Antenna assembly and electronic device

Abstract

The application discloses an antenna assembly and an electronic device, and belongs to the field of communication devices.The antenna assembly comprises an antenna, an electric connecting piece and a wave-absorbing structure piece.The antenna is configured to be fixed to the outer periphery of a frame, and the antenna is electrically connected with the conductive part of the frame.The electric connecting piece is arranged between the display screen of the electronic device and the frame.The conductive part of the frame and the conductive part of the display screen are configured to be electrically connected through the electric connecting piece.The conductive part of the display screen, the conductive part of the frame and the electric connecting piece form a resonant cavity.The wave-absorbing structure piece is arranged in the resonant cavity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication equipment, and particularly relates to an antenna assembly and electronic equipment. BACKGROUND

[0002] With the continuous improvement of the functions of electronic equipment such as smart phones, the radio frequency signal strength of the electronic equipment is one of the important performances of the electronic equipment. In the current antenna, the grounding connection between the metal structural members such as the screen and the frame is usually formed by using an electrical connector, but if the electrical connector is oxidized or loose, the electrical connector will appear the phenomenon of poor contact, and then the antenna will produce passive intermodulation products at the connection position of the electrical connector in the process of transmitting signals, which will fall into the receiving frequency band of the antenna and seriously affect the receiving sensitivity of the antenna. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an antenna assembly and electronic equipment to solve the problem that the radio frequency band of the antenna falls into the natural frequency of the resonant cavity, which adversely affects the performance of the antenna.

[0004] In a first aspect, the embodiments of the present application disclose an antenna assembly, which comprises an antenna, an electrical connector and a wave-absorbing structural member, the antenna is configured to be fixed to the outer periphery of a frame, and the antenna is electrically connected with the conductive part of the frame, the electrical connector is arranged between the display screen and the frame of an electronic equipment, the conductive part of the frame and the conductive part of the display screen are configured to be electrically connected through the electrical connector, and the conductive part of the display screen, the conductive part of the frame and the electrical connector form a resonant cavity, and the wave-absorbing structural member is arranged in the resonant cavity.

[0005] In a second aspect, the embodiments of the present application disclose an electronic equipment, which comprises a display screen, a frame and the above-mentioned antenna assembly, the antenna is fixed to the outer periphery of the frame, and the antenna is electrically connected with the conductive part of the frame, the electrical connector is arranged between the frame and the display screen, and the conductive part of the display screen and the conductive part of the frame are electrically connected through the electrical connector.

[0006] The embodiment of the present application discloses an antenna assembly which can be applied to an electronic device. The antenna in the antenna assembly can be fixedly connected to the outer periphery of the frame of the electronic device. The frame can form an electrical connection relationship with the display screen of the electronic device through the electrical connector in the antenna assembly. The conductive part of the frame, the conductive part of the display screen and the electrical connector can form a resonant cavity. Moreover, the antenna assembly in the embodiment of the present application further comprises a wave-absorbing structure. The wave-absorbing structure is arranged in the resonant cavity. The dielectric constant and / or the magnetic permeability in the resonant cavity are changed by using the wave-absorbing structure. At least part of the stray wave is absorbed by using the wave-absorbing structure, so that the current coupled to the electrical connector is reduced, thereby reducing the risk caused by passive intermodulation. Meanwhile, the wave-absorbing structure can also change the natural frequency of the resonant cavity, so that the radio frequency band of the antenna is located outside the natural frequency of the resonant cavity, thereby ensuring that the receiving performance of the antenna is good. BRIEF DESCRIPTION OF DRAWINGS

[0007] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0008] Figure 1 is a structural schematic diagram of an electronic device comprising an antenna assembly with poor performance;

[0009] Figure 2 is a structural schematic diagram of a technical solution for solving the poor performance of the antenna assembly;

[0010] Figure 3 is a structural schematic diagram of an electronic device disclosed by the embodiment of the present application;

[0011] Figure 4 is Figure 3 is a sectional schematic diagram of the electronic device shown in another direction;

[0012] Figure 5 is a sectional schematic diagram of another structure of the electronic device disclosed by the embodiment of the present application;

[0013] Figure 6 is a schematic diagram of another structure of the electronic device disclosed by the embodiment of the present application;

[0014] Figure 7 is Figure 6 is a sectional schematic diagram of the electronic device shown in another direction;

[0015] Figure 8 is a structural schematic diagram of the display screen in the electronic device disclosed by the embodiment of the present application;

[0016] Figure 9is a comparison chart of return loss curves of Ant A with and without the conductive structure;

[0017] Figure 10 is a comparison chart of radiation efficiency of Ant A with and without the conductive structure;

[0018] Figure 11 is a comparison chart of current values through the first electrical connection when Ant A is excited with and without the conductive structure;

[0019] Figure 12 is a comparison chart of current values through the second electrical connection when Ant A is excited with and without the conductive structure;

[0020] Figure 13 is a comparison chart of return loss curves of Ant B with and without the conductive structure;

[0021] Figure 14 is a comparison chart of radiation efficiency of Ant B with and without the conductive structure;

[0022] Figure 15 is a comparison chart of current values through the first electrical connection when Ant B is excited with and without the conductive structure;

[0023] Figure 16 is a comparison chart of current values through the second electrical connection when Ant B is excited with and without the conductive structure;

[0024] Figure 17 is a comparison chart of current values when Ant A and Ant B are excited respectively with the conductive structure;

[0025] Figure 18 is a comparison chart of return loss curves of Ant A under different conditions;

[0026] Figure 19 is a comparison chart of radiation efficiency of Ant A under different conditions;

[0027] Figure 20 is a comparison chart of current values through the first electrical connection when Ant A is excited under different conditions;

[0028] Figure 21 is a comparison chart of current values through the second electrical connection when Ant A is excited under different conditions;

[0029] Figure 22 is a comparison chart of return loss curves of Ant B under different conditions;

[0030] Figure 23 is a comparison chart of radiation efficiency of Ant B under different conditions;

[0031] Figure 24 is a comparison chart of current values through the first electrical connection when Ant B is excited in different cases;

[0032] Figure 25 is a comparison chart of current values through the second electrical connection when Ant B is excited in different cases.

