Antenna assembly and electronic equipment

Abstract

The embodiment of the utility model provides an antenna assembly and an electronic device, and the antenna assembly comprises a first antenna and a second antenna which are arranged at an interval; the backflow branch knot is arranged between the first antenna and the second antenna; the backflow branch knot comprises a first sub branch knot and a second sub branch knot which are arranged at an interval, the first sub branch knot and the second sub branch knot are electrically connected with the first antenna and the second antenna, and the current directions of the first sub branch knot and the second sub branch knot are opposite. According to the utility model, the problem that the antenna assemblies in the terminal influence each other in the prior art is solved, and the effect of improving the isolation between the antennas is further achieved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of antennas, and in particular, to an antenna assembly and an electronic device. Background Art

[0002] As the number of terminal antennas increases, the distance between two antennas is obviously closer, and many of them are MIMO antennas with the same frequency. This will inevitably cause mutual interference between antennas, affect the antenna radiation effect, and significantly reduce the terminal rate.

[0003] It can be seen from this that in the related art there is a problem of antenna components in the terminal affecting each other.

[0004] With respect to the above-mentioned problems existing in the related technologies, no effective solution has been proposed yet. Utility Model Content

[0005] The embodiments of the utility model provide an antenna assembly and an electronic device, so as to at least solve the problem of mutual influence of antenna assemblies in a terminal existing in the related art.

[0006] According to one embodiment of the utility model, an antenna assembly is provided, including: a first antenna and a second antenna, the first antenna and the second antenna being arranged at an interval; a return branch, the return branch being arranged between the first antenna and the second antenna; the return branch including a first sub-branch and a second sub-branch arranged at an interval, the first sub-branch and the second sub-branch being electrically connected to the first antenna and the second antenna, and the current directions on the first sub-branch and the second sub-branch being opposite.

[0007] In an exemplary embodiment, the antenna assembly also includes a drainage branch, which extends from the first antenna to the second antenna, one end of the drainage branch is electrically connected to the first antenna, the other end of the drainage branch is electrically connected to the second antenna, and the first sub-branch and the second sub-branch are both electrically connected to the drainage branch.

[0008] In an exemplary embodiment, the drainage branch includes a first drainage branch, an intermediate branch and a second drainage branch arranged in sequence from the first antenna to the second antenna; the antenna assembly also includes a first attenuation device and a second attenuation device, one end of the first drainage branch is electrically connected to the first antenna, the first drainage branch is electrically connected to the intermediate branch through the first attenuation device, one end of the second drainage branch is electrically connected to the second antenna, and the second drainage branch is electrically connected to the intermediate branch through the second attenuation device; the first attenuation device and the second attenuation device are used to reduce the amplitude of the current.

[0009] In an exemplary embodiment, the first attenuation component and the second attenuation component both include resistors, and the resistance values ​​of the first attenuation component and the second attenuation component are 8Kohm-12Kohm.

[0010] In an exemplary embodiment, it is characterized in that there are a plurality of return branches, and the plurality of return branches are arranged at intervals between the first antenna and the second antenna.

[0011] In an exemplary embodiment, the first sub-branch and the second sub-branch are arranged in parallel, and both the first sub-branch and the second sub-branch extend from the first antenna to the second antenna; the end of the first sub-branch close to the first antenna is electrically connected to the drainage branch through a first connecting branch, and the end of the second sub-branch close to the second antenna is electrically connected to the drainage branch through a second connecting branch.

[0012] In an exemplary embodiment, the antenna assembly further includes a third attenuation device, the second connecting branch is electrically connected to the drainage branch via the third attenuation device, and the third attenuation device is used to reduce the amplitude of the current.

[0013] In an exemplary embodiment, the return branch also includes a third sub-branch and a fourth sub-branch arranged between the first sub-branch and the second connecting branch, the third sub-branch and the fourth sub-branch are arranged in parallel and at intervals, and the extension direction of the third sub-branch and the fourth sub-branch is parallel to the extension direction of the first sub-branch; one end of the fourth sub-branch close to the second connecting branch is electrically connected to the drainage branch, and one end of the third sub-branch close to the first connecting branch is electrically connected to the second sub-branch.

[0014] In an exemplary embodiment, the first antenna includes a first inverted-F antenna, a ground branch of the first inverted-F antenna is electrically connected to the first sub-branch; the second antenna includes a second inverted-F antenna, and a ground branch of the second inverted-F antenna is electrically connected to the second sub-branch.

