CN114447568A

CN114447568A - Antenna assembly and electronic equipment

Info

Publication number: CN114447568A
Application number: CN202210181457.1A
Authority: CN
Inventors: 王君翊; 张溢强; 屈丽娟
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-05-06
Also published as: WO2023160670A1

Abstract

The application discloses antenna module and electronic equipment belongs to the communication equipment field, the antenna module includes antenna, electric connector and inhale the ripples structure, the antenna configuration is to fixing the periphery at the frame, just the antenna with the conductive part electric connection of frame, electric connector set up in electronic equipment's display screen with between the frame, the conductive part of frame with the conductive part configuration of display screen passes through electric connector electric connection, just the conductive part of display screen the conductive part of frame with electric connector forms the resonant cavity, inhale the ripples structure set up in the resonant cavity.

Description

Antenna assembly and electronic equipment

Technical Field

The application belongs to the technical field of communication equipment, and particularly relates to an antenna assembly and electronic equipment.

Background

With the continuous improvement of functions of electronic devices such as smart phones, the radio frequency signal strength of the electronic devices belongs to one of the important performances of the electronic devices. In the existing antenna, an electric connecting piece is generally used for forming a grounding point to be connected between metal structural parts such as a screen and a frame, however, if the electric connecting piece is oxidized or loosened, poor contact of the electric connecting piece can be caused, and then in the process of transmitting signals, passive intermodulation products can be generated at the connecting position of the electric connecting piece of the antenna and fall into an antenna receiving frequency band, so that serious adverse effects are generated on the receiving sensitivity of the antenna.

Disclosure of Invention

An object of the embodiments of the present application is to provide an antenna assembly and an electronic device, so as to solve the problem that the receiving and transmitting performance of an antenna is adversely affected because the radio frequency band of the antenna falls into the natural frequency of a resonant cavity at present.

In a first aspect, an embodiment of the present application discloses an antenna assembly, the antenna assembly includes an antenna, an electrical connector and a wave-absorbing structure, the antenna is configured to be fixed on an outer periphery of a frame, and the antenna is electrically connected with a conductive portion of the frame, the electrical connector is disposed between a display screen of an electronic device and the frame, the conductive portion of the frame and the conductive portion of the display screen are configured to pass through the electrical connector, the conductive portion of the display screen, the conductive portion of the frame and the electrical connector form a resonant cavity, and the wave-absorbing structure is disposed in the resonant cavity.

In a second aspect, an embodiment of the present application discloses an electronic device, which includes a display screen, a frame, and the above antenna assembly, wherein the antenna is fixed on an outer periphery of the frame, and the antenna is electrically connected to a conductive portion of the frame, the electrical connector is located between the frame and the display screen, and the conductive portion of the display screen is electrically connected to the conductive portion of the frame through the electrical connector.

The embodiment of the application discloses an antenna assembly, which can be applied to electronic equipment, wherein an antenna in the antenna assembly can be fixedly connected to the periphery of a frame of the electronic equipment, the frame can form an electric connection relationship with a display screen of the electronic equipment through an electric connecting piece in the antenna assembly, and a conductive part of the frame, a conductive part of the display screen and the electric connecting piece can form a resonant cavity. In addition, the antenna assembly in the embodiment of the application further comprises a wave-absorbing structural part, and the wave-absorbing structural part is arranged in the resonant cavity, so that the dielectric constant and/or the magnetic conductivity in the resonant cavity are changed by the wave-absorbing structural part, at least one part of clutter is absorbed by the wave-absorbing structural part, the current coupled to the electric connecting part is reduced, and the risk brought by passive intermodulation can be reduced; meanwhile, the wave-absorbing structural component can also change the natural frequency of the resonant cavity, so that the radio frequency band of the antenna is positioned outside the natural frequency of the resonant cavity, and the receiving performance of the antenna is ensured to be better.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of an electronic device including an antenna assembly with poor performance;

FIG. 2 is a schematic diagram of a solution to poor performance of an antenna assembly;

FIG. 3 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of the electronic device shown in FIG. 3 in another orientation;

FIG. 5 is a schematic cross-sectional view of an electronic device of another configuration disclosed in embodiments of the present application;

FIG. 6 is a schematic diagram of an electronic device of yet another configuration disclosed in embodiments of the present application;

FIG. 7 is a schematic cross-sectional view of the electronic device shown in FIG. 6 in another orientation;

fig. 8 is a schematic structural diagram of a display screen in an electronic device disclosed in an embodiment of the present application;

FIG. 9 is a graph comparing the return loss curve of Ant A with or without the conductive structure;

fig. 10 is a graph comparing the presence or absence of the conductive structural member with the radiation efficiency of Ant a;

FIG. 11 is a graph comparing the current value through the first electrical connection when the conductive structure is not positioned for Ant A excitation;

FIG. 12 is a graph comparing the value of current through the second electrical connection when the conductive structure is not positioned for Ant A excitation;

FIG. 13 is a comparison of return loss curves for Ant B with or without the conductive structure;

fig. 14 is a graph comparing radiation efficiency of Ant B with or without a conductive structural member;

FIG. 15 is a graph comparing the current value through the first electrical connection when the conductive structure is not positioned for Ant B excitation;

