the parasitic stub, and with setting the first element, the second element and the parasitic stub are respectively shown.

[0416] For example Figure 24 as shown, in the above different cases, the first antenna (S11) can resonate near 1.55 GHz, which can correspond to the above first resonance, and the resonance frequency band of the first resonance includes the L1 frequency band in GPS.

[0417] For example Figure 25 as shown, in the above different cases, the second antenna (S22) resonates near 1.8 GHz, which can correspond to the above second resonance, and the resonance frequency band of the second resonance includes the B3 frequency band in LTE.

[0418] In addition, the second antenna generates a new resonance near 0.6 GHz, which can be understood as the third resonance generated by the fourth current path introduced due to the loading of the first element on the parasitic stub.

[0419] Compared with the case without setting the parasitic stub, in the case of setting the parasitic stub, the isolation degree (S12) between the first antenna and the second antenna deteriorates by about 7 dB. When the first element and the second element are added, the isolation degree (S12) between the first antenna and the second antenna is improved by about 12 dB.

[0420] For exampleFigure 26 and Figure 27 As shown, compared with the case where parasitic stubs are not provided, the parasitic stubs can improve the radiation efficiency of the first antenna and the second antenna and the system efficiency to a certain extent.

[0421] Figure 28 FIG. 7 is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0422] It should be understood that in the above embodiments, the first radiator 410 of the first antenna 401 and the second radiator 420 of the second antenna 402 are respectively located in different housings as examples for illustration. In actual production or design, the first radiator 410 of the first antenna 401 and the second radiator 420 of the second antenna 402 are both provided in the same housing. In the Figure 28 electronic device 100 shown in FIG. 12 only includes a single housing, and the first radiator 410 and the second radiator 420 both include part of the frame of the housing.

[0423] As Figure 28 shown, the electronic device 100 includes a first frame 210 and a ground plane 300.

[0424] The first frame 210 includes a first position 211, a second position 212, a third position 213, and a fourth position 214 arranged in sequence. The first frame 210 has a first insulating gap and a second insulating gap at the second position 212 and the third position 213 respectively. The first frame 210 is coupled to the ground plane 300 or has an insulating gap at the first position 211. The first frame 210 is coupled to the ground plane 300 or has an insulating gap at the fourth position 214.

[0425] In one embodiment, the first position 211, the second position 212, the third position 213, and the fourth position 214 may be located on the first side 131 of the first frame 210. In one embodiment, the second position 212 and the third position 213 may be located on the first side 131 of the first frame 210, the first position 211 may be located on the second side 132 of the first frame 210, and the fourth position 214 may be located on the third side 133 of the first frame 210.

[0426] The first side 131 intersects the second side 132 and the third side 133 at an angle respectively.

[0427] It should be understood that the embodiments of the present application do not limit the specific positions of the first position 211, the second position 212, the third position 213, and the fourth position 214, which can be determined according to actual production or design.

[0428] The electronic device 100 includes a first antenna 401 and a second antenna 402.

[0429] The first antenna 401 includes a first radiator 410 and a first feeding circuit 411. The first radiator 410 includes a conductive portion of the first frame 210 between a first position 211 and a second position 212. At least a part of the first radiator 410 is spaced apart from the floor 300. The first radiator 410 includes a first feeding point 412. The first feeding circuit 411 is coupled to the first feeding point 412 to feed a radio frequency signal in the first frequency band.

[0430] The second antenna 402 includes a second radiator 420 and a second feeding circuit 421. The second radiator 420 includes a conductive portion of the first frame 210 between a third position 213 and a fourth position 214. At least a part of the second radiator 420 is spaced apart from the floor 300. The second radiator 420 includes a second feeding point 422. The second feeding circuit 421 is coupled to the second feeding point 422 to feed a radio frequency signal in the second frequency band.

[0431] In one embodiment, the first radiator 410 is configured to generate a first resonance, and the resonance frequency band of the first resonance includes the above-mentioned first frequency band. The second radiator 420 is configured to generate a second resonance, and the resonance frequency band of the second resonance includes the above-mentioned second frequency band. In one embodiment, the resonance point frequency of the first resonance is less than or equal to the resonance point frequency of the second resonance.

[0432] The electronic device 100 further includes a parasitic stub 430 and a first component 441.

[0433] The parasitic stub 430 includes a conductive portion of the first frame 210 between the second position 212 and the third position 213. At least a part of the parasitic stub 430 is spaced apart from the floor 300.

[0434] The parasitic stub 430 includes a first connection point 431 located between the second position 212 and the third position 213. The first component 441 is coupled between the first connection point 431 and the floor 300. In one embodiment, the first component 441 is inductive.

[0435] The center frequency of the first frequency band is less than the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz. In one embodiment, the center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band.

[0436] In one embodiment, the operating frequency bands of the first antenna 401 and the second antenna 402 are adjacent (the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz).

[0437] For example, the operating frequency band (the first frequency band) of the first antenna 401 includes L1 (1578.42 ± 1.023 MHz) in the global positioning system (GPS), and the operating frequency band (the second frequency band) of the second antenna 402 includes B3 (1.71 - 1.785 GHz) in LTE. Or, for example, the operating frequency band (the first frequency band) of the first antenna 401 includes the 2.4G frequency band (2.4 GHz - 2.4835 GHz) or BT (2.4 GHz - 2.4835 GHz) in Wi-Fi, and the operating frequency band (the second frequency band) of the second antenna 402 includes B7 (2.5 GHz - 2.57 GHz) or B41 (2.496 GHz - 2.69 GHz) in LTE.

[0438] It should be understood that in the above embodiments, only some communication frequency bands that the first frequency band and the second frequency band may include are exemplified. In actual production or design, other communication frequency bands may also be included, and the embodiments of the present application do not limit this.