[0015] According to another embodiment of the present invention, an electronic device is provided, including: a radio frequency circuit and an antenna assembly as in any of the above embodiments, wherein the radio frequency circuit is electrically connected to both the first antenna and the second antenna.

[0016] Through the utility model, when the first antenna is working, the current from the first antenna enters the first sub-branch and the second sub-branch respectively, and the current directions on the first sub-branch and the second sub-branch are opposite, and the electric fields generated by the first sub-branch and the second sub-branch suppress each other to prevent the current from coupling to the second antenna. Similarly, when the second antenna is working, the current from the second antenna enters the first sub-branch and the second sub-branch respectively, and the current directions on the first sub-branch and the second sub-branch are opposite, and the electric fields generated by the first sub-branch and the second sub-branch suppress each other to prevent the current from coupling to the first antenna. In this way, mutual interference between the first antenna and the second antenna can be avoided, and the isolation between the first antenna and the second antenna is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the positions of the first antenna and the second line according to an embodiment of the utility model;

[0018] Figure 2 is a schematic structural diagram of an electronic device according to an embodiment of the utility model;

[0019] Figure 3 is a structural schematic diagram of an antenna assembly according to an embodiment of the utility model;

[0020] Figure 4 is a schematic diagram of current transmission when the antenna assembly according to an embodiment of the utility model is working;

[0021] Figure 5 This is the isolation curve without setting the return branch;

[0022] Figure 6 It is an isolation curve diagram of the antenna assembly according to an embodiment of the utility model.

[0023] Explanation of the reference numerals: 10: electronic device; 110: first antenna; 111: radiation branch; 112: grounding branch; 113: feeding branch; 120: second antenna; 130: floor; 140: return branch; 141: first sub-branch; 142: second sub-branch; 143: first connecting branch; 144: second connecting branch; 145: third sub-branch; 146: fourth sub-branch; 147: first attenuation device; 148: second attenuation device; 149: third attenuation device; 150: drainage branch; 151: first drainage branch; 152: middle branch; 153: second drainage branch. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0026] With the rapid development of the Internet of Everything communication, people's pursuit of smart life is getting higher and higher. More and more wireless electronic devices are connected to the Internet, such as doorbells, door locks, NVRs, pet feeding machines, network cameras, etc. The colorful wireless terminal devices have become the real carriers of the Internet of Everything. As the carrier of wireless communication, the antenna is responsible for the reception and transmission of electromagnetic waves, which is directly related to the wireless experience. Therefore, in order to achieve faster and larger capacity wireless communication, WLAN MIMO communication came into being, requiring the terminal device to have a multiple-input multiple-output (MIMO) antenna layout to achieve multi-link transmission and reception of data streams. The number of terminal antennas increases, the distance between the two antennas is obviously close, and many of them are MIMO antennas of the same frequency, which will inevitably cause mutual interference between the antennas, affect the antenna radiation effect, and significantly reduce the terminal rate. This embodiment provides an antenna assembly that can ensure the isolation index between two antennas. The antenna assembly can be integrated in an electronic device.

[0027] Please follow Figure 1 The embodiment of the utility model provides an electronic device 10, which may include: a smart doorbell, a smart door lock, a network video recorder (NVR), a pet feeding machine, a mobile phone, a tablet computer, and other devices that realize data transmission or networking in a wireless manner.

[0028] The electronic device 10 includes an antenna assembly and a floor 130. The antenna assembly can be used to transmit and / or receive wireless signals. The antenna assembly is arranged on the floor 130 to form an antenna clearance for facilitating signal radiation. The antenna assembly includes a first antenna 110 and a second antenna 120. The first antenna 110 and the second antenna 120 are arranged at an interval. The first antenna 110 and the second antenna 120 can be used to transmit and / or receive wireless signals. Among them, the electronic device 10 can be a WLAN device with multiple antennas at the same frequency. A decoupling network can be added to the mainboard of the electronic device 10, and a coupling current attenuator can be configured to achieve a freely controlled decoupling effect and ensure the integrity of the mainboard layout.

[0029] It is understandable that the first antenna 110 and the second antenna 120 can both be wireless local area network (WLAN) antennas, Bluetooth antennas, cellular antennas, etc. Among them, the first antenna 110 and the second antenna 120 can be the same type of antennas, such as the first antenna 110 and the second antenna 120 can both be wireless local area network antennas; or the first antenna 110 and the second antenna 120 are different types of antennas, such as the first antenna 110 is a wireless local area network antenna and the second antenna 120 is a cellular antenna. The embodiment of the utility model does not limit the first antenna 110 and the second antenna 120.

