Radiating unit, antenna array, antenna device and base station

Abstract

The embodiment of the present application provides a radiation unit, an antenna array, an antenna device and a base station, wherein the radiation unit includes: a dielectric plate, the dielectric plate is provided with at least a first surface and a cavity; a radiation sheet, the radiation sheet is provided on the first surface of the dielectric plate; a first feeding post, coupled with the radiation sheet and provided in the cavity of the dielectric plate; a second feeding post, coupled with the radiation sheet and provided in the cavity of the dielectric plate, the second feeding post and the first feeding post being orthogonally symmetrically provided. The embodiment of the present application provides a cavity in the dielectric plate and a feeding structure in the cavity, which simplifies the processing technology of the radiation unit and improves the performance parameters of the antenna.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a radiation unit, an antenna array, an antenna device and a base station. Background Art

[0002] With the continuous advancement of communication technology, new generation mobile communication technology (such as 5G) is gradually becoming popular. Since the antennas of the new generation mobile communication technology adopt Massive Multiple in Multiple out (Massive MIMO) technology, the requirements for antennas are getting higher and higher. Since the antenna needs to send and receive signals in different frequency bands, the cross-polarization discrimination rate is an important indicator to measure the performance of the antenna.

[0003] At present, microstrip patch antennas are used as radiation units in related technologies. Microstrip patch antennas have a high cross-polarization level, which makes the signal easy to fade in a complex environment, which will reduce the communication quality. In order to reduce the cross-polarization level of the microstrip patch antenna, the multi-layer dielectric board is laminated in the form of slot coupling, which has a high processing difficulty. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The embodiments of the present application provide a radiating unit, an antenna array, an electronic device and a base station, which use a first feeding pole and a second feeding pole that are orthogonally symmetrically arranged to achieve two polarization coupled feeding, have gain for signals within the working frequency band of the radiating unit, reduce the cross-polarization level of the radiating unit, and improve the cross-polarization discrimination rate of the radiating unit.

[0006] According to a first aspect of an embodiment of the present application, a radiation unit is provided, comprising: a dielectric plate, the dielectric plate being provided with at least a first surface and a cavity; a radiation plate, the radiation plate being arranged on the first surface of the dielectric plate; a first feeding post, coupled to the radiation plate and arranged in the cavity of the dielectric plate; a second feeding post, coupled to the radiation plate and arranged in the cavity of the dielectric plate, the second feeding post being arranged orthogonally symmetrically to the first feeding post.

[0007] According to a second aspect of an embodiment of the present application, an antenna array is provided, characterized in that it includes: at least two radiating units as described in the first aspect.

[0008] According to a third aspect of an embodiment of the present application, an antenna device is provided, characterized in that it includes: at least one antenna array as described in the second aspect.

[0009] According to a fourth aspect of an embodiment of the present application, a base station is provided, characterized in that it includes: at least one antenna array as described in the second aspect.

[0010] In the embodiment of the present application, a cavity is arranged in the dielectric plate of the radiation unit, an orthogonal symmetrical feeding post structure is arranged in the cavity, and the performance parameters of the antenna are improved.

[0011] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a top view of a radiation unit according to an embodiment of the present application;

[0013] Figure 2 is a bottom view of a radiation unit according to an embodiment of the present application;

[0014] Figure 3 is a bottom view of a radiation unit according to another embodiment of the present application;

[0015] Figure 4 is a top view of an antenna array according to an embodiment of the present application;

[0016] Figure 5 is a bottom view of an antenna array according to an embodiment of the present application;

[0017] Figure 6 is a stereogram of an antenna array according to an embodiment of the present application;

[0018] Figure 7 is a stereoscopic diagram of an antenna array according to an embodiment of the present application.

[0019] Reference numerals:

[0020] Radiating unit 100; first radiating unit 101; second radiating unit 102; third radiating unit 103; fourth radiating unit 104; fifth radiating unit 105; sixth radiating unit 106; dielectric plate 110; radiating plate 120; matching branch 130; first feeding column 141; second feeding column 142; limiting column 150; first centimeter feeding line 161; second centimeter feeding line 162; third centimeter feeding line 163; fourth centimeter feeding line 164; first feeding needle 171; second feeding needle 172; third feeding needle 173; fourth feeding needle 174; metal hole 180. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0022] The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific sequence or order.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] With the development of communication technology, the technical indicators of antennas are required to be higher and higher. Antennas in related technologies are often installed by welding traditional oscillators and power splitter networks, and laminating multi-layer dielectric plates 110 in the form of slot coupling, which is difficult to process.

