Electronic device

Abstract

Provided in the embodiments of the present application is an electronic device. The electronic device comprises a first antenna and a second antenna. The first antenna uses conductive portions of a frame of a first housing as a first radiator and a parasitic branch. The second antenna uses a conductive portion of a frame of a second housing as a second radiator, and the second radiator is disposed adjacent to the parasitic branch. The electronic device may be a foldable electronic device; and when the electronic device is in a folded state, a good degree of isolation is achieved between the first antenna and the second antenna, and the first antenna and the second antenna may operate at the same time, thereby improving the communication performance of the electronic device.

Description

Electronic device

[0001] The present application claims priority from the Chinese Patent Application No. 202410544831.9 filed on April 28, 2024, and entitled "Electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of wireless communication, and in particular, to an electronic device. BACKGROUND

[0003] With the rapid development of wireless communication technology, the past second generation (2G) mobile communication system mainly supports the function of calling, and the electronic device is only a tool for people to send and receive short messages and voice communication. The wireless Internet function is extremely slow because the data transmission uses voice channels for transmission. Nowadays, in addition to being used for calling, sending short messages, and taking pictures, electronic devices can also be used for online music listening, network video watching, real-time video, etc., covering various aspects of people's life such as calling, video entertainment, and e-commerce. This has caused the number of antennas that need to be set in the electronic device to gradually increase.

[0004] For foldable electronic devices, in the folded state, the radiation environment of the antenna is limited. In order to improve the radiation characteristics (such as bandwidth, efficiency, etc.) of the antenna, a parasitic branch is usually arranged near the radiator. However, the parasitic branch will make the isolation between the antenna and other antennas arranged nearby worse, causing inconvenience to the user. SUMMARY

[0005] The present 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 radiation characteristics of the antenna through a parasitic branch, and the first antenna and the second antenna have good isolation.

[0006] In a first aspect, an electronic device is provided, comprising: a first housing comprising a first bezel, a second housing comprising a second bezel; the first bezel comprising a first position, a second position and a third position arranged in sequence, the first bezel being coupled with or having an insulating gap with the floor at the first position, the first bezel having a first insulating gap and a second insulating gap at the second position and the third position respectively; the second bezel comprising a fourth position and a fifth position, the second bezel having a third insulating gap at the fourth position, the second bezel being coupled with or having an insulating gap with the floor at the fifth position; a first hinge located between the first housing and the second housing, and the first hinge being rotationally connected with the first housing and the second housing respectively; and a first antenna comprising: a first radiator comprising a conductive part of the first bezel between the first position and the second position, at least part of the first radiator being spaced apart from the floor, and a first feed circuit, the first radiator comprising a first feed point, the first feed circuit being coupled with the first feed point to feed a radio frequency signal of a first frequency band; a second antenna comprising: a second radiator comprising a conductive part of the second bezel between the fourth position and the fifth position, at least part of the second radiator being spaced apart from the floor, and a second feed circuit, the second radiator comprising a second feed point, the second feed circuit being coupled with the second feed point to feed a radio frequency signal of a second frequency band; the electronic device further comprising: a parasitic branch comprising a conductive part of the first bezel between the second position and the third position, at least part of the parasitic branch being spaced apart from the floor, and a first element, the parasitic branch comprising a first connection point, the first element being inductive, the first element being 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 in a first direction, and the first radiator and the second radiator are arranged staggered in the first direction, the first direction being a thickness direction of the electronic device; based on the electronic device being in the folded state, a distance between the second position and the fourth position is less 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 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.

[0007] According to the embodiment of the present application, when the first feeding point feeds the radio frequency signal when the electronic device is in the folded state, the first antenna can couple to generate a first current path on the parasitic branch. In the first current path, the parasitic branch between the second position and the third position has a same direction current.

[0008] In the first frequency band, since the first connection point of the parasitic branch and the ground plate are coupled with the first element, the parasitic branch can additionally generate a second current path. In the second current path, the current on the parasitic branch on both sides of the first connection point is reversed.

[0009] Therefore, the current on the first current path and the current on the second path are partially reversed, and the current on the second path can offset 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.

[0010] And since the first element is inductive, the operating frequency band of the first antenna 401 is lower than that of the second antenna, and the inductive element has the characteristics of low-pass high resistance. The additional current path generated by the second antenna (the second feeding point feeds the radio frequency signal) on the parasitic branch is weak and does not have a large impact on the original current path. The parasitic branch 430 can be used to improve the radiation characteristics (such as radiation efficiency) of the second antenna.

[0011] In combination with the first aspect, in some implementations 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.

[0012] According to the embodiment of the present application, when the first connection point is arranged on the side of the parasitic branch away from the first radiator, the current on the first current path and the current on the second path can be increased to be reversed and offset, further reducing the coupling between the first radiator and the second radiator and improving the isolation between the first antenna and the second antenna.

[0013] In combination with the first aspect, in some implementations of the first aspect, the first connection point is located in a first current large point area of the parasitic branch, and the first current large point area is generated by the second antenna.

[0014] According to the embodiment of the present application, the first current large point area generated by the second antenna can be understood as the area of the current large point on the current path generated by the second antenna on the parasitic branch. Since the current corresponds to the electric field, the current large point can also be understood as the electric field zero point (the electric field on both sides of the electric field zero point is reversed). In the embodiment of the present application, the current large point area can be understood as an area within 5 mm from the maximum current point, or an area within 5 mm from the electric field zero point.

[0015] When the first connection point is located in the first current large point area, the first element has less influence on the second antenna, and the radiation characteristics of the parasitic branch on the second antenna can be improved more.

[0016] With reference to the first aspect, in some implementations of the first aspect, the first radiator is configured to generate a first resonance, a resonance frequency band of the first resonance including the first frequency band; the second radiator is configured to generate a second resonance, a resonance frequency band of the second resonance including the second frequency band, a resonance point frequency of the second resonance being greater than or equal to a resonance point frequency of the first resonance; and the parasitic branch and the first element are configured to generate a first parasitic resonance and a second parasitic resonance, a resonance point frequency of the first parasitic resonance being greater than the resonance point frequency of the second resonance, and a resonance point frequency of the second parasitic resonance being less than the resonance point frequency of the first resonance.

[0017] According to the embodiments of the present application, the first current path generated by the first antenna on the parasitic branch and the current path generated by the second antenna on the parasitic branch in the above embodiments can correspond to the first parasitic resonance. The second current path generated by the first antenna on the parasitic branch in the above embodiments can correspond to the second parasitic resonance.

[0018] With reference to the first aspect, in some implementations of the first aspect, a 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.

[0019] According to the embodiments of the present application, the resonance point of the second parasitic resonance is closer to the low frequency than the resonance point of the first resonance. 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 current on the second current path and the current on the first current path have better cancellation effect, and the first antenna and the second antenna have better isolation. Moreover, the first antenna will not generate a radiation efficiency pit in the first frequency band 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.

[0020] With reference to the first aspect, in some implementations of the first aspect, a 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.

[0021] 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, the second antenna will not generate a radiation efficiency pit in the second frequency band due to the first parasitic resonance being close to the second resonance, and the second antenna can have better radiation characteristics (e.g., radiation efficiency) in the second frequency band.

[0022] With reference to the first aspect, in some implementations of the first aspect, at the resonance point of the first parasitic resonance, the current on the parasitic branch is in the same direction, and / or, at the resonance point of the second parasitic resonance, the current on the parasitic branch includes partial reverse current.

[0023] With reference to the first aspect, in some implementations of the first aspect, the first parasitic resonance is configured to improve the radiation efficiency of the second antenna in the second frequency band, and / or, the second parasitic resonance is configured to improve the isolation between the first antenna and the second antenna in the first frequency band.

[0024] According to embodiments of the present application, at the resonance point of the first parasitic resonance, the current on the parasitic branch in the current path generated by the first antenna coupling on the parasitic branch and the current path generated by the second antenna coupling on the parasitic branch is in the same direction, which can be used to improve the radiation characteristics (e.g., radiation efficiency) of the antenna.

[0025] At the resonance point of the second parasitic resonance, the current on the parasitic branch in the second current path generated by the first antenna coupling on the parasitic branch includes partial reverse current, which can offset part of the current in the first current path, thereby weakening the overall current generated by the first antenna 401 coupling on the parasitic branch 430 (as the overall current is weakened, the first parasitic resonance has less effect on improving the radiation characteristics of the first antenna), and further weakening the coupling between the first radiator and the second radiator, thereby improving the isolation between the first antenna and the second antenna.

[0026] With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes a second element, the parasitic branch 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.

[0027] According to embodiments of the present application, part of the current in the current path generated by the second antenna flows 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.

[0028] At the same time, since the second element is capacitive, 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. In the parasitic branch, the current path generated by the first antenna is not affected near the second connection point, and the parasitic branch can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna.

[0029] With reference to 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.

[0030] With reference to the first aspect, in some implementations of the first aspect, the second connection point is located at a third current hotspot region of the parasitic branch, the third current hotspot region being generated by the first antenna coupling.

[0031] According to the embodiments of the present application, the second current hotspot region can be understood as a region where a current hotspot is located in a current path generated by the first antenna coupling on the parasitic branch.

[0032] When the second connection point is located at the second current hotspot region, the second element has less influence on the first antenna, and can make the parasitic branch have greater improvement on the radiation characteristics of the first antenna.

[0033] With reference to the first aspect, in some implementations of the first aspect, the second element is configured to improve an isolation degree of the first antenna and the second antenna in the second frequency band.

[0034] With reference to the first aspect, in some implementations of the first aspect, the first frame is coupled with the ground plate at the first position; the second frame has a fourth insulating gap at the fifth position respectively; wherein the first insulating gap is aligned with the third insulating gap, and / or the first insulating gap is aligned with the fourth insulating gap.

[0035] With reference to 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 has a fourth insulating gap at the fifth position respectively, and the second frame is coupled with the ground plate at the sixth position; the second radiator includes a 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.

[0036] With reference to the first aspect, in some implementations of the first aspect, a 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.

[0037] With reference to the first aspect, in some 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, the first frame is coupled with the floor at the seventh position; the parasitic branch includes a conductive part of the first frame between the second position and the seventh position, the first connection point is located on the parasitic branch between the second position and the third position; the first antenna and the second antenna further include a fourth element, the parasitic branch 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, the fourth element is coupled between the fifth connection point and the sixth connection point.

[0038] With reference to the first aspect, in some implementations of the first aspect, a distance between the second insulating gap and the fifth connection point and the sixth connection point is less than or equal to 5 mm.

[0039] With reference to the first aspect, in some implementations of the first aspect, a length L1 of the first frame between the first position and the second position and a length L2 of the first frame between the second position and the third position satisfy: L1 x 150% ≤ L2.

[0040] According to the embodiments of the present application, as the length of the parasitic branch increases, it is more conducive to improve the radiation characteristics of the antenna (the first antenna or the second antenna).

[0041] With reference to the first aspect, in some 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, and the second frequency band includes 2.5 GHz-2.57 GHz or 2.496 GHz-2.69 GHz.

[0042] With reference to the first aspect, in some implementations of the first aspect, the first frame between the second position and the third position does not include a grounding point.

[0043] In a second aspect, an electronic device is provided, comprising: a first housing comprising a first bezel, a second housing comprising a second bezel; the first bezel comprising a first position, a second position and a third position arranged in sequence, the first bezel being coupled with or having an insulating gap with the floor at the first position, the first bezel having a first insulating gap and a second insulating gap at the second position and the third position respectively; the second bezel comprising a fourth position and a fifth position, the second bezel having a third insulating gap and a fourth insulating gap at the fourth position and the fifth position respectively; a first hinge between the first housing and the second housing, and the first hinge being rotationally connected with the first housing and the second housing respectively; and a first antenna comprising: a first radiator comprising a conductive part of the first bezel between the first position and the second position, at least part of the first radiator being spaced apart from the floor, and a first feed circuit, the first radiator comprising a first feed point, the first feed circuit being coupled with the first feed point to feed a radio frequency signal of a first frequency band; a second antenna comprising: a second radiator comprising a conductive part of the second bezel between the fourth position and the fifth position, at least part of the second radiator being spaced apart from the floor, a second feed circuit, the second radiator comprising a second feed point, the second feed circuit being coupled with the second feed point to feed a radio frequency signal of a second frequency band, and a first element, the second radiator comprising a first connection point, the first element being inductive, the first element being coupled between the first connection point and the floor; the first antenna and the second antenna further comprising: a parasitic branch comprising a conductive part of the first bezel between the second position and the third position, at least part of the parasitic branch being spaced apart from 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 misaligned along the first direction, the first direction being a thickness direction of the electronic device; a center frequency of the first frequency band being less than or equal to a center frequency of the second frequency band, and a frequency difference between the center frequency of the first frequency band and the center frequency of the second frequency band being less than or equal to 300 MHz.

[0044] With reference to the second aspect, in some implementations of the second aspect, based on that the electronic device is in the folded state, a distance between the second position and the fourth position is less than a distance between the second position and the fifth position; a distance between the first connection point and the fourth position is greater than a distance between the first connection point and the fifth position, and a distance between the second feeding point and the fourth position is less than a distance between the second feeding point and the fifth position.

[0045] With reference to the second aspect, in some implementations of the second aspect, the first connection point is located at a second current hotspot region of the second radiator, the second current hotspot region being generated by the second antenna coupling.

[0046] With reference to the second aspect, in some implementations of the second aspect, the first radiator is configured to generate a first resonance, a resonance frequency band of the first resonance including the first frequency band; the second radiator and the first element are configured to generate a second resonance and a third resonance, a resonance frequency band of the second resonance including the second frequency band, a resonance point frequency of the second resonance being greater than or equal to a resonance point frequency of the first resonance, a resonance point frequency of the third resonance being less than the resonance point frequency of the first resonance; the parasitic branch is configured to generate a first parasitic resonance, a resonance point frequency of the first parasitic resonance being greater than the resonance point frequency of the second resonance.

[0047] With reference to the second aspect, in some implementations of the second aspect, a 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.

[0048] With reference to the second aspect, in some implementations of the second aspect, a 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.

[0049] With reference to the second aspect, in some implementations of the second aspect, at the resonance point of the second resonance, currents on the second radiator are in the same direction, and / or, at the resonance point of the third resonance, currents on the second radiator include partial reverse currents.

[0050] With reference to the second aspect, in some implementations of the second aspect, the first parasitic resonance is configured to improve a radiation efficiency of the first antenna in the first frequency band, and / or, the third resonance is configured to improve an isolation degree of the first antenna and the second antenna in the first frequency band.

[0051] With reference to the second aspect, in some implementations of the second aspect, 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.

[0052] With reference to the second aspect, in some implementations of the second aspect, a distance between the second connection point and the second location is less than a distance between the second connection point and the third location.

[0053] With reference to the second aspect, in some implementations of the second aspect, the second connection point is located at a third current hotspot region of the parasitic stub, and the third current hotspot region is generated by the first antenna coupling.

[0054] With reference to the second aspect, in some implementations of the second aspect, the second element is configured to improve an isolation of the first antenna and the second antenna at the second frequency band.

[0055] With reference to the second aspect, in some implementations of the second aspect, the first frame is coupled with the ground plane at the first location; and the first insulating gap is aligned with the third insulating gap, and / or the first insulating gap is aligned with the fourth insulating gap.

[0056] With reference to the second aspect, in some implementations of the second aspect, the second frame further includes a sixth location, the fifth location is between the fourth location and the sixth location, and the second frame is coupled with the ground plane at the sixth location; the second radiator includes a conductive portion of the second frame between the fourth location and the sixth location, and the first connection point is located on the second radiator between the fourth location and the fifth location; 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 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.

[0057] With reference to the second aspect, in some implementations of the second aspect, a distance between the fourth insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5mm.

[0058] With reference to the second aspect, in some 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, the first frame is coupled with the floor at the seventh position; the parasitic stub includes a conductive part 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, the fourth element is coupled between the fifth connection point and the sixth connection point.

[0059] With reference to the second aspect, in some implementations of the second aspect, a distance between the second insulating gap and the fifth connection point and the sixth connection point is less than or equal to 5 mm.