[0439] According to the embodiments of the present application, when a radio frequency signal is fed into the first feeding point 412, the first antenna 401 can couple to generate a first current path on the parasitic stub 430. In the first current path, the current on the parasitic stub 430 between the second position 212 and the third position 213 is in the same direction.

[0440] In the first frequency band, since a first element 441 is coupled between the first connection point 431 of the parasitic stub 430 and the ground plane 300, a second current path can be additionally generated on the parasitic stub 430. In the second current path, the currents on the parasitic stub 430 on both sides of the first connection point 431 are in opposite directions.

[0441] Therefore, the current on the first current path and the current on the second path are partially in opposite directions, and the current on the second path can cancel part of the current on the first path, thereby weakening the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0442] Moreover, since the first element 441 is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. The inductive element has the characteristics of a low-pass and high-impedance. The additional current path generated by the second antenna 402 (the radio frequency signal is fed into the second feeding point 422) on the parasitic stub 430 is weak and will not have a great impact on the original current path. The parasitic stub 430 can be used to improve the radiation characteristics (such as radiation efficiency) of the second antenna 402.

[0443] In one embodiment, the parasitic stub 430 and the first element 441 can be used to generate a first parasitic resonance and a second parasitic resonance. The resonance point frequency of the first parasitic resonance is greater than that of the second resonance, and the resonance point frequency of the second parasitic resonance is less than that of the first resonance.

[0444] Correspondingly, when the boundary conditions of the parasitic stub 430 and the second radiator 420 are the same (both ends are open ends, or one end is an open end and the other end is a grounded end), the electrical length of the parasitic stub 430 is less than that of the second radiator 420.

[0445] It should be understood that the first current path coupled by the first antenna 401 on the parasitic stub 430 and the current path coupled by the second antenna 402 on the parasitic stub 430 in the above embodiment can correspond to the first parasitic resonance. The second current path coupled by the first antenna 401 on the parasitic stub 430 in the above embodiment can correspond to the second parasitic resonance.

[0446] In one embodiment, the first parasitic resonance can be used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402 in the second frequency band. In one embodiment, the second parasitic resonance can be used to improve the isolation between the first antenna 401 and the second antenna 402 in the first frequency band.

[0447] It should be understood that at the resonance point of the first parasitic resonance, in the first current path coupled by the first antenna 401 on the parasitic stub 430 and the current path coupled by the second antenna 402 on the parasitic stub 430, the currents on the parasitic stub 430 are in the same direction, and this co-directional current can be used to improve the radiation characteristics (e.g., radiation efficiency) of the antenna.

[0448] At the resonance point of the second parasitic resonance, in the second current path coupled by the first antenna 401 on the parasitic stub 430, the current on the parasitic stub 430 includes partial reverse currents, and the current on the second current path can cancel part of the current on the first current path, thereby weakening the overall current coupled by the first antenna 401 on the parasitic stub 430 (since the overall current is weakened, the improvement of the radiation characteristics of the first parasitic resonance on the first antenna 301 is small), and further weakening the coupling between the first radiator 410 and the second radiator 420, improving the isolation between the first antenna 401 and the second antenna 402.

[0449] Therefore, in Figure 11 the electronic device 100 shown, the parasitic stub 430 is mainly used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402.

[0450] In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz. In one embodiment, the frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is less than or equal to 800 MHz.

[0451] It should be understood that, compared with the resonance point of the first resonance, the resonance point of the second parasitic resonance is closer to the low frequency. When the frequency between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is within a certain range, the cancellation effect of the current on the second current path and the current on the first current path is better, and the isolation between the first antenna 401 and the second antenna 402 is better. Moreover, it will not cause a radiation efficiency pit in the first frequency band of the first antenna 401 due to the second parasitic resonance being close to the first resonance, reducing the radiation characteristics of the first antenna 401 in the first frequency band.

[0452] In one embodiment, the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0453] It should be understood that when the frequency between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is within a certain range, it will not cause a radiation efficiency pit in the second frequency band of the second antenna 402 due to the first parasitic resonance being close to the second resonance, and the second antenna 402 can have better radiation characteristics (such as radiation efficiency) in the second frequency band.

[0454] In one embodiment, the length L1 of the first side frame 210 between the first position 211 and the second position 212 and the length L2 of the first side frame between the second position 212 and the third position 213 satisfy: L1×150% ≤ L2.

[0455] It should be understood that as the length of the parasitic stub 430 increases, it is more beneficial to improve the radiation characteristics of the antenna (the first antenna 401 or the second antenna 402).

[0456] In one embodiment, the first connection point 431 is disposed on the side of the parasitic stub 430 away from the first radiator 410. The distance between the first connection point 431 and the second position 212 (the length of the parasitic stub 430 between the first connection point 431 and the second position 212) is greater than the distance between the first connection point 431 and the third position 213 (the length of the parasitic stub 430 between the first connection point 431 and the third position 213).

[0457] It should be understood that when the first connection point 431 is disposed on the side of the parasitic stub 430 away from the first radiator 410, the reverse current between the current in the first current path and the current in the second path can be increased, further reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0458] In one embodiment, the first connection point 431 may be located in the first current maximum region of the parasitic stub 430 between the second position 212 and the third position 213. The first current maximum region is generated by the coupling of the second antenna 402.

[0459] It should be understood that the first current maximum region being generated by the coupling of the second antenna 402 can be understood as the region where the current maximum is located in the current path coupled by the second antenna 402 on the parasitic stub 430. Since current corresponds to electric field, the above current maximum can also be understood as the electric field zero point (the electric fields on both sides of the electric field zero point are in opposite directions). In the embodiments of the present application, the current maximum region can be understood as the region within 5 mm from the electric field zero point.

