CN114447568A - Antenna Components and Electronics - Google Patents

Abstract

The present application discloses an antenna assembly and electronic equipment, belonging to the field of communication equipment. The antenna assembly includes an antenna, an electrical connector and a wave absorbing structure. The antenna is configured to be fixed on the outer periphery of a frame, and the antenna is connected to the The conductive part of the frame is electrically connected, 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, and the wave absorbing structural part is arranged in the resonant cavity.

Description

Antenna Components and Electronics

technical field

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

Background technique

With the continuous improvement of the functions of electronic devices such as smartphones, the RF signal strength of electronic devices is one of the important properties of electronic devices. In current antennas, electrical connectors are usually used to form ground points between metal structural components such as screens and frames. However, if the electrical connectors are oxidized or loosened, the electrical connectors will have poor contact. Therefore, in the process of transmitting signals from the antenna, passive intermodulation products will be generated at the connection positions of the electrical connectors, which fall into the receiving frequency band of the antenna, and have a serious adverse effect on the receiving sensitivity of the antenna.

SUMMARY OF THE INVENTION

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

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 structural member, the antenna is configured to be fixed on the outer periphery of a frame, and the antenna is connected to the frame. The conductive part is electrically connected, the electrical connector is arranged between the display screen of the electronic device and the frame, and 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 connection piece form a resonant cavity, and the wave absorbing structural part is arranged 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-mentioned antenna assembly, the antenna is fixed on the outer periphery of the frame, and the antenna is electrically connected to a conductive part of the frame , the electrical connector is located 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.

An 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 a frame of the electronic device, and the frame can be connected to the electronic device through electrical connectors in the antenna assembly. The display screen is in an electrical connection relationship, and the conductive part of the frame, the conductive part of the display screen and the electrical connector can form a resonant cavity. In addition, the antenna assembly in the embodiment of the present application further includes a wave absorbing structural member, and the wave absorbing structural member is arranged in the resonant cavity, so that the dielectric constant and/or the magnetic permeability in the resonating cavity can be changed by using the wave absorbing structural member, In addition, the absorbing structure is used to absorb at least a part of the clutter to reduce the current coupled to the electrical connection, thereby reducing the risk of passive intermodulation; The radio frequency band of the antenna is located outside the natural frequency of the resonant cavity, which ensures better reception performance of the antenna.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

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

FIG. 2 is a schematic structural diagram of a technical solution for solving the poor performance of an antenna assembly;

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

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

5 is a schematic cross-sectional view of an electronic device with another structure disclosed in an embodiment of the present application;

6 is a schematic diagram of an electronic device with another structure disclosed in an embodiment of the present application;

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

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 comparison diagram of the return loss curve of Ant A with or without conductive structural components;

FIG. 10 is a comparison diagram of the radiation efficiency of Ant A with or without conductive structures;

11 is a comparison diagram of the current value passing through the first electrical connector when the conductive structure is set or not when the Ant A is excited;

12 is a comparison diagram of the current value passing through the second electrical connection member when the conductive structure is set or not when the Ant A is excited;

FIG. 13 is a comparison diagram of the return loss curve of Ant B with or without conductive structural components;

FIG. 14 is a comparison diagram of the radiation efficiency of Ant B with or without conductive structures;

15 is a comparison diagram of the current value passing through the first electrical connection member when the conductive structural member is set or not when the Ant B is excited;

16 is a comparison diagram of the current value passing through the second electrical connection member when the conductive structure is set or not when the Ant B is excited;

Figure 17 is a current comparison diagram when Ant A and Ant B are excited respectively when the antenna assembly is provided with a conductive structural member;

Figure 18 is a comparison diagram of the return loss curves of Ant A under different conditions;

Figure 19 is a comparison diagram of the radiation efficiency of Ant A under different conditions;

Figure 20 is a comparison diagram of the current value passing through the first electrical connector when Ant A is excited under different conditions;

Figure 21 is a comparison diagram of the current value passing through the second electrical connector when Ant A is excited under different conditions;

Figure 22 is a comparison diagram of the return loss curves of Ant B under different conditions;

Figure 23 is a comparison diagram of the radiation efficiency of Ant B under different conditions;

FIG. 24 is a comparison diagram of the current value passing through the first electrical connector when Ant B is excited under different conditions;

FIG. 25 is a comparison diagram of the current value through the second electrical connection when Ant B is excited under different conditions.