[0060] With reference to the second aspect, in some implementations of the second aspect, a length L1 of the first frame between the first position and the second position and a length L2 of the first frame between the second position and the third position satisfy: L1 x 150% ≤ L2.

[0061] With reference to the second aspect, in some 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, and the second frequency band includes 2.5 GHz-2.57 GHz or 2.496 GHz-2.69 GHz.

[0062] With reference to the second aspect, in some implementations of the second aspect, the second frame between the fourth position and the fifth position does not include a ground point.

[0063] In a third aspect, an electronic device is provided, comprising: a first bezel and a floor, the first bezel comprising a first position, a second position, a third position and a fourth position arranged in sequence, the first bezel being coupled with the floor or having an insulating gap at the first position, the first bezel having a second insulating gap and a third insulating gap at the second position and the third position respectively, the first bezel being coupled with the floor or having an insulating gap at the fourth position; a first antenna, the first antenna comprising: a first radiator comprising a conductive part of the first bezel between the first position and the second position, at least part of the first radiator being spaced apart from the floor, and a first feed circuit, the first radiator comprising a first feed point, the first feed circuit being coupled with the first feed point to feed a radio frequency signal of a first frequency band; a second antenna, the second antenna comprising: a second radiator comprising a conductive part of the first bezel between the third position and the fourth position, at least part of the second radiator being spaced apart from the floor, and a second feed circuit, the second radiator comprising a second feed point, the second feed circuit being coupled with the second feed point to feed a radio frequency signal of a second frequency band; the electronic device further comprising: a first parasitic branch, the first parasitic branch comprising a conductive part of the first bezel between the second position and the third position, at least part of the first parasitic branch being spaced apart from the floor, and a first element, the first element being inductive, the first parasitic branch comprising a first connection point, the first element being coupled between the first connection point and the floor; wherein 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 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.

[0064] With reference to the third aspect, in some implementations of the third aspect, a distance between the first connection point and the second position is greater than a distance between the first connection point and the third position.

[0065] With reference to the third aspect, in some implementations of the third aspect, the first connection point is located in a first current hotspot area of the first parasitic branch, the first current hotspot area being generated by coupling of the second antenna.

[0066] With reference to the third aspect, in some implementations of the third aspect, the first element is configured to improve an isolation of the first antenna and the second antenna in the first frequency band.

[0067] With reference to the third aspect, in some implementations of the third aspect, the first antenna and the second antenna further include a second element, the second element is capacitive, the first parasitic branch includes a second connection point, and the second element is coupled between the second connection point and the ground plane.

[0068] With reference to the third aspect, in some implementations of the third aspect, a distance between the second connection point and the second location is less than a distance between the second connection point and the third location.

[0069] With reference to the third aspect, in some implementations of the third aspect, the second connection point is located at a third current hotspot area of the first parasitic branch, and the third current hotspot area is generated by the coupling of the first antenna.

[0070] With reference to the third aspect, in some implementations of the third aspect, the second element is configured to improve an isolation of the first antenna and the second antenna in the second frequency band.

[0071] With reference to the third aspect, in some implementations of the third aspect, the first frame is coupled with the ground plane at the first location, and / or the first frame is coupled with the ground plane at the fourth location.

[0072] With reference to the third aspect, in some implementations of the third aspect, the first frame is coupled with the ground plane at the fourth location; the second antenna further includes a third element, the second radiator includes a third connection point, the first parasitic branch includes a fourth connection point, and the third element is coupled between the third connection point and the fourth connection point.

[0073] With reference to the third aspect, in some implementations of the third aspect, a distance between the second insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5mm.

[0074] With reference to the third aspect, in some implementations of the third aspect, the electronic device further includes a first housing, a second housing, and a first pivot axis, the first pivot axis is located between the first housing and the second housing, and the first pivot axis is rotationally connected with the first housing and the second housing respectively; the first housing includes the first bezel, and the second housing includes a second bezel; the second bezel includes a fifth position and a sixth position, the second bezel is coupled with the floor or has an insulating gap at the fifth position, and the second bezel is coupled with 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 part of the second bezel between the fifth position and the sixth position, and at least part of the second parasitic stub is spaced apart from the floor; based on the electronic device being in the folded state, the second parasitic stub and the first radiator at least partially overlap in a first direction, the first direction being a thickness direction of the electronic device.

[0075] With reference to the third aspect, in some implementations of the third aspect, the second parasitic stub is configured to improve a radiation efficiency of the first antenna at the first frequency band.

[0076] With reference to the third aspect, in some implementations of the third aspect, the electronic device further includes a first housing, a second housing, and a first pivot axis, the first pivot axis is located between the first housing and the second housing, and the first pivot axis is rotationally connected with the first housing and the second housing respectively; the first housing includes the first bezel, and the second housing includes a second bezel; the second bezel includes a seventh position and an eighth position, the second bezel is coupled with the floor or has an insulating gap at the seventh position, and the second bezel is coupled with 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 part of the second bezel between the seventh position and the eighth position, and at least part of the third parasitic stub is spaced apart from the floor; based on the electronic device being in the folded state, the third parasitic stub and the second radiator at least partially overlap in a first direction, the first direction being a thickness direction of the electronic device.

[0077] With reference to the third aspect, in some implementations of the third aspect, the third parasitic stub is configured to improve a radiation efficiency of the second antenna at the second frequency band.

[0078] With reference to the third aspect, in some implementations 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 rotationally connected with the first housing and the second housing respectively; the first housing includes the first bezel, and the second housing includes a second bezel; the second bezel includes a fifth position, a sixth position, a seventh position, and an eighth position arranged in sequence, the second bezel is coupled with the floor at the fifth position, the second bezel has a third insulating gap and a fourth insulating gap at the sixth position and the seventh position respectively, and the second bezel is coupled with 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 part of the second bezel between the fifth position and the sixth position, at least part of the second parasitic stub is spaced apart from the floor, the third parasitic stub includes a conductive part of the second bezel between the sixth position and the eighth position, at least 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, and the fourth element is coupled between the fifth connection point and the sixth connection point; based on the electronic device being in the folded state, the second parasitic stub and the first radiator at least partially overlap in a first direction, the third parasitic stub and the second radiator at least partially overlap in the first direction, and the first direction is a thickness direction of the electronic device.

[0079] With reference to the third aspect, in some implementations of the third aspect, the second parasitic stub is configured to improve the radiation efficiency of the first antenna in the first frequency band, and / or the third parasitic stub is configured to improve the radiation efficiency of the second antenna in the second frequency band.

[0080] With reference to the third aspect, in some implementations of the third aspect, based on the electronic device being in the 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.

[0081] With reference to the third aspect, in some implementations of the third aspect, a length L1 of the first bezel between the first position and the second position and a length L2 of the first bezel between the second position and the third position satisfy: L1 x 150% ≤ L2.

[0082] In some implementations of the third aspect, in combination with the third aspect, the first frequency band includes 1578.42±1.023MHz, the second frequency band includes 1.71GHz-1.785GHz, and / or the first frequency band includes 2.4GHz-2.4835GHz, and the second frequency band includes 2.5GHz-2.57GHz or 2.496GHz-2.69GHz.

[0083] In some implementations of the third aspect, in combination with the third aspect, the first bezel between the second position and the third position does not include a ground point. BRIEF DESCRIPTION OF DRAWINGS

[0084] FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0085] FIG. 2 is a schematic structural diagram of a foldable electronic device 100 according to an embodiment of the present application.

[0086] FIG. 3 is a schematic structural diagram of the foldable electronic device 100 in an unfolded state.

[0087] FIG. 4 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0088] FIG. 5 is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0089] FIG. 6 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0090] FIG. 7 is a schematic diagram of a structure of a common mode of an antenna and a corresponding distribution of current and electric field.

[0091] FIG. 8 is a schematic diagram of a structure of a differential mode of another antenna and a corresponding distribution of current and electric field.

[0092] FIG. 9 is a schematic diagram of a foldable electronic device 100 in an unfolded state according to an embodiment of the present application.

[0093] FIG. 10 is a schematic diagram of a foldable electronic device 100 in a folded state according to an embodiment of the present application.

[0094] FIG. 11 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0095] FIG. 12 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0096] FIG. 13 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0097] FIG. 14 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0098] FIG. 15 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0099] FIG. 16 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0100] FIG. 17 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are not provided.

[0101] FIG. 18 is a simulation result of S parameters of the first antenna and the second antenna when only the first element is provided.

[0102] FIG. 19 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are provided.

[0103] FIG. 20 is a simulation result of radiation efficiency and system efficiency of the second antenna.

[0104] FIG. 21 is a schematic diagram of current and electric field distribution of the first antenna at a resonance point (1.57 GHz) of the first resonance in the electronic device 100 shown in FIG. 16.

[0105] FIG. 22 is a schematic diagram of current and electric field distribution of the second antenna at a resonance point (1.74 GHz) of the second resonance in the electronic device 100 shown in FIG. 16.

[0106] FIG. 23 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0107] FIG. 24 is a simulation result of S parameters of the first antenna in the electronic device 100 shown in FIG. 23.

[0108] FIG. 25 is a simulation result of S parameters of the second antenna in the electronic device 100 shown in FIG. 23.

[0109] FIG. 26 is a simulation result of radiation efficiency and system efficiency of the first antenna in the electronic device 100 shown in FIG. 23.

[0110] FIG. 27 is a simulation result of radiation efficiency and system efficiency of the second antenna in the electronic device 100 shown in FIG. 23.

[0111] FIG. 28 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0112] FIG. 29 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0113] FIG. 30 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are not provided.

[0114] FIG. 31 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are disposed.

[0115] FIG. 32 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0116] FIG. 33 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0117] FIG. 34 is a schematic diagram of another electronic device 100 according to an embodiment of the present application.

[0118] FIG. 35 is a simulation result of radiation efficiency and system efficiency of the first antenna and the second antenna in the electronic device 100 shown in FIG. 34.

[0119] FIG. 36 is a simulation result of radiation efficiency and system efficiency of the second antenna in the electronic device 100 shown in FIG. 34. DETAILED DESCRIPTION

[0120] Hereinafter, terms that can appear in embodiments of the present application are explained.

[0121] It should be understood that the term "and / or" used herein is only a description of the same field of associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0122] "Within the scope of", as used in the present application, by default includes both end values of the range unless it is indicated separately that the end values are not included, for example, within the range of 1 to 5, including both 1 and 5.

[0123] Coupling: 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 of components; it can also be understood as a form of connection between different components in a circuit structure through a physical circuit that can transmit electrical signals such as copper foil or wire of a printed circuit board (PCB); "indirect coupling" can be understood as electrical conduction between two conductors through a space / without contact. In an embodiment, indirect coupling can also be referred to as capacitive coupling, for example, through the coupling between the gap between two conductive parts to form an equivalent capacitor to achieve signal transmission.

[0124] Element / device: includes at least one of lumped elements / devices, distributed elements / devices.

[0125] Lumped element / device: Refers to a collective term for elements whose size is much smaller than the wavelength relative to the frequency of the circuit. For a signal, the element characteristics remain fixed at any time, regardless of the frequency.

[0126] Distributed element / device: Unlike lumped elements, if the element size is similar to or greater than the wavelength relative to the frequency of the circuit, the characteristics of each point in the element itself will be different due to changes in the signal when the signal passes through the element. At this time, the element as a whole cannot be regarded as a single body with fixed characteristics, and should be referred to as a distributed element.

[0127] Capacitance: Can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to a component that exhibits capacitance, such as a capacitor element; distributed capacitance (or distributed capacitance) refers to an equivalent capacitance formed by two conductive parts separated by a certain gap.

[0128] Inductance: Can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to a component that exhibits inductance, such as an inductor element; distributed inductance (or distributed inductance) refers to an equivalent inductance formed by a certain length of conductive part.

[0129] Radiating body: It is a device used in an antenna to receive / send electromagnetic wave radiation. In some cases, "antenna" is understood in a narrow sense as a radiating body, which changes the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy for radiating and receiving radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiating body through the feeder, which is converted into electromagnetic wave energy of a certain polarization by the radiating body and radiated in the desired direction. The receiving radiating body converts electromagnetic wave energy of a certain polarization from a certain direction in space into modulated high-frequency current energy, which is delivered to the input end of the receiver through the feeder.

[0130] The radiator can include a conductor with a specific shape and size, such as a wire shape, or a patch shape, etc. The application does not limit the specific shape. In an embodiment, the wire shape radiator can be referred to as a wire antenna. In an embodiment, the wire shape radiator can be implemented by a conductive frame, which can also be referred to as a frame antenna. In an embodiment, the wire shape radiator can be implemented by a support conductor, which can also be referred to as a support antenna. In an embodiment, the wire diameter (e.g., including thickness and width) of the wire shape radiator, or the wire diameter of the radiator of the wire antenna, is much smaller (e.g., less than 1 / 16 of the wavelength) than the wavelength (e.g., the medium wavelength), and the length can be comparable to the wavelength (e.g., the medium 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). The main forms of the wire antenna include a dipole antenna, a half-wave vibrator antenna, a monopole antenna, a loop antenna, and an inverted F antenna (also referred to as IFA). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feed from the feed end of the radiating branch. For example, the inverted F antenna (IFA) can be regarded as being obtained by adding a ground path to a monopole antenna. The IFA antenna has a feed point and a ground point, and is called an inverted F antenna because its side view is in the shape of an inverted F. In an embodiment, the patch shape radiator can include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also referred to as PIFA). In an embodiment, the patch shape radiator can be implemented by a planar conductor (e.g., a conductive patch or a conductive coating, etc.). In an embodiment, the patch shape radiator can include a conductive patch, such as a copper patch, etc. In an embodiment, the patch shape radiator can include a conductive coating, such as silver paste, etc. The shape of the patch shape radiator includes a circular shape, a rectangular shape, a ring shape, etc. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator, and a ground plate, wherein the dielectric substrate is arranged between the radiator and the ground plate.

[0131] The radiators can also include slots or gaps formed on the conductors, such as closed or semi-closed slots or gaps formed on the ground conductor plane. In one embodiment, the radiators with slots or gaps can be referred to as slot antennas or gap antennas. In one embodiment, the slots or gaps of the slot / gap antennas have a radial dimension (e.g., including width) much smaller than the wavelength (e.g., dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and a length dimension comparable to the wavelength (e.g., dielectric wavelength) (e.g., around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiators with closed slots or gaps can be referred to as closed slot antennas. In one embodiment, the radiators with semi-closed slots or gaps (e.g., with openings added to the closed slots or gaps) can be referred to as open slot antennas. In some embodiments, the gap shape is long and thin. In some embodiments, the length of the gap is about half of the wavelength (e.g., dielectric wavelength). In some embodiments, the length of the gap is about an integer number of wavelengths (e.g., one dielectric wavelength). In some embodiments, the gap can be fed by a transmission line that is connected across one or both sides of the gap, whereby the gap is excited with a radio frequency electromagnetic field and radiates electromagnetic waves into space. In one embodiment, the radiators of the slot or gap antennas can be implemented by a conductive frame that is grounded at both ends, which can also be referred to as a frame antenna. In this embodiment, the slot or gap antenna can be considered to include a linear radiator that is spaced apart from the ground plane and grounded at both ends, thereby forming a closed or semi-closed slot or gap. In one embodiment, the radiators of the slot or gap antennas can be implemented by a bracket conductor that is grounded at both ends, which can also be referred to as a bracket antenna.

[0132] The feed circuit is a combination of all circuits for reception and transmission of radio frequency signals. The feed circuit can include a transceiver and a radio frequency front end circuit. In some cases, the term "feed circuit" is used in a narrow sense to refer to a radio frequency integrated circuit (RFIC), which can be considered to include a radio frequency front end chip and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). In general, it is considered to be part of the radio frequency.

[0133] In some embodiments, the electronic device can also include a test seat (or referred to as a radio frequency seat or a radio frequency test seat). The test seat can be used to insert a coaxial cable to test the characteristics of the radio frequency front end circuit or the radiators of the antenna through the cable. The radio frequency front end circuit can be considered to be a circuit portion coupled between the test seat and the transceiver.