[0033] Legend:

[0034] 10-conductive structure,

[0035] 110-antenna, 120-seam, 130-feed point,

[0036] 201-electrical connection, 210-first electrical connection, 220-second electrical connection,

[0037] 300-wave-absorbing structure, 310-wave-absorbing structure layer,

[0038] 400-frame,

[0039] 500-display screen, 510-touch panel, 520-touch module, 530-metal support. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0041] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0042] The folding mechanism and electronic device provided by the embodiments of the present application will be described in detail below in conjunction with the drawings and specific embodiments and application scenarios.

[0043] As Figures 1 to 8As shown, the embodiment of the present application discloses an antenna assembly which can be applied in an electronic device. The electronic device can specifically include a frame 400 and a display screen 500. At least a part of the frame 400 is arranged in a stacked manner with the display screen 500. Of course, in order to ensure the ability of mutual electrical connection between the display screen 500 and the frame 400, a conductive part with conductive ability needs to be arranged in the display screen 500, which can be a metal support 530. Correspondingly, the frame 400 also includes a conductive part with conductive ability, which can be the part arranged in a stacked manner with the display screen 500. The outer periphery of the frame 400 can be a metal structure or a structure formed of non-conductive materials such as plastic. In addition, the electronic device can also include devices such as a shell, a processor and a camera module. For the sake of brevity, they will not be introduced one by one here.

[0044] In the antenna assembly of the electronic device, as shown, Figure 1 The antenna assembly includes an antenna 110 and an electrical connecting part 201. In the process of assembling the antenna assembly, the antenna 110 can be fixedly connected to the outer periphery of the frame 400, and the antenna 110 and the conductive part of the frame 400 are electrically connected to form a good electrical connection relationship between the antenna 110 and the frame 400. The specific structure and form of the antenna 110 can be determined according to actual needs, which will not be limited here. In addition, the antenna 110 can be formed in an integrated manner together with the frame 400, and a groove structure is etched at the outer peripheral edge of the frame 400 to form a usable antenna form. This antenna 110 is actually a metal frame antenna, and the connecting rib of the frame 400 corresponds to the ground part of the antenna 110. Alternatively, the antenna 110 can also be an FPC antenna. In this case, the outer periphery of the frame 400 can be a plastic structure, and the antenna 110 can form an electrical connection relationship with the conductive part of the frame 400 through the conductive part, so that the antenna 110 can also achieve the purpose of grounding through the frame 400. For the sake of description, the metal frame antenna will be taken as an example in the following description. In addition, as shown, Figure 1 The antenna 110 can include multiple antennas of different frequency bands, and the antennas 110 can be separated from each other by a break 120. Each antenna 110 is provided with a feed point 130.

[0045] The electric connection piece 201 is a device with electric conductivity, which can be made of metal or other materials, and has various structural forms, which are not limited here. In the embodiments of the present application, the electric connection piece 201 can be a screw or a spring piece. In another embodiment of the present application, the electric connection piece 201 can be electrically conductive foam, so as to prevent the electric connection piece 201 clamped between the frame 400 and the display screen 500 from generating a large extrusion force on the display screen 500, causing the display screen 500 to have water ripples, and thus ensuring that the display screen 500 has a strong display effect and a long service life. In addition, during the working process of the antenna assembly, an electric current can also be generated at the electric connection piece 201. In order to ensure that the electric connection piece 201 has strong electric conductivity, the electric connection piece 201 can be gold-plated to improve the electric conductivity of the electric connection piece 201. In addition, during the process of arranging the electric connection piece 201, the electric connection piece 201 can be arranged at a position close to the edge of the frame 400, and the electric connection piece 201 is close to the ground position of the antenna 110. More specifically, the distance between the electric connection piece 201 and the outer edge of the antenna 110 arranged on the outer periphery of the frame 400 can be less than L1, and L1 can be 20 mm, further improving the overall performance of the antenna 110.

[0046] The electric connection piece 201 is arranged between the display screen 500 and the frame 400 of the electronic device, and the frame 400 and the display screen 500 are electrically connected through the electric connection piece 201, so as to use the electric connection piece 201 as the grounding point of the antenna 110. At the same time, the frame 400, the display screen 500 and the electric connection piece 201 form a resonant cavity, which can cause the radio frequency band of the antenna 110 to coincide with the natural frequency of the resonant cavity, and adversely affect the performance of the antenna 110.

[0047] Based on this, as shown in Figure 2 The electric connection piece 201 is arranged between the display screen 500 and the frame 400 of the electronic device, and the frame 400 and the display screen 500 are electrically connected through the electric connection piece 201, so as to use the electric connection piece 201 as the grounding point of the antenna 110. At the same time, the frame 400, the display screen 500 and the electric connection piece 201 form a resonant cavity, which can cause the radio frequency band of the antenna 110 to coincide with the natural frequency of the resonant cavity, and adversely affect the performance of the antenna 110.