Description of reference numbers:

10- Conductive structural parts,

110-Antenna, 120-Slit, 130-Feed point,

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

300-wave absorbing structure, 310-wave absorbing structure layer,

400-frame,

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

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. 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 protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

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

As shown in FIG. 1 to FIG. 8 , an embodiment of the present application discloses an antenna assembly, which can be applied to an electronic device. The electronic device may specifically include a frame 400 and a display screen 500 , and at least a part of the frame 400 is connected to the display screen 500 . Laminated arrangement, of course, in order to ensure that the display screen 500 and the frame 400 have the ability to be electrically connected to each other, the display screen 500 needs to be provided with a conductive part with electrical conductivity, which can be a metal bracket 530. Correspondingly, the frame 400 also includes The conductive portion with electrical conductivity may be a portion stacked with the display screen 500 , and the outer periphery of the frame 400 may be a metal structure or a structure formed of non-conductive materials such as plastic. In addition, the electronic device may also include components such as a casing, a processor, and a camera module, which are not described here for brevity.

In an antenna assembly of an electronic device, as shown in FIG. 1 , the antenna assembly includes an antenna 110 and an electrical connector 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 by electrically connecting the antenna 110 and the conductive part of the frame 400, a good electrical connection can be formed between the antenna 110 and the frame 400 relation. The specific structure and form of the antenna 110 can be determined according to actual requirements, which are not limited here. In addition, the antenna 110 can be integrally formed with the frame 400, and a usable antenna form is formed by etching a groove structure at the outer peripheral edge of the frame 400. This antenna 110 is actually a metal frame antenna, and the frame 400 The connecting rib is equivalent to the grounding 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 structural member, and the antenna 110 can be electrically connected to the conductive part of the frame 400 through a conductive member, so that the antenna 110 can also be The purpose of grounding can be achieved by the frame 400 . For ease of description, a metal frame antenna is used as an example for description below. In addition, as shown in FIG. 1 , the antennas 110 may include multiple antennas of different frequency bands, and the antennas 110 may be separated from each other by slits 120 , and each antenna 110 is provided with a feed point 130 .

The electrical connector 201 is a device with electrical conductivity, which can be specifically made of materials such as metal, and has various structural forms, which are not limited here. In the specific embodiment of the present application, the electrical connector 201 may be a structure such as a screw or an elastic sheet. In another embodiment of the present application, the electrical connector 201 may be a conductive foam, so as to prevent the electrical connector 201 sandwiched between the frame 400 and the display screen 500 from producing a large pressing force on the display screen 500 , causing water ripples to appear on the display screen 500 , thereby 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, current will also be generated at the electrical connector 201. In order to ensure that the electrical connector 201 has strong electrical conductivity, the electrical connector 201 can be raised by plating gold on the electrical connector 201. conductivity. In addition, in the process of arranging the electrical connectors 201 , the electrical connectors 201 can be arranged near the edge of the frame 400 , and the electrical connectors 201 are all close to the grounding position of the antenna 110 . The distance between the component 201 and the outer edge of the antenna 110 disposed on the outer periphery of the frame 400 is less than L1 , and L1 may be 20 mm, which further improves the overall performance of the antenna 110 .

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 that the electrical connector 201 is used as the grounding point of the antenna 110 . At the same time, the frame 400 , the display screen 500 and the electrical connector 201 will 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 adding a conductive structural member 10 in the antenna assembly and setting the conductive structural member 10 in the electric field strong region in the resonant cavity, so as to utilize the conductive structure. The component 10 is used to suppress the effect of the resonant cavity, and then the natural frequency of the resonant cavity is changed, so that 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 structural member 10 needs to be added first, and the electrical connection performance of the conductive structural member 10 needs to be good, which may require the conductive structural member 10 to be plated with gold to enhance the conductive performance. On the one hand, the cost of the electronic device will increase, and on the other hand, the assembly difficulty of the electronic device will be increased, and since the number of interconnected components in the electronic device increases, the risk of failure of the components in the electronic device increases.

Based on this, in the embodiment of the present application, as shown in FIG. 3 , in addition to the above-mentioned antenna 110 and the electrical connector 201 , the antenna assembly may further include a wave absorbing structural member 300 , and the wave absorbing structural member 300 is made of a wave absorbing material. and has the ability to absorb electromagnetic waves, and, as shown in FIG. 3 , the wave absorbing structural member 300 is arranged in the resonant cavity, so that the medium in the resonant cavity changes, thereby changing the dielectric properties and properties of the resonant cavity. The distribution of the magnetic field causes the natural frequency of the resonant cavity to change. 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 located outside the natural frequency of the resonant cavity, so that there is no need to resonate The additional conductive structure 10 that needs to be plated with gold is provided in the strong electric field region in the cavity, which can also ensure that the resonant cavity will 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 a part of the clutter, thereby reducing the current coupled to the electrical connecting member 201, thereby reducing the risk of passive intermodulation.