[0134] In some embodiments, the radio frequency front-end circuit can be integrated as a radio frequency front-end chip in the electronic device, or the radio frequency front-end circuit and the transceiver can be integrated as a radio frequency chip in the electronic device.

[0135] 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, through one radio frequency channel in one transceiver (for example, one port (pin) of a radio frequency chip transmits signals; and can also share one radio frequency front-end circuit, for example, through a tuning circuit or an amplifier in one radio frequency front-end to process signals.

[0136] 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 seats in the electronic device.

[0137] 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 seat 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 tuning circuits and / or elements, and the tuning circuit can be an element for switching the coupling 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.

[0138] The ground structure / feeding structure can include connectors, such as metal springs, and the radiator is coupled to the ground plane through the ground structure / the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding line, and the ground structure can include a ground line.

[0139] End / point: the "end / point" of the first end / second end / feed end / ground end / feed point / ground point / connection point of the antenna radiator, which cannot be understood as the end point or end part that is physically disconnected from other radiators in a narrow sense, but can also be considered as a certain point or a certain section on the continuous radiator. In an embodiment, the "end / point" can include a connection / coupling area on the antenna radiator that is coupled to other conductive structures, for example, the feed end / feed point can be a coupling area (for example, an area that faces a part of the feed circuit) on the antenna radiator that is coupled to a feed structure or a feed circuit, and for another example, the ground end / ground point can be a connection / coupling area on the antenna radiator that is coupled to a ground structure or a ground circuit. Open end / closed end: in some embodiments, the open end and the closed end are, for example, relative to whether the ground, the closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other 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 an embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open circuit end. In an embodiment, the closed end can also be referred to as a grounded end or a short circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled to the open end to transfer coupled energy (which can be understood as transferring current).

[0140] In some embodiments, the understanding of the "closed end" can also be from the perspective of the current distribution, and the closed end or the grounded end, etc. can be understood as a current large point on the radiator, or a small point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) at the closed end can not change the current distribution characteristics of the current large point / small point of the electric field; in an embodiment, opening a slit (for example, a gap filled with insulating material) at or near the closed end can not change the current distribution characteristics of the current large point / small point of the electric field.

[0141] In some embodiments, the understanding of the "open end" can also be from the perspective of the current distribution, and the open end or the suspended end, etc. can be understood as a current small point on the radiator, or a large point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) at the open end can not change the current distribution characteristics of the current small point / large point of the electric field.

[0142] It should be understood that the radiator end at a gap (similar to the radiator at the opening of the open end or the suspended end from the structure of the radiator) coupled to electronic devices (such as capacitors, inductors, etc.) can make the radiator end a current large point / small point of the electric field, and in this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0143] The "suspended radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to a feeding line / branch and / or a grounding line / branch, but is fed and / or grounded through indirect coupling.

[0144] It should be understood that the "suspended" in the "suspended end" and the "suspended radiator" does not mean that there is no structure around the radiator to support it. In an embodiment, the suspended radiator may, for example, be a radiator arranged on the inner surface of an insulating back cover.

[0145] The current co-directional / counter-directional mentioned in the embodiments of the present application should be understood as the direction of the main current on the same side of the conductor being co-directional / counter-directional. For example, when co-directional distributed currents are excited on the conductors in a bent shape or a ring shape (for example, the current path is also bent or ring-shaped), it should be understood that, for example, the main currents excited on the conductors on both sides of a ring-shaped conductor (for example, the conductors around a gap, on both sides of the gap) are counter-directional in terms of direction, but still belong to the definition of co-directional distributed currents in the embodiments of the present application. In an embodiment, the co-directional currents on a conductor can mean that there is no reversal point of the current on the conductor. In an embodiment, the counter-directional currents on a conductor can mean that there is at least one reversal point of the current on the conductor. In an embodiment, the co-directional currents on two conductors can mean that there is no reversal point of the current on the two conductors, and the currents flow in the same direction. In an embodiment, the counter-directional currents on two conductors can mean that there is no reversal point of the current on the two conductors, and the currents flow in opposite directions. The co-directional / counter-directional currents on multiple conductors can be understood accordingly.

[0146] Resonance / resonance frequency: resonance frequency is also called resonance frequency. The resonance frequency can have a frequency range, that is, a resonance frequency range. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that, unless otherwise specified, the "first / second... resonance" mentioned in the present application refers to the fundamental mode resonance generated by the antenna / radiator, or in other words, 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 correspond to a fundamental mode resonance.

[0147] Resonance frequency band: the range of resonance frequencies is the resonance frequency band, and the return loss characteristic of any frequency point in the resonance frequency band can be less than -6 dB or -5 dB.

[0148] Communication frequency band / operating frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting B40 frequency band has an operating frequency band including frequencies within the range of 2300MHz-2400MHz, or in other words, the operating frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the operating frequency band of the antenna.

[0149] The resonant frequency band and the operating frequency band can be the same or can partially overlap. In one embodiment, one or more resonant frequency bands of an antenna can cover one or more operating frequency bands of the antenna.

[0150] Electrical length: can refer to the ratio of the physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave, and the electrical length can satisfy the following formula:

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

[0152] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. 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 frequency 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 (MHz) of the radiation signal, and the speed of light can be taken as 3x10 8 m / s. The wavelength of the radiation signal in a medium can be calculated as follows: where ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally 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 frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the wavelength can be the medium wavelength calculated using the frequency of 1955MHz. 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 frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative permittivity of the medium filled on one side or more sides of the radiator.

[0154] Total efficiency of antenna system: refers to the ratio of input power to output power at the port of the antenna.

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

[0156] As can be understood by those skilled in the art, efficiency is generally expressed in percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is represented.

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

[0158] The antenna return loss can be represented by the S11 parameter, which belongs to one of the S parameters. S11 represents the reflection coefficient, and this parameter can represent the advantages and disadvantages of the antenna transmission efficiency. S11 parameter is usually negative, and 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 entering 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, -6 dB is generally taken as the standard for S11 value. 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 radiation pattern. It refers to the pattern of the relative field strength (normalized modulus) of the antenna radiation field changing with direction at a certain distance (far field) from the antenna. It is usually represented by two mutually perpendicular plane patterns through the maximum radiation direction of the antenna.

[0161] The antenna pattern usually has multiple radiation beams. The radiation beam with the maximum radiation intensity is called the main lobe, and the remaining radiation beams are called side lobes or side lobes. In the side lobe, the side lobe in the opposite direction of 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 pattern at a certain distance from the antenna (far field), which is a dimensionless ratio greater than or equal to 1. It can be used to indicate the energy radiation characteristics of the antenna. The greater the directivity, the more energy the antenna radiates in a certain direction, and the more concentrated the energy radiation is.

[0163] Antenna gain: used to characterize the degree of concentration of input power radiated by the antenna. Generally, the narrower the main lobe of the antenna pattern, the smaller the side lobe, and the higher the antenna gain.

[0164] Polarization direction of the antenna: at a given point in space, the electric field intensity E (vector) is a function of time t, and as time goes on, the vector end point periodically traces a trajectory in space. The trajectory is a straight line and perpendicular to the ground, which is called vertical polarization, or horizontal to the ground, which is called horizontal polarization. The trajectory is an ellipse or a circle, and when viewed along the propagation direction, it rotates in the right-hand or clockwise direction with time, which is called right-hand circular polarization (RHCP), or rotates in the left-hand or counterclockwise direction with time, which is called left-hand circular polarization (LHCP).

[0165] Ground (GND): can refer to at least a part of any ground layer, or ground plate, or ground metal layer, etc. in an electronic device (such as a mobile phone), or at least a part of any combination of the above ground layer, or ground plate, or ground component, etc. "Ground" can be used for the grounding of components in an electronic device. In one embodiment, "ground" can be a ground layer of a circuit board of an electronic device, or a ground plate formed by a middle frame of an electronic device, or a ground metal layer formed by a metal film under a 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 elements separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a wiring layer, and the wiring layer and the ground layer are electrically connected by a via. In one embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to the circuit board; or electrically connected to the wiring layer and / or the ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0166] Any of the above ground planes, or ground planes, or ground metal planes are made of conductive material. In one embodiment, the conductive material can be any of the following: 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, graphite powder impregnated cloth, graphite coated substrate, copper plated substrate, brass plated substrate, and aluminum plated substrate. Those skilled in the art will appreciate that the ground planes / ground planes / ground metal planes can also be made of other conductive materials.

[0167] Grounded: refers to coupling to the above ground / ground plane in any way. In one embodiment, the grounding can be through physical grounding, such as physical grounding of a specific position on the bezel through part of the structure of the middle frame (or referred to as physical ground). In one embodiment, the grounding can be through device grounding, such as device grounding through capacitors / inductors / resistors in series or parallel (or referred to as device ground).

[0168] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

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

[0170] Among them, the cover 13 can be arranged close to the display module 15, and can be mainly used for protecting and dustproofing the display module 15.

[0171] In one embodiment, the display module 15 can include a liquid crystal display (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 role of supporting the whole machine. In FIG. 1, the PCB 17 is arranged between the middle frame 19 and the back cover 21. It should be understood that, in an embodiment, the PCB 17 can also be arranged between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. The printed circuit board PCB 17 can adopt a medium plate of a flame-resistant material (FR-4), can also adopt a Rogers medium plate, and can also adopt a hybrid medium plate of Rogers and FR-4, and the like. Here, FR-4 is a code of a flame-resistant material grade, and the Rogers medium plate is a high-frequency plate. The PCB 17 carries elements such as a radio frequency chip. In an embodiment, a metal layer can be arranged on the printed circuit board PCB 17. The metal layer can be used for grounding of the elements carried on the printed circuit board PCB 17, and can also be used for grounding of other elements such as a bracket antenna and a frame antenna. The metal layer can be referred to as a ground plate, or a grounding plate, or a grounding layer. In an embodiment, the metal layer can be formed by etching metal on a surface of any one layer of medium plates in the PCB 17. In an embodiment, the metal layer for grounding can be arranged on one side of the printed circuit board PCB 17 close to the middle frame 19. In an embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of the grounding layer thereof. In an embodiment, the metal middle frame 19 can also be used for grounding of the above-mentioned elements. The electronic device 100 can also have other ground plates / grounding plates / grounding layers, and details are not described herein again.

[0173] Due to the compactness inside the electronic device, the ground plates / grounding plates / grounding layers are usually arranged in the internal space of 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, and the like can all be regarded as part of the ground plate). In an embodiment, the filling medium between the frame and the ground plate can be simply regarded as the length and width of the rectangle surrounded by the contour of the inner surface of the filling medium; or can be regarded as the length and width of the rectangle surrounded by the contour of all conductive parts inside the frame.

[0174] The electronic device 100 can also include a battery (not shown in the figure). The battery can be arranged between the middle frame 19 and the back cover 21, or can be arranged 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 arranged between the main board and the sub-board. The main board can be arranged between the upper edge of the middle frame 19 and the battery, and the sub-board can be arranged between the lower edge of the middle frame 19 and the battery.

[0175] The electronic device 100 can further include a bezel 11, which can include a conductive material such as metal. The bezel 11 can be disposed between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 100. The bezel 11 can have four side edges that surround the display module 15, helping to secure the display module 15.

[0176] In an implementation, the bezel 11 mainly including a conductive material can be referred to as a conductive bezel or a metal bezel of the electronic device 100, which is suitable for an industrial design (ID) of a metal appearance. In an implementation, the outer surface of the bezel 11 is mainly of a conductive material such as a metal material, thereby forming an appearance of a metal bezel. In these implementations, the conductive portion of the bezel 11 including the outer surface can be used as an antenna radiator of the electronic device 100 and is generally referred to as a bezel antenna.

[0177] In another implementation, the outer surface of the bezel 11 is mainly of a non-conductive material such as plastic, forming an appearance of a non-metal bezel, which is suitable for a non-metal ID. In an implementation, the inner surface of the bezel 11 can include a conductive material such as a metal material. In this implementation, the conductive portion of the inner surface of the bezel 11 can be used as an antenna radiator of the electronic device 100. It should be understood that the radiator disposed on the inner surface of the bezel 11 (or the conductive material of the inner surface) can be disposed against the non-conductive material of the bezel 11 to minimize the volume occupied by the radiator and be closer to the outside of the electronic device 100 to achieve better signal transmission, and can also be referred to as a bezel antenna. It should be noted that the radiator disposed against the non-conductive material of the bezel 11 means that the radiator can be disposed against the inner surface of the non-conductive material, can be embedded in the non-conductive material, or can be disposed close to the inner surface of the non-conductive material, for example, the radiator and the inner surface of the non-conductive material can have a small gap therebetween. It should be understood that the conductive material and the non-conductive material can both be considered as part of the bezel 11.

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

[0179] The middle frame 19 can include the frame 11, and the middle frame 19 including the frame 11 can serve as a support for the electronic devices in the entire machine. The cover plate 13 and the back cover 21 are respectively attached along the upper and lower edges of the frame to form a housing of the electronic device. In an embodiment, the cover plate 13, the back cover 21, the frame 11, and / or the middle frame 19 can be collectively referred to as the housing of the electronic device 100. It should be understood that the "housing" can be used to refer to part or all of any one of the cover plate 13, the back cover 21, the frame 11, or the middle frame 19, or part or all of any combination of the cover plate 13, the back 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 radio frequency signals, and a gap can exist between the portion of the frame that serves as the radiator and other portions of the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment. In an embodiment, the middle frame 19 can be provided with an aperture at the portion of the frame that serves as the radiator to facilitate the radiation of the antenna.

[0181] Alternatively, the frame 11 can not be considered as part of the middle frame 19. In an embodiment, the frame 11 can be connected to and integrally formed with the middle frame 19. In another embodiment, the frame 11 can include a protruding member that extends inward to be connected to the middle frame 19, for example, by a spring, a screw, welding, or the like. The protruding member of the frame 11 can also be used to receive a feed signal, so that at least a portion of the frame 11 serves as an antenna radiator to receive / transmit radio frequency signals. A gap can exist between the portion of the frame that serves as the radiator and the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment, so that the antenna has a good signal transmission function.

[0182] The back cover 21 can be made of a metal material, or a non-conductive material such as a glass back cover, a plastic back cover, or a non-metal back cover. In an embodiment, the back cover 21 made of a conductive material can replace the middle frame 19 and be integrated with the bezel 11 as a whole to support the electronic devices in the whole machine.

[0183] In an embodiment, the conductive part in the middle frame 19 and / or the back cover 21 can serve as a reference ground of the electronic device 100, and the bezel 11, the PCB 17, and the like 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 in the housing, such as a bracket antenna, a millimeter wave antenna, and the like (not shown in FIG. 1). The clearance of the antenna arranged in the housing can be obtained by a slot or an aperture on any one of the middle frame, the bezel, the back cover, and the display screen, or a non-conductive gap or aperture formed between any two of them, and 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 the non-conductive area. In an embodiment, the antenna 40 can be in the form of a flexible printed circuit (FPC) based antenna, a laser-direct-structuring (LDS) based antenna, or a microstrip disk antenna (MDA), and the like. In an embodiment, the antenna can also be a transparent structure embedded in the screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded in the screen of the electronic device 100.

[0185] FIG. 2 is a structural schematic diagram of a foldable electronic device 100 according to an embodiment of the present application. The foldable electronic device 100 can be a mobile phone, a tablet computer, an e-book, a notebook computer, a wearable device such as a watch, or the like. The embodiment shown in FIG. 2 takes a foldable mobile phone as an example for illustration.

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

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

[0188] The flexible display 110 can be schematically represented by filling a dot matrix pattern in FIG. 2. The flexible display 110 can have a strong flexibility and a bendable characteristic, and can provide a new interaction method based on the bendable characteristic to a user.

[0189] The flexible display 110 can include a first display portion 111 corresponding to the first housing 126, a second display portion 112 corresponding to the second housing 127, and a foldable display portion 113 corresponding to the hinge 125. The foldable display portion 113 can be connected between the first display portion 111 and the second display portion 112.