[0025] The vibrator is the most important functional component inside the antenna. The traditional vibrator structure is complex in design, large in size, heavy in weight, has many processing steps and high production cost. Cross-polarization discrimination is an important indicator for measuring the performance of base station antennas. In mobile communication systems, polarization diversity technology of dual-polarized antennas is usually used to overcome signal fading in complex environments and improve communication quality. Antennas with good cross-polarization discrimination have good orthogonal polarization characteristics, that is, within the ±60° sector service area, the level represented by the cross-polarization pattern should be significantly lower than the level represented by the main polarization direction at the corresponding angle. Obviously, the greater the cross-polarization discrimination, the smaller the correlation between the two signals, and the better the classification effect. In order to meet the requirements of low profile of the new generation of mobile communication base stations and realize planar antenna arrays, microstrip patch antennas are usually selected as radiating units 100. However, one defect of the microstrip patch antenna array is that it has a high cross-polarization level, which limits its application in scenarios with strict cross-polarization requirements. In order to reduce the cross-polarization level, a slot-coupled patch antenna can be used, but this method requires lamination of multiple dielectric plates 110, which increases the difficulty of processing and the cost. In addition, the electric dipole of the related art is large in size and the conventional patch has a poor cross-polarization ratio.

[0026] Based on this, the embodiment of the present application provides a radiation unit 100. For example, in some embodiments, the radiation unit 100 adopts a P-type coupled feeding structure, and optimizes and adjusts the P-type aperture size to achieve the purpose of increasing the antenna bandwidth; a rectangular matching branch 130 is loaded around the dipole unit radiation plate 120 to increase the resonant frequency point of the antenna and change the path of the surface current of the antenna radiation plate 120, so that the cross-polarization level of the antenna in the wide frequency band is reduced as a whole, while the antenna is miniaturized;

[0027] In other embodiments, the present invention is based on plastic injection molding, laser engraving, and electrochemical plating technology, and multiple antenna units, plastic substrates, and power division feeding networks are integrally formed, replacing the traditional welding method of vibrators and centimeter networks, reducing the number of parts and components, and reducing the overall weight of the antenna, thereby achieving lightweight and integrated antennas.

[0028] In a first aspect, an embodiment of the present application provides a radiation unit 100, referring to Figure 1 and Figure 2 The radiation unit 100 includes: a dielectric plate 110, the dielectric plate 110 is at least provided with a first surface and a cavity; a radiation plate 120, the radiation plate 120 is arranged on the first surface of the dielectric plate 110; a first feeding column 141, coupled to the radiation plate 120, and arranged in the cavity of the dielectric plate 110; a second feeding column 142, coupled to the radiation plate 120, and arranged in the cavity of the dielectric plate 110, and the second feeding column 142 is orthogonally symmetrically arranged with the first feeding column 141.

[0029] In some embodiments, the radiation unit 100 includes at least the following parts: a dielectric plate 110 , a radiation plate 120 , a first feeding post 141 , and a second feeding post 142 .

[0030] In some embodiments, the radiation sheet 120 is disposed above the dielectric plate 110. A square cavity is disposed in the dielectric plate 110, and the first feeding post 141 and the second feeding post 142 are disposed inside the dielectric plate 110, and the intersection of the extension line of the center of the first feeding post 141 and the extension line of the center of the second feeding post 142 is at a ninety-degree angle. The first feeding post 141 and the second feeding post 142 form two polarization coupling feeds of ±45 degrees for the radiation sheet 120.

[0031] In some embodiments, a cavity is provided in the dielectric plate 110 , and an orthogonal symmetrical feeding post structure is provided in the cavity, thereby improving the performance parameters of the antenna.

[0032] In some embodiments, the first feeding post 141 is used to transmit a radiation signal in a first polarization direction. The second feeding post 142 is used to transmit a radiation signal in a second polarization direction. The orthogonal symmetric arrangement of the first feeding post 141 and the second feeding post 142 can provide vertical polarization coupling feeding to the radiation plate 120.

[0033] In some embodiments, the cavity is a square cavity; the first feeding column 141 extends from the first top corner of the cavity towards the center of the cavity, and the second feeding column 142 extends from the second top corner of the cavity towards the center of the cavity, such that the first feeding column 141 and the second feeding column 142 are orthogonally symmetrically arranged.

[0034] In some embodiments, setting the cavity as a square cavity can reduce the processes in manufacturing the dielectric substrate 110 and improve the production efficiency.

[0035] In some embodiments, the first feeding column 141 and the second feeding column 142 are arranged to apply the same structure and material, and the extension lines of the centerlines of the first feeding column 141 and the second feeding column 142 intersect at a 90-degree angle.

[0036] In some embodiments, the shape of the first feeding column 141 is a "dry" shape, a P shape, a Y shape, etc.; the shape of the second feeding column 142 is a "dry" shape, a P shape, a Y shape, etc.

[0037] In some embodiments, the first feeding column 141 and the second feeding column 142 are arranged to have the same shape, which can enable the radio frequency unit to obtain a stable current during feeding and improve the stability of the radiation unit 100 during operation.

