WO2022083276A1

WO2022083276A1 - Antenna array assembly and electronic device

Info

Publication number: WO2022083276A1
Application number: PCT/CN2021/114526
Authority: WO
Inventors: 王泽东
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-10-22
Filing date: 2021-08-25
Publication date: 2022-04-28
Also published as: CN112397898B; CN112397898A

Abstract

Provided are an antenna array assembly and an electronic device. The antenna array assembly comprises a plurality of antenna units, which are arranged spaced apart from one another in a first direction. In any two adjacent antenna units, the distance between geometric centers of radiators, which respectively belong to the two antenna units, ranges from 0.15 λ to 0.25 λ, wherein λ represents the wavelength of an electromagnetic wave radiated by the antenna array assembly. Provided are an antenna array assembly having a reduced size and an expanded operating frequency band, and an electronic device having the antenna array assembly.

Description

Antenna Array Components and Electronic Equipment

technical field

The present application relates to the field of communication technologies, and in particular, to an antenna array assembly and an electronic device.

Background technique

With the development trend of miniaturization and thinning of electronic equipment, the antenna array components in electronic equipment are also developing in the direction of miniaturization and wide frequency band. How to reduce the size of antenna array components and widen the working frequency band of antenna array components become a technical problem that needs to be solved.

SUMMARY OF THE INVENTION

The present application provides an antenna array assembly with reduced size and widened operating frequency band and an electronic device having the antenna array assembly.

In a first aspect, an embodiment of the present application provides an antenna array assembly, which includes a plurality of antenna units spaced along a first direction, and any two adjacent antenna units belong to the two antenna units respectively The distance between the geometric centers of the radiators is 0.15λ-0.25λ, where λ is the wavelength of the electromagnetic wave radiated by the antenna array assembly.

In a second aspect, an embodiment of the present application provides an antenna array assembly, including a plurality of antenna units spaced along a first direction, the antenna units including a radiator and a ground plate, and at least two adjacent antenna units A coupling capacitance is formed between the radiators and a capacitive reactance is formed, a coupling inductance is formed between the ground plate and the radiator, and an inductive reactance is formed, and the capacitive reactance of the coupling capacitor cancels at least part of the inductive reactance of the coupling inductance .

In a third aspect, embodiments of the present application provide an electronic device, including the antenna array assembly.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

Fig. 2 is the exploded structure schematic diagram of the electronic device that Fig. 1 provides;

3 is a schematic cross-sectional view of an antenna module in the electronic device provided in FIG. 2;

4 is a schematic cross-sectional view of an antenna array assembly disposed on a frame in the electronic device provided in FIG. 2;

5 is a schematic structural diagram of an antenna array assembly in the electronic device provided in FIG. 2;

FIG. 6 is a schematic structural diagram of an antenna array assembly disposed on a frame in the electronic device provided in FIG. 2;

FIG. 7 is a schematic structural diagram of an antenna unit in the antenna array assembly provided in FIG. 5;

Figure 8 is a cross-sectional view along line A-A of Figure 7;

FIG. 9 is a schematic structural diagram of the first antenna unit in FIG. 6;

Fig. 10 is the top view that Fig. 6 provides the first kind of antenna array assembly;

Figure 11 is the reflection coefficient comparison curve between the 2.8mm*2.8mm strong coupling antenna unit and the independent antenna unit;

12 is an equivalent circuit diagram of a strongly coupled antenna unit provided by an embodiment of the present application;

FIG. 13 is a top view of the first antenna unit and the second antenna unit provided in FIG. 10;

FIG. 14 is a schematic cross-sectional structure diagram of the first antenna unit provided in FIG. 13;

FIG. 15 is a schematic cross-sectional structure diagram of the second type of antenna unit provided in FIG. 13;

FIG. 16 is a schematic cross-sectional structure diagram of the third antenna unit provided in FIG. 13;

FIG. 17 is a schematic cross-sectional structure diagram of the fourth antenna unit provided in FIG. 13;

FIG. 18 is a top view of FIG. 6 providing a second type of antenna array assembly;

Figure 19 is a partial cross-sectional view of the antenna array assembly provided in Figure 18;

20 is a top view of a third antenna array assembly provided by an embodiment of the present application;

FIG. 21 is a top view of a fourth antenna array assembly provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. The embodiments listed in this application can be appropriately combined with each other.

Please refer to FIG. 1 , which is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 1000 can be a phone, a TV, a tablet computer, a mobile phone, a camera, a personal computer, a notebook computer, a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (CPE), etc. A device capable of sending and receiving electromagnetic waves. Taking the electronic device 1000 as a mobile phone as an example, for the convenience of description, the electronic device 1000 is defined with reference to the first viewing angle, the width direction of the electronic device 1000 is defined as the X direction, the length direction of the electronic device 1000 is defined as the Y direction, and the electronic device The thickness direction of 1000 is defined as the Z direction. The direction indicated by the arrow is positive.

Please refer to FIG. 2 , the electronic device 1000 includes the antenna module 100 . The antenna module 100 is used for sending and receiving radio frequency signals, so as to realize the communication function of the electronic device 1000 . At least some components of the antenna module 100 are disposed on the main board 200 of the electronic device 1000 . It can be understood that the electronic device 1000 also includes a display screen 300, a battery 400, a casing 500, a camera, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, and other devices that can realize the basic functions of the mobile phone. In this embodiment, details are not repeated.

Please refer to FIG. 3 , the antenna module 100 includes an antenna array assembly 10 and a radio frequency transceiver chip 20 .

Optionally, the radio frequency transceiver chip 20 is provided on the main board 200 , and the radio frequency transceiver chip 20 is used to generate a signal source of the antenna module 100 and process the received or transmitted signals. The antenna array assembly 10 is used to adjust the phase of the antenna elements to transmit or receive signals.

Optionally, the antenna array assembly 10 and the radio frequency transceiver chip 20 may be disposed separately. For example, the antenna array assembly 10 is disposed in the casing of the electronic device 1000 (or the bracket on the main board 200 of the electronic device 1000, etc.), and the radio frequency transceiver chip 20 is disposed in the electronic device 1000. On the main board 200 of the electronic device 1000, the feeding port 30 (refer to FIG. 3) of the antenna array assembly 10 and the radio frequency port of the radio frequency transceiver chip 20 are directly welded, electrically connected by a coaxial wire, and elastically resisted by a conductive shrapnel. In this way, the antenna array assembly 10 can be combined with other structures on the electronic device 1000, thereby improving the flexibility of the installation position of the antenna array assembly 10 and saving space. Of course, in other embodiments, the antenna module 100 may be an independently formed module, that is, the antenna array assembly 10 and the radio frequency transceiver chip 20 are packaged into a module. During the installation process, the modular antenna module 100 can be installed in the electronic device 1000, so as to improve the installation efficiency.

The antenna module 100 is used for sending and receiving electromagnetic wave signals of a preset frequency band. The preset frequency band includes at least one of a sub-6G frequency band, a millimeter wave frequency band, a submillimeter wave frequency band, a terahertz wave frequency band, and the like. Certainly, the preset frequency band provided in this embodiment may also include at least one of 2G (second generation mobile communication technology), 3G (third generation mobile communication technology), and 4G (fourth generation mobile communication technology) frequency bands. Of course, the preset frequency band provided in this embodiment may also include frequency modulation (Frequency Modulation, FM) transceiver, Bluetooth, Wi-Fi, GPS and other application frequency bands.