[0190] The first bezel 121 can surround an outer periphery of the first cover 122, and at least a portion of the first bezel 121 can also surround an outer periphery of the first display portion 111. The first display portion 111 can be disposed in parallel with the first cover 122 with a space therebetween, and the first display portion 111 and the first cover 122 can be located on both sides of the first bezel 121. The space between the first display portion 111 and the first cover 122 can be used to dispose components of the foldable electronic device 100, such as an antenna, a circuit board assembly, or the like.

[0191] The second bezel 123 can surround an outer periphery of the second cover 124, and at least a portion of the second bezel 123 can also surround an outer periphery of the second display portion 112. The second display portion 112 can be disposed in parallel with the second cover 124 with a space therebetween, and the second display portion 112 and the second cover 124 can be located on both sides of the second bezel 123. The space between the second display portion 112 and the second cover 124 can be used to dispose components of the foldable electronic device 100, such as an antenna, a circuit board assembly, or the like.

[0192] In an embodiment provided by the present application, the cover and the frame can be two parts of the housing of the foldable electronic device 100. The cover and the frame can be connected, and the connection can not be in the form of assembly such as clamping, sticking, welding, riveting, clearance fit, etc. The connection relationship between the cover and the frame is usually difficult to be divided. In another embodiment provided by the present application, the cover and the frame can be two different components. By assembling the cover 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 move close to or away from each other. Correspondingly, the first display part 111 of the flexible display screen 110 and the second display part 112 of the flexible display screen 110 can move close to or 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 a main shaft, a first connecting component, and a second connecting component, for example. The first connecting component can be fixed with the first cover 122, and the second connecting component can be fixed with the second cover 124. The first connecting component and the second connecting component can rotate relative to the main shaft. Through the mutual movement of the first connecting component and the second connecting component, the mutual movement of the first housing 126 and the second housing 127 can be driven, and the opening and closing function of the foldable electronic device 100 can be realized.

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

[0196] In the unfolded state, the angle between the first display part 111 corresponding to the first housing 126 and the second display part 112 corresponding to the second housing 127 can be 180°. Due to possible errors in engineering implementation, when the angle between the first display part 111 and the second display part 112 is between 170° and 190°, it can be considered that the flexible display screen 110 is in the unfolded state.

[0197] FIG. 3 shows a possible folded state of the foldable electronic device 100. In FIG. 3, an outward folding state of the foldable electronic device 100 is shown (the outward folding state can be referred to as an outward folding state). The outward folding state shown in FIG. 3 can be a left-right outward folding state or an up-down outward folding state, for example. The possible folded state of the foldable electronic device 100 will be described below with reference to FIGS. 2 and 3.

[0198] In the embodiments of the present application, the foldable electronic device 100 in the folded state can 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 can be approximately parallel, spaced apart from each other, and arranged face to face, and the interval distance between the first cover 122 and the second cover 124 is the smallest, and at least part of the first housing 126 and the second housing 127 is accommodated in the space surrounded by the flexible display 110; the first display 111, the first housing 126, the second housing 127, and the second display 112 are sequentially stacked. Similarly, the first display 111 and the second display 112 can be approximately parallel and spaced apart from each other, and the interval distance between the first cover 122 and the second cover 124 is smaller than the interval distance between the first display 111 and the second display 112. At this time, the first display 111 and the second display 112 can be regarded as being located on different planes.

[0199] In combination with FIGS. 2 and 3, when the foldable electronic device 100 is in the outer folded state, the first cover 122 and the second cover 124 can be close to each other, and the first display 111 and the second display 112 can be close to each other. The first display 111, the second display 112, and the foldable display 113 can form a housing area for accommodating the first cover 122, the second cover 124, and the hinge 125. That is, the first cover 122, the second cover 124, and the hinge 125 can be accommodated in the interval space between the first display 111 and the second display 112.

[0200] It should be understood that the foldable electronic device 100 can be folded inwardly (the inwardly folded state can be referred to as the inner folded state). When the foldable electronic device 100 is in the inner folded state, the first cover 122 and the second cover 124 can be close to each other, and the first display 111 and the second display 112 can be close to each other. The first cover 122, the second cover 124, and the hinge 125 can form a housing area for accommodating the first display 111, the second display 112, and the foldable display 113. That is, the first display 111, the second display 112, and the foldable display 113 can be accommodated in the interval 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 foldable electronic device 100 has a relatively small footprint; 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 viewable range of the user. It should be understood that the folded state includes a closed state, in which the foldable electronic device 100 has the smallest footprint; the unfolded state includes a flat state, in which the foldable electronic device 100 has the largest footprint.

[0202] The foldable electronic device 100 can further include a third housing 128 and a hinge 129, as shown in FIG. 4. The hinge 129 can be connected between the third housing 128 and the second housing 127. The third housing 128 and the second housing 127 can move closer to or farther away from each other. As the number of foldable parts of the foldable electronic device 100 increases, the footprint of the foldable electronic device 100 can be further reduced in the folded state, while keeping the screen size the same in the unfolded state.

[0203] In the foldable electronic device 100 shown in FIG. 4, since there are three foldable parts (the first housing 126, the second housing 127, and the third housing 128), the foldable electronic device 100 has at least three forms: 1, an unfolded state; 2, a folded state; and 3, a partially unfolded state.

[0204] 1. As shown in FIG. 4, 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 about 180°. The flexible display 110 can be in the unfolded state.

[0205] 2. As shown in FIG. 5, it is a possible folded state (three-folded state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the hinge 125, and the second housing 127 and the third housing 128 rotate along the hinge 129, so that the foldable electronic device 100 has the maximum degree of bending. At this time, the first housing 126, the second housing 127, and the third housing 128 can be considered to be located on different planes.

[0206] It should be understood that, for the sake of brevity of discussion, the folded state of the foldable electronic device 100 in the structure shown in FIG. 5 is S-fold (the side of the foldable electronic device 100 is in the shape of S, and the second housing 127 is located between the first housing 126 and the third housing 128). In an embodiment, the folded state of the foldable electronic device 100 can also be G-fold (the side of the foldable electronic device 100 is in the shape of G, 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 shown in FIG. 6, it is a possible partial unfolded state (two-fold state) of the foldable electronic device 100. In the partial unfolded state, the angle between the first housing 126 and the second housing 127 can be about 180°, and the second housing 127 and the third housing 128 are rotated along the rotation axis 129, so that the third housing 128 approaches the second housing 127. At this time, the first housing 126 and the second housing 127 are considered to be located on the same plane, and the second housing 127 and the third housing 128 can be considered to be located on different planes. In another possible partial unfolded state, the angle between the third housing 128 and the second housing 127 can be about 180°, and the first housing 126 and the second housing 127 are rotated along the rotation axis 125, so that the first housing 126 approaches the second housing 127.

[0208] FIGS. 1 and 2 only schematically show some components included in the electronic device 10 and the foldable electronic device 100, and the actual shape, actual size and actual structure of these components are not limited by the above-mentioned drawings.

[0209] It should be understood that, in the embodiments of the present application, the face where the display screen of the electronic device is located can be considered as the front face, the face where the back cover is located can be considered as the back face, and the face where the frame is located can be considered as the side face.

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

[0211] Firstly, FIGS. 7 and 8 are introduced to describe two antenna modes involved in the present application. FIG. 7 is a structure of a common mode of an antenna provided by the present application and the corresponding distribution of current and electric field. FIG. 8 is a structure of a differential mode of another antenna provided by the present application and the corresponding distribution of current and electric field. The antenna radiator in FIGS. 7 and 8 is open at both ends, and the common mode and the differential mode thereof can be respectively referred to as a line common mode and a line differential mode.

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

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

[0214] 1. Wire common mode (CM) mode

[0215] Figure 7(a) shows that the radiator of the antenna 40 is open at both ends, and the feeding circuit (not shown in the figure) is connected at the middle position 41 of the antenna 40. In an embodiment, the feeding form of the antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of the antenna 40 through the feeding line 42. It should be understood that the symmetrical feed can be understood as that one end of the feeding circuit is connected to the radiator, and the other end is coupled to the ground plane to realize grounding, wherein the connection point (feeding point) of the feeding circuit and the radiator is located at the center of the radiator, which can be the geometric center, or the electrical length center (or the region within a certain range near the above-mentioned center).

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

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

[0218] The current is stronger at the middle position 41 of the antenna 40 (the current lumps are located near the middle position 41 of the antenna 40), and weaker at the two ends of the antenna 40, as shown in (b) of FIG. 7. The electric field is weaker at the middle position 41 of the antenna 40, and stronger at the two ends of the antenna 40.

[0219] 2. Line differential mode (DM) mode

[0220] As shown in (a) of FIG. 8, the two ends of the two radiators of the antenna 50 are open ends, and the middle position 51 is connected to the feeding circuit. In an 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 the feeding line 52, and the other end of the feeding circuit is connected to the other radiator through the feeding line 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the two radiators.

[0221] It should be understood that the "center anti-symmetrical feeding" mentioned in the present application can be understood as that the positive and negative poles of the feeding unit are connected to the two connection points near the above-mentioned midpoint of the radiator. In an 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 phases are opposite by 180°±10°.

[0222] (b) of FIG. 8 shows the current and electric field distribution of the antenna 50. As shown in (b) of FIG. 8, the current presents a same direction distribution, for example, an anti-symmetrical distribution, on both sides of the middle position 51 of the antenna 50, and the electric field presents an opposite direction distribution on both sides of the middle position 51. As shown in (b) of FIG. 8, the current at the feeding line 52 presents an opposite direction distribution. Based on the opposite direction distribution of the current at the feeding line 52, the feeding shown in (a) of FIG. 8 can be called a line DM feeding. Based on the same direction distribution of the current on both sides of the connection between the radiator and the feeding line 52, the antenna mode shown in (b) of FIG. 8 can be called a line DM mode (which can also be simply referred to as a DM mode, for example, for a line antenna, the DM mode refers to the line DM mode). The current and electric field shown in (b) of FIG. 8 can be called the current and electric field of the line DM mode respectively. It should be understood that based on the same direction distribution of the current on both sides of the connection between the radiator and the feeding line 52, the antenna mode shown in (b) of FIG. 8 can also be called a half antenna mode, or a half wavelength mode, or simply a half mode.

[0223] In an 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 lumps are located near the middle position 51 of the antenna 50), and weaker at the two ends of the antenna 50, as shown in (b) of FIG. 8. The electric field is weaker at the middle position 51 of the antenna 50, and stronger at the two ends of the line antenna 50.

[0224] It should be understood that for the antenna radiator, which can be understood as a metal structure that generates radiation, the number thereof can be one, as shown in FIG. 7, or two, as shown in FIG. 8, which can be adjusted according to actual design or production needs. For example, for the line CM mode, two radiators can also be used as shown in FIG. 8, the two ends of the two radiators are oppositely arranged and spaced apart by a gap, and a symmetric feeding mode is used at the two ends close to each other, for example, the same feed signal is fed into the two ends close to each other of the two radiators, respectively, and similar effects to the antenna structure shown in FIG. 7 can also be obtained. Correspondingly, for the line DM mode, one radiator can also be used as shown in FIG. 7, two feed points are arranged at the middle position of the radiator and an anti-symmetric feeding mode is used, for example, signals with the same amplitude and opposite phase are fed into the two symmetric feed points on the radiator, respectively, and similar effects to the antenna structure shown in FIG. 8 can also be obtained.

[0225] 3. Line CM-DM mode

[0226] FIGS. 7 and 8 respectively show that when the two ends of the radiator are open, different feeding modes are used to generate line CM mode and line DM mode, respectively.

[0227] When the feeding form of the antenna is asymmetric feeding (the feed point deviates from the middle position of the radiator, including edge feeding or offset feeding), or the ground point (coupled to the floor) of the radiator is asymmetric (the ground point deviates from the middle position of the radiator), the antenna can simultaneously generate a first resonance and a second resonance, corresponding to line CM mode and line DM mode, respectively. For example, the first resonance corresponds to line CM mode, and the current and electric field distribution is shown in FIG. 7(b). The second resonance corresponds to line DM mode, and the current and electric field distribution is shown in FIG. 8(b).

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

[0229] It should be understood that for the sake of brevity of the 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 rotationally connected with the rotation shaft 203.

[0230] As shown in FIG. 9, the first housing 201 includes a first bezel 210. The second housing 202 includes a second bezel 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. The antenna 301 and the antenna 302 each include a parasitic branch 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 the folded state, the parasitic branch 311 and the radiator 320 at least partially overlap in the first direction, as shown in FIG. 10. Here, the first direction is the thickness direction of the electronic device 100, or it can also be the direction (for example, the x direction) perpendicular to the display screen when the electronic device 100 is in the unfolded state.

[0234] It should be understood that when the parasitic branch 311 is not arranged (the first frame 210 is coupled to the floor 300 at the second position 212 and the third position 213) when the electronic device 100 is in the folded state, due to the 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 (for example, bandwidth, efficiency, etc.) of the antenna 301 and the antenna 302, the parasitic branch 311 is arranged near the radiator 310 and the radiator 320. However, when the electronic device 100 is in the folded state, the radiator 310 and the radiator 320 can both cause the parasitic branch 311 to be coupled to generate a same-direction current (the current between the second position 212 and the third position 213 is in the same direction). Because the radiator 310 and the radiator 320 can both generate this same-direction current, the coupling between the radiator 310 and the radiator 320 is enhanced, and the isolation between the antenna 301 and the antenna 302 is deteriorated.

[0236] Embodiments of the present application provide an electronic device, which includes a first antenna and a second antenna. The first antenna has a first radiator formed by a conductive part of a frame of a first housing. The second antenna has a second radiator formed by a conductive part of a frame of a second housing. The first antenna and the second antenna can both improve the antenna radiation characteristics through a parasitic branch. 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 simultaneously to improve the communication performance of the electronic device.

[0237] FIG. 11 is a schematic diagram of an electronic device 100 according to 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 the structure of the region related to the embodiments of the present application is shown. In actual production or design, other regions can be adjusted. For example, the bezel (for example, the first bezel or the second bezel) has multiple insulating gaps or is coupled to the ground plate at multiple points to form a radiator or a parasitic branch of another antenna, and the embodiments of the present application do not limit this.

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

[0240] The first housing 201 includes a first bezel 210, and at least a portion of the first bezel 210 is spaced apart from the ground plate 300. The second housing 202 includes a second bezel 220, and at least a portion of the second bezel 220 is spaced apart from the ground plate 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 an embodiment, the ground plate 300 can include a first portion and a second portion, the first portion can be located in the first housing 201, and the second portion can be located in the second housing 202. The first portion and the second portion can be connected by the first rotating shaft 203.

[0242] It should be understood that in the electronic device 100 shown in FIG. 11, the electronic device 100 is a foldable electronic device, and 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 case that 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 an embodiment, the electronic device 100 can 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 bezel 210 includes a first position 211, a second position 212, and a third position 213, which are sequentially arranged. The first bezel 210 has a first insulating gap and a second insulating gap at the second position 212 and the third position 213, respectively. The first bezel 210 is coupled to or has an insulating gap with the floor 300 at the first position 211.

[0244] The second bezel 220 includes a fourth position 214 and a fifth position 215. The second bezel 220 has a third insulating gap with the floor 300 at the fourth position 214. The second bezel 220 is coupled to or has an insulating gap with the floor 300 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 feed circuit 411. The first radiator 410 includes a conductive portion of the first bezel 210 between the first position 211 and the 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 feed point 412. The first feed circuit 411 is coupled to the first feed point 412 and feeds a radio frequency signal of a first frequency band.

[0246] The second antenna 402 includes a second radiator 420 and a second feed circuit 421. The second radiator 420 includes a conductive portion of the second bezel 220 between the fourth position 214 and the 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 feed point 422. The second feed circuit 421 is coupled to the second feed point 422 and feeds a radio frequency signal of a second frequency band.

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

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

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

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

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

[0252] When the electronic device 100 is in the folded state, the parasitic branch 430 and the second radiator 420 at least partially overlap in a first direction, as shown in FIG. 12. Here, 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, for example, the x direction.

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

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

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

[0256] The parasitic branch 430 includes a first connection point 431 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 floor 300. In an 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 an 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 an embodiment, the operating frequency band of the first antenna 401 and the operating frequency band of 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 the LTE. Alternatively, 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 the bluetooth (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 the LTE.

