CN114899599A - Antenna assembly and electronic equipment - Google Patents

Abstract

Embodiments of the present application disclose an antenna assembly and an electronic device. The antenna assembly includes: a first antenna, including a first radiator, a first matching module and a first feed module; wherein the first radiator has a first ground terminal and a first radiation end; wherein the first feed A first connection point is set between the point and the first radiating end; the second antenna includes a second radiator, a second matching module and a second feeding module; wherein the second radiator has a second radiating end and a second a grounding end; wherein, there is a radiator gap between the second radiation end and the first radiation end; wherein a second connection point is set between the second feeding point and the second radiation end; a band-stop filter circuit, one end is connected to the The first connection point is connected to the second connection point at the other end for reducing the coupling between the first radiator and the second radiator.

Description

An antenna assembly and electronic device

technical field

The embodiments of the present application relate to the field of electronic circuits, and in particular, to an antenna assembly and an electronic device.

Background technique

The number of antennas on electronic equipment is large and the arrangement is dense, resulting in strong coupling between antennas; in order to ensure sufficient isolation, it is usually necessary to leave a certain spatial distance between antenna units. Since the above method will increase the space occupied by the antenna, and the decoupling effect needs to be further improved, how to decouple the antennas is an urgent problem to be solved.

SUMMARY OF THE INVENTION

In order to solve any of the above technical problems, embodiments of the present application provide an antenna assembly and an electronic device.

In order to achieve the purpose of the embodiments of the present application, the embodiments of the present application provide an antenna assembly, including:

The first antenna includes a first radiator, a first matching module and a first feeding module; wherein the first radiator has a first ground end and a first radiation end, and is located at the first ground end and the first radiator The first feeding point between the first radiation ends, the first matching module is electrically connected between the first feeding point and the first feeding module, and the first ground terminal is electrically connected to the first feeding point. a reference ground; wherein, a first connection point is provided between the first feeding point and the first radiating end;

The second antenna includes a second radiator, a second matching module and a second feeding module; wherein the second radiator has a second radiation end and a second ground end, and is located at the second radiation end and all a second feeding point between the second ground terminals, the second matching module is electrically connected between the second feeding point and the second feeding module, and the second ground terminal is electrically connected to a second reference ground; wherein a radiator gap exists between the second radiation end and the first radiation end; wherein a second connection is provided between the second feed point and the second radiation end point;

A band-stop filter circuit, one end of which is connected to the first connection point and the other end of which is connected to the second connection point, is used to reduce the coupling between the first radiator and the second radiator.

An electronic device provided with the antenna assembly described above.

One of the technical solutions in the above-mentioned technical solutions has the following advantages or beneficial effects:

A blocking filter circuit is constructed where the ends of the radiators of the two antennas are close to each other to reduce the coupling between the first radiator and the second radiator, realize the decoupling of the two antennas, improve the isolation, and further improve the Antenna efficiency.

Other features and advantages of the embodiments of the present application will be set forth in the description that follows, and in part will be apparent from the description, or learned by practice of the embodiments of the present application. The objectives and other advantages of the embodiments of the application may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solutions of the embodiments of the present application, and constitute a part of the description. The accompanying drawings are used to explain the technical solutions of the embodiments of the present application together with the embodiments of the embodiments of the present application, and do not constitute the technical solutions of the embodiments of the present application. limits.

FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

Fig. 2 is a three-dimensional schematic diagram of the electronic device shown in Fig. 1;

FIG. 3 is a schematic structural diagram of the antenna assembly 100 provided by the present application;

FIG. 4 is a schematic diagram of a band-stop filter circuit 30 provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of the deployment of the antenna assembly 100 provided in Embodiment 1 of the present application;

6 is a schematic diagram of the relative positions of the first radiator 11 and the second radiator 21 according to the first embodiment of the application;

FIG. 7 is a schematic diagram of a band-stop filter circuit 30 provided in Embodiment 1 of the present application;

FIG. 8 is a schematic diagram of an equivalent capacitance in the band-stop filter circuit 30 shown in FIG. 7;

FIG. 9 is a schematic diagram of a dielectric substrate provided in Embodiment 1 of the present application;

FIG. 10 is another schematic diagram of the band-stop filter circuit 30 provided in Embodiment 1 of the present application;

FIG. 11 is a schematic diagram of the deployment of the first inductor L1 shown in FIG. 10;

FIG. 12 is a schematic structural diagram of the first inductor L1 shown in FIG. 10;

FIG. 13 is a schematic diagram of the deployment of the antenna assembly 100 according to Embodiment 2 of the present application;

FIG. 14 is a schematic diagram of the band-stop filter circuit 30 in the second embodiment of the application;

FIG. 15 is another schematic diagram of the band-stop filter circuit 30 shown in FIG. 14;

16 is a comparison diagram of the S-parameters of the first antenna 10 and the second antenna 20 without decoupling and after decoupling;

FIG. 17 is a comparison diagram of the efficiency of the first antenna 10 before and after decoupling.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clearly understood, the embodiments of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other unless there is a conflict.

Please refer to FIG. 1 , which is a schematic structural diagram of an electronic device according to an embodiment of the present application. Electronic device 1000 includes antenna assembly 100 . The antenna assembly 100 is used for transmitting and receiving electromagnetic wave signals, so as to realize the communication function of the electronic device 1000 . The present application does not specifically limit the position of the antenna assembly 100 in the electronic device 1000 . The electronic device 1000 further includes a display screen 300 and a casing 200 that are connected to each other by covering.

The antenna assembly 100 may be disposed inside the casing 200 of the electronic device 1000 , or partially integrated with the casing 200 , or partially disposed outside the casing 200 . The radiator of the antenna assembly 100 in FIG. 1 is integrated with the housing 200 . Of course, the antenna assembly 100 can also be provided on the retractable assembly of the electronic device 1000, in other words, at least part of the antenna assembly 100 can also extend out of the electronic device 1000 along with the retractable assembly of the electronic device 1000, and can be extended with the retractable assembly of the electronic device 1000. The assembly retracts into the electronic device 1000; alternatively, the overall length of the antenna assembly 100 extends as the retractable assembly of the electronic device 1000 extends.

Electronic equipment 1000 includes, but is not limited to, telephones, televisions, tablet computers, mobile phones, cameras, personal computers, laptop computers, in-vehicle devices, headphones, watches, wearable devices, base stations, in-vehicle radars, and Customer Premise Equipment (CPE) Devices that can send and receive electromagnetic waves. In this application, the electronic device 1000 is taken as an example of a mobile phone. For other devices, reference may be made to the specific description in this application.

For ease of description, with reference to the viewing angle of the electronic device 1000 in FIG. 1 , the width direction of the electronic device 1000 is defined as the X-axis direction, the length direction of the electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the electronic device 1000 is defined as the Z-axis direction axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. Among them, the direction indicated by the arrow is the forward direction.

Please refer to FIG. 2 , the casing 200 includes a frame 210 and a back cover 220 . A middle plate 410 is formed in the frame 210 by injection molding, and a plurality of installation grooves for installing various electronic devices are formed on the middle plate 410 . The middle plate 410 and the frame 210 together become the middle frame 420 of the electronic device 1000 . After the display screen 300 , the middle frame 420 and the back cover 220 are closed, a receiving space is formed on both sides of the middle frame 420 . One side (eg, the rear side) of the frame 210 surrounds the periphery of the back cover 220 , and the other side (eg, the front side) of the frame 210 surrounds the periphery of the display screen 300 .

The electronic device 1000 also includes a battery, a camera, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc., which are arranged in the accommodating space and can realize the basic functions of the mobile phone, which will not be repeated in this embodiment. .