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 a frame 400 of the electronic device, and the frame 400 can pass through the electrical connector in the antenna assembly. 201 forms an electrical connection relationship with the display screen 500 of the electronic device, and the conductive portion of the frame 400, the conductive portion of the display screen and the electrical connection member 201 can form a resonant cavity. In addition, 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 that the dielectric constant and/or magnetic field in the resonant cavity can be changed by using the wave absorbing structural member 300 and absorb at least a part of the clutter by using the absorbing structure 300 to reduce the current coupled to the electrical connector 201, thereby reducing the risk of passive intermodulation; at the same time, the absorbing structure 300 can also change the resonance The natural frequency of the cavity is such that the radio frequency band of the antenna 110 is located outside the natural frequency of the resonant cavity, so as to ensure better reception performance of the antenna 110 .

In order to further ensure that the antenna 110 has a better effect of RF backflow and better suppress the clutter of the resonant cavity, optionally, the antenna assembly includes a plurality of electrical connectors 201 . As mentioned above, during the working process of the above-mentioned antenna assembly, current may still be generated on the electrical connectors 201 , which makes the plurality of electrical connectors 201 also need to have strong electrical conductivity, so that the plurality of electrical connectors 201 also have strong electrical conductivity. It may be necessary to improve the respective conductivity by means of gold plating, etc. Based on this, in this embodiment, as shown in FIG. 3 , the distance between at least one of the plurality of electrical connectors 201 and the wave absorbing structure 300 may be smaller than L2 , which may specifically be 20 mm.

In the case of adopting the above technical solution, the wave absorbing structure 300 can be used to change the magnetic field around itself, specifically, the magnetic field around the wave absorbing structure 300 can be reduced. Based on the magnetic field loop integral theory, the wave absorbing structure can be The electric field strength around the component 300 is reduced, so that the current adjacent to the wave absorbing structure 300 is further reduced. Based on this, the distance between at least one of the plurality of electrical connecting components 201 and the wave absorbing structure 300 is opposite. Specifically, the distance between the electrical connector 201 and the wave absorbing structural member 300 can be made smaller than 20 mm, and the wave absorbing structural member 300 can be used to further reduce the current on the electrical connecting member 201, so that the electrical connecting member The lower limit of the requirement for the electrical conductivity of the electrical connector 201 is reduced, so that the electrical connector 201 does not need to be gold-plated to improve its electrical conductivity, thereby reducing the cost and the difficulty of processing and assembling.

In addition, considering the assembly process of the components, any electrical connector 201 can be spaced from the wave absorbing structural member 300, that is, any electrical connecting member 201 and the wave absorbing structural member 300 have a distance greater than zero between them. There is a gap between the components, so there is an assembly tolerance between the components, which reduces the assembly difficulty of the components. More specifically, the distance between any electrical connection member 201 and the wave absorbing structural member 300 may be greater than 3 mm.

Further, the specific shape of the wave absorbing structural member 300 can be selected according to actual requirements, which is not limited here. For example, the wave absorbing structural member 300 can be a triangle, a circle, an ellipse, or a polygon. Moreover, the wave absorbing structural member 300 may be a closed annular structural member, and may also be an annular structural member having an opening. In a specific embodiment of the present application, the wave absorbing structural member 300 can be a rectangular structural member, which can reduce the processing difficulty of the wave absorbing structural member 300, and can improve the adaptability of the wave absorbing structural member 300 and expand its application scenarios.

Optionally, as shown in FIG. 4 , the wave absorbing structural member 300 may be a single-layer structural member, that is, the wave absorbing structural member 300 is an integrated structural member formed of the same material. The processing difficulty and assembly difficulty are relatively low.

In another embodiment of the present application, as shown in FIG. 5 , the wave absorbing structure member 300 may include a plurality of wave absorbing structure layers 310 , and 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. The stacking direction of the display screen 500 and the frame 400 may also be regarded as the thickness direction of the antenna 110 , that is, the direction Y in FIG. 4 . In addition, in this embodiment, the electrical parameters of each wave absorbing structure layer 310 are different. In the case of adopting this technical solution, the material of each wave absorbing structure layer 310 can be selected separately, which enlarges the wave absorbing structure layer 310 Therefore, the dielectric constant and/or magnetic permeability of each wave-absorbing structure layer 310 and the size of each wave-absorbing structure layer 310 can be flexibly selected according to actual needs, so as to utilize multiple wave-absorbing structures The overall structure of the wave absorbing structure 300 formed by the layer 310 provides a shift effect for the frequency of the resonant cavity, thereby improving the performance of the antenna 110 .