[0260] It should be understood that, in the above embodiments, only the parts of the communication frequency bands that can be included in the first frequency band and the second frequency band are exemplified, and other communication frequency bands can also be included in actual production or design, which is not limited in the embodiments of the present application.

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

[0262] In the first frequency band, the first element 441 is coupled between the first connection point 431 of the parasitic branch 430 and the ground plane 300, so that the parasitic branch 430 can additionally generate a second current path. In the second current path, the currents on the parasitic branch 430 on both sides of the first connection point 431 are opposite.

[0263] Therefore, the current in the first current path and the current in the second path are partially opposite, and the current in the second path can offset part of the current in the first path, so as to weaken the coupling between the first radiator 410 and the second radiator 420, and improve the isolation between the first antenna 401 and the second antenna 402.

[0264] And, 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, and the inductive element has the characteristics of low-pass high-resistance, the additional current path generated by the second antenna 402 (the second feed point 422 feeds the radio frequency signal) on the parasitic branch 430 is weak and does not have a great impact on the original current path, and the parasitic branch 430 can be used to improve the radiation characteristics (for example, radiation efficiency) of the second antenna 402.

[0265] In one embodiment, the parasitic branch 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 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.

[0266] Correspondingly, when the boundary conditions of the parasitic branch 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 branch 430 is less than the electrical length of the second radiator 420.

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

[0268] In one embodiment, the first parasitic resonance can be used to improve the radiation characteristics (for example, 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 of 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, the current on the parasitic branch 430 in the first current path generated by the first antenna 401 coupling on the parasitic branch 430 and the current path generated by the second antenna 402 coupling on the parasitic branch 430 are in the same direction, and this same direction current can be used to improve the radiation characteristics (for example, radiation efficiency) of the antenna.

[0270] At the resonance point of the second parasitic resonance, the current on the parasitic branch 430 includes a partial reverse current in the second current path generated by the coupling of the first antenna 401 on the parasitic branch 430, and the current in the second current path can offset part of the current in the first current path, so as to weaken the overall current generated by the coupling of the first antenna 401 on the parasitic branch 430 (due to the weakening of the overall current, the first parasitic resonance has less impact on the radiation characteristics of the first antenna 401), and further weaken the coupling between the first radiator 410 and the second radiator 420, and improve the isolation between the first antenna 401 and the second antenna 402.

[0271] Therefore, in the electronic device 100 shown in FIG. 11, the parasitic branch 430 is mainly used to improve the radiation characteristics (for example, the 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 the resonance point of the second parasitic resonance is closer to the low frequency than the resonance point of the first resonance. 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 current in the second current path has a better offset effect on the current in the first current path, and the first antenna 401 and the second antenna 402 have better isolation. And, the first antenna 401 will not produce a notch in the radiation efficiency in the first frequency band due to the proximity of the second parasitic resonance to the first resonance, and the radiation characteristics (for example, the radiation efficiency) of the first antenna 401 in the first frequency band will not be reduced.

[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, the second antenna 402 will not produce a notch in the radiation efficiency in the second frequency band due to the proximity of the first parasitic resonance to the second resonance, and the second antenna 402 can have better radiation characteristics (for example, the radiation efficiency) in the second frequency band.

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

[0277] It should be understood that as the length of the parasitic branch 430 increases, the radiation characteristics of the antenna (the first antenna 401 or the second antenna 402) are more likely to be improved.

[0278] In an embodiment, the first connection point 431 is disposed on the side of the parasitic branch 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 branch 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 branch 430 between the first connection point 431 and the third position 213).

[0279] It should be understood that when the first connection point 431 is disposed on the side of the parasitic branch 430 away from the first radiator 410, the current between the first current path and the second current path that counteracts each other can be increased, and the coupling between the first radiator 410 and the second radiator 420 is further reduced, and the isolation between the first antenna 401 and the second antenna 402 is improved.

[0280] In an embodiment, the first connection point 431 can be located in a first current large point region of the parasitic branch 430 between the second position 212 and the third position 213. The first current large point region is generated by the coupling of the second antenna 402.

[0281] It should be understood that the first current large point region generated by the coupling of the second antenna 402 can be understood as the region where the current large point of the current path coupled by the second antenna 402 is located. Since the current corresponds to the electric field, the current large point can also be understood as an electric field zero point (the electric field on both sides of the electric field zero point is reversed). In the embodiment of the present application, the current large point region can be understood as a region within 5 mm from the current maximum point, or a 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 improvement of the radiation characteristics of the parasitic branch 430 on the second antenna 402 is greater.

[0283] In an embodiment, the equivalent inductance value of the first element 441 can be determined according to the frequency of the actual first frequency band. In an 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 an embodiment, the first element 441 can be a 0 ohm resistor.

[0285] In one embodiment, the electronic device 100 further comprises a second element 442. The parasitic branch 430 comprises 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 embodiments of the present application, part of the current path generated by the second antenna 402 flows 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, and the capacitive element has the characteristics of high-pass and low resistance. At the parasitic branch 430, the current path generated by the first antenna 401 is not affected near the second connection point 432, and the parasitic branch 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 branch 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 branch 430 between the center and the second position 212) and the distance between the center and the third position 213 (the length of the parasitic branch 430 between the center and the third position 213) are the same.

[0289] In one embodiment, the side of the parasitic branch 430 away from the first radiator 410 comprises the above-mentioned first connection point 431. The side of the parasitic branch 430 close to the first radiator 410 comprises 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 branch 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 branch 430 between the second connection point 432 and the third position 213).

[0290] In one embodiment, the second connection point 432 can be located in a second current large point region of the parasitic branch 430 between the second position 212 and the third position 213. The second current large point region is generated by the coupling of the first antenna 401.

[0291] It should be understood that the above-mentioned second current large point region generated by the first antenna 401 can be understood as the region where the current large point in the current path generated by the coupling of the first antenna 401 on the parasitic branch 430 is located.

[0292] When the second connection point 432 is located in the second current maximum point area, the second element 442 has less influence on the first antenna 401, and the parasitic branch 430 can have greater improvement on the radiation characteristics of the first antenna 401.

[0293] In an embodiment, the equivalent capacitance value of the second element 442 can be determined according to the frequency of the actual second frequency band. In an 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 an 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, for example, an antenna conforming to a composite right and left hand (CRLH) transmission line structure.

[0296] When the first radiator 410 forms a structure similar to an inverted F antenna, the first feed point 412 is close to the ground end, and the distance between the first feed point 412 and the ground end (the length of the first radiator 410 between the first feed 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 feed point 412 is close to the open end, and the distance between the first feed point 412 and the ground end (the length of the first radiator 410 between the first feed 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 feed point 412 is close to the open end, it is beneficial to realize the miniaturization of the first radiator 410. The coupling between the first feed circuit 411 and the first feed point 412 is by capacitance, to better excite the first radiator 410.

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

[0299] In an 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 about one quarter of the first wavelength.

[0300] The first wavelength can be understood as a vacuum wavelength corresponding to a resonance point frequency of the first resonance generated by the first radiator 410, or can also be understood as a vacuum wavelength corresponding to a center frequency of a 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, and the above vacuum wavelengths can also be converted into dielectric wavelengths due to the conversion relationship between dielectric wavelengths and vacuum wavelengths. For the sake of simplicity of the discussion, the wavelengths described in the embodiments of the present application can be understood accordingly.

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

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

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

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

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

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

[0308] In one embodiment, 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 the electronic device 100 being at least partially overlapped in a direction perpendicular to the thickness direction of the electronic device 100 (for example, in an unfolded state, in a direction perpendicular to the display screen) in a folded state. In one embodiment, the second radiator 420 (the second radiator 420 between the fourth position 214 and the fifth position 215) can also include a grounding point, and the second radiator 420 (the second frame 220) is coupled to the ground plate 300 at the grounding point.

[0310] It should be understood that when the grounding point is not disposed between the fourth position 214 and the fifth position 215, the second radiator 420 can generate the second resonance by the line DM mode in the above-mentioned embodiment. When the grounding point is disposed between the fourth position 214 and the fifth position 215, the second radiator 420 can generate the third resonance by the line CM mode in the above-mentioned 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) and 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) are different.

[0312] It should be understood that when the grounding point is not located at the center of the second radiator 420, the second radiator 420 generates the third resonance by the line CM mode can also be coupled on the parasitic branch 430 to generate a same-direction current for improving the radiation characteristics (for example, the radiation efficiency) of the second antenna 402.

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

[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 about a quarter of the first wavelength.

[0316] In one embodiment, both ends of the parasitic branch 430 are open ends, forming an antenna structure similar to a dipole, and the parasitic branch 430 operates in a half-wavelength mode. The parasitic branch 430 can generate a parasitic resonance by the line DM mode in the above-mentioned 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 are located between the second position 212 and the third position 213, only the first frame 210 needs to have the first insulating gap and the second insulating gap at the second position 212 and the third position 213, and the embodiments of the present application do not limit the structure formed by the first radiator 410, the second radiator 420 and the parasitic branch 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 branch 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 ground point.

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

[0320] In one embodiment, the second frame 220 can further include a sixth position 216, and the fifth position 215 is located between the sixth position 216 and the fourth position 214, as shown in FIG. 14. 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 ground plate 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 shown in FIG. 14.

[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. The two ends of the second radiator 420 are both open ends, and the second radiator 420 operates in a half-wavelength mode.

[0323] In the foldable electronic device 100 shown in FIG. 14, the second radiator 420 has a structure with one end as a ground end and the other end as an open end. Moreover, the fourth insulating gap of the second radiator 420 can be regarded as an equivalent capacitance (e.g., a distributed capacitance) provided on the second radiator 420, which can make the second radiator 420 form a meta material structure. The second radiator 420 with the meta material structure can increase the radiation aperture, and the electric field is more dispersed after the fourth insulating gap. In one embodiment, the dielectric loss near the second radiator 420 forming the meta material structure is reduced, and thus 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, and by the fourth insulating gap, the electrical length of the second radiator 420 can be greater than three-eighths of the first wavelength, and the current on the second radiator 420 is co-directional (for example, does not reverse). The electrical length of the second radiator 420 is increased from one-quarter 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 caused by the second radiator 420 and the conductors and dielectric 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] Wherein, the first wavelength can be understood as the wavelength of the medium corresponding to the resonance point frequency of the second resonance generated by the second radiator 420, or can also be understood as the wavelength of the medium 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, the above ratio can be converted to the vacuum wavelength, which will not be described one by one.

[0328] In one embodiment, the second radiator 420 can 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. The third element 443 is coupled and connected between the third connection point 433 and the fourth connection point 434.

[0329] It should be understood that by coupling and connecting the third element 443 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 (for example, the resonance point frequency of the second resonance generated by the second radiator 420) of the second antenna 402.

[0330] In one embodiment, the length of the second radiator 420 between the first end (ground end, one 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, one 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 above-mentioned conductor between one end of the second radiator 420 and the fourth insulating gap can be understood as the length of the conductor portion between the end of the end and the fourth insulating gap. In order to make the description simple, it can be understood accordingly in the embodiments of the present application.

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

[0335] It should be understood that the fourth insulating gap described above can be located at a region of the second radiator 420 with relatively large current. The region with relatively large current should be understood as, for the unslotted second radiator 420 (e.g., operating in a quarter-wave mode), when the fourth insulating gap has a length, the electric field intensity of the second radiator 420 becomes weaker, achieving the effect of dispersing the electric field, thereby improving the radiation characteristics (e.g., system efficiency and radiation efficiency) of the second antenna 402.

[0336] In one embodiment, the third element 443 can be a capacitor or an element equivalent to a capacitor, for example, a distributed capacitor.

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

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

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

[0340] It should be understood that, by designing the equivalent capacitance value or the equivalent inductance value of the third element 443 according to the frequency of the resonance point of different resonances, the current distribution on the second radiator 420 can be more dispersed, the conductor loss can be reduced, the radiation aperture of the second radiator 420 can be increased, and thus the radiation characteristics (for example, system efficiency and radiation efficiency) of the second antenna 402 can be improved.

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

[0342] In an embodiment, the distance between the third connection point 433 and / or the fourth connection point 434 and the fourth insulating 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 insulating gap (the length of the second radiator 420 between the third connection point 433 and / or the fourth connection point 434 and the fourth insulating gap). When the third connection point 433 and / or the fourth connection point 434 is electrically connected to the fourth insulating gap through a connecting piece (for example, a metal spring), the distance between the third connection point 433 and / or the fourth connection point 434 and the fourth insulating gap can be understood as the minimum distance between the center of the part of the connecting piece in contact with the connection point and the conductors on both sides of the fourth insulating gap.

[0343] In an embodiment, the third element 443 can be a distributed capacitor, as shown in FIG. 15.

[0344] In an embodiment, the second antenna 402 includes a distributed connecting piece 4431, and the distributed connecting piece 4431 and the second frame 220 together form the third element 443 described above, as shown in FIG. 15. The first end of the distributed connecting piece 4431 is connected to the third connection point 433, and the second end extends to the fourth connection point 434 and is opposite to the fourth connection point 434 (the second radiator 420 between the fifth position 215 and the sixth position 216) and does not contact each other.

[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 insulating gap) can be improved, and the stability of the electronic device 100 can be improved.

[0346] In an embodiment, the second antenna 402 can further include a switch 4432. The switch 4432 is coupled between the distributed connecting piece 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 piece 4431, so as to adjust the equivalent capacitance value or the equivalent inductance value of the third element 443 formed by the distributed connecting piece 4431, and make the second antenna 402 have different radiation characteristics.

[0348] It should be understood that in the formed metamaterial structure described in the embodiments of the present application, the elements coupled to both sides of the gap formed on the radiator can adopt the above structure, and for the sake of brevity of the description, will not be repeated here.

[0349] In one embodiment, the first frame 210 can further include a seventh position 217, and the third position 213 is located between the second position 212 and the seventh position 217, as shown in FIG. 14. 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 floor 300 at the seventh position 217.

[0350] In one embodiment, the parasitic branch 430 includes a conductive part 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 part of the first frame 210 between the second position 212 and the third position 213 serves as the parasitic branch 430. Both ends of the parasitic branch 430 are open ends, and the parasitic branch 430 operates in a half-wavelength mode.

[0352] In the foldable electronic device 100 shown in FIG. 14, the parasitic branch 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 branch 430 can be regarded as an equivalent capacitance (e.g., a distributed capacitance) provided on the parasitic branch 430, which can enable the parasitic branch 430 to form a metamaterial structure.

[0353] In one embodiment, the parasitic branch 430 can 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. The 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 branch 430 is similar to the metamaterial structure formed by the second radiator 420 described in the above embodiments, and the relevant structure definitions can refer to the above metamaterial structure definitions, and for the sake of brevity of the description, will not be repeated here.

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

[0356] The second radiator 420 is electrically connected to the ground plane 300 at the seventh connection point through the fifth element. When the second radiator 420 generates the second resonance, the current on the second radiator 420 is shunted in the area near the seventh connection point. As a result of the shunting in the area near the seventh connection point, the current density on the second radiator 420 is dispersed. In one embodiment, the second radiator current distribution is relatively more dispersed, thereby reducing the conductor loss of the second radiator. In one embodiment, the second radiator current distribution is relatively more dispersed, thereby increasing the radiation aperture of the second radiator 420. As a result of the reduced conductor loss and the increased radiation aperture of the second radiator 420, the radiation characteristics (e.g., system efficiency and radiation efficiency) of the second antenna 402 are 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 branch 430 can also include a sixth element, similar to the fifth element, in which the connection points can refer to the above-mentioned embodiments, and for the sake of brevity of the discussion, will not be repeated.

[0360] In one embodiment, the second antenna 402 can further include a first matching circuit 451, as shown in FIG. 16. The first matching circuit 451 is coupled between the first matching point 261 of the second radiator 420 and the ground plane 300.

[0361] It should be understood that the first matching circuit 451 can be used to adjust the resonance 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 can further include a second matching circuit 452, as shown in FIG. 16. The second matching circuit 452 is coupled between the second matching point 262 of the parasitic branch 430 and the ground plane 300.