The antenna assembly 100 provided by the present application will be specifically described below with reference to the accompanying drawings. Of course, the antenna assembly 100 provided by the present application includes but is not limited to the following embodiments.

Referring to FIG. 3 , the antenna assembly 100 includes at least a first radiator 11 , a second radiator 21 , a first matching module M1 , a first feeding module 13 , a second matching module M2 and a second feeding module 23 . Wherein, in order to facilitate the functional division of different parts of the antenna assembly 100 for the convenience of subsequent description, the first radiator 11, the second radiator 21, the first matching module M1, and the first feeding module 13 are defined as the first antenna unit 10. Define the first radiator 11 , the second radiator 21 , the second matching module M2 and the second feeding module 23 as the second antenna unit 20 .

Referring to FIG. 3 , the first radiator 11 has a first ground terminal 111 and a first radiation terminal 112 , and a first feeding point A between the first ground terminal 111 and the first radiation terminal 112 . In this embodiment, the first ground end 111 and the first radiation end 112 are opposite ends of the first radiator 11 in the shape of a straight line. In other embodiments, the first radiator 11 is in a bent shape, the first ground end 111 and the first radiation end 112 may not be opposite to each other in a straight line direction, but the first ground end 111 and the first radiation end 112 are the first radiator Both ends of 11.

Referring to FIG. 3 , the second radiator 21 has a second radiation end 211 and a second ground end 212 , and a second feed point B between the second radiation end 211 and the second ground end 212 . A radiator gap 140 exists between the second radiation end 211 and the first radiation end 112 . In this embodiment, the second radiation end 211 and the second ground end 212 are two ends of the second radiator 21 . Optionally, the first radiator 11 and the second radiator 21 may be arranged in a straight line or approximately in a straight line (ie, there is a small tolerance in the design process).

Of course, in other embodiments, the first radiator 11 and the second radiator 21 may also be staggered in the extending direction to form an escape space and the like.

Referring to FIG. 3 , the first radiation end 112 and the second radiation end 211 are opposite to each other and arranged at intervals. The radiator slot 140 is a slit between the first radiator 11 and the second radiator 21 . For example, the width of the radiator slot 140 may be 0.5˜2 mm, but is not limited to this size. The first radiator 11 and the second radiator 21 can be regarded as two parts formed by the radiator being cut off by the radiator slot 140 .

Preferably, the first radiator 11 and the second radiator 21 are capacitively coupled through the radiator slot 140 . Wherein, "capacitive coupling" means that an electric field is generated between the first radiator 11 and the second radiator 21, the signal of the first radiator 11 can be transmitted to the second radiator 21 through the electric field, and the signal of the second radiator 21 The signal can be transmitted to the first radiator 11 through the electric field, so that the first radiator 11 and the second radiator 21 can achieve electrical signal conduction even in a state of not directly contacting or not directly connecting.

It can be understood that the shape and structure of the first radiator 11 and the second radiator 21 are not specifically limited in this application. The shapes of the first radiator 11 and the second radiator 21 include but are not limited to strips, sheets shape, rod shape, coating, film, etc. When the first radiator 11 and the second radiator 21 are strip-shaped, the application does not limit the extension trajectories of the first radiator 11 and the second radiator 21 , so the first radiator 11 and the second radiator 21 All can be extended in straight lines, curves, multi-segment bending and other trajectories. The above-mentioned radiator may be a line with uniform width on the extending track, or may be a bar with varying width, such as a gradual change in width, a widened area, or the like.

Please refer to FIG. 3 , the first matching module M1 is electrically connected between the first feeding point A and the first feeding module 13 . The first power feeding module 13 is a radio frequency transceiver chip for transmitting radio frequency signals or a power feeding part that is electrically connected to the radio frequency transceiver chip for transmitting radio frequency signals. The first matching module M1 may include at least one of a switching device, a capacitive device, an inductive device, a resistive device, and the like.