This embodiment is described by taking the preset frequency band as an example of a millimeter wave frequency band, and details will not be described in the following. Correspondingly, the antenna module 100 is a millimeter-wave antenna module, which will not be described in detail later.

This application does not specifically limit the position of the antenna array assembly 10 in the electronic device 1000, including but not limited to the following embodiments.

Please refer to FIG. 2 , the housing 500 of the electronic device 1000 includes a frame 501 and a back cover 502 . The frame 501, the aluminum plate and the injection-molded base material arranged in the frame 501 form the middle frame 503 . The display screen 300 and the back cover 502 are respectively covered and connected to opposite sides of the frame 501 . In other words, the display screen 300 and the back cover 502 are also covered and connected to opposite sides of the middle frame 503 . The display screen 300 , the frame 501 and the back cover 502 can form a receiving space. Specifically, after the display screen 300 , the middle frame 503 and the back cover 502 are closed, each of the opposite sides of the middle frame 503 forms accommodation spaces for accommodating electronic devices. In this embodiment, the frame 501, the aluminum plate and the injection-molded substrate inside are integral structures, and the frame 501 and the back cover 502 are separate structures. Of course, in other embodiments, the frame 501 and the aluminum plate and the injection-molded substrate inside are separate structures, and the frame 501 and the back cover 502 are integral structures.

In this embodiment, the antenna array assembly 10 is combined with the frame 501 to save the space occupied by the antenna array assembly 10 in the electronic device 1000 , and the antenna array assembly 10 directly transmits electromagnetic wave signals towards the external environment and receives electromagnetic wave signals in the external environment, so as to The transmission loss of the electromagnetic wave signal is reduced, and the efficiency of the antenna array assembly 10 for sending and receiving electromagnetic wave signals is improved.

In a possible embodiment, please refer to FIG. 4 , the frame 501 is provided with an opening 504 . The antenna array assembly 10 is at least partially disposed within the opening 504 . Specifically, the antenna array assembly 10 is embedded in the opening 504 . The radiation surface of the antenna array assembly 10 faces outside the frame 501 to receive and transmit millimeter-wave signals from external base stations. The radiation surface of the antenna array assembly 10 is exposed to the outer surface of the frame 501 , and other structures of the antenna array assembly 10 can be packaged together with the frame 501 , so that the antenna array assembly 10 is assembled on the frame 501 to form a whole. The surface of the antenna array assembly 10 facing the outside of the frame 501 is flush with the outer surface of the frame 501 , so that the entire surface of the frame 501 is a smooth surface with high flatness. In this embodiment, the radio frequency transceiver chip 20 is disposed on the main board 200 , and the feed of the antenna array assembly 10 is electrically connected to the radio frequency transceiver chip 20 .

In other embodiments, the antenna array assembly 10 is disposed toward the inner surface of the frame 501 , for example, the inner surface of the frame 501 is a curved surface, and the antenna array assembly 10 is disposed towards the inner surface of the frame 501 . The antenna array assembly 10 is attached to the inner surface of the frame 501 or retains a small gap with the inner surface of the frame 501 . The antenna array assembly 10 can have a curved surface structure, so as to effectively utilize the curved shaped space formed by the inner surface of the frame 501 , reduce the space occupied by the antenna array assembly 10 , and improve the space utilization rate in the electronic device 1000 .

In other embodiments, the antenna array assembly 10 is disposed in the receiving space. Specifically, the antenna array assembly 10 can be disposed on the main board 200 and disposed on other supporting brackets.

In other embodiments, the antenna array assembly 10 may also be embedded in the back cover 502 , attached to the inner surface of the back cover 502 , or a part of the structure of the antenna array assembly 10 may be combined with the back cover 502 .

The following embodiments of the present application take the antenna array assembly 10 embedded on the frame 501 of the electronic device 1000 as an example for illustration, and will not be repeated hereafter.

This application does not specifically describe the number of the antenna array components 10 in the electronic device 1000, and the number of the antenna array components 10 may be multiple. The multiple antenna array assemblies 10 can transmit and receive electromagnetic wave signals in the same or different frequency bands. This application takes an antenna array assembly 10 as an example for description.

Referring to FIG. 5 , the antenna array assembly 10 includes a plurality of antenna units 1 . The antenna unit 1 may also be called an array element. A plurality of antenna units 1 can be arranged at intervals or connected together. In this embodiment of the present application, a plurality of antenna units 1 are connected to each other. A plurality of antenna units 1 are located on the same plane or curved surface. The structure and size of each antenna unit 1 may be the same or different. In the embodiment of the present application, the structure and size of the antenna unit 1 are the same. The antenna unit 1 includes, but is not limited to, a waveguide horn antenna, a dipole antenna, a patch antenna, and the like.

The plurality of antenna units 1 are arranged in a one-dimensional linear arrangement or a two-dimensional array. The two-dimensional array distribution can be a matrix distribution with multiple rows and columns, or a triangular matrix distribution, so that the antenna beam can be phase-controlled in both the azimuth and elevation directions.

In an embodiment, please refer to FIG. 6 , the plurality of antenna units 1 are arranged in a one-dimensional linear arrangement. Since the frame 501 of the electronic device 1000 is in the shape of a long strip, the plurality of antenna units 1 are arranged in a linear manner, and the antenna array assembly 10 is in the shape of a strip, so that the antenna array assembly 10 can adapt to the position and shape of the frame 501 in order to facilitate The antenna array assembly 10 can be better integrated on the frame 501 .

For example, the antenna array assembly 10 includes the antenna elements 1 arranged along 1*6. The antenna array assembly 10 is integrated in the left part of the frame 501 of the electronic device 1000 (refer to FIG. 4 ). In other words, the six antenna elements 1 are arranged in the first direction. The first direction is the positive direction of the Y-axis.

Referring to FIG. 6, in order to facilitate the description of the six antenna units 1, the six antenna units 1 are defined as the third antenna unit 13, the fifth antenna unit 15, the first antenna unit 11, the second antenna unit 12, the sixth antenna unit 12, and the sixth The antenna unit 16 and the fourth antenna unit 14 . Wherein, the structure of each antenna unit 1 is the same or different.

Referring to FIG. 7 , the antenna unit 1 includes a radiator 2 . The radiator 2 is a port through which the antenna module 100 transmits signals into the air or receives signals in the air. The material of the radiator 2 is a conductive material, and specific materials include, but are not limited to, metals, transparent conductive oxides (eg, indium tin oxide (ITO)), carbon nanotubes, graphene, and the like. In this embodiment, the material of the radiator 2 is a metal material, such as silver, copper and the like.

The form of the radiator 2 includes, but is not limited to, a metal microstrip line, a metal patch, and the like. According to the type of the antenna unit 1, the form of the radiator 2 includes, but is not limited to, the radiator 2 in the form of a patch, and the radiator 2 in the form of a dipole.