[0364] It should be understood that the second matching circuit 452 can be used to adjust the resonance point frequency of the parasitic resonance generated by the parasitic branch 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, the first radiator 410 can also include a third matching point, which is coupled with the third matching circuit between 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 the discussion, it will not be repeated.

[0367] FIGS. 17 to 20 are simulation results of the first antenna and the second antenna in the electronic device 100 shown in FIG. 16. Among them, FIG. 17 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are not provided. FIG. 18 is a simulation result of S parameters of the first antenna and the second antenna when only the first element is provided. FIG. 19 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are provided. FIG. 20 is a simulation result of the radiation efficiency and the system efficiency of the second antenna.

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

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

[0370] The first antenna and the second antenna both generate resonance near 2.25GHz, which can correspond to the first parasitic resonance generated by the parasitic branch described above.

[0371] In the S curve, the first antenna and the second antenna both generate the first parasitic resonance near 2.15GHz, so the first antenna and the second antenna can both couple to generate the same direction current on the first parasitic branch, and the isolation between the first antenna and the second antenna is poor.

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

[0373] As shown in FIG. 18, after the first element is arranged, the first resonance of the first antenna and the second resonance of the second antenna do not change. Due to the parasitic branch loaded with the first element, the parasitic resonance is shifted to the vicinity of 2.7 GHz. The resonance point frequency of the parasitic resonance can be adjusted by the second matching circuit. For the sake of brevity of the description, the embodiments of the present application will not be described one by one.

[0374] In addition, the second antenna generates a new resonance in the vicinity of 0.75 GHz, which can be understood as a second parasitic resonance generated by a new current path introduced on the parasitic branch after the first element is loaded.

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

[0376] As shown in FIG. 19, after the first element and the second element are arranged, the first resonance of the first antenna and the second resonance of the second antenna do not change.

[0377] Due to the first antenna, a first current path can be coupled on the parasitic branch, and a second current path opposite to the current on the first current path can also be coupled on the parasitic branch. Therefore, the first parasitic resonance generated by the first antenna coupling the parasitic branch is weak and not obvious in the S curve. The parasitic resonance generated by the second antenna coupling the parasitic branch is located in the vicinity of 2 GHz. In addition, the first antenna generates a new resonance in the vicinity of 0.6 GHz, which can be understood as a second parasitic resonance generated by a second current path introduced on the parasitic branch after the first element is loaded.

[0378] In addition, after the parasitic branch is loaded with the second element, the current on the parasitic branch coupled by the second antenna flows to the floor, and the isolation between the first antenna and the second antenna is improved. In the first frequency band, the isolation between the first antenna and the second antenna (S12) is improved to about 17.5 dB. In the second frequency band, the isolation between the first antenna and the second antenna (S12) is improved to about 18 dB.

[0379] As shown in FIG. 20, compared with not arranging the first element and / or the second element, the parasitic branch arranged with the first element and the second element can improve the radiation efficiency of the second antenna and the system efficiency.

[0380] FIG. 21 and FIG. 22 are diagrams of current and electric field distribution of the antennas in the electronic device 100 shown in FIG. 16. FIG. 21 is a diagram of current and electric field distribution of the first antenna at a resonance point (1.57 GHz) of the first resonance in the electronic device 100 shown in FIG. 16. FIG. 22 is a diagram of current and electric field distribution of the second antenna at a resonance point (1.74 GHz) of the second resonance in the electronic device 100 shown in FIG. 16.

[0381] As shown in FIG. 21, when the first feeding point 412 feeds in the radio frequency signal, the first current path and the second current path can be generated on the parasitic branch 430. In the second current path, the current on the parasitic branch 430 on both sides of the first connection point 431 is reversed.

[0382] Therefore, the current on the first current path is partially reversed with the current on the second path. The current on the second path can offset part of the current on the first path, so as to weaken the coupling between the first radiator 410 and the second radiator 420, and improve the isolation between the first antenna 401 and the second antenna 402.

[0383] As shown in FIG. 22, when the second feeding point 422 feeds in the radio frequency signal, because the first element 441 is inductive, the operating frequency range of the first antenna 401 is lower than that of the second antenna 402, and the inductive element has the characteristics of low-pass high resistance. The additional current path generated by the second antenna 402 on the parasitic branch 430 is weak, and has less impact on the original current path.

[0384] The first connection point 431 can be located in the region where the current is large (the electric field zero point) in the current path generated by the coupling of the second antenna 402 on the parasitic branch 430. The influence of the first element 441 on the second antenna 402 is smaller, which can make the parasitic branch 430 have greater improvement on the radiation characteristics of the second antenna 402, as shown in FIG. 22.

[0385] The second connection point 432 can be located in the region where the current is large (the electric field zero point) in the current path generated by the coupling of the first antenna 401 on the parasitic branch 430. The influence of the second element 442 on the first antenna 401 is smaller, which can make the parasitic branch 430 have greater improvement on the radiation characteristics of the first antenna 401, as shown in FIG. 21.

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

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

[0388] It should be understood that the first antenna 401 and the second antenna 402 shown in FIG. 23 are only different from the first antenna 401 and the second antenna 402 shown in FIGS. 11-16 in the location of the first connection point 431.

[0389] In the first antenna 401 and the second antenna 402 shown in FIGS. 11-16, the first connection point 431 is located between the second position 212 and the third position 213. The first element 441 coupled between the first connection point 431 and the ground plane 300 can cause an additional second current path (corresponding to the second parasitic resonance in the above-described embodiment) on the parasitic branch 430. The current on the original first current path and the current on the additional second path are partially reversed, 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.

[0390] However, in the first antenna 401 and the second antenna 402 shown in FIG. 23, the first connection point 431 is located between the fourth position 214 and the fifth position 215. In the folded state of the electronic device 100, the first antenna 401 can generate a third current path on the second radiator 420 through the parasitic branch 430. Since the first element 441 is coupled between the first connection point 431 and the ground plane 300 of the second radiator 420, an additional fourth current path can be generated on the second radiator 420. In the fourth current path, the currents on the parasitic branches 430 on both sides of the first connection point 431 are reversed. The current on the original third current path and the current on the additional fourth path are partially reversed, 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.

[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, and the inductive element has the characteristics of low-pass high-resistance. When the second antenna 402 is operating (the second feed point 422 feeds the radio frequency signal), 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 the first antenna 401 and the second antenna 402 shown in FIG. 23, when only the first connection point 431 is provided (the second connection point 432 is not provided), the second frame 220 has the third insulating gap and the fourth insulating gap at the fourth position 214 and the fifth position 215, and the parasitic branch 430 can be in any form. For example, the first frame 210 has the first insulating gap at the second position 212 and is coupled to the ground plane 300 at the third position 213. When the first connection point 431 and the second connection point 432 are provided, the first frame 210 has the first insulating gap and the second insulating gap at the second position 212 and the third position 213, respectively, and the second frame 220 has the third insulating gap and the fourth insulating gap at the fourth position 214 and the fifth position 215, respectively.

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

[0394] It should be understood that at the resonance point of the second resonance, the current on the second radiator 420 is in the same direction. The third resonance can correspond to the fourth current path in the above-described embodiments. At the resonance point of the third resonance, the current on the second radiator 420 includes a partial reverse current.

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

[0396] It should be understood that at the resonance point of the third resonance, in the fourth current path generated by the coupling of the first antenna 401 on the second radiator 420, the current on the second radiator 420 includes a partial reverse current, and the current in the fourth current path can cancel part of the current in the third current path, thereby weakening the overall current generated by the coupling of the first antenna 401 on the second radiator 420, 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.

[0397] At the same time, since the current on the second radiator 420 includes a partial reverse current, the radiation characteristics of the second antenna 402 are weakened to a certain extent. Therefore, in the electronic device 100 shown in FIG. 23, the parasitic branch 430 is mainly used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401.

[0398] In one embodiment, the parasitic branch 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 at 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 the resonance point of the third resonance is closer to the low frequency than the resonance point of the first resonance. 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 fourth current path and the current on the third current path have better cancellation effect, and the first antenna 401 and the second antenna 402 have better isolation.

[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 have a radiation efficiency dip 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 can be less affected by the first connection point 431, so that the second antenna 402 still has good radiation characteristics in the second frequency band.

[0406] In an embodiment, the second feeding point 422 and the first connecting point 431 are located on two sides of the center of the second radiator 420 between the fourth position 214 and the fifth position 215 respectively, 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) and 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) are the same.

[0407] In an embodiment, the side of the second radiator 420 away from the first radiator 410 includes the first connecting point 431 described above. The side of the second radiator 420 close to the first radiator 410 includes the second feeding point 422 described above. In an 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 an embodiment, the first connecting point 431 can be located in a third current large point area of the second radiator 420 between the fourth position 214 and the fifth position 215. Wherein, the third current large point area is generated by the coupling of the second antenna 402.

[0409] It should be understood that the third current large point area generated by the coupling of the second antenna 402 can be understood as the area where the current large point is located in the current path when the second antenna 402 resonates. Since the current corresponds to the electric field, the current large point can also be understood as an electric field zero point (the electric field on both sides of the electric field zero point is reversed).

[0410] When the first connecting point 431 is located in the third current large point area, the first element 441 has less influence on the second antenna 402, which can make the second antenna 402 still have good radiation characteristics in the second frequency band.

[0411] In an 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 the second radiator 420 includes a grounding point, the current distribution on the second radiator 420 will change, making it difficult to control the current distribution on the second radiator 420.

[0413] For the sake of brevity of discussion, similar parts of the first antenna 401 and the second antenna 402 shown in FIG. 23 to those shown in FIGS. 11-16 will not be repeated, such as 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 branch 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 the like.

[0414] FIGS. 24-27 are simulation results of the first antenna and the second antenna in the electronic device 100 shown in FIG. 23. In particular, FIG. 24 is a simulation result of the S parameters of the first antenna in the electronic device 100 shown in FIG. 23. FIG. 25 is a simulation result of the S parameters of the second antenna in the electronic device 100 shown in FIG. 23. FIG. 26 is a simulation result of the radiation efficiency and the system efficiency of the first antenna in the electronic device 100 shown in FIG. 23. FIG. 27 is a simulation result of the radiation efficiency and the system efficiency of the second antenna in the electronic device 100 shown in FIG. 23.

[0415] It should be understood that in the simulation results shown in FIGS. 24-27, the simulation results of the cases without the parasitic branch, with the parasitic branch, with the first element, with the second element, and with the parasitic branch are shown respectively.

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

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

[0418] In addition, the second antenna produces a new resonance near 0.6 GHz, which can be understood as a third resonance caused by the fourth current path introduced by loading the first element on the parasitic branch.

[0419] Compared to the case without the parasitic branch, the isolation (S12) between the first antenna and the second antenna deteriorates by about 7 dB in the case with the parasitic branch. In the case of increasing the first element and the second element, the isolation between the first antenna and the second antenna improves by about 12 dB.

[0420] As shown in FIGS. 26 and 27, compared to the case without the parasitic branch, the parasitic branch improves the radiation efficiency and the system efficiency of the first antenna and the second antenna to a certain extent.

[0421] FIG. 28 is a schematic diagram of another electronic device 100 according to 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, and 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 arranged in the same housing. The electronic device 100 shown in FIG. 28 includes only a single housing, and the first radiator 410 and the second radiator 420 both include part of the frame of the housing.

[0423] As shown in FIG. 28, the electronic device 100 includes a first frame 210 and a floor 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 with the floor 300 or has an insulating gap at the first position 211. The first frame 210 is coupled with the floor 300 or has an insulating gap at the fourth position 214.

[0425] In an embodiment, the first position 211, the second position 212, the third position 213, and the fourth position 214 can be located at a first side 131 of the first frame 210. In an embodiment, the second position 212 and the third position 213 can be located at the first side 131 of the first frame 210, the first position 211 can be located at a second side 132 of the first frame 210, and the fourth position 214 can be located at a third side 133 of the first frame 210. The first side 131 is angularly intersected with the second side 132 and the third side 133, respectively.

[0426] 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.

[0427] The electronic device 100 includes a first antenna 401 and a second antenna 402.

[0428] The first antenna 401 includes a first radiator 410 and a first feeding circuit 411. The first radiator 410 includes a conductive part of the first frame 210 between the first position 211 and the second position 212. At least 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 with the first feeding point 412 and feeds radio frequency signals of a first frequency band.

[0429] The second antenna 402 includes a second radiator 420 and a second feed circuit 421. The second radiator 420 includes a conductive part of the first bezel 210 between the third position 213 and the fourth position 214. At least part of the second radiator 420 is spaced apart from the floor 300. The second radiator 420 includes a second feed point 422. The second feed circuit 421 is coupled to the second feed point 422 to feed radio frequency signals of the second frequency band.

[0430] In one embodiment, the first radiator 410 is configured to generate a first resonance, and a resonance frequency band of the first resonance includes the first frequency band. The second radiator 420 is configured to generate a second resonance, and a resonance frequency band of the second resonance includes the second frequency band. In one embodiment, a resonance point frequency of the first resonance is less than or equal to a resonance point frequency of the second resonance.

[0431] The electronic device 100 further includes a parasitic stub 430 and a first element 441.

[0432] The parasitic stub 430 includes a conductive part of the first bezel 210 between the second position 212 and the third position 213. At least part of the parasitic stub 430 is spaced apart from the floor 300.

[0433] The parasitic stub 430 includes a first connection point 431 between the second position 212 and the third position 213. The first element 441 is coupled between the first connection point 431 and the floor 300. In one embodiment, the first element 441 is inductive.

[0434] A center frequency of the first frequency band is less than a center frequency of the second frequency band, and a 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.

[0435] In one embodiment, the operating frequency band of the first antenna 401 and the operating frequency band of 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).

[0436] For example, the operating frequency band (first frequency band) of the first antenna 401 includes L1 (1578.42±1.023MHz) in the global positioning system (GPS), and the operating frequency band (second frequency band) of the second antenna 402 includes B3 (1.71-1.785GHz) in the LTE. Alternatively, for example, the operating frequency band (first frequency band) of the first antenna 401 includes the 2.4G frequency band (2.4GHz-2.4835GHz) in the Wi-Fi or the BT (2.4GHz-2.4835GHz), and the operating frequency band (second frequency band) of the second antenna 402 includes B7 (2.5GHz-2.57GHz) or B41 (2.496GHz-2.69GHz) in the LTE.

[0437] It should be understood that, in the above embodiments, only the parts of the communication frequency bands that can be included in the first frequency band and the second frequency band are exemplified, and other communication frequency bands can also be included in actual production or design, which is not limited in the embodiments of the present application.

[0438] According to the embodiments of the present application, when the first feeding point 412 feeds the radio frequency signal, the first antenna 401 can couple to generate a first current path on the parasitic branch 430. In the first current path, the parasitic branch 430 between the second position 212 and the third position 213 has a same direction current.

[0439] In the first frequency band, since the first element 441 is coupled between the first connection point 431 of the parasitic branch 430 and the ground plane 300, an additional second current path can be generated on the parasitic branch 430. In the second current path, the currents on the parasitic branch 430 on both sides of the first connection point 431 are opposite.

[0440] Therefore, the current in the first current path and the current in the second path are partially opposite, and the current in the second path can offset part of the current in the first path, so as to weaken the coupling between the first radiator 410 and the second radiator 420, and improve the isolation between the first antenna 401 and the second antenna 402.

[0441] And 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, and the inductive element has the characteristics of low-pass high resistance. The additional current path generated by the second antenna 402 (the second feeding point 422 feeds the radio frequency signal) on the parasitic branch 430 is weak and does not have a great impact on the original current path. The parasitic branch 430 can be used to improve the radiation characteristics (such as radiation efficiency) of the second antenna 402.

[0442] In one embodiment, the parasitic branch 430 and the first element 441 can be used to generate a first parasitic resonance and a second parasitic resonance. The first parasitic resonance has a resonance point frequency greater than a resonance point frequency of the second parasitic resonance, and the second parasitic resonance has a resonance point frequency less than the resonance point frequency of the first parasitic resonance.