FIG. 16 is a graph comparing the value of current through the second electrical connection when the conductive structure is not positioned for Ant B excitation;

fig. 17 is a comparative plot of current when Ant a and Ant B are excited separately with the antenna assembly provided with an electrically conductive structural member;

FIG. 18 is a graph comparing return loss curves for Ant A in different cases;

fig. 19 is a graph comparing the radiation efficiency of Ant a in different cases;

FIG. 20 is a graph comparing the current values through the first electrical connection when Ant A is energized for different conditions;

FIG. 21 is a graph comparing the current values through the second electrical connection when Ant A is energized for different conditions;

FIG. 22 is a graph comparing return loss curves for Ant B in different cases;

fig. 23 is a graph comparing the radiation efficiency of Ant B in different cases;

FIG. 24 is a graph comparing the current values through the first electrical connection when Ant B is energized for different conditions;

fig. 25 is a graph comparing the current values through the second electrical connection when Ant B is excited under different conditions.

Description of reference numerals:

10-conductive structural member,

110-antenna, 120-broken seam, 130-feed point,

201-electrical connection, 210-first electrical connection, 220-second electrical connection,

300-wave-absorbing structural member, 310-wave-absorbing structural layer,

400-frame,

500-display screen, 510-touch panel, 520-touch module and 530-metal support.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The folding mechanism and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

As shown in fig. 1 to 8, an antenna assembly disclosed in the embodiments of the present application may be applied to an electronic device, where the electronic device may specifically include a frame 400 and a display screen 500, and at least a portion of the frame 400 is stacked on the display screen 500, and of course, in order to ensure that the display screen 500 and the frame 400 have the capability of being electrically connected to each other, a conductive portion having a conductive capability needs to be disposed in the display screen 500, specifically, the conductive portion may be a metal bracket 530, correspondingly, the frame 400 also includes a conductive portion having a conductive capability, specifically, a portion stacked on the display screen 500, and an outer periphery of the frame 400 may be a metal structure, or a structure formed by a non-conductive material such as plastic. In addition, the electronic device may further include devices such as a housing, a processor, and a camera module, which are not described herein one by one in view of brevity.

In an antenna assembly of an electronic device, as shown in fig. 1, the antenna assembly includes an antenna 110 and an electrical connection 201. In the process of assembling the antenna assembly, the antenna 110 may be fixedly connected to the outer periphery of the frame 400, and the antenna 110 may be electrically connected to the conductive portion of the frame 400, so that a good electrical connection relationship between the antenna 110 and the frame 400 can be formed. The specific structure and form of the antenna 110 may be determined according to practical requirements, and is not limited herein. In addition, the antenna 110 may be formed with the frame 400 in an integrated manner, and a usable antenna form may be formed by etching a groove structure at an outer peripheral edge of the frame 400, where the antenna 110 is actually a metal frame antenna, and a connecting rib of the frame 400 corresponds to a grounding portion of the antenna 110. Alternatively, the antenna 110 may be an FPC antenna, in which case, the outer periphery of the frame 400 may be a plastic structural member, and the antenna 110 may be electrically connected to the conductive portion of the frame 400 through a conductive member, so that the antenna 110 may also be grounded through the frame 400. For convenience of description, the metal frame antenna is taken as an example for illustration. In addition, as shown in fig. 1, the antenna 110 may include a plurality of antennas with different frequency bands, and the antennas 110 may be separated from each other by a gap 120, and each antenna 110 is provided with a feed point 130.

The electrical connector 201 is a device with electrical conductivity, and may be made of metal, etc., and its structural form is various, and is not limited herein. In the embodiment of the present application, the electrical connector 201 may be a screw or a spring. In another embodiment of the present application, the electrical connector 201 may be a conductive foam, so as to prevent the electrical connector 201 clamped between the frame 400 and the display screen 500 from generating a large extrusion force on the display screen 500, which causes water ripples on the display screen 500, thereby ensuring that the display screen 500 has a strong display effect and a long service life. In addition, in the working process of the antenna assembly, current is also generated at the electrical connector 201, and in order to ensure that the electrical connector 201 has strong conductive performance, the conductive capability of the electrical connector 201 can be improved by plating gold on the electrical connector 201. In addition, in the process of arranging the electrical connectors 201, the electrical connectors 201 can be arranged at a position close to the edge of the frame 400, and the electrical connectors 201 are all close to the return position of the antenna 110, more specifically, the distance between the electrical connectors 201 and the outer edge of the antenna 110 arranged at the periphery of the frame 400 can be smaller than L1, and L1 can be 20mm, so that the overall performance of the antenna 110 is further improved.

The electrical connector 201 is disposed 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 electrical connector 201, so as to use the electrical connector 201 as a ground point of the antenna 110. Meanwhile, the frame 400, the display screen 500 and the electrical connector 201 may form a resonant cavity, so that the radio frequency band of the antenna 110 may coincide with the natural frequency of the resonant cavity, thereby adversely affecting the performance of the antenna 110.

Based on this, as shown in fig. 2, the structure of the resonant cavity can be changed by additionally arranging the conductive structural member 10 in the antenna component and arranging the conductive structural member 10 in the electric field strong region in the resonant cavity, so that the resonant cavity effect is suppressed by using the conductive structural member 10, and further the natural frequency of the resonant cavity is changed, the radio frequency band of the antenna 110 is located outside the natural frequency of the resonant cavity, and the overall performance of the antenna 110 is enhanced.