Please refer to FIG. 3 , the first ground terminal 111 is electrically connected to the first reference ground GND1, and the electrical connection method includes but is not limited to direct welding, or indirect electrical connection through coaxial lines, microstrip lines, conductive elastic sheets, conductive glue, etc. . The present application does not limit the specific position of the first feeding point A on the first radiator 11 .

Referring to FIG. 3 , the second antenna unit 20 includes a first radiator 11 , a second radiator 21 , a second matching module M2 and a second feeding module 23 .

Please refer to FIG. 3 , the second matching module M2 is electrically connected between the second feeding point B and the second feeding module 23 . The second power feeding module 23 is a radio frequency transceiver chip for transmitting radio frequency signals or a power feeding part that is electrically connected to the radio frequency transceiver chip for transmitting radio frequency signals. The second matching module M2 includes at least one of a switching device, a capacitive device, an inductive device, a resistive device, and the like.

Please refer to FIG. 3 , the second ground terminal 212 is electrically connected to the second reference ground GND2, and the electrical connection method includes but is not limited to direct welding, or indirect electrical connection through coaxial lines, microstrip lines, conductive elastic sheets, conductive glue, etc. . The present application does not limit the specific position of the first feeding point A on the first radiator 11 .

The first reference ground GND1 and the second reference ground GND2 include but are not limited to the following embodiments. Optionally, the antenna assembly 100 itself has a reference ground. The specific form of the reference ground includes, but is not limited to, a metal conductive plate, a metal conductive layer formed inside a flexible circuit board, a rigid circuit board, and the like. The first reference ground GND1 and the second reference ground GND2 may be an integrally formed reference ground in the antenna assembly 100 , or may be two reference grounds in the antenna assembly 100 that are independent but connected to each other. When the antenna assembly 100 is installed in the electronic device 1000 , the reference ground of the antenna assembly 100 is electrically connected to the reference ground of the electronic device 1000 . Alternatively, the antenna assembly 100 itself does not have a reference ground, and the first ground terminal 111 and the second ground terminal 212 of the antenna assembly 100 are electrically connected to the reference ground of the electronic device 1000 or the electronic device through direct electrical connection or indirect electrical connection through a conductive member. Ground reference for electronics within 1000. In the present application, the antenna assembly 100 is provided in the electronic device 1000, and the metal alloy on the middle board 410 is used as the reference ground GND. That is, the first reference ground GND1 and the second reference ground GND2 are part of the mid-board 410 or are electrically connected to the mid-board 410 .

Referring to FIG. 3 , a first connection point C is arranged between the first feeding point A and the first radiation end 112 ; a first connection point C is arranged between the second feeding point B and the second radiation end 212 the second connection point D;

The antenna assembly 100 further includes:

A band stop filter circuit (Band Stop Filter, BSF) 30, one end is connected to the first connection point C, and the other end is connected to the second connection point D, for reducing the first radiator 11 and the second radiation coupling between bodies 21.

As shown in FIG. 3 , the first antenna 10 and the second antenna 20 are two port-to-port IFA (Inversed-F Antenna, inverted-F antenna) antennas, and the distance between the radiators of the two antennas is very small. Therefore, the first antenna 10 and the second antenna 20 will generate strong mutual coupling and poor isolation.

As shown in Figure 3, constructing a blocking filter circuit in a position where the ends of the radiators of the two antennas are close to each other can effectively reduce the energy coupled from the radiator of one antenna to the radiator of the other antenna, and reduce the The coupling between the first radiator and the second radiator realizes the decoupling of the two antennas, improves the isolation, and further improves the efficiency of the antenna.

It should be noted that the description is given by taking the antenna as an IFA as an example, and the same applies to other types of antennas.

Please refer to FIG. 4 , which is a schematic diagram of a band-stop filter circuit 30 provided by an embodiment of the present application. The band-stop filter circuit 30 includes a first branch 30A and a second branch 30B connected in parallel; wherein the first branch is a capacitor; and the second branch is an inductance.