As described above, in the process of arranging the wave absorbing structural member 300, the wave absorbing structural member 300 may be a single-layer structural member formed of the same material, and the dielectric constant and magnetic permeability of the wave absorbing structural member 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 can be set to be greater than 10, so as to ensure the dielectric constant and/or the magnetic permeability of the wave absorbing structure 300 in the resonant cavity. The change is more considerable, further improving the ability of the wave absorbing structure 300 to shift the natural frequency of the resonant cavity, and ensuring that the resonant cavity will not adversely affect the performance of the antenna 110 .

Alternatively, the wave absorbing structural member 300 may be a multi-layered structural wave absorbing structural member 300 formed by stacking multiple materials, and the dielectric constant and magnetic permeability of the wave absorbing structural member 300 may be equivalent to a certain value. In this case, the mode value of the equivalent permittivity and/or the equivalent permeability of the wave absorbing structure 300 can be set to be greater than 10, so as to ensure that the wave absorbing structure 300 has no effect on the permittivity and/or the equivalent magnetic permeability in the resonant cavity. Or the change of the magnetic permeability is more considerable, which further improves the ability of the wave absorbing structure 300 to shift the natural frequency of the resonant cavity, and ensures that the resonant cavity does not adversely affect the performance of the antenna 110 .

In the above embodiment, no matter whether 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 member 300 can be one. 300 is arranged in the resonant cavity to shift the frequency of the resonant cavity. In addition, by placing the wave absorbing structural member 300 close to at least one of the plurality of electrical connecting members 201 , the current on the electrical connecting member 201 with a relatively small distance from the wave absorbing structural member 300 can be made relatively small.

However, in the case where the number of the wave absorbing structural member 300 is one, the installation position of the wave absorbing structural member 300 will always be limited to a certain extent. Based on this, in the case where the number of the electrical connecting members 201 is multiple, as shown in FIG. As shown in Fig. 6, the number of the wave absorbing structural members 300 can be multiple, and each wave absorbing structural member 300 is arranged in the resonant cavity. In the process of assembling the antenna assembly, each wave absorbing structural member 300 can be arranged in multiple Between each of the electrical connectors 201, and the distance between any electrical connector 201 and the at least one wave absorbing structure 300 is less than 20 mm. More specifically, the distance between a certain electrical connection member 201 and a certain wave absorbing structural member 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 connecting member 201 to cooperate with each other, the plurality of wave absorbing structural members 300 can be used to reduce the surrounding area respectively Therefore, the currents on the plurality of electrical connectors 201 arranged around the plurality of wave absorbing structural members 300 are reduced; and, in the case that the number of the wave absorbing structural members 300 is multiple, any The shape of a wave absorbing structure 300 is relatively regular, so as to ensure that the processing and assembly difficulty of any wave absorbing structure 300 is relatively small.

Of course, in another embodiment of the present application, one or more wave-absorbing structural members 300 with a specific shape can also be specifically designed for the specific positions of the plurality of electrical connectors 201 , so that the plurality of electrical connectors 201 The distance from the one or more wave absorbing structural members 300 is relatively smaller. With this technical solution, the currents on the plurality of electrical connectors 201 can be further guaranteed to be relatively small. However, relatively speaking, the processing difficulty and assembly difficulty of this type of wave absorbing structure 300 are relatively high, and this kind of wave absorbing structure is relatively difficult to assemble. The applicable limitations of the wave absorbing structural member 300 are relatively large. During the implementation of the present application, those skilled in the art can select different technical solutions in a targeted manner according to actual needs.

In order to further ensure that the wave absorbing structural member 300 has a better ability to shift the frequency of the resonant cavity, further, the projected area of the wave absorbing structural member 300 in the stacking direction of the frame 400 and the display screen 500 can be the same as the resonant cavity in the aforementioned The ratio of the projected areas in the stacking direction is greater than one fifth. Wherein, the wave absorbing structural member 300 can generally be a regular columnar structural member, and then the top surface or the bottom surface of the wave absorbing structural member 300, that is, the area of the surface shown by the wave absorbing structural member 300 in FIG. 3 is the wave absorbing structural member 300 The projected area in the stacking direction. The projected area of the resonant cavity in the aforementioned stacking direction can also be simplified as the area of the pattern formed by the connecting lines between the plurality of electrical connectors 201 .