[0030] The embodiments of the present application do not limit the structure of the first antenna 110 and the second antenna 120. By way of example, the first antenna 110 and the second antenna 120 may include a monopole antenna, a dipole antenna, an inverted F antenna (PIFA antenna), a slot antenna, etc. The structures of the first antenna 110 and the second antenna 120 may be the same or different.

[0031] In an implementation in which the first antenna 110 and the second antenna 120 have the same structure, the first antenna 110 and the second antenna 120 may both be inverted F antennas. Exemplarily, the first antenna 110 may include a first inverted F antenna, and the second antenna 120 may include a second inverted F antenna. The first inverted F antenna and the second inverted F antenna may include a radiation branch 111, a ground branch 112, and a feed branch 113. The ground branch 112 and the feed branch 113 are arranged substantially in parallel, and the ground branch 112 and the feed branch 113 intersect with the radiation branch 111. In some implementations, the first inverted F antenna and the second inverted F antenna may be symmetrically arranged.

[0032] Please refer to Figure 2 and Figure 3 In an embodiment of the utility model, the antenna assembly also includes a return branch 140, and the return branch 140 is arranged between the first antenna 110 and the second antenna 120; the return branch 140 includes a first sub-branch 141 and a second sub-branch 142 arranged at intervals, and the first sub-branch 141 and the second sub-branch 142 are both electrically connected to the first antenna 110 and the second antenna 120, and the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite.

[0033] It can be understood that in the implementation method where the first antenna 110 includes a first inverted-F antenna and the second antenna 120 includes a second inverted-F antenna, the first sub-branch 141 can be electrically connected to the intersection of the ground branch 112 and the radiation branch 111 in the first inverted-F antenna, the second sub-branch 142 can be electrically connected to the intersection of the ground branch 112 and the radiation branch 111 in the second inverted-F antenna, and the first sub-branch 141 and the second sub-branch 142 are electrically connected to achieve electrical connection between the return branch 140 and the branches of the first antenna 110 and the second antenna 120.

[0034] In the embodiment of the present application, when the first antenna 110 is working, the current from the first antenna 110 enters the first sub-branch 141 and the second sub-branch 142 respectively, and the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite, and the electric fields generated by the first sub-branch 141 and the second sub-branch 142 suppress each other to prevent the current from coupling to the second antenna 120. Similarly, when the second antenna 120 is working, the current from the second antenna 120 enters the first sub-branch 141 and the second sub-branch 142 respectively, and the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite, and the electric fields generated by the first sub-branch 141 and the second sub-branch 142 suppress each other to prevent the current from coupling to the first antenna 110. In this way, mutual interference between the first antenna 110 and the second antenna 120 can be avoided, and the isolation between the first antenna 110 and the second antenna 120 is improved.

[0035] In the antenna assembly in the embodiment of the present application, the first antenna 110 and the second antenna 120 are arranged at intervals, and the return branch 140 is arranged between the first antenna 110 and the second antenna 120; the return branch 140 includes a first sub-branch 141 and a second sub-branch 142 arranged at intervals, the first sub-branch 141 and the second sub-branch 142 are both electrically connected to the first antenna 110 and the second antenna 120, the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite, the electric fields generated by the first sub-branch 141 and the second sub-branch 142 suppress each other to prevent the first antenna 110 and the second antenna 120 from interfering with each other, thereby improving the isolation between the first antenna 110 and the second antenna 120.

[0036] Continue to refer to Figure 2 and Figure 3 In some embodiments, the antenna assembly also includes a drainage branch 150, which extends from the first antenna 110 to the second antenna 120, one end of the drainage branch 150 is electrically connected to the first antenna 110, and the other end of the drainage branch 150 is electrically connected to the second antenna 120, and the first sub-branch 141 and the second sub-branch 142 are both electrically connected to the drainage branch 150.

[0037] With such arrangement, the first sub-branch 141 and the second sub-branch 142 can be electrically connected to the first antenna 110 and the second antenna 120 through the drainage branch 150 , which has a simple structure and is easy to manufacture.