The first branch 30A and the second branch 30B form an equivalent resonant circuit, wherein the first branch 30A is used to determine the resonant frequency of the band-stop filter circuit, and the inductance of the second branch 30B determines the band-stop filter circuit. The operating frequency of the filter circuit.

By connecting the band-stop filter circuit 30 between the first antenna 10 and the second antenna 20 in series, the isolation between the first antenna 10 and the second antenna 20 is improved.

Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic diagram of the deployment of the antenna assembly 100 according to Embodiment 1 of the present application. FIG. 6 is a schematic diagram of the relative positions of the first radiator 11 and the second radiator 21 according to Embodiment 1 of the present application. In FIG. 5 , both the first antenna 10 and the second antenna 20 are disposed on the same side of the electronic device 1000 , wherein the first antenna is disposed on the first surface 61 of the dielectric substrate 600 , and the second radiator 21 (not shown in the figure) out) is deployed on the second surface 62 of the dielectric substrate 600 . The first ground terminal 112 and the second ground terminal 212 are not shown in FIG. 6 . The first radiator 11 and the second radiator 12 are parallel to each other, and the parallel projection of one radiation end of the first radiator 11 and the second radiator 12 is located on the first radiator 11 and the second radiator 12 on the other of the radiators 12. In FIG. 6, the parallel projection of the first radiation end 112 is adjacent to the second radiator 21 and adjacent to the second radiation end 212; the parallel projection of the second radiation end 212 is adjacent to the first radiator 11 and adjacent to the first radiation end 112. With the first radiator and the second radiator being parallel to each other, a radiator gap exists between the first radiator end 112 and the second radiator end 212, and at the same time, due to the first radiator 11 and the second radiator The bodies 12 are parallel to each other, so that the first radiator 11 and the second radiator 12 are not on the same plane, so that the first radiator and the second radiator partially overlap, thereby effectively reducing the first radiator 11 And the space occupied by the second radiator 12 improves the space utilization rate.

Compared with the related art in which the first radiator 11 and the second radiator 21 are disposed on the same surface, the length of the required dielectric substrate can be effectively reduced, and the utilization rate of space can be improved.

Please refer to FIG. 7 , which is a schematic diagram of the band-stop filter circuit 30 provided in Embodiment 1 of the present application. The band-stop filter circuit 30 includes:

a first connection area 31 located on the first radiator, the first connection area 31 is arranged between the first connection point and the first radiation end;

a second connection area 32 on the second radiator, the second connection area 32 is arranged between the second connection point and the second radiation end;

One end of the conductive device 33 is connected to the first connection region 31 , and the other end is connected to the second connection region 32 .

Referring to FIG. 7 , the first connection area 31 on the first radiator 11 is connected to the first radiator through the first connection point C, and the second connection area 32 on the second radiator 21 is connected to the first radiator through the second connection point D The two radiators 21 are connected. The conductive device 33 is connected to the first connection area 31 and the second connection area 32 to achieve the purpose of connecting the band-stop filter circuit between the first radiator 11 and the second radiator 21 in series.

Please refer to FIG. 8 , which is a schematic diagram of an equivalent capacitor in the band-stop filter circuit 30 shown in FIG. 7 . Please also refer to FIG. 6 , the projection of the first radiation end 112 on the second surface 62 is located in the region corresponding to the second radiator 21 on the second surface 62 ; the second radiation end 212 is on the first surface The projection of 61 is located in the region corresponding to the first radiator 11 on the first surface 61 , so that the first radiator 11 and the second radiator 12 partially overlap in space. Since two parallel radiators can form a pair of parallel plate capacitors, specifically, the area facing the first radiator 11 and the second radiator 21 forms an equivalent capacitance, forming the first branch 30A, which determines the band resistance The resonant frequency of the filter circuit.