[0460] When the first connection point 431 is located in the first current maximum region, the influence of the first element 441 on the second antenna 402 is smaller, and the parasitic stub 430 can improve the radiation characteristics of the second antenna 402 to a greater extent.

[0461] In one embodiment, the equivalent inductance value of the first element 441 can be determined according to the frequency of the actual first frequency band. In one embodiment, when the center frequency of the first frequency band is less than or equal to 2 GHz, the equivalent inductance value of the first element 441 is greater than or equal to 2 nH. When the center frequency of the first frequency band is greater than 2 GHz, the equivalent inductance value of the first element 441 is greater than or equal to 10 nH.

[0462] In one embodiment, the electronic device 100 further includes a second element 442. The parasitic stub 430 includes a second connection point 432. The second element 442 is coupled between the second connection point 432 and the ground plane 300. In one embodiment, the second element 442 is capacitive.

[0463] According to the embodiments of the present application, a part of the current in the current path generated by the second antenna 402 will flow into the ground plane 300 at the second connection point 432, further reducing the coupling between the first radiator 410 and the second radiator 420 and improving the isolation between the first antenna 401 and the second antenna 402.

[0464] Meanwhile, since the second element 442 is capacitive, the operating frequency band of the first antenna 401 is lower than that of the second antenna 402. The capacitive element has the characteristics of high-pass and low-resistance. On the parasitic stub 430, the current path generated by the first antenna 401 is not affected near the second connection point 432, and the parasitic stub 430 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401.

[0465] In one embodiment, the first connection point 431 and the second connection point 432 are respectively located on both sides of the center of the parasitic stub between the second position 212 and the third position 213, and the distance between the center and the second position 212 (the length of the parasitic stub 430 between the center and the second position 212) is the same as the distance between the center and the third position 213 (the length of the parasitic stub 430 between the center and the third position 213).

[0466] In one embodiment, one side of the parasitic stub 430 away from the first radiator 410 includes the above-mentioned first connection point 431. One side of the parasitic stub 430 close to the first radiator 410 includes the above-mentioned second connection point 432. In one embodiment, the distance between the second connection point 432 and the second position 212 (the length of the parasitic stub 430 between the second connection point 432 and the second position 212) is less than the distance between the second connection point 432 and the third position 213 (the length of the parasitic stub 430 between the second connection point 432 and the third position 213).

[0467] In one embodiment, the second connection point 432 may be located in the second current maximum region of the parasitic stub 430 between the second position 212 and the third position 213. Wherein, the second current maximum region is generated by the coupling of the first antenna 401.

[0468] It should be understood that the above-mentioned second current maximum region generated by the first antenna 401 can be understood as the region where the current maximum is located in the current path generated by the coupling of the first antenna 401 on the parasitic stub 430.

[0469] When the second connection point 432 is located in the second current maximum region, the influence of the second element 442 on the first antenna 401 is smaller, and the parasitic stub 430 can improve the radiation characteristics of the first antenna 401 more.

[0470] In one embodiment, the equivalent inductance value of the second element 442 can be determined according to the actual frequency of the second frequency band. In one embodiment, when the center frequency of the second frequency band is less than or equal to 2 GHz, the equivalent inductance value of the second element 442 is less than or equal to 2 pF. When the center frequency of the second frequency band is greater than 2 GHz, the equivalent inductance value of the second element 442 is greater than or equal to 1 pF.

[0471] In one embodiment, the first frame 210 is coupled to the floor 300 at the first position 211. In one embodiment, the first frame 210 is coupled to the floor 300 at the fourth position 214.

[0472] It should be understood that one end of the first radiator 410 and / or the second radiator 420 is a grounded end and the other end is an open end, which can form a structure similar to an IFA or a structure similar to a left-handed antenna.

[0473] In one embodiment, the resonance generated by the first radiator 410 and / or the second radiator 420 can correspond to a quarter-wavelength mode. The electrical length of the first radiator 410 is approximately one quarter of the first wavelength. The electrical length of the second radiator 420 is approximately one quarter of the second wavelength.

[0474] In one embodiment, the first frame 210 has an insulating gap at the first position 211. In one embodiment, the first frame 210 has an insulating gap at the fourth position 214.

[0475] It should be understood that both ends of the first radiator 410 and / or the second radiator 420 are open ends, forming an antenna structure similar to a dipole.

[0476] In one embodiment, the resonance generated by the first radiator 410 and / or the second radiator 420 can correspond to a half-wavelength mode. The electrical length of the first radiator 410 is approximately one half of the first wavelength. The electrical length of the second radiator 420 is approximately one half of the second wavelength.

[0477] In one embodiment, both ends of the parasitic stub 430 are open ends, forming an antenna structure similar to a dipole. The parasitic stub 430 operates in a half-wavelength mode. The parasitic stub 430 can generate parasitic resonance by the line DM mode in the above embodiment.

[0478] It should be understood that in the embodiments of the present application, the embodiments of the present application do not limit the structure formed by the first radiator 410 and the second radiator 420. For example, the first frame 210 has an insulating gap at the first position 211 or the fourth position 214, and the structure formed by the first radiator 410 and the second radiator 420 can be determined according to actual production or design.

[0479] In one embodiment, the second antenna 402 further includes a third element 443, as Figure 29 shown. The second radiator 420 may further include a third connection point 433, and the parasitic stub 430 may further include a fourth connection point 434. The second insulating gap is located between the third connection point 433 and the fourth connection point 434. The third element 443 is coupled between the third connection point 433 and the fourth connection point 434.