It should be noted that the above-mentioned definition of the area of the resonant cavity is not the area of the resonant cavity in the true sense. Affected by the formation conditions of the resonant cavity, the calculation method of the area of the resonant cavity is more complicated. There may be a certain difference between the areas, but the aforementioned difference is relatively small in magnitude compared to the area of the resonant cavity. Therefore, in order to express the technical solution more intuitively, the area calculated by the above calculation method is used as the resonance cavity. The theoretical area of the cavity.

Furthermore, in practical applications, the area of the wave absorbing structural member 300 can be further increased if conditions permit, to ensure that the ratio of the area of the wave absorbing structural member 300 to the real area of the resonant cavity is greater than one-fifth, thereby ensuring that The wave absorbing structure 300 has a good ability to shift the frequency of the resonant cavity. More specifically, the ratio between the area of the wave absorbing structural member 300 and the area of the resonant cavity can be made greater than one-half. The performance of the antenna 110 can be greatly improved.

Further, there can be a space between the wave absorbing structure 300 and the antenna 110 , and the distance between the wave absorbing structure 300 and the antenna 110 can be set to be greater than 10 mm. In this case, it is difficult to assemble the wave absorbing structure 300 It is relatively small, and the setting range of the respective positions of the plurality of electrical connectors 201 is relatively large, so as to reduce the assembly difficulty of the entire antenna assembly.

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 may include any one of the above-mentioned different types of antennas 110 , thereby expanding the radio frequency band of the antenna 110 and increasing the applicable range of the antenna 110 .

As shown in FIG. 1 to FIG. 3 , the antenna 110 may include Ant (antenna) A and Ant B. Ant A and Ant B are respectively located at opposite ends of the antenna 110 , wherein Ant A is located in the cavity of the resonant cavity. On the side where the bottom is located, Ant B is located on the side where the cavity mouth of the resonator is located, and both Ant A and Ant B can work in the frequency band of 1850MHz to 1990MHz. In addition, the plurality of electrical connectors 201 in the antenna assembly may include a first electrical connector 210 and a second electrical connector 220, the first electrical connector 210 is located at the bottom of the resonant cavity, and the second electrical connector 220 is provided at the mouth of the resonant cavity. In addition, as described above, the conductive structural member 10 and each electrical connection member 201 may be conductive foam, and further, the conductive structural member 10, the first electrical connection member 210 and the second electrical connection member 220 may be referred to as foam, respectively a, foam b and foam c.

FIG. 9 and FIG. 10 are the comparison between the return loss curve and the radiation efficiency curve of Ant A with or without the conductive structural member 10 in the antenna assembly. The solid triangle line corresponds to the return loss curve and radiation efficiency curve of Ant A when 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 radiation efficiency curve of Ant A when the antenna assembly in FIG. 1 is not provided with the conductive structural member 10 . As can be seen from the figure, whether or not 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.

11 and 12 are comparisons of current values on the first electrical connector 210 and the second electrical connector 220 when the antenna assembly is provided with the conductive structure 10 to excite Ant A. The solid triangle line corresponds to the current value curve on the first electrical connector 210 and the second electrical connector 220 when the antenna assembly is provided with the conductive structure 10 when Ant A is excited. The dotted circle line corresponds to the current value curve on the first electrical connector 210 and the second electrical connector 220 when the antenna assembly is not provided with the conductive structure 10 when Ant A is excited.

Combining the results of FIG. 9 and FIG. 10 , whether or not the conductive structural member 10 is provided has no effect on the return loss and radiation efficiency of Ant A in the antenna assembly, but the provision of the conductive structural member 10 will slightly reduce the coupling to the first electric current when Ant A is excited. The current of the connecting member 210 and the second electrical connecting member 220 in the emission frequency band of 1850MHz to 1990MHz, the specific difference of the current is about 20-60mA. Therefore, as described above, the conductive structural member 10 can be provided to effectively reduce the first electrical current. The currents on the connection member 210 and the second electrical connection member 220 further help to achieve the purpose of reducing the risk of PIM (Passive Inter-Modulatio, passive intermodulation) and RSE (Radiated Spurious Emission, radiation spurious).

Further, FIG. 13 to FIG. 16 show the case where Ant B works in the frequency band of 1850MHz-1990MHz. FIG. 13 and FIG. 14 are the comparison between the return loss curve and the radiation efficiency curve of Ant B with or without the conductive structure 10 in the antenna assembly. Wherein, the solid circle line corresponds to the return loss curve and radiation efficiency curve of Ant B when the antenna assembly is provided with the conductive structural member 10 in FIG. 2 . The dashed diamond line corresponds to the return loss curve and radiation efficiency curve of Ant B when the antenna assembly in FIG. 1 is not provided with the conductive structural member 10 .