[0048] However, in the above scheme, the electrically conductive structure 10 needs to be added first, and the electrically conductive structure 10 needs to have good electric connection performance, which can require gold plating or other methods to enhance the electric conductivity of the electrically conductive structure 10. On the one hand, this can cause the cost of the electronic device to rise, and on the other hand, it can also increase the assembly difficulty of the electronic device, and because the number of components connected to each other in the electronic device increases, the risk of component failure in the electronic device increases.

[0049] Based on this, in the embodiments of the present application, as shown in Figure 3As shown, in addition to the antenna 110 and the electrical connector 201, the antenna assembly can further include a wave-absorbing structural member 300, which is a structural member made of a wave-absorbing material and has the ability to absorb electromagnetic waves, and as shown, Figure 3 As shown, the wave-absorbing structural member 300 is arranged in the resonant cavity, so that the medium in the resonant cavity changes, and in turn the dielectric properties and the magnetic field distribution in the resonant cavity change, so that the natural frequency of the resonant cavity changes. Specifically, the wave-absorbing structural member 300 can lower the natural frequency of the resonant cavity, so that the radio frequency band of the antenna 110 is located outside the natural frequency of the resonant cavity, thereby eliminating the need to additionally provide the conductive structural member 10 that needs to be plated with gold in the strong electric field area of the resonant cavity, and also ensuring that the resonant cavity does not adversely affect the performance of the antenna 110, so that the overall performance of the antenna 110 is better. At the same time, the wave-absorbing structural member 300 can absorb at least part of the spurious waves, thereby reducing the current coupled to the electrical connector 201, and in turn reducing the risk of passive intermodulation.

[0050] The embodiment of the present application discloses an antenna assembly which can be applied in an electronic device. The antenna 110 in the antenna assembly can be fixedly connected to the outer periphery of the frame 400 of the electronic device, and the frame 400 can form an electrical connection relationship with the display screen 500 of the electronic device through the electrical connector 201 in the antenna assembly, and the conductive part of the frame 400, the conductive part of the display screen and the electrical connector 201 can form a resonant cavity. Moreover, the antenna assembly in the embodiment of the present application further includes a wave-absorbing structural member 300, and the wave-absorbing structural member 300 is arranged in the resonant cavity, so as to change the dielectric constant and / or the magnetic permeability in the resonant cavity by using the wave-absorbing structural member 300, and to absorb at least part of the spurious waves by using the wave-absorbing structural member 300, thereby reducing the current coupled to the electrical connector 201, and in turn reducing the risk of passive intermodulation. At the same time, the wave-absorbing structural member 300 can also change the natural frequency of the resonant cavity, so that the radio frequency band of the antenna 110 is located outside the natural frequency of the resonant cavity, thereby ensuring that the receiving performance of the antenna 110 is better.

[0051] In order to further ensure that the antenna 110 has better radio frequency return effect and better suppress the spurious waves of the resonant cavity, optionally, the antenna assembly includes a plurality of electrical connectors 201. As described above, during the working process of the above-mentioned antenna assembly, current may still be generated on the electrical connector 201, which makes the plurality of electrical connectors 201 also need to have strong conductive performance, so that the plurality of electrical connectors 201 also need to use gold plating or the like to improve their own conductive performance. Based on this, in the embodiment, as shown, Figure 3 As shown, the spacing between at least one of the plurality of electrical connectors 201 and the wave-absorbing structural member 300 is less than L2, and L2 can be 20 mm.

[0052] In the technical solution, the wave-absorbing structure 300 can change the magnetic field around the wave-absorbing structure 300, specifically, the magnetic field around the wave-absorbing structure 300 can be reduced, based on the magnetic field loop integral theory, the electric field intensity around the wave-absorbing structure 300 is reduced, so that the current near the wave-absorbing structure 300 is further reduced. Based on this, by making the distance between at least one of the plurality of electrical connectors 201 and the wave-absorbing structure 300 relatively small, specifically, the distance between the electrical connector 201 and the wave-absorbing structure 300 is less than 20 mm, the wave-absorbing structure 300 is used to further reduce the current on the electrical connector 201, so that the lower limit of the demand for the electrical conductivity of the electrical connector 201 is reduced, and the electrical connector 201 does not need to be plated with gold to improve the electrical conductivity, thereby reducing the cost and reducing the difficulty of processing and assembly.

[0053] In addition, considering the assembly process of the components, any electrical connector 201 can be spaced apart from the wave-absorbing structure 300, that is, any electrical connector 201 has a gap greater than zero between the wave-absorbing structure 300, so that there is an assembly tolerance between the components, reducing the assembly difficulty of the components. More specifically, the distance between any electrical connector 201 and the wave-absorbing structure 300 can be greater than 3 mm.

[0054] Further, the specific shape of the wave-absorbing structure 300 can be selected according to actual needs, which is not limited here, for example, the wave-absorbing structure 300 can be triangular, circular, oval or polygonal, etc. And the wave-absorbing structure 300 can be a closed ring structure, and can also be a ring structure with an opening. In an embodiment of the present application, the wave-absorbing structure 300 can be a rectangular structure, which can reduce the processing difficulty of the wave-absorbing structure 300, and can improve the adaptability of the wave-absorbing structure 300, and expand its application scenarios.

[0055] Optionally, as shown in Figure 4 The wave-absorbing structure 300 can be a single-layer structure, that is, the wave-absorbing structure 300 is an integral structure formed by the same material, and the processing difficulty and assembly difficulty of such a wave-absorbing structure 300 are relatively low.