[0480] It should be understood that for the metamaterial structure in the above embodiments that the second radiator 420 and the parasitic stub 430 can jointly form, the relevant structure definitions can refer to the definitions of the above metamaterial structure. For example, the specific value of the third element 443, and the distance between the third connection point 433 and / or the fourth connection point 434 and the second insulating gap, etc., will not be elaborated one by one for the sake of brevity of the discussion.

[0481] In one embodiment, the second radiator 420, the parasitic stub 430, and the first element 441 are used to generate a second resonance and a third resonance, and the resonance frequency band of the second resonance includes the above-mentioned second frequency band. In one embodiment, the resonance point frequency of the first resonance is less than or equal to the resonance point frequency of the second resonance. The resonance point frequency of the first resonance is greater than the resonance point frequency of the third resonance.

[0482] It should be understood that when the second radiator 420 and the parasitic stub 430 can jointly form the metamaterial structure in the above embodiments, the parasitic stub 430 is not used to generate parasitic resonance, and the parasitic stub 430 and the second radiator 420 jointly serve as the radiator of the second antenna 402.

[0483] At the resonance point of the second resonance, the currents on the parasitic stub 430 are in the same direction. The third resonance can correspond to the second current path in the above embodiments. At the resonance point of the third resonance, the currents on the parasitic stub 430 include partial reverse currents.

[0484] In one embodiment, the third resonance can be used to improve the isolation between the first antenna 401 and the second antenna 402 in the first frequency band.

[0485] It should be understood that at the resonance point of the third resonance, in the second current path coupled by the first antenna 401 on the parasitic stub 430, the currents on the parasitic stub 430 include partial reverse currents, and the currents on the second current path can cancel part of the currents on the first current path, so that the overall current coupled by the first antenna 401 on the second radiator 420 is weakened, and further the coupling between the first radiator 410 and the second radiator 420 is weakened, improving the isolation between the first antenna 401 and the second antenna 402.

[0486] In one embodiment, the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz. In one embodiment, the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is less than or equal to 800 MHz.

[0487] It should be understood that, compared with the resonance point of the first resonance, the resonance point of the third resonance is closer to the low frequency. When the frequency between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is within a certain range, the current on the second current path cancels out the current on the first current path more effectively, and there is better isolation between the first antenna 401 and the second antenna 402. Figure 30 and Figure 31 is Figure 29 the simulation result of the S parameters of the first antenna and the second antenna in the electronic device 100 shown. Among them, Figure 30 is the simulation result of the S parameters of the first antenna and the second antenna when the first element and the second element are not set. Figure 31 is the simulation result of the S parameters of the first antenna and the second antenna when the first element and the second element are set.

[0488] As Figure 30 and Figure 31 shown, the first antenna (S11) resonates near 1.55 GHz, which can correspond to the above-mentioned first resonance, and the resonance frequency band of the first resonance includes the L1 band in GPS. The second antenna (S22) resonates near 1.75 GHz, which can correspond to the above-mentioned second resonance, and the resonance frequency band of the second resonance includes the B3 band in LTE.

[0489] In addition, the second antenna generates a new resonance near 0.6 GHz, which can be understood as the third resonance generated by the second current path introduced due to the loading of the first element on the parasitic stub.

[0490] When the first element and the second element are not set, in the first frequency band, the isolation (S12) between the first antenna and the second antenna is only about 12 dB, and in the second frequency band, the isolation (S12) between the first antenna and the second antenna is only about 9 dB, as Figure 30 shown.

[0491] When the first element and the second element are set, in the first frequency band, the isolation (S12) between the first antenna and the second antenna is increased to about 14 dB, and in the second frequency band, the isolation (S12) between the first antenna and the second antenna is increased to about 14 dB, as Figure 31 shown.

[0492] Figure 32 is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0493] As Figure 32 shown, the electronic device 100 may include a first housing 201, a second housing 202, a first rotating shaft 203, and a ground plane 300.

[0494] Among them, the first housing 201 includes a first frame 210, and at least a part of the first frame 210 is spaced apart from the floor 300. The second housing 202 includes a second frame 220, and at least a part of the second frame 220 is spaced apart from the floor 300.

[0495] The first rotating shaft 203 is located between the first housing 201 and the second housing 202, and the first rotating shaft 203 is rotatably connected to the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In one embodiment, the floor 300 may include a first part and a second part. The first part may be located within the first housing 201, and the second part may be located within the second housing 202. The first part and the second part may be connected by the first rotating shaft 203.

[0496] It should be understood that Figure 32 the shown electronic device 100 and Figure 28 and Figure 29 the shown electronic device 100 only differ in whether the electronic device 100 can be folded.

[0497] In Figure 28 and Figure 29 the shown electronic device 100, the electronic device 100 only includes one housing, and the first radiator 410 of the first antenna 401 and the second radiator 420 of the second antenna 402 both include part of the frame of the housing.

[0498] However, in Figure 32 the shown electronic device 100, the electronic device 100 includes a plurality of housings (for example, the first housing and the second housing 202), and the electronic device 100 is a foldable electronic device. The first radiator 410 of the first antenna 401 and the second radiator 420 of the second antenna 402 both include part of the frame of the first housing 201.

[0499] In one embodiment, the second frame 220 may further include a fifth position 215 and a sixth position 216, as Figure 33 shown. The second frame 220 has an insulating gap or is coupled to the floor 300 at the fifth position 215 and the sixth position 216.

[0500] In one embodiment, the electronic device 100 may further include a parasitic stub 511. The parasitic stub 511 includes a conductive part of the second frame 220 between the fifth position 215 and the sixth position 216. At least a part of the parasitic stub 511 is spaced apart from the floor 300.

[0501] When the electronic device 100 is in a folded state, the parasitic stub 511 and the first radiator 410 overlap at least partially in a first direction. Herein, the first direction is the thickness direction of the electronic device 100, or when the electronic device 100 is in an unfolded state, the first direction is a direction perpendicular to the display screen, for example, the x direction.