Based on the figure, it can be seen that in the case where the conductive structure 10 is not provided in the antenna assembly, Ant B has a resonance near 1850 MHz, which is actually the natural frequency of the resonant cavity formed by the frame 400 , the display screen 500 and the plurality of electrical connectors 201 . , falls in the transmission frequency band of 1850MHz-1990MHz, and causes efficiency loss. In the case where the antenna assembly is provided with the conductive structural member 10, the resonant frequency of the resonant cavity is moved out of band, generally to a position of 2200 MHz, so that the frequency of the resonant cavity is located in an undesired frequency band. Moreover, in the working emission frequency band around 1850MHz, the radiation efficiency of the antenna 110 is improved by 1.2dB.

FIGS. 15 and 16 are comparisons of current values passing through the first electrical connector 210 and the second electrical connector 220 when the antenna assembly is provided with or without the conductive structure 10 to excite Ant B. The solid circle line corresponds to the curve of the current value passing through the first electrical connector 210 and the second electrical connector 220 when the antenna assembly 10 is provided in FIG. 2 when the Ant B is excited. The dashed diamond line corresponds to the curve of the current value passing through the first electrical connector 210 and the second electrical connector 220 when the Ant B is excited when the conductive structure 10 is not provided in the antenna assembly in FIG. 1 .

13 and 14 , in the case where the conductive structural member 10 is provided in the antenna assembly, the Ant B radiation efficiency is improved, and the current coupled to the first electrical connection member 210 and the second electrical connection member 220 is greatly increased. decline. The current of the first electrical connector 210 is reduced by 220 mA, and the current of the second electrical connector 220 is decreased by 110 mA, thereby greatly reducing the risk of PIM and RSE. In the case where the conductive structural member 10 is not provided in the antenna assembly, although the distance between the first electrical connection member 210 and Ant B is relatively large, due to the effect of the resonant cavity, the first electrical connection member 210 is still coupled to a great current , the current peak and the cavity resonant frequency are substantially aligned, resulting in a high risk of PIM and RSE for the antenna assembly.

To sum up, in order to suppress the resonance cavity phenomenon, ensure high efficiency of the antenna 110, and reduce the working risk of EMC, the method of increasing the conductive structure 10 can be adopted, and since the current on the conductive structure 10 is relatively large, as shown in FIG. 17 , the solid line corresponds to the excitation of Ant A, and the dashed line corresponds to the excitation of Ant B. Obviously, the current of the conductive structure 10 is greater than 50Ma near 1850MHz, so it is necessary to enhance the conduction of the conductive structure 10 by plating the conductive structure 10 with gold or other means. Therefore, the cost of the antenna assembly is greatly increased, the connection relationship between the components in the antenna assembly is more complicated, and the failure risk of the antenna assembly is higher.

To sum up, in order to ensure the performance of the antenna 110, and to ensure that the cost and failure risk of the antenna assembly are still relatively low, the present application adds a wave absorbing structural member 300 to the antenna assembly, and the wave absorbing structural member 300 can make the performance of the antenna 110 relatively low. It is better, and because the wave absorbing structural member 300 does not have a relatively precise connection relationship such as electrical connection with other structural members in the antenna assembly, the failure risk of the antenna assembly is relatively low, and the cost of the wave absorbing structural member 300 itself is also low. Relatively low, so that the overall cost of the antenna assembly does not rise too much.

FIGS. 18 to 21 show the situation that the antenna 110Ant A operates in the frequency band of 1850MHz-1990MHz, wherein FIGS. 18 and 19 are whether the wave absorbing structural member 300 is provided in the antenna assembly, and whether the wave absorbing structural member 300 is provided. The return loss curve and radiation efficiency curve of Ant A corresponding to different structural forms are compared, and the conductive structural member 10 is not provided in the antenna assemblies shown in FIG. 18 and FIG. 19 . The solid triangle line corresponds to the return loss curve and radiation efficiency curve of Ant A when the double wave absorbing structure 300 in FIG. 6 is close to the first electrical connector 210 and the second electrical connector 220 . The dashed square line corresponds to the single wave absorbing structure 300 in FIG. 3 , and compared with the wave absorbing structure 300 and the first electrical connecting member 210 and the second electrical connecting member 220 in FIG. 6 , the wave absorbing structural member 300 in FIG. 3 Return loss curve and radiation efficiency curve of Ant A at a farther distance from the first electrical connector 210 and the second electrical connector 220 . The dotted line corresponds to the return loss curve and the radiation efficiency curve of Ant A in the case where the wave absorbing structural member 300 is not provided in the antenna assembly shown in FIG. 2 , as a reference for comparison. Obviously, based on FIG. 18 and FIG. 19 , for Ant A, whether or not the wave absorbing structure 300 is provided in the antenna assembly has little effect on its return loss and radiation efficiency.