[0056] In another embodiment of the present application, as shown in Figure 5 The wave-absorbing structure 300 can include a plurality of wave-absorbing structure layers 310, the plurality of wave-absorbing structure layers 310 are stacked along the stacking direction of the display screen 500 and the frame 400, and the electrical parameters of each wave-absorbing structure layer 310 are different. Wherein, the stacking direction of the display screen 500 and the frame 400 can also be considered as the thickness direction of the antenna 110, that is Figure 4The direction is Y. Furthermore, in this embodiment, the electrical parameters of each absorbing structure layer 310 are different. With this technical solution, the material of each absorbing structure layer 310 can be selected separately, expanding the selection range of the absorbing structure layer 310. Thus, the dielectric constant and / or permeability of each absorbing structure layer 310, as well as the size of each absorbing structure layer 310, can be flexibly selected according to actual needs. In this way, the absorbing structure component 300 formed by multiple absorbing structure layers 310 can be used as an integral structure to provide a frequency shift for the resonant cavity, thereby improving the performance of the antenna 110.

[0057] As described above, in setting the absorbing structure 300, the absorbing structure 300 can be a single-layer structure made of the same material, with fixed dielectric constant and permeability. In this case, the modulus of the dielectric constant and / or permeability of the absorbing structure 300 can be greater than 10 to ensure that the absorbing structure 300 has a more significant effect on the change in dielectric constant and / or permeability within the resonant cavity, further improving the absorbing structure 300's ability to shift the resonant cavity's natural frequency and ensuring that the resonant cavity does not adversely affect the performance of the antenna 110.

[0058] Alternatively, the absorbing structure 300 can be a multilayer structure formed by stacking various materials, and the dielectric constant and permeability of such absorbing structure 300 can be equivalent to a certain value. In this case, the modulus of the equivalent dielectric constant and / or equivalent permeability of the absorbing structure 300 can be greater than 10 to ensure that the absorbing structure 300 causes a more significant change in the dielectric constant and / or permeability within the resonant cavity, further improving the absorbing structure 300's ability to shift the natural frequency of the resonant cavity, and ensuring that the resonant cavity does not adversely affect the performance of the antenna 110.

[0059] In the above embodiments, regardless of whether the absorbing structure 300 is a single-layer structure or a multi-layer structure formed by multiple absorbing structure layers 310, the number of absorbing structure 300 can be one. This absorbing structure 300 is disposed within the resonant cavity to shift the frequency of the resonant cavity. Furthermore, by placing the absorbing structure 300 close to at least one of the multiple electrical connectors 201, the current on the electrical connectors 201 with relatively small spacing from the absorbing structure 300 can be relatively small.

[0060] However, when there is only one absorbing structure 300, its placement is always somewhat limited. Therefore, when there are multiple electrical connectors 201, such as... Figure 6As shown, the number of wave-absorbing structures 300 can be multiple, and each wave-absorbing structure 300 is arranged in the resonant cavity. During the assembly of the antenna assembly, each wave-absorbing structure 300 can be arranged between multiple electrical connectors 201, and the distance between any electrical connector 201 and at least one wave-absorbing structure 300 is less than 20 mm. More specifically, the distance between a certain electrical connector 201 and a certain wave-absorbing structure 300 can be L3, and L3 is 4 mm.

[0061] That is, in the present embodiment, by increasing the number of wave-absorbing structures 300 and arranging the wave-absorbing structures 300 and the electrical connectors 201 in cooperation, the magnetic field strength around each wave-absorbing structure 300 can be reduced by the wave-absorbing structure 300, so that the current on the multiple electrical connectors 201 arranged around the multiple wave-absorbing structures 300 is reduced. In addition, when the number of wave-absorbing structures 300 is multiple, the shape of any wave-absorbing structure 300 can be relatively regular, so as to ensure that the processing and assembly difficulty of any wave-absorbing structure 300 is relatively small.

[0062] Of course, in another embodiment of the present application, one or more wave-absorbing structures 300 of a specific shape can be designed according to the specific position of the multiple electrical connectors 201, so that the distance between the multiple electrical connectors 201 and the one or more wave-absorbing structures 300 is relatively smaller. By using this technical solution, the current on the multiple electrical connectors 201 can be further reduced, but the processing difficulty and assembly difficulty of the wave-absorbing structure 300 are relatively large, and the application limitation of the wave-absorbing structure 300 is relatively large. In the implementation process of the present application, the person skilled in the art can select different technical solutions according to the actual needs.

[0063] In order to further ensure that the wave-absorbing structure 300 has good ability to shift the resonant cavity frequency, further, the ratio of the area of the projection of the wave-absorbing structure 300 in the stacking direction of the frame 400 and the display screen 500 to the area of the projection of the resonant cavity in the aforementioned stacking direction is greater than one fifth. The wave-absorbing structure 300 can be a regular columnar structure, and the top surface or the bottom surface of the wave-absorbing structure 300, that is, Figure 3 The area of the surface displayed by the wave-absorbing structure 300 is the projection area of the wave-absorbing structure 300 in the stacking direction. The projection area of the resonant cavity in the aforementioned stacking direction can also be simplified as the area of the figure surrounded by the connecting lines between the multiple electrical connectors 201.