[0502] It should be understood that the parasitic stub 511 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401. For example, the frequency difference between the resonant point frequency of the parasitic resonance generated by the parasitic stub 511 and the resonant point frequency of the resonance generated by the first antenna 401 is greater than or equal to 100 MHz and less than or equal to 400 MHz. In one embodiment, when a radio frequency signal is fed into the first feeding point 412, the currents on the first radiator 410 and the parasitic stub 511 are in the same direction.

[0503] In one embodiment, the second frame 220 is coupled to the ground plane 300 at a fifth position 215 and has a third insulating gap at a sixth position 216.

[0504] It should be understood that one end of the parasitic stub 511 is a grounded end and the other end is an open end, which can form a structure similar to an IFA or a left-handed antenna structure. The parasitic stub 511 can operate in a quarter-wavelength mode. The embodiments of the present application do not limit the specific structure of the parasitic stub 511, which can be determined according to actual production or design. For example, the second frame 220 has insulating gaps at both the fifth position 215 and the sixth position 216.

[0505] In one embodiment, when the electronic device 100 is in a folded state, the first insulating gap is aligned with the third insulating gap to improve the aesthetics of the electronic device 100.

[0506] In one embodiment, the second frame 220 may further include a seventh position 217 and an eighth position 218, as Figure 33 shown. The second frame 220 has insulating gaps or is coupled to the ground plane 300 at the seventh position 217 and the eighth position 218. In one embodiment, the fifth position 215, the sixth position 216, the seventh position 217, and the eighth position 218 are sequentially arranged on the second frame.

[0507] In one embodiment, the electronic device 100 may further include a parasitic stub 512. The parasitic stub 512 includes the conductive portion of the second frame 220 between the seventh position 217 and the eighth position 218. At least a part of the parasitic stub 511 is spaced apart from the ground plane 300.

[0508] When the electronic device 100 is in a folded state, the parasitic stub 512 and the second radiator 420 overlap at least partially in the first direction.

[0509] It should be understood that the parasitic stub 512 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402. For example, the frequency difference between the resonant frequency of the parasitic resonance generated by the parasitic stub 512 and the resonant frequency of the resonance generated by the second antenna 402 is greater than or equal to 100 MHz and less than or equal to 400 MHz. In one embodiment, when the second feeding point 422 feeds a radio frequency signal, the current on the second radiator 420 and the current on the parasitic stub 512 are in the same direction.

[0510] In one embodiment, the second frame 220 is coupled to the floor 300 at the eighth position 218 and has a fourth insulating gap at the seventh position 217.

[0511] It should be understood that one end of the parasitic stub 512 is a grounded end and the other end is an open end, which can form a structure similar to an IFA or a left-handed antenna structure. The parasitic stub 512 can operate in a quarter-wavelength mode. The specific structure of the parasitic stub 512 in the embodiments of the present application is not limited and can be determined according to actual production or design. For example, the second frame 220 has insulating gaps at both the seventh position 217 and the eighth position 218.

[0512] In one embodiment, when the electronic device 100 is in a folded state, the second insulating gap is aligned with the fourth insulating gap to improve the aesthetics of the electronic device 100.

[0513] In one embodiment, the second frame 220 has a third insulating gap and a fourth insulating gap at the sixth position 216 and the seventh position 217 respectively. The parasitic stub 512 includes the conductive part of the second frame 220 between the sixth position 216 and the eighth position 218, as Figure 34 shown.

[0514] In one embodiment, the second antenna 402 may further include a fourth element 444. The parasitic stub 512 may further include a fifth connection point 435 and a sixth connection point 436, and the fourth insulating gap is located between the fifth connection point 435 and the sixth connection point 436. The fourth element 444 is coupled between the fifth connection point 435 and the sixth connection point 436.

[0515] It should be understood that the metamaterial structure formed by the parasitic stub 512 is similar to the metamaterial structure formed by the second radiator 420 in the above embodiments. The relevant structure definitions can refer to the definitions of the above metamaterial structure, and will not be elaborated one by one for the sake of brevity of discussion.

[0516] For the sake of brevity of discussion, Figures 32 to 34 the first antenna 401 and the second antenna 402 shown are connected to Figure 28 and Figure 29The similar parts of the first antenna 401 and the second antenna 402 shown are not described one by one. For example, the similar parts include: the position and structure of the first radiator 410; the position and structure of the second radiator 420; the position and structure of the parasitic stub 430; the relationship between the first frequency band and the second frequency band; the equivalent inductance of the first element 441; the equivalent capacitance of the second element 442; the position of the second connection point 432; and so on.

[0517] Figure 35 and Figure 36 is Figure 34 the simulation results of the radiation efficiency and the system efficiency of the first antenna and the second antenna in the electronic device 100 shown. Among them, Figure 35 is Figure 34 the simulation results of the radiation efficiency and the system efficiency of the first antenna and the second antenna in the electronic device 100 shown. Figure 36 is Figure 34 the simulation results of the radiation efficiency and the system efficiency of the second antenna in the electronic device 100 shown.

[0518] It should be understood that for the sake of brevity of discussion, in the Figure 35 and Figure 36 shown simulation results, only the first frequency band including the L1 band (1578.42 ± 1.023 MHz) in GPS and the second frequency band including the B3 band (1.71 - 1.785 GHz) in LTE are taken as examples for illustration.

[0519] As Figure 35 shown, in the Figure 34 shown electronic device 100, after the parasitic stub 511 is set for the first antenna, in the first frequency band, the radiation efficiency is increased by about 2 dB, and the radiation efficiency is increased by about 2 dB.