Referring to FIG. 7 , the antenna unit 1 further includes a dielectric plate 3 . The dielectric plate 3 is used to carry the radiator 2 . The material of the dielectric plate 3 is a material with lower loss and better dielectric constant stability. The material of the dielectric plate 3 includes, but is not limited to, polyimide (IP), liquid crystal polymer (LCP), modified polyimide (MIP), and the like. The film-formed dielectric plate 3 has the characteristics of flexibility, lightness and thinness. In other words, the dielectric plate 3 is flexible, so that the antenna array assembly 10 is flexible, so that the antenna array assembly 10 can be attached to a curved surface or a special-shaped surface.

When the antenna array assembly 10 is installed on the frame 501, the length direction of the dielectric plate 3 is the Y-axis direction, the width direction of the dielectric plate 3 is defined as the Z-axis direction, and the thickness direction of the dielectric plate 3 is the X-axis direction.

Referring to FIG. 8 , the medium plate 3 includes a first surface 31 and a second surface 32 arranged opposite to each other along the X-axis direction.

Optionally, a plurality of radiators 2 are provided on the first surface 31 . The second surface 32 faces the radio frequency transceiver chip 2020 .

The specific forming method of the radiator 2 on the first surface 31 of the dielectric plate 3 includes, but is not limited to, laser direct structuring (Laser-Direct-structuring, LDS), laser restructured printing (Laser Restructured Print, LRP) and the like. Of course, in other embodiments, the radiator 2 may also be partially protruded from the first surface 31 and partially embedded in the dielectric plate 3; or, the radiator 2 may be completely embedded between the first surface 31 and the second surface 32 Alternatively, part of the radiator 2 is protruded from the second surface 32 and part is embedded in the dielectric plate 3; or, the radiator 2 is completely protruded from the second surface 32 and the like.

Further, referring to FIG. 8 , the antenna unit 1 further includes a grounding plate 4 , the grounding plate 4 is disposed opposite to the second surface 32 of the dielectric plate 3 , and the grounding plate 4 is the reference ground of the antenna.

Please refer to FIG. 8 , the antenna unit 1 further includes a feed source 5 and a feed column 6 . The feed source 5 is arranged on the side of the ground plate 4 away from the dielectric plate 3 . The ground plate 4 is provided with a through hole. One end of the feed column 6 is electrically connected to the radiator 2 , and the other end of the feed column 6 passes through the ground plate 4 through the through hole of the ground plate 4 and is electrically connected to the feed 5 . It can be understood that the ground plate 4 is made of metal material, such as metal copper, metal silver, and the like. Both the feeding column 6 and the feeding source 5 are made of conductive materials, such as metallic copper, metallic silver, and the like. Further, the feeding column 6 extends along the thickness direction (X-axis direction) of the dielectric plate 3 .

In one embodiment, the antenna unit 1 is a dipole antenna, and the radiator 2 is a dipole radiator 2 to increase the working bandwidth of the antenna unit 1 . In other embodiments, the antenna unit 1 may also be a patch antenna, a microstrip antenna, or the like.

For the first antenna unit 11 , please refer to FIG. 9 , the first antenna unit 11 includes a first radiator 21 . The first radiator 21 includes a first radiating arm 211 and a second radiating arm 212 that are symmetrical and spaced apart, wherein the first radiating arm 211 and the second radiating arm 212 are symmetrical about the first symmetry axis L1 . In this embodiment, the first symmetry axis L1 extends along the second direction, wherein the second direction is a direction perpendicular to the first direction in the plane where the first radiator 21 is located. Specifically, the first direction is the positive direction of the Y-axis, and the second direction is the positive direction of the Z-axis. The plane where the first radiator 21 is located is the Y-Z plane.

In other embodiments, the first axis of symmetry L1 may extend along the first direction.

It can be understood that the shape and size of the first radiation arm 211 and the second radiation arm 212 are the same. Further, for each radiation arm, the radiation arm is an axisymmetric figure symmetrical about the second symmetry axis L2. The extending direction of the second symmetry axis L2 is the second direction. The intersection of the first symmetry axis L1 and the second symmetry axis L2 is the geometric center of the first radiator 21 . It can be understood that the geometric center of the first antenna unit 11 coincides with the geometric center of the first radiator 21 .

The number of the feeding posts 6 is plural. The plurality of feeding columns 6 include a first feeding column 61 and a second feeding column 62 , wherein the first feeding column 61 and the second feeding column 62 are arranged at intervals. Further, the first feeding column 61 and the second feeding column 62 are arranged in parallel, and both the first feeding column 61 and the second feeding column 62 extend along the X-axis direction.

The first feeding column 61 is directly electrically connected or coupled to the first radiation arm 211 . Wherein, "direct electrical connection" means that the first feeding column 61 and the first radiation arm 211 are both made of conductive material and are in direct contact with each other by means of welding, conductive agent bonding, or the like. "Coupling connection" means that there is no contact between the first feeding column 61 and the first radiation arm 211 but capacitive coupling is formed to transmit electrical signals. In this embodiment, the first radiating arm 211 is directly electrically connected to the first feeding column 61 .

One end of the first feeding column 61 is electrically connected to one end of the first radiation arm 211 close to the second radiation arm 212 , and the other end of the first feeding column 61 is electrically connected to the feed source 5 .

One end of the second feeding column 62 is directly electrically connected or coupled to the second radiation arm 212 , and the other end of the second feeding column 62 is electrically connected to the feed source 5 . In this embodiment, one end of the second feeding column 62 is directly electrically connected to one end of the second radiating arm 212 close to the first radiating arm 211 .

The first feeding column 61 and the second feeding column 62 respectively feed the first radiation arm 211 and the second radiation arm 212 .

Of course, in other embodiments, the first radiator 21 is a whole piece of the radiator 2, and the number of the feeding column 6 can be one.

In this embodiment, the first antenna unit 11 and the second antenna unit 12 are disposed adjacent to each other. The structure and size of the second antenna unit 12 are the same as those of the first antenna unit 11 . The second antenna unit 12 includes a second radiator 22, which is also a symmetrical dipole antenna.

This embodiment is specifically described by taking the first antenna unit 11 and the second antenna unit 12 forming capacitive coupling between the antenna unit 1 as an example. For the structural design of the capacitive coupling between any two adjacent antenna elements 1 of the antenna array assembly 10 , reference may be made to the first antenna element 11 and the second antenna element 12 , which will not be repeated here.

In this embodiment, referring to FIG. 10 , in any two adjacent antenna units 1 , the distance between the geometric centers of the radiators 2 belonging to the two antenna units 1 respectively is 0.15λ-0.25λ. For example, the first antenna unit 11 and the second antenna unit 12 are disposed adjacent to each other. The distance between the geometric center of the first antenna unit 11 and the geometric center of the second antenna unit 12 is the unit spacing L3, and the unit spacing L3 is 0.15λ-0.25λ. At this time, the first antenna unit 11 and the second antenna unit A strong capacitive coupling is formed between 12. Wherein, λ is the wavelength of the electromagnetic wave radiated by the antenna array assembly 10 . In other words, the distance between the geometric center of the first radiator 21 and the geometric center of the second radiator 22 is 0.15λ-0.25λ. At this time, a strong capacitive coupling is formed between the first antenna unit 11 and the second antenna unit 12 .