[0038] In some embodiments, the drainage branch 150 includes a first drainage branch 151, an intermediate branch 152 and a second drainage branch 153 which are arranged in sequence from the first antenna 110 to the second antenna 120; the antenna assembly also includes a first attenuation device 147 and a second attenuation device 148, one end of the first drainage branch 151 is electrically connected to the first antenna 110, the first drainage branch 151 is electrically connected to the intermediate branch 152 through the first attenuation device 147, one end of the second drainage branch 153 is electrically connected to the second antenna 120, and the second drainage branch 153 is electrically connected to the intermediate branch 152 through the second attenuation device 148; the first attenuation device 147 and the second attenuation device 148 are used to reduce the amplitude of the current.

[0039] Through the above configuration, the first attenuation device 147 and the second attenuation device 148 can reduce the amplitude of the current to attenuate the energy entering the return branch 140 .

[0040] In some embodiments, the first attenuation device 147 and the second attenuation device 148 both include resistors, and the resistance of the first attenuation device 147 and the second attenuation device 148 is 8Kohm-12Kohm (such as 8Kohm, 10Kohm, 12Kohm, etc.), which has a simple structure and is easy to manufacture.

[0041] In the above implementation, the first attenuation device 147 and the second attenuation device 148 may both include chip resistors to facilitate miniaturization and lightweighting of the antenna assembly. Of course, the first attenuation device 147 and the second attenuation device 148 may also be other devices with a certain resistance value, and the embodiment of the utility model is not limited to this.

[0042] In some embodiments, the first sub-branch 141 and the second sub-branch 142 are arranged in parallel, and the first sub-branch 141 and the second sub-branch 142 both extend from the first antenna 110 to the second antenna 120; the end of the first sub-branch 141 close to the first antenna 110 is electrically connected to the drainage branch 150 through the first connecting branch 143, and the end of the second sub-branch 142 close to the second antenna 120 is electrically connected to the drainage branch 150 through the second connecting branch 144.

[0043] The first sub-branch 141 and the second sub-branch 142 are arranged in parallel and spaced apart, and the first sub-branch 141 and the second sub-branch 142 at least partially overlap. The first connecting branch 143 can be arranged at the left end of the first sub-branch 141, and the first connecting branch 143 is perpendicular to the first sub-branch 141 and the middle branch 152, the top of the first connecting branch 143 is connected to the left end of the first sub-branch 141, and the bottom of the first sub-branch 141 is connected to the middle branch 152. The second connecting branch 144 is perpendicular to both the first sub-branch 141 and the middle branch 152, the top of the second connecting branch 144 is connected to the right end of the second sub-branch 142, and the bottom of the second connecting branch 144 is connected to the middle branch 152.

[0044] Continue to refer to Figure 2 and Figure 3 In some embodiments, the antenna assembly further includes a third attenuation device, and the second connecting branch 144 is electrically connected to the drainage branch 150 through the third attenuation device, and the third attenuation device is used to reduce the amplitude of the current.

[0045] With such configuration, the third attenuation device reduces the current amplitude, and can further attenuate the energy entering the return branch 140 .

[0046] Exemplarily, the third attenuation device may include a device with a certain resistance value such as a chip resistor, which is not limited in the embodiment of the utility model. Exemplarily, the resistance value of the third attenuation device is 8Kohm-12Kohm (such as 8Kohm, 10Kohm, 12Kohm, etc.).

[0047] In some embodiments, the return branch 140 also includes a third sub-branch 145 and a fourth sub-branch 146 arranged between the first sub-branch 141 and the second connecting branch 144, and the third sub-branch 145 and the fourth sub-branch 146 are arranged in parallel and spaced apart, and the extension direction of the third sub-branch 145 and the fourth sub-branch 146 is parallel to the extension direction of the first sub-branch 141; the end of the fourth sub-branch 146 close to the second connecting branch 144 is electrically connected to the drainage branch 150, and the end of the third sub-branch 145 close to the first connecting branch 143 is electrically connected to the second sub-branch 142; the current directions on the third sub-branch 145 and the fourth sub-branch 146 are opposite.

[0048] With such a configuration, the current directions on the third sub-branch 145 and the fourth sub-branch 146 are opposite, and the electric fields generated by the third sub-branch 145 and the fourth sub-branch 146 suppress each other, so as to further prevent mutual interference between the first antenna 110 and the second antenna 120, and further improve the isolation between the first antenna 110 and the second antenna 120.

[0049] Exemplarily, the fourth sub-branch 146 and the first sub-branch 141 may be located on the same straight line, the second sub-branch 142 is located on the side of the first sub-branch 141 and the fourth sub-branch 146 away from the middle branch 152 , and the third sub-branch 145 is located between the fourth sub-branch 146 and the middle branch 152 .