[0520] As Figure 35 shown, in the Figure 34 shown electronic device 100, after the parasitic stub 512 is set for the second antenna, in the second frequency band, the radiation efficiency is increased by about 0.5 dB, and the radiation efficiency is increased by about 0.5 dB.

[0521] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. An electronic device, characterized in that, include: a first shell, a second shell and a floor, The first shell includes a first frame, and the second shell includes a second frame; The first frame includes a first position, a second position and a third position which are arranged in sequence, the first frame is coupled with the floor or has an insulating gap at the first position, and the first frame has a first insulating gap and a second insulating gap at the second position and the third position respectively; The second frame includes a fourth position and a fifth position, the second frame has a third insulating gap at the fourth position, and the second frame is coupled with the floor or has an insulating gap at the fifth position; A first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; as well as A first antenna, the first antenna comprising: a first radiator, the first radiator comprising a conductive portion of the first frame between the first position and the second position, at least a portion of the first radiator being spaced apart from the floor, and a first feeding circuit, the first radiator comprising a first feeding point, the first feeding circuit being coupled to the first feeding point to feed a radio frequency signal of a first frequency band; A second antenna, the second antenna comprising: a second radiator, the second radiator comprising a conductive portion of the second frame between the fourth position and the fifth position, at least a portion of the second radiator being spaced apart from the floor, and a second feeding circuit, the second radiator comprising a second feeding point, the second feeding circuit being coupled to the second feeding point to feed a radio frequency signal of a second frequency band; The electronic device further comprises: a parasitic branch, the parasitic branch comprising a conductive portion of the first frame between the second position and the third position, at least a portion of the parasitic branch being spaced apart from the floor, and A first element, the parasitic branch includes a first connection point, the first element is inductive, and the first element is coupled between the first connection point and the floor; Wherein, based on the electronic device being in a folded state, the parasitic branch and the second radiator at least partially overlap along a first direction, and the first radiator and the second radiator are staggered along the first direction, and the first direction is a thickness direction of the electronic device; Based on the electronic device being in a folded state, a distance between the second position and the fourth position is smaller than a distance between the second position and the fifth position; A center frequency of the first frequency band is less than or equal to a center frequency of the second frequency band, and a frequency difference between a center frequency of the first frequency band and a center frequency of the second frequency band is less than or equal to 300 MHz.

2. The electronic device according to claim 1, characterized in that: The distance between the first connection point and the second position is greater than the distance between the first connection point and the third position.

3. The electronic device according to claim 1 or 2, characterized in that: The first connection point is located in the first current maximum region of the parasitic stub, and the first current maximum region is generated by the coupling of the second antenna.

4. The electronic device according to any one of claims 1 to 3, characterized in that The first radiator is used to generate a first resonance, and the resonance frequency band of the first resonance includes the first frequency band; The second radiator is used to generate a second resonance, and the resonance frequency band of the second resonance includes the second frequency band, and the resonance point frequency of the second resonance is greater than or equal to the resonance point frequency of the first resonance; The parasitic stub and the first element are used to generate a first parasitic resonance and a second parasitic resonance, the resonance point frequency of the first parasitic resonance is greater than the resonance point frequency of the second resonance, and the resonance point frequency of the second parasitic resonance is less than the resonance point frequency of the first resonance.

5. The electronic device according to claim 4, characterized in that The frequency difference between the resonance point frequency of the second parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz.

6. The electronic device according to claim 4 or 5, characterized in that The frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the second resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

7. The electronic device according to any one of claims 4 to 6, characterized in that At the resonance point of the first parasitic resonance, the currents on the parasitic stub are in the same direction, and / or At the resonance point of the second parasitic resonance, the currents on the parasitic stub include partial reverse currents.

8. The electronic device according to any one of claims 4 to 7, characterized in that The first parasitic resonance is used to improve the radiation efficiency of the second antenna in the second frequency band, and / or The second parasitic resonance is used to improve the isolation between the first antenna and the second antenna in the first frequency band.

9. The electronic device according to any one of claims 1 to 8, characterized in that The electronic device further includes a second element, the parasitic stub includes a second connection point, the second element is capacitive, and the second element is coupled between the second connection point and the ground plane.

10. The electronic device according to claim 9, characterized in that The distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

11. The electronic device according to claim 9 or 10, characterized in that The second connection point is located in the third current maximum region of the parasitic stub, and the third current maximum region is generated by the coupling of the first antenna.

12. The electronic device according to any one of claims 9 to 11, characterized in that, The second element is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

13. The electronic device according to any one of claims 1 to 12, characterized in that The first frame is coupled to the ground plane at the first position; The second frame has a fourth insulating gap at the fifth position respectively; Wherein, the first insulating gap and the third insulating gap are aligned, and / or the first insulating gap and the fourth insulating gap are aligned.

14. The electronic device according to any one of claims 1 to 13, wherein the second side frame further includes a sixth position, the fifth position is located between the fourth position and the sixth position, the second side frame has a fourth insulating gap at the fifth position, and the second side frame is coupled to the floor at the sixth position; the second radiator includes a conductive portion of the second side frame between the fourth position and the sixth position; the second antenna further includes a third element, the second radiator includes a third connection point and a fourth connection point, the fourth insulating gap is located between the third connection point and the fourth connection point, and the third element is coupled between the third connection point and the fourth connection point.

15. The electronic device according to claim 14, wherein the distance between the fourth insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5 mm.

16. The electronic device according to any one of claims 1 to 15, wherein the first side frame further includes a seventh position, the third position is located between the second position and the seventh position, and the first side frame is coupled to the floor at the seventh position; the parasitic stub includes a conductive portion of the first side frame between the second position and the seventh position, and the first connection point is on the parasitic stub between the second position and the third position; the first antenna and the second antenna further include a fourth element, the parasitic stub includes a fifth connection point and a sixth connection point, the second insulating gap is located between the fifth connection point and the sixth connection point, and the fourth element is coupled between the fifth connection point and the sixth connection point.