In the conventional technology, generally for a dipole antenna, the element spacing L3 between adjacent antenna elements 1 is greater than or equal to 0.5λ. Because the effective current path length formed by the first radiating arm 211 and the second radiating arm 212 of the dipole antenna is 0.5λ, the impedance of the radiating arm port is matched, the reflection loss is small, and the transmission power of the electromagnetic wave is large. However, in the conventional technology, no strong capacitive coupling is formed between two adjacent antenna units 1, and even in some technologies, an isolation structure is set between adjacent antenna units 1 to reduce the difference between the antenna units 1. coupling between.

The technical personnel of the present application found in the research that setting the element spacing L3 between adjacent antenna elements 1 to be 0.15λ-0.25λ can form strong coupling between adjacent antenna elements 1, compared with the uncoupled antenna elements 1. , the antenna unit 1 that forms strong coupling has a higher bandwidth and a smaller size.

For ease of description, the antenna unit 1 that forms strong capacitive coupling is defined as the strong coupling antenna unit 1 , and the antenna unit 1 that does not form coupling in the conventional technology is defined as the independent antenna unit 1 .

The embodiment of the present application uses a strongly coupled antenna unit 1 as an example for illustration. For example, the distance between the geometric center of the first radiator 21 and the geometric center of the second radiator 22 is 0.2λ. It can be understood that the size of each antenna unit 1 is the same, so the size of the antenna unit 1 is 0.2λ*0.2λ. In this embodiment, the application frequency band of the antenna array assembly 10 is the millimeter wave frequency band. For example, the operating frequency band of the antenna array assembly 10 is 21.4 GHz, which can be obtained according to the size of the antenna unit 1 being 0.2λ*0.2λ, and the size of the antenna unit 1 is 2.8mm*2.8mm. The size of the antenna unit 1 is the size in the Y-Z plane. The distance between the geometric center of the first radiator 21 and the geometric center of the second radiator 22 is 2.8 mm.

Figure 11 is a comparison curve of the reflection coefficient between the 2.8mm*2.8mm strongly coupled antenna unit 1 and the independent antenna unit 1. It can be seen from FIG. 11 that the absolute values of the reflection coefficients of the independent antenna unit 1 are all small, indicating that the return loss of the independent antenna unit 1 is relatively large, and the transmission power of the independent antenna unit 1 is relatively small. The strong coupling antenna unit 1 has a reflection coefficient of less than -6dB in the range of 22.4 to 88.5GHz, a small return loss, a large transmission power, and a relative bandwidth ratio of about 4:1, resulting in a large working bandwidth, which can meet the needs of most millimeter waves. Communication frequency band requirements.

In the 24GHz frequency band, the antenna gain of the strongly coupled antenna unit 1 is 7dBi. In the 42GHz frequency band, the antenna gain of the strongly coupled antenna unit 1 is 11.27dBi. In addition, the strongly coupled antenna unit 1 is concentrated in one axis in both the 24GHz and 42GHz frequency bands. All of the above can show that the strongly coupled antenna unit 1 has better antenna gain and directivity at 24GHz and 42GHz.

The above is an example of the performance results of the strong coupling antenna unit 1 with a size of 2.8mm*2.8mm. Compared with the independent antenna unit 1, the strong coupling antenna unit 1 has a larger bandwidth and can meet most millimeter wave communication frequency bands. requirements. In addition, the strongly coupled antenna unit 1 has high antenna gain and directivity when applied to a common frequency band of the millimeter wave communication frequency band, so the strongly coupled antenna unit 1 provided in this embodiment has high practicability in the millimeter wave communication frequency band .

The specific working principle of the strongly coupled antenna unit 1 is shown in Figure 12: the inductance L1 in Figure 12 can be equivalent to the equivalent inductance of the first radiating arm 211, the coupling between the antenna units 1 can be equivalent to the capacitor C1, the ground plate 4 The coupling effect on the antenna unit 1 can be equivalent to a transmission line with a characteristic impedance of Z0 and a length of H. Z0 is equivalent to the air impedance transmitted in the air, where Z0 is approximately equal to 377ohm.

In this application, the distance between the geometric centers of the two antenna units 1 is designed to be 0.15λ-0.25λ, so that capacitive coupling is formed between the two adjacent antenna units 1, and the capacitive coupling between the antenna units 1 is used to achieve The effect of the inductive reactance of the ground plate 4 on the radiator 2 is cancelled, the impedance matching characteristics of the radiator 2 are improved, the working bandwidth of the antenna unit 1 is widened, and the miniaturization and weight of the antenna unit 1 are also realized. Through the action of equivalent capacitance, the matching impedance performance of the strongly coupled antenna unit 1 in the working frequency band is much better than that of the independent antenna unit 1, so that the strongly coupled antenna unit 1 has a smaller echo in a larger working bandwidth. loss and higher transmission efficiency.

Regarding the size of the strongly coupled antenna unit 1 and the independent antenna unit 1, the size of the independent antenna unit 1 is about 0.5λ*0.5λ, so the size of the strongly coupled unit is 0.15λ*0.15λ to 0.25λ*0.25λ, the strong The area of the coupling unit is 0.09-0.25 times that of the traditional independent antenna unit 1 , so the strong coupling unit provided by the present application greatly reduces the area of the antenna array assembly 10 .

The millimeter-wave array antennas designed and applied to mobile phones in the traditional technology are mostly microstrip antennas, and their operating bandwidths are often narrow and large in size. For the limited space of mobile phones, smaller millimeter-wave modules are undoubtedly the best choice. In addition, millimeter-wave antenna modules that can be applied to wider frequency bands are also a future trend.

Different from avoiding coupling between antennas in the traditional method, the present application makes full use of the capacitive coupling between the antenna units 1, and reduces the distance between the antenna units 1 to obtain a strong coupling capacitance C1 to compensate for the difference between the radiator 2 and the ground plate 4. coupling, so that the antenna unit 1 has a good matching bandwidth. At the same time, the size of the optimized antenna unit 1 is also greatly reduced compared to the size of the antenna unit 1 designed by the traditional method. When the antenna array assembly 10 is applied to the millimeter-wave frequency band, the millimeter-wave antenna array is realized. Ultra-wide working frequency band and miniaturization.

In other words, the present application utilizes the strong capacitive coupling between the antenna elements 1, so that the antenna element 1 of the antenna array assembly 10 not only has a good impedance bandwidth, but also greatly reduces the size of the antenna element 1. Compared with the antenna designed by the traditional method Unit 1, reduced in size to a quarter of its original size. The antenna array assembly 10 designed using this method is very suitable for miniaturized electronic devices 1000 such as mobile phones with very limited space at present.

This application does not specifically limit the structure of the first radiator 21 . The structure of the first radiator 21 is illustrated below with reference to the accompanying drawings, and the structure of the first radiator 21 is exemplified to optimize the antenna. Capacitive coupling between cells 1.

Referring to FIG. 13 , the first radiator 21 includes a first radiating edge 213 close to the second radiator 22 . The second radiator 22 includes a second radiating edge 221 close to the first radiator 21 . The first radiation edge 213 is opposite to and spaced apart from the second radiation edge 221 .