[0064] It should be noted that the aforementioned definition of the area of the resonant cavity is not the area of the resonant cavity in the true sense. The calculation method of the area of the resonant cavity is relatively complex due to the forming conditions of the resonant cavity. There may be a certain difference between the aforementioned alternative method and the true area of the resonant cavity, but the aforementioned difference is relatively small in order of magnitude compared with the area of the resonant cavity. Therefore, in order to more intuitively express the technical solution, the area calculated by the aforementioned calculation method is used as the theoretical area of the resonant cavity.

[0065] Further, in actual application, the area of the wave-absorbing structure 300 can be further increased to ensure that the ratio of the area of the wave-absorbing structure 300 to the true area of the resonant cavity is greater than one fifth, thereby ensuring that the wave-absorbing structure 300 has good ability to shift the frequency of the resonant cavity. More specifically, the ratio of the area of the wave-absorbing structure 300 to the area of the resonant cavity can be greater than one half. In this case, the shifting effect of the wave-absorbing structure 300 on the resonant cavity is more remarkable, and the performance of the antenna 110 can be greatly improved.

[0066] Further, the wave-absorbing structure 300 and the antenna 110 can have a spacing therebetween, and the spacing between the wave-absorbing structure 300 and the antenna 110 is greater than 10 mm. In this case, the assembly difficulty of the wave-absorbing structure 300 is relatively small, and the setting range of the position of each of the plurality of electrical connectors 201 is relatively large, so as to reduce the assembly difficulty of the entire antenna assembly.

[0067] Further, in the antenna assembly disclosed in the embodiments of the present application, the antenna 110 includes at least one of a GPS antenna, a WIFI antenna, a 2G antenna, a 3G antenna, a 4G antenna, a 5G antenna, and a millimeter wave antenna. More specifically, the antenna 110 can include any one of the aforementioned different types of antennas 110, thereby expanding the radio frequency band of the antenna 110 and improving the application range of the antenna 110.

[0068] As Figures 1 to 3As shown, each of the antennas 110 can include Ant (antenna) A and Ant B, which are located at opposite ends of the antenna 110, respectively, wherein Ant A is located at the side of the cavity bottom of the resonant cavity, and Ant B is located at the side of the cavity opening of the resonant cavity, and Ant A and Ant B can both work in the 1850-1990 MHz frequency band. Moreover, the plurality of electrical connectors 201 in the antenna assembly can include a first electrical connector 210 and a second electrical connector 220, wherein the first electrical connector 210 is located at the cavity bottom of the resonant cavity, and the second electrical connector 220 is arranged at the cavity opening of the resonant cavity. In addition, as described above, the conductive structural member 10 and each electrical connector 201 can be conductive foam, and thus the conductive structural member 10, the first electrical connector 210, and the second electrical connector 220 can be referred to as foam a, foam b, and foam c, respectively.

[0069] Figure 9 and Figure 10 is a comparison of the return loss curve and the radiation efficiency curve of Ant A in the antenna assembly with and without the conductive structural member 10. Among them, the triangular solid line corresponds to the case where the antenna assembly is provided with the conductive structural member 10, and the circular dotted line corresponds to the case where the antenna assembly is not provided with the conductive structural member 10. Figure 2 The return loss curve and the radiation efficiency curve of Ant A in the antenna assembly shown in the case where the conductive structural member 10 is provided. The circular dotted line corresponds to the case where the antenna assembly is not provided with the conductive structural member 10. Figure 1 The return loss curve and the radiation efficiency curve of Ant A in the antenna assembly shown in the case where the conductive structural member 10 is provided. The circular dotted line corresponds to the case where the antenna assembly is not provided with the conductive structural member 10.

[0070] Figure 11 and Figure 12 is a comparison of the current values on the first electrical connector 210 and the second electrical connector 220 when Ant A is excited in the antenna assembly with and without the conductive structural member 10. Among them, the triangular solid line corresponds to the case where the antenna assembly is provided with the conductive structural member 10, and the circular dotted line corresponds to the case where the antenna assembly is not provided with the conductive structural member 10.

[0071] In combination with Figure 9 and Figure 10As a result, although the setting of the conductive structural member 10 has no effect on the return loss and radiation efficiency of Ant A in the antenna assembly, the setting of the conductive structural member 10 slightly reduces the current through the first electrical connector 210 and the second electrical connector 220 in the 1850-1990MHz transmission frequency band when Ant A is excited, and the specific difference is about 20-60mA. Therefore, as described above, the setting of the conductive structural member 10 can effectively reduce the current on the first electrical connector 210 and the second electrical connector 220, thereby helping to achieve the purpose of reducing the risk of PIM (Passive Inter-Modulation) and RSE (Radiated Spurious Emission).

[0072] Further, Figures 13 to 16 The case where Ant B works in the 1850-1990MHz frequency band is shown. Figure 13 And Figure 14 The return loss curve and the radiation efficiency curve of Ant B in the antenna assembly with and without the conductive structural member 10 are shown. The solid line corresponds to the case where the antenna assembly has the conductive structural member 10. Figure 2 The return loss curve and the radiation efficiency curve of Ant B in the antenna assembly with the conductive structural member 10 are shown. The diamond dotted line corresponds to the case where the antenna assembly does not have the conductive structural member 10. Figure 1 The return loss curve and the radiation efficiency curve of Ant B in the antenna assembly without the conductive structural member 10 are shown.