17. The electronic device according to claim 16, wherein the distance between the second insulating gap and the fifth connection point and the sixth connection point is less than or equal to 5 mm.

18. The electronic device according to any one of claims 1 to 17, wherein the length L1 of the first side frame between the first position and the second position and the length L2 of the first side frame between the second position and the third position satisfy: L1×150%≤L2.

19. The electronic device according to any one of claims 1 to 18, wherein the first frequency band includes 1578.42±1.023 MHz, the second frequency band includes 1.71 GHz - 1.785 GHz, and / or the first frequency band includes 2.4 GHz - 2.4835 GHz, the second frequency band includes 2.5 GHz - 2.57 GHz or 2.496 GHz - 2.69 GHz.

20. The electronic device according to any one of claims 1 to 19, characterized in that, The first side frame between the second position and the third position does not include a ground point.

21. An electronic device, characterized in that, Comprising: a first housing, a second housing and a floor, the first housing includes a first side frame, and the second housing includes a second side frame; The first frame includes a first position, a second position, and a third position arranged in sequence. The first frame is coupled to the floor or has an insulating gap at the first position, and the first frame has a first insulating gap and a second insulating gap at the second position and the third position respectively; The second frame includes a fourth position and a fifth position. The second frame has a third insulating gap and a fourth insulating gap at the fourth position and the fifth position respectively; A first rotating shaft, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; And A first antenna, the first antenna includes: A first radiator, the first radiator includes a conductive portion of the first frame between the first position and the second position, at least a portion of the first radiator is spaced apart from the floor, and A first feeding circuit, the first radiator includes a first feeding point, and the first feeding circuit is coupled to the first feeding point to feed a radio frequency signal in a first frequency band; A second antenna, the second antenna includes: A second radiator, the second radiator includes a conductive portion of the second frame between the fourth position and the fifth position, at least a portion of the second radiator is spaced apart from the floor, A second feeding circuit, the second radiator includes a second feeding point, and the second feeding circuit is coupled to the second feeding point to feed a radio frequency signal in a second frequency band, and A first element, the second radiator includes a first connection point, the first element is inductive, and the first element is coupled between the first connection point and the floor; The electronic device further includes: A parasitic stub, the parasitic stub includes a conductive portion of the first frame between the second position and the third position, at least a portion of the parasitic stub is spaced apart from the floor; Wherein, based on the electronic device being in a folded state, the parasitic stub and the second radiator at least partially overlap in a first direction, and the first radiator and the second radiator are misaligned in the first direction, and the first direction is the thickness direction of the electronic device; The center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz.

22. The electronic device according to claim 21, wherein Based on the electronic device being in a folded state, the distance between the second position and the fourth position is less than the distance between the second position and the fifth position; The distance between the first connection point and the fourth position is greater than the distance between the first connection point and the fifth position, and the distance between the second feeding point and the fourth position is less than the distance between the second feeding point and the fifth position.

23. The electronic device according to claim 21 or 22, wherein The first connection point is located in the second current maximum point region of the second radiator, and the second current maximum point region is generated by coupling of the second antenna.

24. The electronic device according to any one of claims 21 to 23, characterized in that the first radiator is used to generate a first resonance, and the resonance frequency band of the first resonance includes the first frequency band; the second radiator and the first element are used to generate a second resonance and a third resonance, the resonance frequency band of the second resonance includes the second frequency band, the resonance point frequency of the second resonance is greater than or equal to the resonance point frequency of the first resonance, and the resonance point frequency of the third resonance is less than the resonance point frequency of the first resonance; the parasitic stub is used to generate a first parasitic resonance, and the resonance point frequency of the first parasitic resonance is greater than the resonance point frequency of the second resonance.

25. The electronic device according to claim 24, characterized in that the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz.

26. The electronic device according to claim 24 or 25, characterized in that the frequency difference between the resonance point frequency of the first parasitic resonance and the resonance point frequency of the first resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

27. The electronic device according to any one of claims 24 to 26, characterized in that at the resonance point of the second resonance, the currents on the second radiator are in the same direction, and / or at the resonance point of the third resonance, the currents on the second radiator include partial reverse currents.

28. The electronic device according to any one of claims 24 to 27, characterized in that the first parasitic resonance is used to improve the radiation efficiency of the first antenna in the first frequency band, and / or the third resonance is used to improve the isolation between the first antenna and the second antenna in the first frequency band.

29. The electronic device according to any one of claims 21 to 28, characterized in that the electronic device further includes a second element, the parasitic stub includes a second connection point, the second element is capacitive, and the second element is coupled between the second connection point and the ground plane.

30. The electronic device according to claim 29, characterized in that the distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

31. The electronic device according to claim 29 or 30, characterized in that the second connection point is located in the third current maximum point area of the parasitic stub, and the third current maximum point area is generated by coupling of the first antenna.

32. The electronic device according to any one of claims 29 to 31, characterized in that, The second element is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

33. The electronic device according to any one of claims 21 to 32, characterized in that the length L1 of the first frame between the first position and the second position and the length L2 of the first frame between the second position and the third position satisfy: L1×150% ≤ L2.

34. The electronic device according to any one of claims 21 to 33, characterized in that, The second frame between the fourth position and the fifth position does not include a grounding point.