[0050] Please refer to Figure 2 and Figure 4 When the first antenna 110 is working, the current from the first antenna 110 passes through the first drainage branch and the first attenuation device, and then enters the first sub-branch 141 and the second sub-branch 142 through the intermediate branch, and the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite, and the electric fields generated by the first sub-branch 141 and the second sub-branch 142 suppress each other to prevent the current from coupling to the second antenna 120. Similarly, when the second antenna 120 is working, the current from the second antenna 120 passes through the second drainage branch and the second attenuation device, and then enters the first sub-branch 141 and the second sub-branch 142 through the intermediate branch, and the current directions on the first sub-branch 141 and the second sub-branch 142 are opposite, and the electric fields generated by the first sub-branch 141 and the second sub-branch 142 suppress each other to prevent the current from coupling to the first antenna 110. In this way, mutual interference between the first antenna 110 and the second antenna 120 can be avoided, and the isolation between the first antenna 110 and the second antenna 120 is improved.

[0051] Figure 5 This is the isolation curve without setting the return branch; Figure 6 is an isolation curve diagram of the antenna assembly according to the embodiment of the utility model, compared with Figure 5 and Figure 6 It can be seen that the isolation between the first antenna and the second antenna in the antenna assembly of the embodiment of the utility model can be improved by about 10 dB.

[0052] In some embodiments, there are multiple return branches 140, and the multiple return branches 140 are arranged at intervals between the first antenna 110 and the second antenna 120. Each return branch 140 can prevent the first antenna 110 and the second antenna 120 from interfering with each other, so as to further improve the isolation between the first antenna 110 and the second antenna 120.

[0053] Exemplarily, there may be two return branches 140, and the two return branches 140 are sequentially arranged along the extension direction of the middle branch 152. The two sub-branches may share a second connecting branch 144 and a third attenuation device to simplify the structure of the antenna assembly. Of course, in other implementations, the number of return branches 140 may also be three, four, etc., and the embodiment of the utility model is not limited to this.

[0054] In the aforementioned embodiment, the antenna assembly includes a first antenna and a second antenna; a decoupling network, i.e., a return branch, is added between the first antenna and the second antenna, and the decoupling network includes a coupling drainage branch, a coupling current attenuator, and a coupling current return branch. The electrical size of the coupling drainage branch corresponds to the frequency wavelength of the required decoupling current, and the coupling current attenuator is an energy attenuation type device, such as a 10kohm chip resistor. The coupling current return branch utilizes the principle of reverse current flow and mutual suppression of electric fields to achieve mutual weakening of the coupling field, ultimately achieving the purpose of reducing antenna coupling and improving the isolation between antennas.

[0055] Specific implementation method: The two antennas are in the form of PIFA or monopole antennas, and a drainage branch extends from the antenna ground end to guide the high-frequency current of the ground end of the first antenna to the decoupling network. Before entering the decoupling network, the high-frequency current at the ground end introduced through the drainage branch first passes through an attenuation device, such as a 10Kohm resistor, to weaken the high-frequency current intensity; after the high-frequency current passes through the attenuation resistor, it enters the return branch. The current return branch uses the opposite direction of the current flow and the opposite direction of the induced electric field. The return current induced electric field weakens the original high-frequency current induced electric field, thereby further reducing the high-frequency current intensity at the ground end; after the high-frequency current at the ground end passes through the return branch, it passes through another attenuation device to attenuate the current intensity, and finally passes through the drainage branch to reach the ground end of the second antenna. After passing through the decoupling network, the high-frequency current intensity at the ground end of the first antenna is greatly weakened, and the high-frequency current reaching the ground end of the second antenna has a greatly reduced impact on the second antenna, thereby achieving the expectation of improving the isolation between the first antenna and the second antenna. At the same time, the high-frequency current at the ground end of the second antenna passes through the same path and reaches the ground end of the first antenna in the opposite direction. Similarly, after the high-frequency current at the ground end of the second antenna passes through the decoupling network, the impact of the high-frequency current on the first antenna is greatly reduced, achieving the expectation of improving the isolation between antennas. Among them, the first antenna and the second antenna are laid out on the same ground. The drainage branch layout can be a straight line, a zigzag line, etc., and the electrical length is determined according to the wavelength. The return branch contains energy-consuming resistor devices. The decoupling network can include multiple energy-consuming resistor devices to reduce the intensity of the coupled high-frequency current; the decoupling network can optimize the isolation between the two antennas by about 10dB, with significant effects.