[0073] Based on the illustration, it can be seen that in the case where the antenna assembly does not have the conductive structural member 10, Ant B has a resonance near 1850MHz, which is actually the inherent frequency of the resonance cavity formed by the frame 400, the display screen 500 and the plurality of electrical connectors 201, falling in the 1850-1990MHz transmission frequency band and causing efficiency loss. In the case where the antenna assembly has the conductive structural member 10, the resonance frequency of the above-mentioned resonance cavity is moved out of the band, generally to the position of 2200MHz, so that the frequency of the resonance cavity is in the non-required frequency band. In the working transmission frequency band near 1850MHz, the radiation efficiency of the antenna 110 is increased by 1.2dB.

[0074] Figure 15 And Figure 16 The current value through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited in the antenna assembly with and without the conductive structural member 10 is shown. The solid line corresponds to the case where the antenna assembly has the conductive structural member 10. Figure 2 The current value curve through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited in the antenna assembly with the conductive structural member 10 is shown. The diamond dotted line corresponds to the case where the antenna assembly does not have the conductive structural member 10. Figure 1The current value curve through the first electrical connecting member 210 and the second electrical connecting member 220 when Ant B is excited in the case where no conductive structural member 10 is arranged in the antenna assembly.

[0075] In combination Figure 13 and Figure 14 , in the case where the conductive structural member 10 is arranged in the antenna assembly, the radiation efficiency of Ant B is improved, and the current coupled on the first electrical connecting member 210 and the second electrical connecting member 220 is greatly reduced. Among them, the current of the first electrical connecting member 210 is reduced by 220 mA, and the current of the second electrical connecting member 220 is reduced by 110 mA, so that the PIM and RSE risks can be greatly reduced. In the case where no conductive structural member 10 is arranged in the antenna assembly, although the distance between the first electrical connecting member 210 and Ant B is large, the first electrical connecting member 210 is still coupled to a large current due to the effect of the resonant cavity, and the current peak value and the resonant cavity resonant frequency are basically aligned, resulting in high PIM and RSE risks of the antenna assembly.

[0076] In summary, in order to suppress the resonant cavity phenomenon, ensure high efficiency of the antenna 110, and reduce the working risk of EMC, the conductive structural member 10 can be used, and because the current on the conductive structural member 10 is relatively large, as shown in Figure 17 , the solid line corresponds to the case of exciting Ant A, and the dashed line corresponds to the case of exciting Ant B. Obviously, the current of the conductive structural member 10 is greater than 50 Ma near 1850 MHz, so it is necessary to enhance the conductivity of the conductive structural member 10 by gold plating or the like, thereby greatly increasing the cost of the antenna assembly, and making the connection relationship between the components in the antenna assembly more complex, and the failure risk of the antenna assembly higher.

[0077] In summary, in order to ensure the performance of the antenna 110 and ensure that the cost and failure risk of the antenna assembly are still relatively low, the application adds an absorbing structural member 300 in the antenna assembly. The absorbing structural member 300 can make the performance of the antenna 110 relatively good, and because the absorbing structural member 300 does not have an electrical connection or other relatively precise connection relationship with other structural members in the antenna assembly, the failure risk of the antenna assembly is relatively low, and the cost of the absorbing structural member 300 itself is also relatively low, so as not to cause the overall cost of the antenna assembly to rise too much.

[0078] Figures 18 to 21 shows the case where the antenna 110 Ant A works in the 1850 MHz-1990 MHz frequency band, wherein, Figure 18 and Figure 19 are the return loss curve and the radiation efficiency curve of Ant A corresponding to the case where the absorbing structural member 300 is arranged in the antenna assembly and the structure of the absorbing structural member 300 is different, and,Figure 18 and Figure 19 None of the shown antenna assemblies are provided with the conductive structure 10. Among them, the triangular solid line corresponds to the case where the double wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. Figure 6 The return loss curve and the radiation efficiency curve of Ant A in the case where the double wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. The square dotted line corresponds to the case where the single wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. Figure 3 The return loss curve and the radiation efficiency curve of Ant A in the case where the single wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. The circular dotted line corresponds to the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. Figure 6 The return loss curve and the radiation efficiency curve of Ant A in the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. Figure 3 The return loss curve and the radiation efficiency curve of Ant A in the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. The circular dotted line corresponds to the case where the antenna assembly is not provided with the wave-absorbing structure 300. Figure 2 The return loss curve and the radiation efficiency curve of Ant A in the case where the antenna assembly is not provided with the wave-absorbing structure 300, as a reference for comparison. Obviously, based on the above comparison, it can be seen that, for Ant A, whether the wave-absorbing structure 300 is provided in the antenna assembly has little effect on the return loss and the radiation efficiency of Ant A. Figure 18 and Figure 19 It can be seen that, for Ant A, whether the wave-absorbing structure 300 is provided in the antenna assembly has little effect on the return loss and the radiation efficiency of Ant A.

[0079] Figure 20 and Figure 21 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the wave-absorbing structure 300 is provided in the antenna assembly and the structure of the wave-absorbing structure 300 is different. Among them, the triangular solid line corresponds to the case where the double wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. Figure 6 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the double wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. The square dotted line corresponds to the case where the single wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. Figure 3 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the single wave-absorbing structure 300 is close to the first and second electrical connectors 210 and 220. The circular dotted line corresponds to the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. Figure 6 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. Figure 3 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the wave-absorbing structure 300 is far away from the first and second electrical connectors 210 and 220. The circular dotted line corresponds to the case where the antenna assembly is not provided with the wave-absorbing structure 300. Figure 2 The current value comparison of the first and second electrical connectors 210 and 220 when Ant A is excited in the case where the antenna assembly is not provided with the wave-absorbing structure 300, as a reference for comparison.