Specifically, the first radiator 21 and the second radiator 22 are the radiators 2 between two adjacent antenna units 1, and the first radiating side 213 and the second radiating side 221 are arranged opposite to each other, so that the first radiator 21 and the second radiator 22 are at least partially opposite, increasing the facing area of the first radiator 21 and the second radiator 22 in the first direction, and promoting the formation of capacitance between the first radiator 21 and the second radiator 22 Coupling and increasing the capacitive coupling strength between the first radiator 21 and the second radiator 22 .

It can be understood that by increasing the facing area of the first radiator 21 and the second radiator 22 in the first direction, the coupling strength between the first radiator 21 and the second radiator 22 is increased, and then the first radiator 21 and the second radiator 22 are flexibly adjusted. The distance between the radiator 21 and the second radiator 22 makes the shape design of the first radiation arm 211 more flexible.

In this embodiment, please refer to FIG. 13 , the first radiator 21 and the second radiator 22 are both symmetrical dipole radiators 2 . The first radiator 21 includes a first radiation arm 211 and a second radiation arm 212 . The second radiator 22 includes a fifth radiation arm 222 and a sixth radiation arm 223 (the third and fourth radiation arms will be described later). The second radiation arm 212 , the first radiation arm 211 , the fifth radiation arm 222 and the sixth radiation arm 223 are sequentially arranged along the positive Y axis. The symmetry axes of the first radiation arm 211 and the second radiation arm 212 extend along the Z-axis direction, and the symmetry axes of the fifth radiation arm 222 and the sixth radiation arm 223 extend along the Z-axis direction. The first radiation arm 211 is the side of the first radiation arm 211 close to the fifth radiation arm 222 , and the second radiation side 221 is the side of the fifth radiation arm 222 facing the first radiation arm 211 .

The first radiating arm 211 and the fifth radiating arm 222 are symmetrically arranged, and the extending direction of the symmetry axis thereof is the Z-axis direction.

Further, the first radiation edge 213 intersects or is perpendicular to the first direction, and the second radiation edge 221 intersects or is perpendicular to the first direction.

In this embodiment, the first radiation edge 213 and the second radiation edge 221 can both intersect the first direction, and the first radiation edge 213 and the second radiation edge 221 are parallel, so that the first radiation edge 213 and the second radiation edge are 221 forms an insulating gap with uniform spacing, so as to make a stable coupling capacitance structure between the first radiation arm 211 and the fifth radiation arm 222 .

Further, the first radiation edge 213 is perpendicular to the first direction, and the second radiation edge 221 is perpendicular to the first direction. Since the first direction is the current path direction of the current in the first radiation arm 211 , by setting the first radiation side 213 and the second radiation side 221 to be perpendicular to the first direction, a coupling capacitance is formed in the current flow direction, and the first radiation side 213 and the second radiation side 221 are set to be perpendicular to the first direction. The coupling efficiency between the radiation arm 211 and the second radiation arm 212 also improves the coupling efficiency between the first antenna unit 11 and the second antenna unit 12 .

Of course, in other embodiments, the first radiator 21 and the second radiator 22 may also be a whole patch antenna, the first radiating side 213 is the side of the first radiator 21 facing the second radiator 22, the second The radiation side 221 is the side of the second radiator 22 facing the first radiator 21 .

The specific shapes of the first radiation arm 211 and the second radiation arm 212 are not specifically limited in the present application, and the specific shapes of the first radiation arm 211 and the second radiation arm 212 are exemplified below with reference to the accompanying drawings.

In this embodiment, in the direction in which the first radiator 21 points to the second radiator 22 (which is also the direction in which the geometric center of the first radiator 21 points to the edge of the first radiator 21 ), the first radiating arm 211 extends along the second The length dimension in the direction gradually increases, and the second direction is a direction perpendicular to the first direction in the plane where the first radiator 21 is located. The direction in which the first radiator 21 points to the second radiator 22 is also the flow direction of the current on the first radiator arm 211 .

By designing in the direction of the current flow of the first radiation arm 211, the width of the first radiation arm 211 (the width direction is the second direction) gradually increases in size, so that the impedance of the first radiation arm 211 is gradually reduced, thereby realizing the first The radiation arm 211 better matches the transmitted current signal in the millimeter-wave frequency band, reduces the signal loss of the millimeter-wave signal, and improves the transmission efficiency of the millimeter-wave signal; moreover, the width of the first radiation arm 211 gradually increases, which can make The size of the first radiating edge 213 is relatively large. Since the fifth radiating arm 222 and the first radiating arm 211 are symmetrical in shape, the size of the second radiating edge 221 is relatively large. The opposite area of the capacitive coupling is increased, which is beneficial to improve the capacitive coupling strength between two adjacent antenna units 1 .

Specifically, the shape of the first radiation arm 211 includes, but is not limited to, a trapezoid, a triangular layer, a semicircle, and the like inclined at 90° in the counterclockwise direction. In this embodiment, the shape of the first radiation arm 211 is an isosceles trapezoid inclined by 90° in the counterclockwise direction.

In one embodiment, the second radiation arm 212 and the first radiation arm 211 are arranged symmetrically about the first symmetry axis L1. Those skilled in the art can deduce the structure of the second radiation arm 212 according to the structure of the first radiation arm 211. Therefore, The structure of the second radiation arm 212 is not repeated here.

The specific implementation manners for enhancing the capacitive coupling between two adjacent antenna units 1 provided by the embodiments of the present application include but are not limited to the following embodiments.

In a first possible embodiment, please refer to FIG. 14 , the first radiator 21 further includes a first extension plate 215 . The first extension plate 215 is connected to the first radiating edge 213 . The first extension plate 215 intersects or is perpendicular to the plane where the first radiator 21 is located. The second radiator 22 also includes a second extension plate 225 . The second extension plate 225 is connected to the second radiating edge 221 . The second extension plate 225 intersects or is perpendicular to the plane where the second radiator 22 is located. The second extension plate 225 is disposed opposite to the first extension plate 215 .

In this embodiment, the first extension plate 215 is perpendicular to the plane where the first radiator 21 is located, and is connected to the first radiating edge 213 . Optionally, the normal direction of the first extension plate 215 is the first direction (Y-axis direction). In this embodiment, the first extension plate 215 is bent and extended from the first radiating edge 213 toward the dielectric plate 3 . The first extension plate 215 can be embedded in the dielectric plate 3 or penetrate through the dielectric plate 3 . In this way, the first extension plate 215 can be extended. The plate 215 extends toward the inside of the antenna unit 1 without increasing the size of the antenna unit 1 . In other embodiments, the first extension plate 215 may also extend from the first radiation edge 213 away from the direction in which the dielectric plate 3 is located.