However, in the above solution, the conductive structure 10 needs to be added, and the electrical connection performance of the conductive structure 10 needs to be good, which may require that the conductive performance of the conductive structure 10 is enhanced by plating gold or the like on the conductive structure 10, which may increase the cost of the electronic device, increase the assembly difficulty of the electronic device, and increase the risk of component failure in the electronic device due to the increase of the number of components connected to each other in the electronic device.

Based on this, in the embodiment of the present application, as shown in fig. 3, in addition to the antenna 110 and the electrical connector 201, the antenna assembly may further include a wave-absorbing structure 300, where the wave-absorbing structure 300 is a structure made of a wave-absorbing material and has an ability to absorb electromagnetic waves, furthermore, as shown in fig. 3, the wave-absorbing structure 300 is disposed in the resonant cavity, so that the medium in the resonant cavity changes, thereby changing the dielectric property and the magnetic field distribution in the resonant cavity, so that the natural frequency of the resonant cavity changes, specifically, the wave-absorbing structure 300 can reduce the natural frequency of the resonant cavity, so that the radio frequency band of the antenna 110 is outside the natural frequency of the resonant cavity, therefore, the conductive structural member 10 needing gold plating is not required to be additionally arranged in the strong electric field area of the resonant cavity, and the resonant cavity can not generate adverse effect on the performance of the antenna 110, so that the overall performance of the antenna 110 is better. Meanwhile, the wave-absorbing structure 300 can absorb at least a part of noise waves, so that the current coupled on the electric connector 201 is reduced, and the risk caused by passive intermodulation is reduced.

The embodiment of the application discloses an antenna assembly which can be applied to electronic equipment, wherein an antenna 110 in the antenna assembly can be fixedly connected to the periphery of a frame 400 of the electronic equipment, the frame 400 can be electrically connected with a display screen 500 of the electronic equipment through an electric connector 201 in the antenna assembly, and a resonant cavity can be formed by a conductive part of the frame 400, a conductive part of the display screen and the electric connector 201. In addition, the antenna assembly in the embodiment of the application further includes a wave-absorbing structural member 300, and the wave-absorbing structural member 300 is arranged in the resonant cavity, so that the wave-absorbing structural member 300 is used for changing the dielectric constant and/or the magnetic conductivity in the resonant cavity, at least a part of clutter is absorbed by the wave-absorbing structural member 300, the current coupled to the electric connector 201 is reduced, and further the risk caused by passive intermodulation can be reduced; meanwhile, the wave-absorbing structure 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, and the receiving performance of the antenna 110 is ensured to be good.

To further ensure that the antenna 110 has good rf return and better cavity noise rejection, the antenna assembly optionally includes a plurality of electrical connections 201. As described above, in the operation process of the antenna assembly, current may still be generated on the electrical connectors 201, which makes the electrical connectors 201 need to have stronger conductive performance, so that the electrical connectors 201 may also need to use gold plating or the like to improve their respective conductive performance. Based on this, in this embodiment, as shown in fig. 3, a distance between at least one of the plurality of electrical connectors 201 and the wave-absorbing structure 300 may be smaller than L2, and L2 may be 20 mm.

Under the condition of adopting the technical scheme, the wave-absorbing structural member 300 can be utilized to change the magnetic field around the wave-absorbing structural member, and particularly, the magnetic field around the wave-absorbing structural member 300 can be reduced, the electric field strength around the wave-absorbing structural member 300 is reduced based on the magnetic field loop integration theory, therefore, the current close to the wave-absorbing structure 300 is further reduced, and on the basis, the current on the electrical connector 201 is further reduced by using the wave-absorbing structure 300 in a manner that the distance between at least one of the electrical connectors 201 and the wave-absorbing structure 300 is relatively small, specifically, the distance between the electrical connector 201 and the wave-absorbing structure 300 is smaller than 20mm, so that the lower limit of the requirement of the electrical connector 201 on the electric conductivity is reduced, therefore, the electric connector 201 does not need to adopt a gold plating mode to improve the electric conduction capability, and the effects of reducing the cost and reducing the processing and assembling difficulty are achieved.

In addition, in consideration of the assembly process of the components, any electric connector 201 can be spaced from the wave-absorbing structure 300, that is, a gap larger than zero is formed between any electric connector 201 and the wave-absorbing structure 300, so that assembly tolerance exists between the components, and the assembly difficulty of the components is reduced. More specifically, the spacing between any of the electrical connectors 201 and the absorbent structure 300 may be greater than 3 mm.

Further, the specific shape of the wave-absorbing structure 300 may be selected according to actual requirements, and is not limited herein, for example, the wave-absorbing structure 300 may be a triangle, a circle, an ellipse, or a polygon. The wave absorbing structure 300 may be a closed ring structure, or may be an open ring structure. In a specific embodiment of the present application, the wave-absorbing structure 300 may 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, thereby expanding the application scenario thereof.

Optionally, as shown in fig. 4, the wave-absorbing structure 300 may be a single-layer structure, that is, the wave-absorbing structure 300 is an integrated structure formed by using the same material, and both the processing difficulty and the assembly difficulty of the wave-absorbing structure 300 are relatively low.