[0080] In combination with Figure 18 and Figure 19As a result, whether the wave-absorbing structure 300 is arranged in the antenna assembly or not has no effect on the return loss and radiation efficiency of Ant A, but in the case where the wave-absorbing structure 300 is arranged in the antenna assembly, the current coupled to the first electrical connector 210 and the second electrical connector 220 in the 1850-1990MHz emission frequency band can be greatly reduced when Ant A is excited, and the greater the area of the wave-absorbing structure 300 and the closer it is to the corresponding electrical connector 201, the greater the current reduction of the electrical connector 201. As shown in Figure 6 the double wave-absorbing structure 300, when Ant A is excited, the current values of the first electrical connector 210 and the second electrical connector 220 in the 1850MHz frequency band are already much smaller than 50mA, and the PIM and RSE risks of the antenna assembly are greatly reduced.

[0081] Figures 22 to 25 Ant B works in the 1850-1990MHz frequency band, Figure 22 and Figure 23 are the return loss curves and radiation efficiency curves of Ant B corresponding to different cases where the wave-absorbing structure 300 is arranged in the antenna assembly or not, and the structure of the wave-absorbing structure 300 arranged is different, and Figure 22 and Figure 23 The antenna assembly shown in Figure 6 The antenna assembly shown in Figure 3 The antenna assembly shown in Figure 6 The wave-absorbing structure 300 in Figure 3 The wave-absorbing structure 300 in Figure 2 The antenna assembly shown in

[0082] Based on Figure 22 and Figure 23 It can be seen from the cases shown in that for Ant B, the wave-absorbing structure 300 can effectively suppress the resonance cavity effect near 1850MHz, and can increase the radiation efficiency of the antenna assembly by 0.9dB.

[0083] In summary, compared with the above technical solution of suppressing the resonance cavity effect by the conductive structure 10, although the above-mentioned mode of adding the wave-absorbing structure 300 has a difference of only 0.3 dB in the improvement of the radiation efficiency of the antenna assembly, in the overall design, it can reduce the addition of a conductive structure 10 that needs to be plated with gold, greatly reducing the material cost, and there is no risk of EMC caused by the connection stability of the conductive structure 10.

[0084] Figure 24 And Figure 25 is whether the wave-absorbing structure 300 is provided in the antenna assembly, and the current value comparison through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited in the case of different structural forms of the wave-absorbing structure 300 provided. Among them, the triangular solid line corresponds to Figure 6 The antenna assembly shown is provided with double wave-absorbing structures 300 and is close to the first electrical connector 210 and the second electrical connector 220. The current value comparison through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited. The square dotted line corresponds to Figure 3 The antenna assembly shown is provided with a single wave-absorbing structure 300, and compared with Figure 6 The wave-absorbing structure 300 in Figure 3 The wave-absorbing structure 300 is farther away from the first electrical connector 210 and the second electrical connector 220, the current value comparison through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited. The dotted line corresponds to Figure 2 The antenna assembly shown is not provided with a wave-absorbing structure 300. The current value comparison through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited, serving as a reference for comparison.

[0085] In combination with the results of Figure 22 And Figure 23 In the case of providing a wave-absorbing structure 300 in the antenna assembly, not only can the radiation efficiency of Ant B be improved, but also the current coupled on the first electrical connector 210 and the second electrical connector 220 can be greatly reduced.

[0086] And, when the wave-absorbing structure 300 is a single-layer structure and is far away from the first electric connector 210 and the second electric connector 220, the current of the first electric connector 210 can be reduced by about 190 mA, and the current of the second electric connector 220 can be reduced by about 70 mA. When the number of the wave-absorbing structure 300 is two, and the two wave-absorbing structures 300 are close to the first electric connector 210 and the second electric connector 220 respectively, the current of the first electric connector 210 can be reduced by about 280 mA, and the current of the second electric connector 220 can be reduced by about 70 mA.

[0087] For the first electric connector 210, when the Ant B is excited, the energy is mainly coupled to the distal first electric connector 210 through the resonance cavity effect. The wave-absorbing structure 300 can effectively suppress the resonance cavity effect, so that the current of the first electric connector 210 is greatly reduced. The larger the area of the wave-absorbing structure 300 and the closer the wave-absorbing structure 300 to the first electric connector 210, the better the suppression effect on the current of the first electric connector 210. Since the original current on the first electric connector 210 is relatively large, usually close to 330 mA, a gold-plated sheet must be added. After the technical solution provided by the embodiment of the present application is adopted, that is, the wave-absorbing structure 300 is added to the antenna assembly, the current of the first electric connector 210 can be greatly reduced, so that only a conventional electric connector 201 with conductive ability is needed, and there is no need to add a gold-plated sheet or perform a gold plating operation for the first electric connector 210, thereby saving the use of a gold-plated sheet.

[0088] For the second electric connector 220, since it is close to the Ant B, when the Ant B is excited, the current coupled to the second electric connector 220 can be mainly divided into two parts. One part is that the second electric connector 220 acts as a radio frequency return point of the Ant B, and some current passes through, which conforms to the current mode characteristics of the antenna 110 body. The other part is that the second electric connector 220 acts as a part of the resonance cavity to couple the energy of the Ant B, and this part of the current can be suppressed by the wave-absorbing structure 300 to reduce the size of this part of the current. For the Ant B, the main function of the second electric connector 220 is to act as a radio frequency return point, and the current generated by the resonance cavity effect is much lower than that of the first electric connector 210, so the current suppression effect of the wave-absorbing structure 300 with different areas on the second electric connector 220 is not much different. However, for the case of exciting the Ant A, the current of the second electric connector 220 is mainly coupled by the resonance cavity effect. In this case, the closer the wave-absorbing structure 300 to the second electric connector 220, the greater the current reduction of the second electric connector 220.