[0056] In the above embodiments, the frequency band that needs to be decoupled can be adjusted by adjusting the electrical length of the drainage branch, and the decoupling is adjustable; the energy-consuming resistor device can efficiently consume the energy of the high-frequency coupling current, and will not generate standing waves and board-end radiation; the return branch adds energy-consuming devices, and the decoupling ability is stronger by utilizing the return and energy consumption, and the decoupling is adjustable. Under the premise of ensuring the integrity of the mainboard layout, the decoupling between antennas of the same frequency is achieved, and the isolation between antennas is improved; the high-frequency current drainage branch is added, and the drainage branch can adjust the electrical size and routing according to the frequency band to achieve controllable decoupling; the coupling current attenuator is added, and the improvement effect of decoupling can be manually controlled.

[0057] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An antenna assembly, characterized in that: include: A first antenna and a second antenna, wherein the first antenna and the second antenna are arranged at an interval; A return branch, wherein the return branch is arranged between the first antenna and the second antenna; the return branch includes a first sub-branch and a second sub-branch arranged at intervals, the first sub-branch and the second sub-branch are both electrically connected to the first antenna and the second antenna, and the current directions on the first sub-branch and the second sub-branch are opposite.

2. The antenna assembly according to claim 1, characterized in that: The antenna assembly also includes a drainage branch, which extends from the first antenna to the second antenna, one end of the drainage branch is electrically connected to the first antenna, and the other end of the drainage branch is electrically connected to the second antenna, and the first sub-branch and the second sub-branch are both electrically connected to the drainage branch.

3. The antenna assembly according to claim 2, characterized in that: The drainage branch includes a first drainage branch, an intermediate branch and a second drainage branch which are arranged in sequence from the first antenna to the second antenna; the antenna assembly also includes a first attenuation device and a second attenuation device, one end of the first drainage branch is electrically connected to the first antenna, the first drainage branch is electrically connected to the intermediate branch through the first attenuation device, one end of the second drainage branch is electrically connected to the second antenna, and the second drainage branch is electrically connected to the intermediate branch through the second attenuation device; the first attenuation device and the second attenuation device are used to reduce the amplitude of the current.

4. The antenna assembly according to claim 3, characterized in that: The first attenuation device and the second attenuation device both include resistors, and the resistance values ​​of the first attenuation device and the second attenuation device are 8Kohm-12Kohm.

5. The antenna assembly according to any one of claims 1 to 4, characterized in that: There are a plurality of return branches, and the plurality of return branches are arranged at intervals between the first antenna and the second antenna.

6. The antenna assembly according to any one of claims 2 to 4, characterized in that: The first sub-branch and the second sub-branch are arranged in parallel, and both the first sub-branch and the second sub-branch extend from the first antenna to the second antenna; the end of the first sub-branch close to the first antenna is electrically connected to the drainage branch through the first connecting branch, and the end of the second sub-branch close to the second antenna is electrically connected to the drainage branch through the second connecting branch.

7. The antenna assembly according to claim 6, characterized in that: The antenna assembly also includes a third attenuation device, the second connecting branch is electrically connected to the drainage branch via the third attenuation device, and the third attenuation device is used to reduce the amplitude of the current.

8. The antenna assembly according to claim 6, characterized in that: The return branch also includes a third sub-branch and a fourth sub-branch arranged between the first sub-branch and the second connecting branch, the third sub-branch and the fourth sub-branch are arranged in parallel and at intervals, and the extension direction of the third sub-branch and the fourth sub-branch is parallel to the extension direction of the first sub-branch; one end of the fourth sub-branch close to the second connecting branch is electrically connected to the drainage branch, and one end of the third sub-branch close to the first connecting branch is electrically connected to the second sub-branch; the current directions on the third sub-branch and the fourth sub-branch are opposite.

9. The antenna assembly according to any one of claims 1 to 4, characterized in that: The first antenna includes a first inverted-F antenna, a ground branch of the first inverted-F antenna is electrically connected to the first sub-branch; the second antenna includes a second inverted-F antenna, a ground branch of the second inverted-F antenna is electrically connected to the second sub-branch.

10. An electronic device, characterized in that: It comprises a radio frequency circuit and the antenna assembly as claimed in any one of claims 1 to 9, wherein the radio frequency circuit is electrically connected to both the first antenna and the second antenna.

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