35. An electronic device, characterized in that, Including: a first frame and a ground plane, The first frame includes a first position, a second position, a third position, and a fourth position arranged in sequence. The first frame is coupled to the floor or has an insulating gap at the first position. The first frame has a first insulating gap and a second insulating gap at the second position and the third position respectively. The first frame is coupled to the floor or has an insulating gap at the fourth position; A first antenna, the first antenna includes: A first radiator, the first radiator includes a conductive portion of the first frame between the first position and the second position. At least a portion of the first radiator is spaced apart from the floor, and A first feeding circuit, the first radiator includes a first feeding point. The first feeding circuit is coupled to the first feeding point to feed a radio frequency signal in a first frequency band; A second antenna, the second antenna includes: A second radiator, the second radiator includes a conductive portion of the first frame between the third position and the fourth position. At least a portion of the second radiator is spaced apart from the floor, and A second feeding circuit, the second radiator includes a second feeding point. The second feeding circuit is coupled to the second feeding point to feed a radio frequency signal in a second frequency band; The electronic device further includes: A first parasitic stub, the first parasitic stub includes a conductive portion of the first frame between the second position and the third position. At least a portion of the first parasitic stub is spaced apart from the floor, and A first element, the first element is inductive. The first parasitic stub includes a first connection point. The first element is coupled between the first connection point and the floor; Wherein, the center frequency of the first frequency band is less than or equal to the center frequency of the second frequency band, and the frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band is less than or equal to 300 MHz.

36. The electronic device according to claim 35, wherein The distance between the first connection point and the second position is greater than the distance between the first connection point and the third position.

37. The electronic device according to claim 35 or 36, wherein The first connection point is located in a first current maximum region of the first parasitic stub, and the first current maximum region is generated by coupling of the second antenna.

38. The electronic device according to any one of claims 35 to 37, characterized in that, The first element is used to improve the isolation between the first antenna and the second antenna in the first frequency band.

39. The electronic device according to any one of claims 35 to 38, wherein The first antenna and the second antenna further include a second element, the second element is capacitive. The first parasitic stub includes a second connection point. The second element is coupled between the second connection point and the floor.

40. The electronic device according to claim 39, wherein The distance between the second connection point and the second position is less than the distance between the second connection point and the third position.

41. The electronic device according to claim 39 or 40, wherein The second connection point is located in the third current maximum region of the first parasitic stub, and the third current maximum region is generated by the coupling of the first antenna.

42. The electronic device according to any one of claims 39 to 41, characterized in that, The second element is used to improve the isolation between the first antenna and the second antenna in the second frequency band.

43. The electronic device according to any one of claims 35 to 42, wherein The first frame is coupled to the ground at the fourth position; The second antenna further includes a third element, the second radiator includes a third connection point, the first parasitic stub includes a fourth connection point, and the third element is coupled between the third connection point and the fourth connection point.

44. The electronic device according to claim 43, wherein The distance between the second insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5 mm.

45. The electronic device according to any one of claims 35 to 44, wherein The electronic device further includes a first housing, a second housing, and a first rotating shaft. The first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; Wherein, the first housing includes the first frame, The second housing includes a second frame; Wherein, the second frame includes a fifth position and a sixth position. The second frame is coupled to the ground or has an insulating gap at the fifth position, and the second frame is coupled to the ground or has an insulating gap at the sixth position; The electronic device further includes a second parasitic stub. The second parasitic stub includes a conductive portion between the fifth position and the sixth position of the second frame, and at least a portion of the second parasitic stub is spaced apart from the ground; Based on the electronic device being in a folded state, the second parasitic stub and the first radiator at least partially overlap in a first direction, and the first direction is the thickness direction of the electronic device.

46. The electronic device according to any one of claims 35 to 45, wherein The electronic device further includes a first housing, a second housing, and a first rotating shaft. The first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected to the first housing and the second housing respectively; Wherein, the first housing includes the first frame, the second housing includes a second frame; the second frame includes a seventh position and an eighth position. The second frame is coupled to the ground or has an insulating gap at the seventh position, and the second frame is coupled to the ground or has an insulating gap at the eighth position; The electronic device further includes a third parasitic stub. The third parasitic stub includes a conductive portion between the seventh position and the eighth position of the second frame, and at least a portion of the third parasitic stub is spaced apart from the ground; Based on the electronic device being in a folded state, the third parasitic stub and the second radiator at least partially overlap in a first direction, and the first direction is the thickness direction of the electronic device.

47. The electronic device according to any one of claims 35 to 44, wherein the electronic device further comprises a first housing, a second housing and 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; wherein, the first housing comprises the first frame, and the second housing comprises a second frame; wherein, the second frame comprises a fifth position, a sixth position, a seventh position and an eighth position arranged in sequence, the second frame is coupled to the floor at the fifth position, the second frame has a third insulating gap and a fourth insulating gap at the sixth position and the seventh position respectively, and the second frame is coupled to the floor at the eighth position; the electronic device further comprises a second parasitic stub and a third parasitic stub, the second parasitic stub comprises a conductive part of the second frame between the fifth position and the sixth position, the third parasitic stub comprises a conductive part of the second frame between the sixth position and the eighth position, at least part of the second parasitic stub is spaced from the floor, and at least part of the third parasitic stub is spaced from the floor; the second antenna further comprises a fourth element, the third parasitic stub comprises a fifth connection point and a sixth connection point, the fourth insulating gap is located between the fifth connection point and the sixth connection point, and the fourth element is coupled between the fifth connection point and the sixth connection point; based on the electronic device being in a folded state, at least part of the second parasitic stub and the first radiator overlap in a first direction, at least part of the third parasitic stub and the second radiator overlap in the first direction, and the first direction is the thickness direction of the electronic device.

48. The electronic device according to any one of claims 35 to 47, wherein the length L1 of the first frame between the first position and the second position and the length L2 of the first frame between the second position and the third position satisfy: L1×150%≤L2.

49. The electronic device according to any one of claims 35 to 48, characterized in that, the first frame between the second position and the third position does not include a grounding point.

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