Further, the normal direction of the second extension plate 225 is the first direction (Y-axis direction). In this embodiment, the second extension plate 225 is bent and extended from the second radiating edge 221 toward the dielectric plate 3 . The second extension plate 225 can be embedded in the dielectric plate 3 or penetrate through the dielectric plate 3 , so that the second extension plate 225 extends The plate 225 extends inward toward the inner side of the antenna unit 1 without increasing the size of the antenna unit 1 . The second extension plate 225 is disposed opposite to the first extension plate 215, so as to increase the facing area of capacitive coupling between two adjacent antenna units 1, improve the capacitive coupling strength between the antenna units 1, and achieve the target capacitance when required. Under the coupling strength, the area facing the capacitive coupling between the first radiating edge 213 and the second radiating edge 221 increases, so that the distance between the first radiating edge 213 and the second radiating edge 221 can be flexibly adjusted. The shapes of the first radiation arm 211 and the second radiation arm 212 are not limited and can be designed flexibly.

It can be understood that both the first extension plate 215 and the second extension plate 225 are made of conductive material, and the material of the first extension plate 215 and the second extension plate 225 can be the same as the material of the first radiation arm 211 and the second radiation arm 212 .

In this embodiment, the first extension plate 215 is a flat straight plate. In other embodiments, the first extension plate 215 may also be a bent plate. The orthographic projection of the first extension plate 215 in the X-Y plane is L-shaped, "bow"-shaped, or the like. Correspondingly, the second extension plate 225 is bent and extended. When the thickness of the dielectric plate 3 is reduced, the lengths of the first extension plate 215 and the second extension plate 225 along the Z-axis direction are limited. The first extension plate 215 is bent and extended together, which can effectively increase the facing area of the first extension plate 215 and the second extension plate 225, improve the capacitive coupling effect of the two adjacent antenna units 1, and at the same time, can not affect the antenna. The overall size of the unit 1 facilitates miniaturization of the antenna unit 1 .

In this embodiment, a first extension plate 215 is provided for the first radiation arm 211, and a second extension plate 225 is provided for the fifth radiation arm 222 to increase the capacitive coupling effect of two adjacent antenna units 1. The other opposite and mutually coupled radiation arms An extension plate may also be provided to increase the mutual coupling strength, which will not be described in detail in this application.

Optionally, the length of the first extension plate 215 in the Z-axis direction is the same as the length of the first radiating edge 213 in the Z-axis direction. The length of the second extending plate 225 in the Z-axis direction is the same as the length of the second radiating edge 221 in the Z-axis direction. Of course, in other embodiments, the length of the first extension plate 215 in the Z-axis direction is greater than the length of the first radiating edge 213 in the Z-axis direction.

In a second possible embodiment, please refer to FIG. 15 , the antenna array assembly 10 further includes at least one coupling member 7 disposed between the first radiating edge 213 and the second radiating edge 221 . The coupling element 7 forms capacitive coupling with the first radiator 21 and the second radiator 22 .

In this embodiment, the material of the coupling member 7 is a conductive material. The coupling member 7 includes, but is not limited to, a conductive strip, a conductive plate, and the like. The material of the coupling member 7 may be the same as that of the first radiator 21 and the second radiator 22 . In this embodiment, the coupling member 7 is a conductive strip, and the coupling member 7 and the first radiating edge 213 are arranged in parallel and opposite to each other. The coupling member 7 may be located in the middle position between the first radiation edge 213 and the second radiation edge 221 , so that the two sides form a symmetrical coupling structure. One side of the coupling member 7 forms capacitive coupling with the first radiating side 213, and the other side of the coupling member 7 forms capacitive coupling with the second radiating side 221, so that the first radiating side 213 and the second radiating side 221 form a capacitive coupling even when the distance between the first radiating side 213 and the second radiating side 221 is relatively large. Mutual coupling can also be achieved when the distance is large. In other words, the coupling member 7 can make it easier for the two adjacent antenna elements 1 to couple with each other. Moreover, between the first radiation edge 213 and the coupling member 7, and between the coupling member 7 and the second radiation Small-spacing capacitive coupling is formed between the sides 221 , which can enhance the coupling effect between two adjacent antenna units 1 .

Optionally, the orthographic projection of the coupling member 7 in the first direction covers the orthographic projection of the first radiator 21 in the first direction, so as to increase the facing area of the coupling member 7 and the first radiator 21 and improve the adjacent Coupling effect between two antenna elements 1 . The orthographic projection of the coupling member 7 in the first direction covers the orthographic projection of the second radiator 22 in the first direction, so as to increase the facing area of the coupling member 7 and the second radiator 22 and improve the two adjacent antenna units. 1 coupling effect.

With reference to the first possible implementation manner, please refer to FIG. 16 , the coupling member 7 is a conductive plate, and the normal direction of the coupling member 7 may be the first direction. The coupling member 7 is located between the first extension plate 215 and the second extension plate 225 , and the coupling member 7 is disposed opposite to the first extension plate 215 and the second extension plate 225 , so that the coupling member 7 and the first extension plate 215 are arranged opposite to each other. The opposite area of the capacitive coupling of the antenna is larger, and the opposite area of the capacitive coupling between the coupling member 7 and the second extension plate 225 is also larger, which improves the coupling effect between the two adjacent antenna units 1 .

Further, please refer to FIG. 17 , the coupling member 7 can be bent along with the first extension plate 215 and the second extension plate 225 to improve the capacitive coupling effect of the two adjacent antenna units 1 , and at the same time, it can also not affect the antenna unit 1 The overall size of the antenna unit 1 promotes miniaturization.

For the antenna unit 1 located at the edge, since the antenna unit 1 at the edge cannot form capacitive coupling with the adjacent antenna unit 1, the inductive influence of the ground plate 4 on the radiator 2 cannot be canceled. The embodiments of the present application provide the following implementation manners to offset at least part of the inductive reactance of the ground plate 4 at the antenna unit 1 at the edge. The design of the edge radiator 2 in the present application includes but is not limited to the following embodiments.

Referring to FIG. 18 , the third antenna unit 13 and the fourth antenna unit 14 are the antenna units 1 at opposite ends of the antenna array assembly 10 , respectively. The third antenna unit 13 includes a third radiator 23 . The side of the third radiator 23 away from the fourth radiator 2 is provided with a first expansion portion 131 . The fourth antenna unit 14 includes a fourth radiator 24 . The side of the fourth radiator 24 away from the third radiator 23 is provided with a second expansion portion 141. Both the first extension portion 131 and the second extension portion 141 are made of conductive material.

In a possible implementation manner, the first extension portion 131 is a parasitic branch of the third radiator 23 , so that the third antenna unit 13 also has good impedance characteristics. The second extension portion 141 is a parasitic branch of the fourth radiator 24 so that the fourth antenna unit 14 also has good impedance characteristics.

Optionally, the first extension portion 131 is disposed coplanar with the third radiator 23 or disposed intersecting with the third radiator 23 . The second extension portion 141 is disposed coplanar with the fourth radiator 24 or disposed intersecting with the fourth radiator 24 .

Referring to FIG. 18 , the edge of the third radiator 23 away from the fourth radiator 24 is the third radiating edge 231 , and the first extension portion 131 is connected to the third radiating edge 231 . The length dimension of the first extension part 131 in the first direction is 0.075λ˜0.125λ, so as to cancel the inductive reactance of the ground plate 4 to the edge radiator 2 , improve the impedance matching characteristics of the antenna unit 1 and widen the antenna unit 1 . working bandwidth. For example, when the unit spacing L3 between two adjacent antenna units 1 is 0.2λ, the length dimension of the first extension portion 131 in the first direction is 0.1λ, so as to cancel the induction of the ground plate 4 to the edge radiator 2 Inductive resistance.