Further, according to the distributed parameter circuit model, it is equivalent to a pair of distributed parameter capacitors C1 and distributed parameter capacitors C2. Wherein, the relative area of the area of the first radiator 11 adjacent to the first radiation end 112 determines the size of the distributed parameter capacitance C1, and the relative area of the area of the second radiator 21 adjacent to the first radiation end 212 determines the distribution parameter The size of capacitor C2. Among them, distributed parameter capacitance C1 and distributed parameter capacitance C2.

The conductive device 33 can be equivalent to an inductance. Therefore, the band-stop filter circuit of the above structure realizes a resonant circuit in which the equivalent inductance and the equivalent capacitance are parallel.

Preferably, the conductive device 33 is a metal body, and the metal body is connected to the first connection area and the second connection area by welding.

The above connection method is simple to implement and has low hardware cost.

In an embodiment of the present application, the dielectric substrate is provided with through holes corresponding to the first connection area and the second connection area;

The conductive device is connected to the first connection area and the second connection area through the through hole.

Please refer to FIG. 9 , which is a schematic diagram of a dielectric substrate provided in Embodiment 1 of the present application. By arranging the through holes 63 on the dielectric substrate 600 , the conductive device 33 can be easily passed through, thereby connecting the first radiator 11 and the second radiator 12 , the hardware structure is more compact, and the space utilization rate is high.

In an embodiment of the present application, the band-stop filter circuit includes a first inductance L1 connected between the first connection region 31 and the first connection point C; and/or, connected to the first connection point C; The second inductance L2 between the second connection region 32 and the second connection point D.

Please refer to FIG. 10 , which is another schematic diagram of the band-stop filter circuit 30 shown in FIG. 4 . Taking the band-stop filter circuit 30 including the first inductor L1 and the second inductor L2 as an example, the first inductor L1 and the second inductor L2 and the equivalent inductance of the conductive device are connected in series to form an equivalent inductance, which is the first inductor L1 and the second inductor L2. The second branch 30B is used to determine the operating frequency of the band-stop filter circuit.

In an embodiment of the present application, the first radiator 11 is provided with a first slot 311 surrounding the first connection region 31, wherein the first inductor L1 is arranged in the first slot 311; and / or,

The second radiator 21 is provided with a second slot 321 surrounding the second connection region 32 , wherein the second inductor L2 is arranged in the second slot 321 .

Please refer to FIG. 11 , which is a schematic diagram of the deployment of the first inductor L1 shown in FIG. 10 . Take the first inductor L1 deployed at the end of the first radiator 11 as an example for description. The first slot 311 can be arranged around the first connection region 31 , and the first inductor L1 can be arranged in the first slot 311 , so as to achieve the purpose of arranging inductance elements in the band-stop filter circuit and effectively utilize space.

Optionally, the band-stop filter circuit 30 further includes:

the first equivalent inductance formed by the coil etched on the first surface 61; and/or,

The second equivalent inductance formed by the coil etched on the second surface 62 .

Please refer to FIG. 12 , which is a schematic structural diagram of the first inductor L1 shown in FIG. 10 . As shown in FIG. 11 , a coil is formed by etching on the first surface 61 in an annular manner to constitute a first equivalent inductance.

Further, when at least one of the first equivalent inductance and the second equivalent inductance is set, at least one of the first inductance and the second inductance can also be set, wherein the first inductance is connected to the first connection between the second connection area and the first connection point; the second inductor is connected between the second connection area and the second connection point.

Please refer to FIG. 13 . FIG. 13 is a schematic diagram of the deployment of the antenna assembly 100 according to Embodiment 2 of the present application. The first radiator 11 and the second radiator 21 are both located on the same surface of the dielectric substrate 600, such as the first surface 61 or the second surface 62;

Please refer to FIG. 14 . FIG. 14 is a schematic diagram of the band-stop filter circuit 30 in the second embodiment of the present application. The band-stop filter circuit 30 includes one or more first radiation extension units 34 connected to the first radiation end 112, one or more second radiation extension units 35 connected to the second radiation end 212, A second radiation extension unit 35 is provided between at least two of the first radiation extension units 34 ; and/or, at least two of the second radiation extension units 35 are provided with the first radiation extension unit 34 .