[0443] Correspondingly, when the parasitic branch 430 and the second radiator 420 have the same boundary condition (both ends are open ends, or one end is an open end and the other end is a grounded end), the parasitic branch 430 has an electrical length less than an electrical length of the second radiator 420.

[0444] It should be understood that the first current path generated by the first antenna 401 coupling on the parasitic branch 430 and the current path generated by the second antenna 402 coupling on the parasitic branch 430 in the above-described embodiment can correspond to the first parasitic resonance. The second current path generated by the first antenna 401 coupling on the parasitic branch 430 in the above-described embodiment can correspond to the second parasitic resonance.

[0445] 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 of the first antenna 401 and the second antenna 402 in the first frequency band.

[0446] It should be understood that at the resonance point of the first parasitic resonance, the currents on the parasitic branch 430 in the first current path generated by the first antenna 401 coupling on the parasitic branch 430 and the current path generated by the second antenna 402 coupling on the parasitic branch 430 are in the same direction, and the same direction current can be used to improve the radiation characteristics (e.g., radiation efficiency) of the antenna.

[0447] At the resonance point of the second parasitic resonance, the current on the parasitic branch 430 in the second current path generated by the first antenna 401 coupling on the parasitic branch 430 includes a part of the reverse current, and the current on the second current path can offset part of the current on the first current path, so that the overall current generated by the first antenna 401 coupling on the parasitic branch 430 is weakened (due to the weakening of the overall current, the first parasitic resonance has less improvement on the radiation characteristics of the first antenna 401), and the coupling between the first radiator 410 and the second radiator 420 is weakened, and the isolation between the first antenna 401 and the second antenna 402 is improved.

[0448] Therefore, in the electronic device 100 shown in FIG. 11, the parasitic branch 430 is mainly used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402.

[0449] In one embodiment, the frequency difference between the resonant point frequency of the second parasitic resonance and the resonant point frequency of the first resonance is greater than or equal to 100 MHz. In one embodiment, the frequency difference between the resonant point frequency of the second parasitic resonance and the resonant point frequency of the first resonance is less than or equal to 800 MHz.

[0450] It should be understood that the resonant point of the second parasitic resonance is closer to the low frequency than the resonant point of the first resonance. When the frequency between the resonant point frequency of the second parasitic resonance and the resonant point frequency of the first resonance is within a certain range, the current on the second current path and the current on the first current path have better cancellation effect, and the first antenna 401 and the second antenna 402 have better isolation. Moreover, the first antenna 401 does not produce a dip in the radiation efficiency in the first frequency band due to the second parasitic resonance being close to the first resonance, and the radiation characteristics of the first antenna 401 in the first frequency band are not reduced.

[0451] In one embodiment, the frequency difference between the resonant point frequency of the first parasitic resonance and the resonant point frequency of the second resonance is greater than or equal to 100 MHz and less than or equal to 400 MHz.

[0452] It should be understood that when the frequency between the resonant point frequency of the first parasitic resonance and the resonant point frequency of the second resonance is within a certain range, the second antenna 402 does not produce a dip in the radiation efficiency 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 (e.g., radiation efficiency) in the second frequency band.

[0453] 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 x 150% ≤ L2.

[0454] It should be understood that as the length of the parasitic branch 430 increases, it is more beneficial to improve the radiation characteristics of the antenna (the first antenna 401 or the second antenna 402).

[0455] In one embodiment, the first connection point 431 is disposed on the side of the parasitic branch 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 branch 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 branch 430 between the first connection point 431 and the third position 213).

[0456] It should be understood that when the first connection point 431 is arranged on the parasitic branch 430 away from the first radiator 410, the reverse current between the current on the first current path and the current on the second path can be increased, the coupling between the first radiator 410 and the second radiator 420 is further reduced, and the isolation between the first antenna 401 and the second antenna 402 is improved.

[0457] In an embodiment, the first connection point 431 can be located in a first current maximum point region of the parasitic branch 430 between the second position 212 and the third position 213. The first current maximum point region is generated by the coupling of the second antenna 402.

[0458] It should be understood that the first current maximum point region generated by the coupling of the second antenna 402 can be understood as a region where a current maximum point is located in a current path generated by the coupling of the second antenna 402 on the parasitic branch 430. Since the current corresponds to the electric field, the current maximum point can also be understood as an electric field zero point (the electric field on both sides of the electric field zero point is reversed). The current maximum point region described in the embodiment of the present application can be understood as a region within 5 mm from the electric field zero point.

[0459] When the first connection point 431 is located in the first current maximum point region, the first element 441 has less influence on the second antenna 402, and the parasitic branch 430 can have greater improvement on the radiation characteristics of the second antenna 402.

[0460] In an embodiment, the equivalent inductance value of the first element 441 can be determined according to the frequency of the actual first frequency band. In an 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.

[0461] In an embodiment, the electronic device 100 further includes a second element 442. The parasitic branch 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 an embodiment, the second element 442 is capacitive.

[0462] According to the embodiment of the present application, part of the current in the current path generated by the second antenna 402 flows 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.

[0463] 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, and the capacitive element has the characteristics of high-pass and low resistance. On the parasitic branch 430, the current path generated by the first antenna 401 is not affected near the second connection point 432, and the parasitic branch 430 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401.

[0464] In one embodiment, the first connection point 431 and the second connection point 432 are located on both sides of the center of the parasitic branch 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 branch 430 between the center and the second position 212) and the distance between the center and the third position 213 (the length of the parasitic branch 430 between the center and the third position 213) are the same.

[0465] In one embodiment, the side of the parasitic branch 430 away from the first radiator 410 includes the first connection point 431 described above. The side of the parasitic branch 430 close to the first radiator 410 includes the second connection point 432 described above. In one embodiment, the distance between the second connection point 432 and the second position 212 (the length of the parasitic branch 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 branch 430 between the second connection point 432 and the third position 213).

[0466] In one embodiment, the second connection point 432 can be located in a second current large point area of the parasitic branch 430 between the second position 212 and the third position 213. Wherein, the second current large point area is generated by the coupling of the first antenna 401.

[0467] It should be understood that the above-mentioned second current large point area generated by the first antenna 401 can be understood as the area where the current large point is located in the current path generated by the coupling of the first antenna 401 on the parasitic branch 430.

[0468] When the second connection point 432 is located in the second current large point area, the influence of the second element 442 on the first antenna 401 is smaller, which can make the parasitic branch 430 have greater improvement on the radiation characteristics of the first antenna 401.

[0469] 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 2GHz, the equivalent inductance value of the second element 442 is less than or equal to 2pF. When the center frequency of the second frequency band is greater than 2GHz, the equivalent inductance value of the second element 442 is greater than or equal to 1pF.

[0470] In one embodiment, the first edge frame 210 is coupled to the floor 300 at the first location 211. In one embodiment, the first edge frame 210 is coupled to the floor 300 at the fourth location 214.

[0471] 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, forming a structure similar to an IFA or a structure similar to a left-handed antenna.

[0472] In one embodiment, the first radiator 410 and / or the second radiator 420 generates a resonance corresponding 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.

[0473] In one embodiment, the first edge frame 210 has an insulating gap at the first location 211. In one embodiment, the first edge frame 210 has an insulating gap at the fourth location 214.

[0474] 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.

[0475] In one embodiment, the first radiator 410 and / or the second radiator 420 generates a resonance corresponding 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.

[0476] In one embodiment, both ends of the parasitic branch 430 are open ends, forming an antenna structure similar to a dipole, and the parasitic branch 430 operates in a half wavelength mode. The parasitic branch 430 can generate a parasitic resonance from the line DM mode in the above embodiment.

[0477] 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 edge frame 210 has an insulating gap at the first location 211 or the fourth location 214, and the structure formed by the first radiator 410 and the second radiator 420 can be determined according to actual production or design.

[0478] In one embodiment, the second antenna 402 further includes a third element 443, as shown in FIG. 29. The second radiator 420 can further include a third connection point 433, the parasitic branch 430 can further include a fourth connection point 434, and a 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.

[0479] It should be understood that the second radiator 420 and the parasitic branch 430 can collectively form the metamaterial structure in the above embodiments, and the related structure definitions can refer to the above definitions of the metamaterial structure, such as the specific values of the third element 443, the distance between the third connection point 433 and / or the fourth connection point 434 and the second insulating gap, and the like, which will not be described again for the sake of brevity.

[0480] In an embodiment, the second radiator 420, the parasitic branch 430 and the first element 441 are configured to generate a second resonance and a third resonance, the second resonance having a resonance frequency band including the second frequency band. In an embodiment, the first resonance has a resonance point frequency less than or equal to a resonance point frequency of the second resonance. The first resonance has a resonance point frequency greater than a resonance point frequency of the third resonance.

[0481] It should be understood that the second radiator 420 and the parasitic branch 430 can collectively form the metamaterial structure in the above embodiments, and the parasitic branch 430 is not configured to generate a parasitic resonance, but the parasitic branch 430 and the second radiator 420 collectively serve as a radiator of the second antenna 402.

[0482] At the resonance point of the second resonance, the current on the parasitic branch 430 is 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 current on the parasitic branch 430 includes a part of the reverse current.

[0483] In an embodiment, the third resonance can be configured to improve the isolation between the first antenna 401 and the second antenna 402 in the first frequency band.

[0484] It should be understood that at the resonance point of the third resonance, in the second current path generated by the coupling of the first antenna 401 on the parasitic branch 430, the current on the parasitic branch 430 includes a part of the reverse current, and the current in the second current path can offset a part of the current in the first current path, thereby weakening the overall current on the second radiator 420 generated by the coupling 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.

[0485] In an 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 an 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.

[0486] It should be understood that the resonance point of the third resonance is closer to the low frequency than the resonance point of the first resonance. 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 and the current on the first current path have better cancellation effect, and the first antenna 401 and the second antenna 402 have better isolation. FIGS. 30 and 31 are simulation results of S parameters of the first antenna and the second antenna in the electronic device 100 shown in FIG. 29. Among them, FIG. 30 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are not arranged. FIG. 31 is a simulation result of S parameters of the first antenna and the second antenna when the first element and the second element are arranged.

[0487] As shown in FIGS. 30 and 31, the first antenna (S11) resonates near 1.55 GHz, which can correspond to the first resonance described above, and the resonance frequency band of the first resonance includes the L1 frequency band in GPS. The second antenna (S22) resonates near 1.75 GHz, which can correspond to the second resonance described above, and the resonance frequency band of the second resonance includes the B3 frequency band in LTE.

[0488] In addition, the second antenna produces a new resonance near 0.6 GHz, which can be understood as a third resonance produced by the second current path introduced by loading the first element on the parasitic branch.

[0489] When the first element and the second element are not arranged, the isolation between the first antenna and the second antenna (S12) is only about 12 dB in the first frequency band, and the isolation between the first antenna and the second antenna (S12) is only about 9 dB in the second frequency band, as shown in FIG. 30.

[0490] When the first element and the second element are arranged, the isolation between the first antenna and the second antenna (S12) is improved to about 14 dB in the first frequency band, and the isolation between the first antenna and the second antenna (S12) is improved to about 14 dB in the second frequency band, as shown in FIG. 31.

[0491] FIG. 32 is a schematic diagram of another electronic device 100 provided by an embodiment of the present application.

[0492] As shown in FIG. 32, the electronic device 100 can include a first housing 201, a second housing 202, a first rotating shaft 203, and a floor 300.

[0493] Among them, the first housing 201 includes a first frame 210, and at least part of the first frame 210 is arranged spaced apart from the floor 300. The second housing 202 includes a second frame 220, and at least part of the second frame 220 is arranged spaced apart from the floor 300.

[0494] The first rotating shaft 203 is located between the first housing 201 and the second housing 202, and the first rotating shaft 203 is rotationally connected with 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 an embodiment, the floor 300 can include a first part and a second part, the first part can be located in the first housing 201, and the second part can be located in the second housing 202, and the first part and the second part can be connected by the first rotating shaft 203.

[0495] It should be understood that the electronic device 100 shown in FIG. 32 is only different from the electronic device 100 shown in FIGS. 28 and 29 in whether the electronic device 100 can be folded.

[0496] In the electronic device 100 shown in FIGS. 28 and 29, the electronic device 100 includes only one housing, and the first radiator 410 of the first antenna 401 and the second radiator 420 of the second antenna 402 each include a part of the frame of the housing.

[0497] However, in the electronic device 100 shown in FIG. 32, the electronic device 100 includes multiple housings (for example, the first housing 201 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 each include a part of the frame of the first housing 201.

[0498] In an embodiment, the second frame 220 can further include a fifth position 215 and a sixth position 216, as shown in FIG. 33. 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.

[0499] In an embodiment, the electronic device 100 can 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 part of the parasitic stub 511 is spaced apart from the floor 300.

[0500] When the electronic device 100 is in a folded state, the parasitic stub 511 and the first radiator 410 at least partially overlap in a first direction. 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 the direction perpendicular to the display screen, for example, the x direction.

[0501] It should be understood that the parasitic branch 511 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the first antenna 401. For example, the parasitic resonance generated by the parasitic branch 511 has a resonance point frequency that is greater than or equal to 100 MHz and less than or equal to 400 MHz different from the resonance point frequency of the resonance generated by the first antenna 401. In one embodiment, when the first feed point 412 feeds the radio frequency signal, the current on the first radiator 410 and the current on the parasitic branch 511 are in the same direction.

[0502] In one embodiment, the second bezel 220 is coupled to the floor 300 at the fifth position 215 and has a third insulating gap at the sixth position 216.

[0503] It should be understood that one end of the parasitic branch 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. The parasitic branch 511 can operate in a quarter-wave mode. The embodiments of the present application do not limit the specific structure of the parasitic branch 511, which can be determined according to actual production or design, for example, the second bezel 220 has an insulating gap at both the fifth position 215 and the sixth position 216.

[0504] In one embodiment, the electronic device 100 is in a folded state, and the first insulating gap is aligned with the third insulating gap to improve the aesthetics of the electronic device 100.

[0505] In one embodiment, the second bezel 220 can further include a seventh position 217 and an eighth position 218, as shown in FIG. 33. The second bezel 220 has an insulating gap or is coupled to the floor 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 bezel.

[0506] In one embodiment, the electronic device 100 can further include a parasitic branch 512. The parasitic branch 512 includes a conductive portion of the second bezel 220 between the seventh position 217 and the eighth position 218. At least part of the parasitic branch 511 is spaced apart from the floor 300.

[0507] When the electronic device 100 is in a folded state, the parasitic branch 512 and the second radiator 420 at least partially overlap in the first direction.

[0508] It should be understood that the parasitic branch 512 can be used to improve the radiation characteristics (e.g., radiation efficiency) of the second antenna 402. For example, the parasitic branch 512 generates a parasitic resonance with a resonance point frequency that is greater than or equal to 100 MHz and less than or equal to 400 MHz from a resonance point frequency of a resonance generated by the second antenna 402. In one embodiment, when the second feed point 422 feeds a radio frequency signal, the current on the second radiator 420 and the current on the parasitic branch 512 are in the same direction.

[0509] In one embodiment, the second bezel 220 is coupled to the floor 300 at the eighth position 218 and has a fourth insulating gap at the seventh position 217.

[0510] It should be understood that one end of the parasitic branch 512 is a grounded end and the other end is an open end, and the parasitic branch 512 can form a structure similar to an IFA or a left-handed antenna. The parasitic branch 512 can operate in a quarter wavelength mode. The embodiments of the present application do not limit the specific structure of the parasitic branch 512, and the specific structure of the parasitic branch 512 can be determined according to actual production or design, for example, the second bezel 220 has an insulating gap at the seventh position 217 and the eighth position 218.

[0511] In one embodiment, the electronic device 100 is in a folded state, and the second insulating gap is aligned with the fourth insulating gap to improve the aesthetics of the electronic device 100.

[0512] In one embodiment, the second bezel 220 has a third insulating gap at the sixth position 216 and a fourth insulating gap at the seventh position 217. The parasitic branch 512 includes a conductive portion of the second bezel 220 between the sixth position 216 and the eighth position 218, as shown in FIG. 34.

[0513] In one embodiment, the second antenna 402 can further include a fourth element 444. The parasitic branch 512 can 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.