[0089] Based on any of the above embodiments, the application further discloses an electronic device, which comprises a display screen 500, a frame 400, and the antenna assembly disclosed in any of the above embodiments. Of course, the electronic device can further comprise a shell, a processor, a camera module, and other devices. For the sake of brevity, the details are not described here.

[0090] In the antenna assembly, the antenna 110 is connected to the outer periphery of the frame 400, the antenna 110 is electrically connected to the conductive part of the frame 400, the electrical connector 201 in the antenna assembly is located between the frame 400 and the display screen 500, and the display screen 500 and the frame 400 are electrically connected through the electrical connector 201, so that the antenna 110 is grounded through the electrical connector 201.

[0091] More specifically, as shown in Figure 8 The display screen 500 can include a touch panel 510, a touch module 520, and a metal bracket 530. The touch module 520 can include a substrate glass, a polarizer, a control electrode, and a liquid crystal. The touch panel 510 is arranged on one side of the touch module 520, and the metal bracket 530 is arranged on the other side of the touch module 520. The metal bracket 530 can be made of copper foil or stainless steel. The metal bracket 530 can reduce the mutual interference between the entire display screen 500 and the antenna assembly, and can reduce the loss of the efficiency of the antenna assembly. During the connection of the display screen 500 and the frame 400, the electrical connector 201 is specifically connected between the frame 400 and the metal bracket 530 of the display screen 500.

[0092] More specifically, during the design of the wave-absorbing structure 300, the thickness of the wave-absorbing structure 300 can be equal to the distance between the metal bracket 530 and the frame 400. In another embodiment of the application, the wave-absorbing structure 300 can be mounted on the frame 400, and the wave-absorbing structure 300 is spaced apart from the display screen 500, that is, the thickness of the wave-absorbing structure 300 is less than the distance between the frame 400 and the metal bracket 530, so that the wave-absorbing structure 300 and the metal bracket 530 are spaced apart from each other, thereby reducing the assembly difficulty of the antenna assembly, preventing the wave-absorbing structure 300 from pressing the display screen 500 due to the tolerance or assembly error of the components, ensuring that the display effect of the display screen 500 is good, and ensuring that the service life of the display screen 500 is relatively high.

[0093] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the methods and apparatus of the present embodiments are not limited by the order of the steps or the sequence for performing the steps, as some steps can occur in different orders and / or concurrently with one another; for example, described methods can be performed in an order other than that described, and / or additional steps can be added, or steps can be omitted, or a combination thereof. Also, characteristics described in relation to certain examples can be combined in other examples.

[0094] The embodiments of the present application described above are merely exemplary and are not intended to limit the present application to the described embodiments. The described embodiments are merely illustrative and not restrictive of the present application. Many modifications and variations of the described embodiments are possible, all of which are intended to be within the scope of the present application.

Claims

1. An antenna assembly, characterized by The antenna assembly comprises an antenna, an electrical connector and a wave-absorbing structure, the antenna is configured to be fixed to the outer periphery of the frame, and the antenna is electrically connected with the conductive part of the frame, the electrical connector is arranged between the display screen of the electronic device and the frame, the conductive part of the frame and the conductive part of the display screen are configured to be electrically connected through the electrical connector, and the conductive part of the display screen, the conductive part of the frame and the electrical connector form a resonant cavity, the wave-absorbing structure is arranged in the resonant cavity, the number of the electrical connectors is plural, the spacing between at least one of the electrical connectors and the wave-absorbing structure is less than 20 mm, and the spacing between any electrical connector and the wave-absorbing structure is greater than 3 mm.

2. The antenna assembly of claim 1, wherein, The wave-absorbing structure is a single-layer structure. The modulus of the dielectric constant and / or the magnetic permeability of the wave-absorbing structure is greater than 10.

3. The antenna assembly of claim 1, wherein, The wave-absorbing structure comprises a plurality of wave-absorbing structure layers, the plurality of wave-absorbing structure layers are arranged in a stacking direction of the display screen and the frame, and the electrical parameters of each wave-absorbing structure layer are different. The modulus of the equivalent dielectric constant and / or the equivalent magnetic permeability of the wave-absorbing structure is greater than 10.

4. The antenna assembly of claim 1, wherein, The number of the wave-absorbing structures is plural, each wave-absorbing structure is arranged in the resonant cavity, each wave-absorbing structure is arranged between the electrical connectors, and the spacing between any electrical connector and at least one wave-absorbing structure is less than 20 mm.

5. The antenna assembly of claim 1, wherein, The ratio of the area of the projection of the wave-absorbing structure in the stacking direction of the frame and the display screen to the area of the projection of the resonant cavity in the stacking direction is greater than one fifth.

6. The antenna assembly of claim 1, wherein, The spacing between the wave-absorbing structure and the antenna is greater than 10 mm.

7. The antenna assembly of claim 1, wherein, The antenna comprises at least one of a GPS antenna, a WIFI antenna, a 2G antenna, a 3G antenna, a 4G antenna, a 5G antenna and a millimeter wave antenna.

8. An electronic device, comprising: The antenna assembly comprises a display screen, a frame and the antenna assembly of any one of claims 1-7.

9. The electronic device of claim 8, wherein, The wave-absorbing structure is arranged apart from the display screen.

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