Since the first radiator 11 and the second radiator 21 are located on the same layer of the dielectric substrate 600 , the first radiator 11 and the second radiator can be formed by intersecting the first radiation extension unit 33 and the second radiation extension unit 34 The relative area of the body 21 is formed, thereby forming an equivalent capacitance and realizing the construction of the first Han branch 30A.

Please refer to FIG. 15 , which is another schematic diagram of the band-stop filter circuit 30 shown in FIG. 14 . The band-stop filter circuit 30 further includes a third inductor L3 connected to the adjacent first radiation extension unit 33 and the second radiation extension unit 34 .

The gap between the adjacent first radiation extension unit 33 and the second radiation extension unit 34 is used to set the inductance device, so as to complete the construction of the second branch 30B in the band-stop filter circuit

Optionally, a third equivalent inductance formed by a coil etched on the first or second surface.

The structure of the third equivalent inductor can refer to the structure shown in FIG. 11 .

To sum up, by setting the band-stop filter circuit, the decoupling of the first antenna 10 and the second antenna 20 is realized, and the isolation degree and the radiation efficiency of the antenna are improved.

The embodiment of the present application provides an electronic device 1000, which is provided with any one of the antenna assemblies 100 above.

For illustration, the electronic device 1000 is provided with the first antenna 10 and the second antenna 20 on the same side as an example, wherein the first antenna 10 and the second antenna 20 are co-frequency antennas.

According to the arrangement in the related art, the two are arranged approximately in mirror symmetry, the radiators are parallel to each other, and the distance between the ends of the radiating arms is relatively close, so that the coupling degree between the first antenna 10 and the second antenna 20 is high, wherein the first antenna 10 For the S-parameter curve, refer to the curve S1 shown in FIG. 16 , 1 is not decoupled, and the S-parameter curve of the first antenna 20 refers to the curve S2 shown in FIG. 16 , 1 is not decoupled.

After the band-stop filter circuit is set, the coupling degree between the first antenna 10 and the second antenna 20 is reduced, wherein the S-parameter curve of the first antenna 10 is shown in the curve S1 shown in FIG. 15. After decoupling 1, the first antenna For the S-parameter curve of 20, see the curve S2,1 shown in Figure 16 after decoupling.

Please refer to FIG. 16 , FIG. 16 is a comparison diagram of the S-parameters of the first antenna 10 and the second antenna 20 without decoupling and after decoupling. Before the BSF decoupling structure is added, the coupling between the first antenna 10 and the second antenna 20 is very strong, and the isolation is very poor. After adding the decoupling structure, a sag appears at the original peak of the transmission coefficient, which is the resonance point of the band-stop filter.

Taking the same working frequency of the first antenna 10 and the second antenna 20 as an example, when the first antenna 10 is excited, since the ends of the first antenna 10 and the second antenna 20 are very close, the polarizations are parallel, and the working frequencies are the same, so the coupling Very strong, the current strength on the two antennas is almost equal. After the band-stop filter circuit is added, the current coupled to the second antenna 20 is significantly reduced.

Please refer to FIG. 17 . FIG. 17 is a comparison diagram of the radiation efficiency of the first antenna 10 without decoupling and after decoupling. When the first antenna 10 is excited, since the power coupled to the second antenna 20 is reduced, the energy can be radiated into the free space, and the radiation efficiency is significantly improved.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, functional modules/units in the systems, and devices can be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components Components execute cooperatively. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules or other data flexible, removable and non-removable media. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium used to store desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media, as is well known to those of ordinary skill in the art .