In another embodiment of the present application, as shown in fig. 5, the wave-absorbing structure 300 may include a plurality of wave-absorbing structure layers 310, where the plurality of wave-absorbing structure layers 310 are stacked along a stacking direction of the display screen 500 and the frame 400, and electrical parameters of the wave-absorbing structure layers 310 are different. Here, the stacking direction of the display screen 500 and the frame 400 may also be considered as the thickness direction of the antenna 110, i.e., the direction Y in fig. 4. In addition, in this embodiment, the electrical parameters of each wave-absorbing structure layer 310 are different, and under the condition of adopting this technical scheme, the material of each wave-absorbing structure layer 310 can be selected respectively, so as to expand the selection range of the wave-absorbing structure layer 310, and thus the dielectric constant and/or magnetic permeability of each wave-absorbing structure layer 310, the size of each wave-absorbing structure layer 310, and the like can be flexibly selected according to actual requirements, and thus the wave-absorbing structure 300 formed by a plurality of wave-absorbing structure layers 310 provides an offset effect for the frequency of the resonant cavity, and the performance of the antenna 110 is improved.

As described above, in the process of arranging the wave-absorbing structure 300, the wave-absorbing structure 300 may be a single-layer structure formed by the same material, and the dielectric constant and the magnetic permeability of the wave-absorbing structure 300 are fixed values. In this case, the mode value of the dielectric constant and/or the magnetic permeability of the wave-absorbing structure 300 may be greater than 10, so as to ensure that the wave-absorbing structure 300 changes the dielectric constant and/or the magnetic permeability in the resonant cavity more appreciably, further improve the shifting capability of the wave-absorbing structure 300 to the natural frequency of the resonant cavity, and ensure that the resonant cavity does not have adverse effect on the performance of the antenna 110.

Alternatively, the wave-absorbing structure 300 may be a multi-layer structure wave-absorbing structure 300 formed by stacking a plurality of materials, and the dielectric constant and the magnetic permeability of the wave-absorbing structure 300 may be equivalent to a certain value. Under the condition, the equivalent dielectric constant and/or equivalent permeability of the wave-absorbing structure 300 can be larger than 10, so that the wave-absorbing structure 300 can change the dielectric constant and/or permeability in the resonant cavity more remarkably, the offset capability of the wave-absorbing structure 300 on the natural frequency of the resonant cavity is further improved, and the resonant cavity can not generate adverse effect on the performance of the antenna 110.

In the above embodiment, no matter the wave-absorbing structural member 300 is a single-layer structural member or a multi-layer structural member formed by a plurality of wave-absorbing structural layers 310, the number of the wave-absorbing structural members 300 may be one, and the wave-absorbing structural members 300 are disposed in the resonant cavity to shift the frequency of the resonant cavity. Moreover, by making the wave-absorbing structure 300 close to at least one of the plurality of electrical connectors 201, the current on the electrical connector 201 with a relatively small distance from the wave-absorbing structure 300 can be relatively small.

However, when the number of the wave-absorbing structure members 300 is one, the arrangement position of the wave-absorbing structure members 300 is always limited to a certain extent, and based on this, when the number of the electrical connection members 201 is multiple, as shown in fig. 6, the number of the wave-absorbing structure members 300 may be multiple, and each wave-absorbing structure member 300 is arranged in the resonant cavity, in the process of assembling the antenna assembly, each wave-absorbing structure member 300 may be arranged among the electrical connection members 201, and the distance between any electrical connection member 201 and at least one wave-absorbing structure member 300 is smaller than 20 mm. More specifically, the spacing between a particular electrical connector 201 and a particular wave absorbing structure 300 may be L3, and L3 may be 4 mm.

That is, in this embodiment, by increasing the number of the wave-absorbing structural members 300 and arranging the wave-absorbing structural members 300 and the electrical connectors 201 in a mutually matching manner, the magnetic field strength around each wave-absorbing structural member 300 is respectively reduced by using the plurality of wave-absorbing structural members 300, so that the current on the plurality of electrical connectors 201 arranged around the plurality of wave-absorbing structural members 300 is all reduced; moreover, under the condition that the number of the wave-absorbing structural members 300 is multiple, the shape of any wave-absorbing structural member 300 can be relatively regular, so that the processing and assembling difficulty of any wave-absorbing structural member 300 is relatively low.

Of course, in another embodiment of the present application, one or more wave-absorbing structures 300 with specific shapes may also be specifically designed for specific positions of the plurality of electrical connectors 201, so that the distances between the plurality of electrical connectors 201 and the one or more wave-absorbing structures 300 are relatively smaller. By adopting the technical scheme, the currents on the plurality of electric connectors 201 can be further ensured to be relatively small, but the processing difficulty and the assembling difficulty of the wave-absorbing structural member 300 are relatively large, the application limitation of the wave-absorbing structural member 300 is relatively large, and in the implementation process of the application, a person skilled in the art can purposefully select different technical schemes according to actual requirements.