[0514] It should be understood that the parasitic branch 512 can form a metamaterial structure similar to the metamaterial structure formed by the second radiator 420 in the above-described embodiments, and the related structure definitions can refer to the above-described metamaterial structure definitions, and will not be described again for the sake of brevity.

[0515] For the sake of brevity of discussion, similar parts of the first antenna 401 and the second antenna 402 shown in FIGS. 32-34 to the first antenna 401 and the second antenna 402 shown in FIGS. 28 and 29 are not described again, 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 branch 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 the like.

[0516] FIGS. 35 and 36 are simulation results of the radiation efficiency and the system efficiency of the first antenna and the second antenna in the electronic device 100 shown in FIG. 34. In particular, FIG. 35 is a simulation result of the radiation efficiency and the system efficiency of the first antenna and the second antenna in the electronic device 100 shown in FIG. 34. FIG. 36 is a simulation result of the radiation efficiency and the system efficiency of the second antenna in the electronic device 100 shown in FIG. 34.

[0517] It should be understood that, for the sake of brevity of discussion, in the simulation results shown in FIGS. 35 and 36, 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.

[0518] As shown in FIG. 35, in the electronic device 100 shown in FIG. 34, after the parasitic branch 511 is provided to the first antenna, in the first frequency band, the radiation efficiency is improved by about 2 dB, and the system efficiency is improved by about 2 dB.

[0519] As shown in FIG. 35, in the electronic device 100 shown in FIG. 34, after the parasitic branch 512 is provided to the second antenna, in the second frequency band, the radiation efficiency is improved by about 0.5 dB, and the system efficiency is improved by about 0.5 dB.

[0520] The above describes only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the scope of protection of the present application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims.

Claims

1. An electronic device, comprising: comprise: a first housing, a second housing and a floor, the first housing comprises a first bezel, and the second housing comprises a second bezel; the first bezel comprises a first position, a second position and a third position arranged in sequence, the first bezel is coupled with the floor or has an insulating gap at the first position, the first bezel has a first insulating gap and a second insulating gap at the second position and the third position respectively; the second bezel comprises a fourth position and a fifth position, the second bezel has a third insulating gap at the fourth position, and the second bezel 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 housing and the second housing, and the first rotating shaft is rotatably connected with the first housing and the second housing respectively; and a first antenna, the first antenna comprises: a first radiator, the first radiator comprises a conductive part of the first bezel between the first position and the second position, at least part of the first radiator is spaced apart from the floor, and a first feed circuit, the first radiator comprises a first feed point, and the first feed circuit is coupled with the first feed point to feed radio frequency signals of a first frequency band; a second antenna, the second antenna comprises: a second radiator, the second radiator comprises a conductive part of the second bezel between the fourth position and the fifth position, at least part of the second radiator is spaced apart from the floor, and a second feed circuit, the second radiator comprises a second feed point, and the second feed circuit is coupled with the second feed point to feed radio frequency signals of a second frequency band; the electronic device further comprises: a parasitic branch, the parasitic branch comprises a conductive part of the first bezel between the second position and the third position, at least part of the parasitic branch is spaced apart from the floor, and a first element, the parasitic branch comprises 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 in a first direction, and the first radiator and the second radiator are arranged staggered in the first direction, the first direction being 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 less 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 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.

2. The electronic device of claim 1, wherein a distance between the first connection point and the second position is greater than a distance between the first connection point and the third position.

3. The electronic device of claim 1 or 2, wherein ​ The first connection point is located at a first current large point region of the parasitic branch, and the first current large point region is generated by the second antenna coupling. 4.The electronic device of any one of claims 1-3, wherein, the first radiator is configured to generate a first resonance, and a resonance frequency band of the first resonance includes the first frequency band; the second radiator is configured to generate a second resonance, and a resonance frequency band of the second resonance includes the second frequency band, and a resonance point frequency of the second resonance is greater than or equal to a resonance point frequency of the first resonance; the parasitic branch and the first element are configured to generate a first parasitic resonance and a second parasitic resonance, a resonance point frequency of the first parasitic resonance is greater than a resonance point frequency of the second resonance, and a resonance point frequency of the second parasitic resonance is less than the resonance point frequency of the first resonance. 5.The electronic device of claim 4, wherein, a 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 of claim 4 or 5, wherein, a 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 of any one of claims 4-6, wherein, at a resonance point of the first parasitic resonance, currents on the parasitic branch are in the same direction, and / or, at a resonance point of the second parasitic resonance, the currents on the parasitic branch include partial reverse currents. 8.The electronic device of any one of claims 4-7, wherein, the first parasitic resonance is configured to improve a radiation efficiency of the second antenna in the second frequency band, and / or, the second parasitic resonance is configured to improve an isolation degree of the first antenna and the second antenna in the first frequency band. 9.The electronic device of any one of claims 1-8, wherein, the electronic device further comprises a second element, the parasitic branch comprises a second connection point, the second element is capacitive, and the second element is coupled between the second connection point and the ground plate. 10.The electronic device of claim 9, wherein, a distance between the second connection point and the second position is less than a distance between the second connection point and the third position. 11.The electronic device of claim 9 or 10, wherein, the second connection point is located at a third current large point region of the parasitic branch, and the third current large point region is generated by the first antenna coupling.

12. The electronic device of any of claims 9-11, wherein, the second element is configured to improve an isolation degree of the first antenna and the second antenna in the second frequency band. 13.The electronic device of any one of claims 1-12, wherein, the first bezel is coupled with the ground plate at the first position; the second bezel 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 of any one of claims 1-13, wherein: the second frame further comprises a sixth position, the fifth position is between the fourth position and the sixth position, the second frame has a fourth insulating gap at the fifth position, and the second frame is coupled to the floor at the sixth position; the second radiator comprises a conductive portion of the second frame between the fourth position and the sixth position; the second antenna further comprises a third element, the second radiator comprises a third connection point and a fourth connection point, the fourth insulating gap is 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 of claim 14, wherein: a 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 of any one of claims 1-15, wherein: the first frame further comprises a seventh position, the third position is between the second position and the seventh position, and the first frame is coupled to the floor at the seventh position; the parasitic branch comprises a conductive portion of the first frame between the second position and the seventh position, and the first connection point is on the parasitic branch between the second position and the third position; the first antenna and the second antenna further comprise a fourth element, the parasitic branch comprises a fifth connection point and a sixth connection point, the second insulating gap is 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 of claim 16, wherein: a distance between the second insulating gap and the fifth connection point and / or the sixth connection point is less than or equal to 5 mm. 18.The electronic device of any one of claims 1-17, wherein: a length L1 of the first frame between the first position and the second position and a length L2 of the first frame between the second position and the third position satisfy: L1×150%≤L2. 19.The electronic device of any one of claims 1-18, wherein: the first frequency band comprises 1578.42±1.023 MHz, and the second frequency band comprises 1.71 GHz-1.785 GHz, and / or the first frequency band comprises 2.4 GHz-2.4835 GHz, and the second frequency band comprises 2.5 GHz-2.57 GHz or 2.496 GHz-2.69 GHz. The first frame between the second position and the third position does not comprise a ground point. comprise: a first housing, a second housing, and a floor, the first housing comprises a first frame, and the second housing comprises a second frame; ​ ​ ​ ​ ​ ​ ​ 20. The electronic device of any of claims 1-19, wherein, ​ 21. An electronic device, comprising: ​ ​ ​ The first edge frame includes a first position, a second position and a third position arranged in sequence, the first edge frame is coupled with or has an insulating gap with the floor at the first position, the first edge frame has a first insulating gap and a second insulating gap at the second position and the third position respectively; The second edge frame includes a fourth position and a fifth position, the second edge frame has a third insulating gap and a fourth insulating gap at the fourth position and the fifth position respectively; A first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotationally connected with the first shell and the second shell respectively; And A first antenna includes: A first radiator includes a conductive part of the first edge frame between the first position and the second position, at least part 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 with the first feeding point to feed radio frequency signals of a first frequency band; A second antenna includes: A second radiator includes a conductive part of the second edge frame between the fourth position and the fifth position, at least part 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 with the second feeding point to feed radio frequency signals of a second frequency band, and A first element, the second radiator includes a first connecting point, the first element is inductive, and the first element is coupled between the first connecting point and the floor; The electronic device further includes: A parasitic branch includes a conductive part of the first edge frame between the second position and the third position, at least part of the parasitic branch is spaced apart from 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 misaligned along the first direction, the first direction being a 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 of 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 connecting point and the fourth position is greater than the distance between the first connecting 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 of claim 21 or 22, wherein, the first connecting point is located in a second current large point area of the second radiator, and the second current large point area is generated by coupling of the second antenna. 24.The electronic device of any of claims 21-23, wherein: the first radiator is configured to generate a first resonance, a resonance frequency band of the first resonance including the first frequency band; the second radiator and the first element are configured to generate a second resonance and a third resonance, a resonance frequency band of the second resonance including the second frequency band, a resonance point frequency of the second resonance being greater than or equal to a resonance point frequency of the first resonance, a resonance point frequency of the third resonance being less than the resonance point frequency of the first resonance; and the parasitic branch is configured to generate a first parasitic resonance, a resonance point frequency of the first parasitic resonance being greater than the resonance point frequency of the second resonance. 25.The electronic device of claim 24, wherein: a 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 100MHz. 26.The electronic device of claim 24 or 25, wherein: a 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 100MHz and less than or equal to 400MHz. 27.The electronic device of any of claims 24-26, wherein: at a resonance point of the second resonance, currents on the second radiator are co-directional, and / or at a resonance point of the third resonance, currents on the second radiator include partial reverse currents. 28.The electronic device of any of claims 24-27, wherein: the first parasitic resonance is configured to improve a radiation efficiency of the first antenna at the first frequency band, and / or the third resonance is configured to improve an isolation of the first antenna and the second antenna at the first frequency band. 29.The electronic device of any of claims 21-28, wherein: the electronic device further comprises a second element, the parasitic branch comprises 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 of claim 29, wherein: a distance between the second connection point and the second location is less than a distance between the second connection point and the third location. 31.The electronic device of claim 29 or 30, wherein: the second connection point is located at a third current large point area of the parasitic branch, the third current large point area being generated by the first antenna coupling, and the second element is configured to improve an isolation of the first antenna and the second antenna at the second frequency band. 33.The electronic device of any of claims 21-32, wherein: a length L1 of a first bezel between the first location and the second location and a length L2 of a first bezel between the second location and the third location satisfy: L1×150%≤L2, and a second bezel between the fourth location and the fifth location does not include a grounding point. comprises: a first bezel and a ground plane, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 32. The electronic device of any of claims 29-31, wherein, ​ ​ ​ 34. The electronic device of any of claims 21-33, wherein, ​ 35. An electronic device, comprising: ​ ​ The first edge frame includes a first position, a second position, a third position and a fourth position arranged in sequence, the first edge frame is coupled with the floor or has an insulating gap at the first position, the first edge frame has a first insulating gap and a second insulating gap at the second position and the third position respectively, and the first edge frame is coupled with the floor or has an insulating gap at the fourth position; The first antenna includes: A first radiator including a conductive part of the first edge frame between the first position and the second position, at least part of the first radiator being arranged spaced apart from the floor, and A first feeding circuit, the first radiator including a first feeding point, the first feeding circuit being coupled with the first feeding point to feed a radio frequency signal of a first frequency band; The second antenna includes: A second radiator including a conductive part of the first edge frame between the third position and the fourth position, at least part of the second radiator being arranged spaced apart from the floor, and A second feeding circuit, the second radiator including a second feeding point, the second feeding circuit being coupled with the second feeding point to feed a radio frequency signal of a second frequency band; The electronic device further includes: A first parasitic branch including a conductive part of the first edge frame between the second position and the third position, at least part of the first parasitic branch being arranged spaced apart from the floor, and A first element being inductive, the first parasitic branch including a first connecting point, the first element being coupled between the first connecting point and the floor; wherein 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 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 of claim 35, wherein a distance between the first connecting point and the second position is greater than a distance between the first connecting point and the third position.

37. The electronic device of claim 35 or 36, wherein the first connecting point is located in a first current maximum point region of the first parasitic branch, the first current maximum point region being generated by coupling of the second antenna.

38. The electronic device of any of claims 35-37, wherein, The first element is used to improve an isolation of the first antenna and the second antenna in the first frequency band.

39. The electronic device of any one of claims 35 to 38, wherein the first antenna and the second antenna further include a second element being capacitive, the first parasitic branch including a second connecting point, the second element being coupled between the second connecting point and the floor.

40. The electronic device of claim 39, wherein a distance between the second connecting point and the second position is less than a distance between the second connecting point and the third position.

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

42. The electronic device of any of claims 39-41, wherein, The second element is configured to improve isolation of the first antenna and the second antenna in the second frequency band. 43.The electronic device of any one of claims 35-42, wherein, the first bezel is coupled to the floor at the fourth position; The second antenna further comprises a third element, the second radiator comprises a third connection point, the first parasitic branch comprises a fourth connection point, and the third element is coupled between the third connection point and the fourth connection point. 44.The electronic device of claim 43, wherein, a distance between the second insulating gap and the third connection point and / or the fourth connection point is less than or equal to 5mm. 45.The electronic device of any one of claims 35-44, wherein, The electronic device further comprises a first housing, a second housing, and a first pivot shaft, the first pivot shaft is located between the first housing and the second housing, and the first pivot shaft is rotatably connected to the first housing and the second housing, respectively; The first housing comprises the first bezel, The second housing comprises a second bezel; The second bezel comprises a fifth position and a sixth position, the second bezel is coupled to the floor or has an insulating gap at the fifth position, and the second bezel is coupled to the floor or has an insulating gap at the sixth position; The electronic device further comprises a second parasitic branch, the second parasitic branch comprises a conductive part of the second bezel between the fifth position and the sixth position, and at least part of the second parasitic branch is spaced apart from the floor; Based on the electronic device being in a folded state, the second parasitic branch and the first radiator at least partially overlap in a first direction, and the first direction is a thickness direction of the electronic device. 46.The electronic device of any one of claims 35-45, wherein, The electronic device further comprises a first housing, a second housing, and a first pivot shaft, the first pivot shaft is located between the first housing and the second housing, and the first pivot shaft is rotatably connected to the first housing and the second housing, respectively; The first housing comprises the first bezel, and the second housing comprises a second bezel; the second bezel comprises a seventh position and an eighth position, the second bezel is coupled to the floor or has an insulating gap at the seventh position, and the second bezel is coupled to the floor or has an insulating gap at the eighth position; The electronic device further comprises a third parasitic branch, the third parasitic branch comprises a conductive part of the second bezel between the seventh position and the eighth position, and at least part of the third parasitic branch is spaced apart from the floor; Based on the electronic device being in a folded state, the third parasitic branch and the second radiator at least partially overlap in a first direction, and the first direction is a thickness direction of the electronic device. 47.The electronic device of any one of claims 35 to 44, wherein, the electronic device further includes a first housing, a second housing, and a first pivot axis between the first housing and the second housing, and the first pivot axis is rotatably connected with the first housing and the second housing, respectively; the first housing includes the first bezel, and the second housing includes a second bezel, wherein the second bezel includes a fifth position, a sixth position, a seventh position, and an eighth position arranged in sequence, the second bezel is coupled with the floor at the fifth position, the second bezel has a third insulating gap and a fourth insulating gap at the sixth position and the seventh position, respectively, and the second bezel is coupled with 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 part of the second bezel between the fifth position and the sixth position, and the third parasitic stub includes a conductive part of the second bezel between the sixth position and the eighth position, at least part of the second parasitic stub is spaced apart from the floor, and at least 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 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 the folded state, the second parasitic stub and the first radiator at least partially overlap in a first direction, the third parasitic stub and the second radiator at least partially overlap in the first direction, and the first direction is a thickness direction of the electronic device. 48.The electronic device of any one of claims 35 to 47, wherein, a length L1 of the first bezel between the first position and the second position and a length L2 of the first bezel between the second position and the third position satisfy: L1 × 150% ≤ L2.

49. The electronic device of any of claims 35-48, wherein, the first bezel between the second position and the third position does not include a grounding point.

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