FIG. 20 and FIG. 21 show whether the wave absorbing structural member 300 is provided in the antenna assembly, and the structure of the set wave absorbing structural member 300 is different, which corresponds to the first electrical connecting member 210 and the second electrical connecting member 210 when the Ant A is excited. The current value of the electrical connector 220 is compared. Wherein, the solid triangle line corresponds to the case where the double wave absorbing structure 300 in FIG. 6 is close to the first electrical connector 210 and the second electrical connector 220 , Ant A passes through the first electrical connector 210 and the second electrical connection when excited. The current value of the device 220 is compared. The dashed square line corresponds to the single wave absorbing structure 300 in FIG. 3 , and compared with the wave absorbing structure 300 and the first electrical connecting member 210 and the second electrical connecting member 220 in FIG. 6 , the wave absorbing structural member 300 in FIG. 3 Compared with the case where the first electrical connector 210 and the second electrical connector 220 are farther away, the current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant A is excited are compared. The dotted line corresponds to the comparison of current values passing through the first electrical connector 210 and the second electrical connector 220 when Ant A is excited when the antenna assembly in FIG.

18 and FIG. 19 , it can be seen that whether or not the absorbing structure 300 is provided in the antenna assembly has no effect on the return loss and radiation efficiency of Ant A, but in the case where the absorbing structure 300 is provided in the antenna assembly, it can be The current coupled to the first electrical connector 210 and the second electrical connector 220 in the emission frequency band of 1850MHz-1990MHz is greatly reduced when Ant A is excited, and the larger the area of the wave absorbing structure 300, the closer to the corresponding For the electrical connector 201, the greater the current drop of the electrical connector 201 is. As shown in FIG. 6 , when Ant A is excited, the current value of the first electrical connector 210 and the second electrical connector 220 is much less than 50 mA near 1850 MHz, and the PIM and RSE risks of the antenna assembly are great. reduce.

Fig. 22 to Fig. 25 show the situation of Ant B working in the frequency band of 1850MHz-1990MHz, Fig. 22 and Fig. 23 are whether the absorbing structure 300 is provided in the antenna assembly, and the structure of the absorbing structure 300 is different The return loss curve and radiation efficiency curve of Ant B corresponding to the case of , are compared, and the conductive structural member 10 is not provided in the antenna assembly shown in FIG. 22 and FIG. 23 . The solid triangle line corresponds to the return loss curve and radiation efficiency of Ant B when the antenna assembly shown in FIG. curve. The square dotted line corresponds to the antenna assembly shown in FIG. 3 is provided with a single-piece wave absorbing structure 300 , and compared with the wave absorbing structure 300 and the first electrical connector 210 and the second electrical connector 220 in FIG. 6 , FIG. 3 The return loss curve and radiation efficiency curve of Ant B in the case where the wave absorbing structural member 300 is farther away from the first electrical connection member 210 and the second electrical connection member 220 . The dotted line corresponds to the return loss curve and the radiation efficiency curve of Ant B in the case where the antenna assembly shown in FIG. 2 is not provided with the wave absorbing structural member 300 , as a reference for comparison.

Based on the situations shown in FIGS. 22 and 23 , for Ant B, the wave absorbing structure 300 can effectively suppress the cavity effect near 1850 MHz, and can increase the radiation efficiency of the antenna assembly by 0.9 dB.

To sum up, compared with the above-mentioned technical solution of using the conductive structure 10 to suppress the effect of the resonant cavity, although the method of adding the wave absorbing structure 300 in the present application can only improve the radiation efficiency of the antenna assembly by 0.3dB, however, In the overall design, it is possible to reduce the addition of a conductive structure 10 requiring gold plating, which greatly reduces the material cost, and there is no risk of EMC due to the connection stability of the conductive structure 10 .