In order to further ensure that the wave-absorbing structural member 300 has a better capability of shifting the resonant cavity frequency, further, the ratio of the area of the projection of the wave-absorbing structural member 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 stacking direction may be greater than one fifth. The wave-absorbing structure 300 may be a regular columnar structure, and then the top surface or the bottom surface of the wave-absorbing structure 300, that is, the area of the surface shown by the wave-absorbing structure 300 in fig. 3 is the area of the projection of the wave-absorbing structure 300 in the stacking direction. The area of the projection of the resonant cavity in the stacking direction can also be simplified to the area of the connecting lines among the plurality of electrical connectors 201 enclosing a pattern.

It should be noted that the aforementioned definition of the area of the resonant cavity is not the area of the resonant cavity in a real sense, and is influenced by the formation condition of the resonant cavity, the calculation method of the area of the resonant cavity is complex, and there may be a certain difference between the aforementioned alternative method and the real area of the resonant cavity, but the aforementioned difference is of a relatively small order of magnitude compared to the area of the resonant cavity, and therefore, in order to express the technical solution more intuitively, the area calculated by the aforementioned calculation method is used as the theoretical area of the resonant cavity.

Furthermore, in practical application, the area of the wave-absorbing structure 300 can be further increased under the condition that conditions allow, so as to ensure that the ratio of the area of the wave-absorbing structure 300 to the real area of the resonant cavity is more than one fifth, and further ensure that the wave-absorbing structure 300 has good capability of shifting the frequency of the resonant cavity. More specifically, the ratio between the area of the wave-absorbing structure 300 and the area of the resonant cavity may be greater than one half, and in this case, the wave-absorbing structure 300 has a considerable offset effect on the resonant cavity, so that the performance of the antenna 110 can be greatly improved.

Further, a gap may be provided between the wave-absorbing structure 300 and the antenna 110, and the distance between the wave-absorbing structure 300 and the antenna 110 is greater than 10mm, in this case, the assembly difficulty of the wave-absorbing structure 300 is relatively small, and the setting range of the respective positions of the plurality of electrical connection members 201 is relatively large, so as to reduce the assembly difficulty of the whole antenna assembly.

Further, in the antenna assembly disclosed in the embodiment 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 may include any one of the above-mentioned different types of antennas 110, so as to expand the radio frequency band of the antenna 110 and improve the application range of the antenna 110.

As shown in fig. 1 to fig. 3, the antenna 110 may include Ant (antenna) a and Ant B, where Ant a and Ant B are respectively located at two opposite ends of the antenna 110, where Ant a is located at a side where a cavity bottom of the resonant cavity is located, Ant B is located at a side where a cavity opening of the resonant cavity is located, and Ant a and Ant B may both operate in a frequency band of 1850MHz to 1990 MHz. And, the plurality of electrical connections 201 in the antenna assembly may comprise a first electrical connection 210 and a second electrical connection 220, the first electrical connection 210 being located at a cavity bottom of the resonant cavity and the second electrical connection 220 being located at a cavity mouth of the resonant cavity. In addition, as described above, the conductive structural member 10 and each of the electrical connectors 201 may be a conductive foam, and further, the conductive structural member 10, the first electrical connector 210, and the second electrical connector 220 may be referred to as a foam a, a foam b, and a foam c, respectively.

Fig. 9 and 10 are a comparison of the return loss curve and the radiation efficiency curve of whether the electrically conductive structure 10 is provided in the antenna assembly versus Ant a. The solid triangular line corresponds to a return loss curve and a radiation efficiency curve of Ant a in the case where the antenna assembly shown in fig. 2 is provided with the conductive structural member 10. The dotted circle line corresponds to the return loss curve and the radiation efficiency curve of Ant a in the case where the antenna assembly of fig. 1 is not provided with the conductive structural member 10. As can be seen, whether the conductive structural member 10 is provided in the antenna assembly has little effect on the return loss and radiation efficiency of the antenna 110Ant a.

Fig. 11 and 12 show the comparison of the current values on the first electrical connection 210 and the second electrical connection 220, when the antenna assembly is provided with or without the electrically conductive structure 10 for excitation Ant a. The solid triangular line corresponds to a curve of current values on the first electrical connector 210 and the second electrical connector 220 when Ant a is excited in the case where the conductive structural member 10 is provided in the antenna assembly. The dashed circles correspond to the curves of the current values on the first 210 and second 220 electrical connections when Ant a is excited in the case of an antenna assembly without an electrically conductive structural element 10.

As a result of combining the results of fig. 9 and 10, whether the conductive structural member 10 is provided has no influence on the return loss and radiation efficiency of Ant a in the antenna assembly, but the provision of the conductive structural member 10 slightly reduces the current coupled to the first electrical connector 210 and the second electrical connector 220 in the Emission band of 1850MHz to 1990MHz when Ant a is excited, with a specific difference of about 20 to 60mA, so that, as described above, the provision of the conductive structural member 10 can effectively reduce the current on the first electrical connector 210 and the second electrical connector 220, thereby contributing to the purpose of reducing the risk of PIM (Passive Inter-modulation) and RSE (Radiated Spurious Emission).

Further, FIGS. 13-16 show the case where Ant B operates in the 1850MHz-1990MHz band. Fig. 13 and 14 are a comparison of the return loss curve and the radiation efficiency curve of whether the electrically conductive structure 10 is provided in the antenna assembly versus Ant B. Wherein the round solid lines correspond to the return loss curve and the radiation efficiency curve of Ant B in the case where the antenna assembly of fig. 2 is provided with the conductive structural member 10. The dashed diamond corresponds to the return loss curve and the radiation efficiency curve of Ant B in fig. 1, in the case where the antenna assembly is not provided with the conductive structural member 10.