Referring to FIG. 18 , the edge of the fourth radiator 24 away from the third radiator 23 is the fourth radiating edge 241 , and the second extending portion 141 is connected to the fourth radiating edge 241 . The length dimension of the second extension portion 141 in the first direction is 0.075λ˜0.125λ, so as to cancel the inductive reactance of the ground plate 4 to the edge radiator 2 , improve the impedance matching characteristics of the antenna unit 1 and widen the working bandwidth. For example, when the unit spacing L3 between two adjacent antenna units 1 is 0.2λ, the length dimension of the first extension portion 131 in the first direction is 0.1λ, so as to cancel the induction of the ground plate 4 to the edge radiator 2 Inductive resistance.

In this embodiment, the first extension portion 131 and the third radiator 23 are disposed coplanarly. The material of the first extension portion 131 is the same as that of the third radiator 23 , and the first extension portion 131 and the third radiator 23 can be fabricated in the same process, so as to simplify the fabrication steps of the antenna unit 1 . The second extension portion 141 is coplanar with the fourth radiator 24 . The material of the second extension portion 141 is the same as that of the fourth radiator 24 , and the second extension portion 141 and the fourth radiator 24 can be fabricated in the same process, so as to simplify the fabrication steps of the antenna unit 1 .

Optionally, the size of the first extension portion 131 in the second direction is the same as the size of the third radiator 23 in the second direction, so as to achieve impedance matching of the third antenna unit 13 . The size of the second extension portion 141 in the second direction is the same as the size of the fourth radiator 24 in the second direction, so as to achieve impedance matching of the fourth antenna unit 14 .

Referring to FIG. 19 , at least part of the first extension portion 131 intersects or is perpendicular to the plane where the third radiator 23 is located. Specifically, the first extension portion 131 is bent toward the dielectric plate 3 , and the normal direction of the first extension portion 131 is the first direction, so as to reduce the area occupied by the first extension portion 131 in the Z-Y plane and facilitate the antenna array assembly 10 of miniaturization. At least a portion of the second expansion portion 141 intersects or is perpendicular to the plane where the fourth radiator 24 is located. Specifically, the second extension portion 141 is bent toward the dielectric plate 3 , and the normal direction of the second extension portion 141 is the first direction, so as to reduce the area occupied by the second extension portion 141 in the Z-Y plane and facilitate the antenna array assembly 10 of miniaturization.

Optionally, at least one of the first extension portion 131 and the second extension portion 141 is a bent plate. The cross-section of the first extension portion 131 can be bent in an L-shape and an arc-shape. The cross-section of the second extension portion 141 can be bent in an L-shape and an arch-shape. In this way, the first extension portion 131 and the second extension portion 141 can be arranged in the dielectric plate 3 with a smaller thickness, thereby reducing the overall volume of the antenna unit 1 .

In another possible implementation, for a schematic structural diagram of this implementation, please refer to FIG. 19 , the first extension 131 is perpendicular to the plane where the third radiator 23 is located, and the first extension 131 is grounded, and the first extension 131 may be A mirror surface is formed to mirror the impedance of the radiation arm connected to the first extension part 131 to the other side of the first extension part 131 , so as to cancel the influence of the inductive reactance of the ground plate 4 on the third radiator 23 . In this embodiment, there is no need to provide parasitic branches on the surface where the third radiator 23 is located, so that the area occupied by the antenna array assembly 10 can be reduced. Correspondingly, the second extension portion 141 is perpendicular to the plane where the fourth radiator 24 is located, and the second extension portion 141 is grounded. The mirror image is mirrored to the other side of the second extension portion 141 , so as to cancel the influence of the inductive reactance of the ground plate 4 on the fourth radiator 24 . In this embodiment, there is no need to provide parasitic branches on the surface where the fourth radiator 24 is located, so that the area occupied by the antenna array assembly 10 can be reduced.

Further, the first extension portion 131 and the second extension portion 141 are both conductive ground plates 4 . In a possible implementation manner, the first extension part 131 and the second extension part 141 may be extension pieces of the metal ground of the middle frame 503 . In other words, the middle frame 503 is formed with two oppositely arranged extension pieces, the antenna array assembly 10 is respectively disposed between the two oppositely arranged extension pieces, and the two oppositely arranged extension pieces are respectively electrically connected to the two ends of the antenna array component 10. Radiator 2. In this way, the multiplexing of the metal ground of the middle frame 503 is realized, so as to reduce or offset the influence of the ground plate 4 on the edge radiator 2. At the same time, the metal ground of the middle frame 503 can also be used as a fixing structure of the antenna array assembly 10, realizing a Multipurpose.

In a possible implementation manner, please refer to FIG. 20 , a plurality of antenna units 1 are arranged in a multi-row and multi-column direction, the row direction is the first direction, and the column direction is the second direction. For example, the antenna array assembly 10 includes a plurality of rows of antenna units 1 , and each row of the antenna units 1 includes a third antenna unit 13 , a fifth antenna unit 15 , a first antenna unit 11 , and a second antenna unit arranged in sequence along the first direction. 12. The sixth antenna unit 16 and the fourth antenna unit 14. Since each antenna element 1 has the same size in the row direction and the column direction. Therefore, in the column direction, the element spacing L3 between adjacent antenna elements 1 is also 0.15λ-0.25λ. Therefore, in the column direction, capacitive coupling can also be formed between adjacent antenna elements 1 . In this way, for the two-dimensional antenna array assembly 10, the inductive reactance effect of the ground plate 4 on the radiator 2 can be canceled in both the row and column directions, thereby increasing the bandwidth of the antenna unit 1 and reducing the size of the sweet spot unit.

Further, please refer to FIG. 21 , the radiator 2 can be an orthogonal crossed dipole to realize a dual-polarized antenna and improve the signal coverage of the antenna unit 1 . Specifically, for the first antenna unit 11, the first radiator 21 further includes a third radiating arm 216 and a fourth radiating arm 217 that are symmetrical about the second axis of symmetry L2 and are spaced apart. The extending direction of the second symmetry axis L2 is parallel to the first direction. Each radiating arm has the same shape. In the column direction, capacitive coupling is formed between the radiation arms of two adjacent antenna units 1, so as to reduce the influence of the inductive reactance of the column direction ground plate 4 on the third radiation arm 216, improve the bandwidth of the antenna unit 1 and reduce the The size of the dessert unit. The form of capacitive coupling formed between the radiation arms of the two adjacent antenna units 1 in the column direction is the same as the form of capacitive coupling formed between the radiation arms of the two adjacent antenna units 1 in the row direction. Repeat. Similarly, in the column direction, the radiating arm located at the edge can also be provided with an edge plate to cancel the influence of the inductive reactance of the ground plate 4 on the radiating arm and improve the impedance matching of the antenna unit 1 .