Claims (11)

1. An antenna assembly, comprising:

the first antenna comprises a first radiator, a first matching module and a first feed module; the first radiator is provided with a first grounding end, a first radiation tail end and a first feeding point positioned between the first grounding end and the first radiation tail end, the first matching module is electrically connected between the first feeding point and the first feeding module, and the first grounding end is electrically connected to a first reference ground; wherein a first connection point is arranged between the first feed point and the first radiation tail end;

the second antenna comprises a second radiator, a second matching module and a second feed module; the second radiator is provided with a second radiation tail end and a second grounding end, and a second feeding point is positioned between the second radiation tail end and the second grounding end, the second matching module is electrically connected between the second feeding point and the second feeding module, and the second grounding end is electrically connected to a second reference ground; a radiator gap is formed between the second radiation end and the first radiation end; wherein a second connection point is arranged between the second feeding point and the second radiating end;

and one end of the band elimination filter circuit is connected with the first connecting point, and the other end of the band elimination filter circuit is connected with the second connecting point, and is used for reducing the coupling between the first radiator and the second radiator.

2. The antenna assembly of claim 1, wherein the band-reject filter circuit comprises a first branch and a second branch connected in parallel; wherein the first branch comprises a capacitive device and the second branch comprises an inductance.

3. The antenna assembly of claim 2, wherein:

the first radiator and the second radiator are isolated by a dielectric substrate, wherein the dielectric substrate is provided with a first surface and a second surface which are mutually deviated, the first radiator is arranged on the first surface, the second radiator is arranged on the second surface, and the parallel projection of one radiation tail end of the first radiator and the second radiator is positioned on the other radiator of the first radiator and the second radiator;

the band-stop filter circuit includes:

a first connection region on the first radiator, the first connection region disposed between the first connection point and the first radiating end;

a second connection region on the second radiator, the second connection region disposed between the second connection point and the second radiation end;

and one end of the conductive device is connected with the first connecting area, and the other end of the conductive device is connected with the second connecting area.

4. The antenna assembly of claim 3, wherein:

the medium substrate is provided with through holes corresponding to the first connection area and the second connection area;

the conductive device is connected to the first connection region and the second connection region through the through hole.

5. The antenna assembly of claim 3, wherein the band-reject filter circuit further comprises:

a first inductor connected between the first connection region and the first connection point; and/or the presence of a gas in the atmosphere,

a second inductor connected between the second connection region and the second connection point.

6. The antenna assembly of claim 5, wherein:

a first slot surrounding the first connection region is arranged on the first radiator, wherein the first inductor is arranged in the first slot; and/or the presence of a gas in the gas,

a second slot surrounding the second connection area is arranged on the second radiator, wherein the second inductor is arranged in the second slot.

7. The antenna assembly of claim 3, wherein the inductive device comprises:

a first equivalent inductor formed by etching a first coil on the first surface; and/or the presence of a gas in the gas,

and a second equivalent inductor formed by etching the second coil on the second surface.

8. The antenna assembly according to claim 3, characterized in that the projection of the first radiating end on the second surface is located in a region of the second radiator corresponding to the second surface; the projection of the second radiation tail end on the first surface is positioned in a region of the first radiator corresponding to the first surface;

the opposite regions of the first radiator and the second radiator form equivalent capacitance.

9. The antenna assembly of claim 2, wherein:

the first radiator and the second radiator are both positioned on the first surface or the second surface of the dielectric substrate;

the band-stop filter circuit comprises one or more first radiation extension units connected with the first radiation tail end and one or more second radiation extension units connected with the second radiation tail end, wherein a second radiation extension unit is arranged between at least two first radiation extension units, and/or at least two second radiation extension units are provided with the first radiation extension units.

10. The antenna assembly of claim 9, wherein:

the band-stop filter circuit also comprises a third inductor connected with the adjacent first radiation extension unit and the second radiation extension unit; or a third equivalent inductor formed by etching a coil on the first or second surface.

11. An electronic device, characterized in that an antenna assembly according to any of claims 1 to 10 is provided.

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