As can be seen from the figure, in the case of an antenna assembly without the electrically conductive structure 10, Ant B has a resonance around 1850MHz, and in fact the natural frequency of the resonant cavity formed by the frame 400, the display screen 500 and the plurality of electrical connectors 201 falls within the emission band of 1850MHz to 1990MHz, and causes a loss of efficiency. In the case of an antenna assembly provided with an electrically conductive structural element 10, the resonance frequency of the resonant cavity is shifted out of band, substantially to a position of 2200MHz, so that the frequency of the resonant cavity is in the undesired frequency band. And, the radiation efficiency of the antenna 110 is improved by 1.2dB at the operating transmission frequency band around 1850 MHz.

Fig. 15 and 16 are graphs comparing the value of the current through the first electrical connection 210 and the second electrical connection 220 for excitation Ant B, if the electrically conductive structural element 10 is provided in the antenna assembly. The solid and round lines correspond to curves of the current values through the first electrical connection 210 and the second electrical connection 220 when Ant B is excited in the case of the antenna assembly of fig. 2 in which the conductive structure 10 is provided. The dashed diamond line corresponds to the curve of the current value through the first electrical connection 210 and the second electrical connection 220 when Ant B is energized in the case of the antenna assembly of fig. 1 without the conductive structure 10 being provided.

Combining the results of fig. 13 and 14, the Ant B radiation efficiency is improved and the currents coupled on the first electrical connector 210 and the second electrical connector 220 are greatly reduced in case the electrically conductive structural member 10 is provided in the antenna assembly. The current of the first electrical connector 210 is reduced by 220mA, and the current of the second electrical connector 220 is reduced by 110mA, so that the risk of PIM and RSE can be greatly reduced. In the case of the antenna assembly without the conductive structure 10, although the first electrical connector 210 is located at a larger distance from Ant B, the first electrical connector 210 is still coupled to a very large current due to the resonant cavity effect, and the current peak and the resonant cavity resonant frequency are substantially aligned, so that the risk of PIM and RSE of the antenna assembly is high.

In summary, in order to suppress the resonant cavity phenomenon, ensure that the efficiency of the antenna 110 is high, and reduce the work risk of EMC, a manner of increasing the conductive structural member 10 may be adopted, and since the current on the conductive structural member 10 is relatively large, as shown in fig. 17, a solid line corresponds to the case of excitation Ant a, and a dashed line corresponds to the case of excitation Ant B, it is obvious that the current of the conductive structural member 10 near 1850MHz is greater than 50Ma, so that the conductive performance of the conductive structural member 10 needs to be enhanced by plating the conductive structural member 10 with gold, and the like, thereby greatly increasing the cost of the antenna assembly, further complicating the connection relationship between components in the antenna assembly, and further increasing the failure risk of the antenna assembly.

In summary, in order to ensure the performance of the antenna 110 and ensure that the cost and the failure risk of the antenna assembly are still relatively low, the wave-absorbing structure 300 is additionally arranged in the antenna assembly, the wave-absorbing structure 300 can ensure that the performance of the antenna 110 is relatively good, and the wave-absorbing structure 300 and other structures in the antenna assembly do not have a relatively precise connection relationship such as electrical connection, so that the failure risk of the antenna assembly is relatively low, the cost of the wave-absorbing structure 300 is relatively low, and the overall cost of the antenna assembly cannot be increased too much.

Fig. 18 to 21 show the case that the antenna 110Ant a operates in the frequency band of 1850MHz-1990MHz, where fig. 18 and 19 are the comparison between the return loss curve and the radiation efficiency curve of Ant a corresponding to the case that the wave-absorbing structure 300 is disposed in the antenna assembly, and the structural form of the disposed wave-absorbing structure 300 is different, and the antenna assembly shown in fig. 18 and 19 is not disposed with the conductive structure 10. Wherein the solid triangular lines correspond to the return loss curves and radiation efficiency curves of Ant a in the case of the double wave-absorbing structure 300 of fig. 6 and close to the first electrical connector 210 and the second electrical connector 220. The dashed square line corresponds to a single wave-absorbing structure 300 in fig. 3, and compared to the wave-absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 6, the return loss curve and the radiation efficiency curve of Ant a in the case that the wave-absorbing structure 300 in fig. 3 is farther away from the first and second

electrical connectors

210 and 220 are also longer. The dotted and circular lines correspond to the return loss curve and the radiation efficiency curve of Ant a as the reference for comparison under the condition that the wave absorbing structure 300 is not arranged in the antenna assembly shown in fig. 2. Obviously, as can be seen from fig. 18 and 19, for Ant a, whether the wave-absorbing structure 300 is arranged in the antenna assembly has little influence on the return loss and radiation efficiency.