The second embodiment of the present application provides an antenna array assembly 10. The antenna array assembly 10 includes a plurality of antenna units 1 spaced along a first direction. The antenna unit 1 includes a radiator 2 and a ground plate 4 . Coupling capacitance and capacitive reactance are formed between the edges of the radiators 2 of at least two adjacent antenna units 1 . A coupled inductance and inductive reactance are formed between the ground plate 4 and the radiator 2 . The capacitive reactance of the coupling capacitor cancels at least part of the inductive reactance of the coupling inductor. In any two adjacent antenna units 1, the distance between the geometric centers of the radiators 2 belonging to the two antenna units 1 is 0.15λ-0.25λ. in. λ is the wavelength of the electromagnetic wave radiated by the antenna array assembly 10 .

In this application, the distance between the geometric centers of the radiators 2 of any two adjacent antenna units 1 is designed to be 0.15λ-0.25λ, so that capacitive coupling is formed between the two adjacent antenna units 1, and the use of The capacitive coupling between the antenna units 1 can cancel the inductive reactance of the ground plate 4 to the radiator 2, improve the impedance matching characteristics of the radiator 2, broaden the working bandwidth of the antenna unit 1, and realize the miniaturization of the antenna unit 1. , lightweight.

For the structure of the antenna array assembly 10 in this embodiment, reference may be made to the specific structure of the antenna array assembly 10 provided in Embodiment 1, which is not repeated in this embodiment.

The above are some embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also regarded as the present invention. The scope of protection applied for.

Claims

An antenna array assembly, characterized in that it comprises a plurality of antenna units spaced along a first direction, and in any two adjacent antenna units, the geometric centers of the radiators belonging to the two antenna units respectively belong to the geometric centers of the radiators. The distance between them is 0.15λ-0.25λ, where λ is the wavelength of the electromagnetic wave radiated by the antenna array assembly.
The antenna array assembly according to claim 1, wherein the plurality of antenna elements comprises a first antenna element and a second antenna element arranged adjacently, the first antenna element comprises a first radiator, and the The second antenna unit includes a second radiator, the first radiator includes a first radiating edge close to the second radiator, the second radiator includes a second radiating edge close to the first radiator, The first radiating edge is opposite to the second radiating edge.
The antenna array assembly according to claim 2, wherein the first radiation edge intersects or is perpendicular to the first direction, and the second radiation edge intersects or is perpendicular to the first direction.
The antenna array assembly of claim 2, wherein the first radiator further comprises a first extension plate, the first extension plate is connected to the first radiating edge, and the first extension plate is connected to the first extension plate. The plane where the first radiator is located intersects or is perpendicular; the second radiator further includes a second extension plate, the second extension plate is connected to the second radiating edge, and the second extension plate is connected to the second radiator. The plane where the body is located intersects or is perpendicular, and the second extension plate is arranged opposite to the first extension plate.
The antenna array assembly according to claim 2, wherein the antenna array assembly further comprises at least one coupling member disposed between the first radiating side and the second radiating side, the coupling member being connected to the The first radiator and the second radiator both form capacitive coupling.
6. The antenna array assembly according to claim 5, wherein the material of the coupling member is a conductive material, and the orthographic projection of the coupling member in the first direction covers the first radiator in the first direction. an orthographic projection in one direction; the orthographic projection of the coupling member in the first direction covers the orthographic projection of the second radiator in the first direction.
The antenna array assembly of claim 2, wherein the plurality of antenna elements comprises a third antenna element and a fourth antenna element located at opposite ends, the third antenna element comprises a third radiator, and the The fourth antenna unit includes a fourth radiator; a side of the third radiator away from the fourth radiator is provided with a first extension; and/or the fourth radiator is away from the third radiator One side is provided with a second expansion part.
The antenna array assembly according to claim 7, wherein a length dimension of the first extension portion in the first direction is 0.075λ˜0.125λ.
The antenna array assembly of claim 8, wherein the first extension part and the third radiator are coplanar; or, at least part of the first extension part and the third radiator The planes are intersecting or perpendicular.
The antenna array assembly of claim 7, wherein the first extension part is perpendicular to a plane where the third radiator is located, and the first extension part is grounded.
The antenna array assembly according to any one of claims 1 to 10, wherein the size of the antenna unit along the first direction is 0.15λ-0.25λ, and the size of the antenna unit along the second direction is 0.15λ-0.25λ, the second direction is a direction perpendicular to the first direction in the plane where the radiator is located.
The antenna array assembly according to any one of claims 1 to 10, wherein the antenna unit receives and transmits electromagnetic wave signals including at least one of millimeter waves, submillimeter waves, and terahertz waves.
The antenna array assembly according to any one of claims 1 to 10, wherein the radiator comprises a first radiating arm and a second radiating arm that are symmetrical about a first axis of symmetry and are spaced apart, and the first symmetrical The extending direction of the shaft is perpendicular to the first direction.
The antenna array assembly according to claim 13, wherein, from the geometric center of the radiator to the edge of the radiator, the length dimension of the first radiating arm along the second direction gradually increases, The second direction is a direction perpendicular to the first direction in the plane where the radiator is located.
The antenna array assembly according to claim 13, wherein the antenna unit further comprises a dielectric plate, a ground plate, a first feeding column, a second feeding column and a feeding source, and the radiator is arranged on the On the dielectric plate, the grounding plate is disposed opposite to the side of the dielectric plate facing away from the radiator, the first feeding column and the second feeding column are spaced apart, and the first feeding column is One end is electrically connected to the first radiation arm, one end of the second feed post is electrically connected to the second radiation arm, and the feed source is electrically connected to the other end of the first feed post and the second feed post the other end of the pole.
The antenna array assembly according to claim 13, wherein a plurality of the antenna elements are arranged in an array, and the distance between the geometric centers of the radiators of the two antenna elements arranged adjacently along the second direction is 0.15λ-0.25λ, the second direction is perpendicular to the first direction in the plane where the radiator is located.
The antenna array assembly of claim 16, wherein the radiator further comprises a third radiating arm and a fourth radiating arm that are symmetrical and spaced about a second axis of symmetry, and the extension direction of the second axis of symmetry parallel to the first direction.
An antenna array assembly, characterized in that it includes a plurality of antenna units spaced along a first direction, the antenna units include a radiator and a ground plate, and at least two adjacent radiators of the antenna units are formed between the radiators A coupling capacitor generates a capacitive reactance, a coupling inductance is formed between the ground plate and the radiator and an inductive reactance is generated, and the capacitive reactance of the coupling capacitor cancels at least part of the inductive reactance of the coupling inductance.
The antenna array assembly according to claim 18, wherein, in any two adjacent antenna units, the distance between the geometric centers of the radiators belonging to the two antenna units is 0.15λ- 0.25λ, where λ is the wavelength of the electromagnetic wave radiated by the antenna array assembly.
An electronic device, characterized by comprising the antenna array assembly according to any one of claims 1 to 19.
The electronic device according to claim 20, wherein the electronic device comprises a display screen, a frame and a back cover, the display screen and the back cover are respectively covered and connected to opposite sides of the frame, To form a receiving space, the antenna array assembly is arranged in the receiving space; or, the antenna array assembly is arranged on the surface of the frame; or, the frame of the antenna array assembly is provided with an opening, and the antenna The array assembly is at least partially disposed in the opening.