FIG. 24 and FIG. 25 show whether there is a wave absorbing structural member 300 in the antenna assembly, and when the structure of the wave absorbing structural member 300 is different, when Ant B is excited, it passes through the first electrical connection member 210 and the second electrical connection member 210. The current value of the electrical connector 220 is compared. Wherein, the solid triangle line corresponds to the case where the antenna assembly shown in FIG. 6 is provided with double wave absorbing structural members 300 and is close to the first electrical connector 210 and the second electrical connector 220 , and when Ant B is excited, it passes through the first electrical connector The current values of 210 and the second electrical connector 220 are compared. The square dotted line corresponds to the antenna assembly shown in FIG. 3 is provided with a single-piece wave absorbing structure 300 , and compared with the wave absorbing structure 300 and the first electrical connector 210 and the second electrical connector 220 in FIG. 6 , FIG. 3 In the case where the wave absorbing structure 300 is farther away from the first electrical connector 210 and the second electrical connector 220, the current value passing through the first electrical connector 210 and the second electrical connector 220 when the Ant B is excited Compared. The dotted line corresponds to the comparison of the current values passing through the first electrical connector 210 and the second electrical connector 220 when the antenna assembly shown in FIG. 2 is not provided with the wave absorbing structural member 300 when the Ant B is excited, as a reference for comparison .

22 and 23, in the case where the wave absorbing structural member 300 is provided in the antenna assembly, not only the radiation efficiency of Ant B can be improved, but also the first electrical connection member 210 and the second electrical connection member 220 can be The coupled current drops significantly.

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

Among them, for the first electrical connector 210, when the Ant B is excited, the resonant cavity effect is mainly used to couple the energy to the first electrical connector 210 at the far end, and the wave absorbing structure 300 can effectively suppress the resonant cavity effect, so that the The current of the first electrical connection member 210 has a larger drop, and the larger the area of the wave absorbing structural member 300 is, the closer it is to the first electrical connection member 210 , the better the current suppression effect on the first electrical connection member 210 is. Since the original current on the first electrical connector 210 is relatively large, usually close to 330 mA, a gold-plated sheet must be added. However, after adopting the technical solutions provided by the embodiments of the present application, that is, after adding the wave absorbing structural member 300 to the antenna assembly, the current of the first electrical connection member 210 can be greatly reduced, so that only a conventional electrical connection member 210 needs to be used. The electrical connector 201 is sufficient, and there is no need to add a gold-plated sheet or perform a gold-plating operation for the first electrical connector 210 , thereby saving the use of one gold-plated sheet.

For the second electrical connector 220, since it is relatively close to Ant B, the current coupled to the second electrical connector 220 when Ant B is excited can be divided into two parts, one of which is the second electrical connector 220 As the RF return point of Ant B, some current flows through, which conforms to the current mode characteristics of the antenna 110 body. The other part is that the second electrical connector 220, as a part of the resonant cavity, will couple the energy of Ant B, and this part of the current can be suppressed by the wave absorbing structure 300, so as to reduce the size of this part of the current. For Ant B, the main function of the second electrical connector 220 is to serve as the RF reflow point, and the current generated by the resonant cavity effect is much lower than the current of the first electrical connector 210 , so the absorbing structures 300 with different areas are The current suppression effect on the second electrical connection member 220 is not much different. But for the case of exciting Ant A, the current of the second electrical connector 220 is mainly generated by the resonator effect coupling. In this case, the closer the wave absorbing structure 300 is to the second electrical connector 220, the more The current drops even more.

Based on any of the above embodiments, the present application further discloses an electronic device, the electronic device includes a display screen 500, a frame 400 and the antenna assembly disclosed in any of the above embodiments, of course, the electronic device may also include a casing, a processor and a camera Modules and other devices, considering the brevity of the text, will not be described in detail here.

The antenna 110 in the antenna assembly is connected to the outer circumference 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 connected to the conductive part of the frame 400. The frame 400 is electrically connected 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 bracket 530 , and the touch module 520 may 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. Mutual interference between the entire display screen 500 and the antenna assembly can reduce the loss of efficiency of the antenna assembly. In the process of connecting 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 .

More specifically, in the process of designing the wave absorbing structural member 300 , the thickness of the wave absorbing structural member 300 can be made equal to the distance between the metal bracket 530 and the frame 400 . In another embodiment of the present application, the wave absorbing structural member 300 can be installed on the frame 400 , and the wave absorbing structural member 300 and the display screen 500 can be arranged at intervals, that is, the thickness of the wave absorbing structural member 300 is smaller than that of the frame 400 and the distance between the absorbing structure 300 and the metal support 530, thereby reducing the difficulty of assembling the antenna assembly and preventing the absorbing structure 300 from being squeezed due to component tolerances or assembly errors. The display screen 500 ensures that the display effect of the display screen 500 is good, and the service life of the display screen 500 is relatively high.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in the reverse order depending on the functions involved. To perform functions, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to some examples may be combined in other examples.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims (10)

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.

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