Fig. 20 and 21 show the situation that the wave-absorbing structure 300 is arranged in the antenna assembly or not, and the structural form of the wave-absorbing structure 300 is different, which corresponds to the comparison of the current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant A is excited. In the case where the solid triangular line corresponds to the double wave-absorbing structure 300 in fig. 6 and is close to the first electrical connector 210 and the second electrical connector 220, the comparison of the current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant a is excited is performed. The dashed square line corresponds to a single absorbing structure 300 in fig. 3, and compared with the absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 6, the value of the current passing through the first and second

electrical connectors

210 and 220 when Ant A is excited in the case where the absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 3 are farther apart is compared. The dotted line corresponds to a comparison of the current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant A is excited in the case that the wave-absorbing structure 300 is not disposed in the antenna assembly in FIG. 2, and the comparison is used as a reference.

As a result of combining fig. 18 and fig. 19, although the return loss and radiation efficiency of Ant a are not affected by whether the wave-absorbing structure 300 is disposed in the antenna assembly, in the case of disposing the wave-absorbing structure 300 in the antenna assembly, the current coupled to the first electrical connector 210 and the second electrical connector 220 in the emitting frequency band of 1850MHz to 1990MHz when the Ant a is excited can be greatly reduced, and the current reduction of the electrical connector 201 is larger as the area of the wave-absorbing structure 300 is larger and the closer to the electrical connector 201 is to the electrical connector. As shown in the dual wave absorbing structure 300 of fig. 6, when Ant a is excited, the current values of the first electrical connector 210 and the second electrical connector 220 are already much less than 50mA around 1850MHz, and the risk of PIM and RSE of the antenna assembly is greatly reduced.

Fig. 22 to 25 show the case that Ant B works in the frequency band of 1850MHz to 1990MHz, fig. 22 and 23 are the comparison of the return loss curve and the radiation efficiency curve of Ant B corresponding to the case that the wave-absorbing structural member 300 is arranged in the antenna assembly, and the structural form of the arranged wave-absorbing structural member 300 is different, and the antenna assembly shown in fig. 22 and 23 is not provided with the conductive structural member 10. Wherein, the solid triangular line corresponds to the return loss curve and the radiation efficiency curve of Ant B in the case that the antenna assembly shown in fig. 6 is provided with the double wave-absorbing structure 300 and is close to the first electrical connector 210 and the second electrical connector 220. The dashed square line corresponds to the antenna assembly shown in fig. 3, and compared to the wave-absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 6, the return loss curve and the radiation efficiency curve of Ant B in the case that the wave-absorbing structure 300 in fig. 3 is farther away from the first and second

electrical connectors

210 and 220 are provided. The dotted and circular lines correspond to the return loss curve and the radiation efficiency curve of Ant B as the reference for comparison under the condition that the antenna assembly shown in fig. 2 is not provided with the wave-absorbing structural member 300.

Based on the situations shown in fig. 22 and fig. 23, for Ant B, the wave-absorbing structural member 300 can effectively suppress the resonant cavity effect near 1850MHz, and can improve the radiation efficiency of the antenna assembly by 0.9 dB.

In summary, compared with the above technical scheme of using the conductive structure 10 to suppress the resonant cavity effect, although the improvement difference of the radiation efficiency of the antenna assembly by the above-mentioned manner of adding the wave-absorbing structure 300 is only 0.3dB, in terms of the overall design, the addition of the conductive structure 10 that needs to be plated with gold can be reduced, so that the material cost is greatly reduced, and the risk in the aspect of EMC caused by the connection stability of the conductive structure 10 does not exist.

Fig. 24 and 25 are graphs showing comparison of current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited, in the case that the wave-absorbing structure 300 is arranged in the antenna assembly or not, and the structural form of the arranged wave-absorbing structure 300 is different. In the case where the antenna assembly shown in fig. 6 is provided with the double wave-absorbing structure 300 and is close to the first electrical connector 210 and the second electrical connector 220, the solid triangular line corresponds to the comparison of the current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited. The dashed square line corresponds to the antenna assembly shown in fig. 3 and is provided with a monolithic wave absorbing structure 300, and compared to the wave absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 6, in the case where the wave absorbing structure 300 and the first and second

electrical connectors

210 and 220 in fig. 3 are farther apart, the value of the current passing through the first and second

electrical connectors

210 and 220 when Ant B is excited is compared. The dotted and circular lines correspond to the comparison of the current values through the first electrical connector 210 and the second electrical connector 220 when Ant B is excited in the case that the antenna assembly shown in FIG. 2 is not provided with the wave absorbing structure 300, and serve as a reference for comparison.

With the results of fig. 22 and 23, when the wave-absorbing structure 300 is disposed in the antenna assembly, not only the radiation efficiency of Ant B can be improved, but also the current coupled to the first electrical connector 210 and the second electrical connector 220 can be greatly reduced.

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

For the first electrical connector 210, energy is coupled to the first electrical connector 210 at the far end mainly through a resonant cavity effect when Ant B is excited, and the wave-absorbing structure 300 can effectively suppress the resonant cavity effect, so that the current of the first electrical connector 210 is greatly reduced, and the larger the area of the wave-absorbing structure 300 is, the closer the wave-absorbing structure is to the first electrical connector 210, the better the suppression effect on the current on the first electrical connector 210 is. Since the original current on the first electrical connector 210 is relatively large, usually about 330mA, gold plating must be added. After the technical scheme provided by the embodiment of the application is adopted, namely, after the wave-absorbing structural member 300 is additionally arranged in the antenna assembly, the current of the first electric connecting piece 210 can be greatly reduced, so that only the conventional electric connecting piece 201 with the electric conductivity is needed, and the gold-plated sheet does not need to be additionally arranged or the gold-plating operation is not needed to be carried out on the first electric connecting piece 210, so that the use of the gold-plated sheet is saved.

For the second electrical connection element 220, since it is closer to Ant B, the current coupled to the second electrical connection element 220 when Ant B is excited can be mainly split into two parts, one part is that the second electrical connection element 220 serves as a rf return point of 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 electrical connector 220 is used as a part of the resonant cavity to couple the energy of Ant B, and the current of the part can be suppressed through the wave-absorbing structure 300, so as to achieve the purpose of reducing the magnitude of the current of the part. For Ant B, the second electrical connector 220 mainly functions as a radio frequency reflux point, and the current generated by the resonant cavity effect is much lower than that of the first electrical connector 210, so that the current suppression effects of the wave-absorbing structural members 300 with different areas on the second electrical connector 220 are not different. However, for the case of Ant A excitation, the current in the second electrical connection 220 is primarily due to resonant cavity effect coupling, in which case the current drop in the second electrical connection 220 is greater the closer the absorbing structure 300 is to the second electrical connection 220.

Based on any of the above embodiments, the present application further discloses an electronic device, where the electronic device includes the display screen 500, the frame 400, and the antenna assembly disclosed in any of the above embodiments, and of course, the electronic device may further include other devices such as a housing, a processor, and a camera module, and the details are not described here in consideration of brevity of text.

The antenna 110 in the antenna assembly 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 is electrically connected to the frame 400 through the electrical connector 201, so that the antenna 110 is grounded through the electrical connector 201.

More specifically, as shown in fig. 8, the display screen 500 may include a touch panel 510, a touch module 520, and a metal frame 530, wherein the touch module 520 may include a substrate glass, a polarizer, a control electrode, and a liquid crystal. The touch panel 510 is disposed on one side of the touch module 520, the metal bracket 530 is disposed on the other side of the touch module 520, the metal bracket 530 may be made of copper foil or stainless steel, and the metal bracket 530 may reduce the mutual interference between the entire display screen 500 and the antenna assembly, and may reduce the loss of the efficiency of the antenna assembly. In the process of connecting the display screen 500 and the frame 400, the electrical connector 201 is particularly connected between the frame 400 and the metal bracket 530 of the display screen 500.

More specifically, in the process of designing the wave-absorbing structure 300, the thickness of the wave-absorbing structure 300 can be made equal to the distance between the metal support 530 and the frame 400. In another embodiment of the present application, the wave-absorbing structure 300 may be installed on the frame 400, and the wave-absorbing structure 300 and the display screen 500 are disposed at an interval, that is, the thickness of the wave-absorbing structure 300 is smaller than the interval between the frame 400 and the metal bracket 530, so that the wave-absorbing structure 300 and the metal bracket 530 are spaced from each other, and further the assembly difficulty of the antenna assembly is reduced, preventing the wave-absorbing structure 300 from extruding the display screen 500 due to factors such as tolerance or assembly error of components, and ensuring that the display effect of the display screen 500 is better, and ensuring that the service life of the display screen 500 is relatively longer.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An antenna assembly, characterized in that, the antenna assembly includes an antenna, an electric connector and a wave-absorbing structure, the antenna is configured to be fixed on the periphery of a frame, and the antenna is electrically connected with a conductive part of the frame, the electric connector is arranged between a display screen of an 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 connector, and the conductive part of the display screen, the conductive part of the frame and the electric connector form a resonant cavity, and the wave-absorbing structure is arranged in the resonant cavity.

2. The antenna assembly of claim 1, wherein the number of electrical connections is plural, and wherein a spacing between at least one of the plural electrical connections and the wave-absorbing structure is less than 20 mm.

3. The antenna assembly of claim 1, wherein the wave absorbing structure is a single layer structure;

and the mode value of the dielectric constant and/or the magnetic conductivity of the wave-absorbing structural member is larger than 10.

4. The antenna assembly of claim 1, wherein the wave-absorbing structure comprises a plurality of wave-absorbing structure layers, the wave-absorbing structure layers are stacked along a stacking direction of the display screen and the frame, and electrical parameters of the wave-absorbing structure layers are different;

and the equivalent dielectric constant and/or equivalent magnetic permeability of the wave-absorbing structural member have a modulus value larger than 10.

5. The antenna assembly of claim 1, wherein the number of the wave-absorbing structural members and the number of the electrical connectors are multiple, each wave-absorbing structural member is disposed in the resonant cavity, each wave-absorbing structural member is disposed between a plurality of the electrical connectors, and a distance between any one of the electrical connectors and at least one of the wave-absorbing structural members is less than 20 mm.

6. 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.

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

8. 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.

9. An electronic device comprising a display, a frame, and the antenna assembly of any one of claims 1-8, wherein the antenna is affixed to an outer perimeter of the frame and is electrically connected to a conductive portion of the frame, wherein the electrical connector is located between the frame and the display, and wherein the conductive portion of the display is electrically connected to the conductive portion of the frame via the electrical connector.

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