[0038] In some embodiments, when the shape of the feeding column is a P shape, as Figure 2 shown, the feeding column has a columnar connecting column, and one end of the connecting column is connected to the edge of the cavity of the radiation unit 100. The feeding column also has a closed structure away from the edge of the cavity of the radiation unit 100. The closed structure has an inner diameter and an outer diameter. Applying a P-shaped feeding column can improve the cross-polarization level and reduce the mutual coupling between different polarizations of the antenna. By adjusting the inner diameter, outer diameter, and height of the P shape, the adjustment of the antenna reception bandwidth can be achieved. Setting a P-shaped feeding column can reduce the mutual coupling between the two polarizations of the antenna.

[0039] In some embodiments, Figure 3 is the bottom view of the radiation unit provided by another embodiment of the present application. As Figure 3 shown, the shapes of both the first feeding column 141 and the second feeding column 142 are "dry" shapes.

[0040] In some embodiments, when the shape of the feeding column is set as a "dry" shape or a Y shape, as Figure 3 shown, the feeding column has a columnar connecting column, and the connecting column is connected to the edge of the cavity of the radiation unit 100. The feeding column has a "dry" shape structure away from the edge of the cavity of the radiation unit 100. Setting the shape of the feeding column as a "dry" shape or a Y shape can be set for different antennas to reduce the mutual coupling between the two polarizations of the antenna.

[0041] In some embodiments, the radiation unit 100 further includes: a matching branch 130 , which is disposed on the first surface of the dielectric plate 110 , and the matching branch 130 is a structure extending out of the radiation sheet 120 .

[0042] In some embodiments, the structure of the extended radiation piece 120 matching the branch 130 includes: a rectangular cross, or a ring, etc.

[0043] In some embodiments, when the structure of the matching branch 130 extending from the radiation sheet 120 is rectangular, one end of the short side of the rectangular matching branch 130 is connected to the radiation sheet 120, and the other end extends outward. When the structure of the matching branch 130 extending from the radiation sheet 120 is cross-shaped, one end of the cross-shaped matching branch 130 is connected to the radiation sheet 120. Providing matching branches 130 of different shapes can improve the parameters of the radiation unit 100. By adjusting the parameters of the matching branches 130, the receiving and transmitting frequencies of the radiation unit 100 can be adjusted to adapt to different frequency bands and bandwidths.

[0044] In some embodiments, the structure of the matching branch 130 extending out of the radiation sheet 120 can also be set as a ring structure. The length of the matching branch 130 is set according to different resonant frequencies, which can improve the isolation between ports. The matching branch 130 can also change the path of the surface current of the antenna radiation sheet 120, thereby miniaturizing the radiation unit 100 and improving the cross-polarization level.

[0045] In some embodiments, the radiation unit 100 further includes a limiting column 150 . The limiting column 150 can be provided to enable the radiation unit 100 to be installed on other structures, such as a base station or other device.

[0046] In some embodiments, the dielectric plate 110 may be a plastic substrate having a dielectric constant of 4.0, a thickness of 1.2 mm, and a loss tangent of 0.005. The use of a plastic substrate for processing the dielectric plate 110 may improve the processing efficiency of the dielectric plate 110, reduce the overall mass of the radiation unit 100, and meet the parameter requirements of the radiation unit 100.

[0047] In some embodiments, the height of the first feeding pole 141 is set to 0.06 to 0.09 times the signal wavelength of the operating frequency band of the radiation unit 100; the height of the second feeding pole 142 is set to 0.06 to 0.09 times the signal wavelength of the operating frequency band of the radiation unit 100.

[0048] In some embodiments, when the first feeding post 141 is a P-type structure, it has a first rectangular closed-loop area, and the inner diameter side length of the first rectangular closed-loop area is set to 0.07 to 0.09 times the signal wavelength of the working frequency band of the radiation unit 100; the outer diameter side length of the first rectangular closed-loop area is set to 0.1 to 0.2 times the signal wavelength of the working frequency band of the radiation unit 100; when the second feeding post 142 is a P-type structure, it has a second rectangular closed-loop area, and the inner diameter side length of the second rectangular closed-loop area is set to 0.07 to 0.09 times the signal wavelength of the working frequency band of the radiation unit 100; the outer diameter side length of the second rectangular closed-loop area is set to 0.1 to 0.2 times the signal wavelength of the working frequency band of the radiation unit 100.

[0049] In some embodiments, when the shape of the matching branch is rectangular, the length of the matching branch 130 is set to 0.08 to 0.1 times the signal wavelength of the operating frequency band of the radiation unit 100; the width of the matching branch 130 is set to 0.02 to 0.04 times the signal wavelength of the operating frequency band of the radiation unit 100.

[0050] In some embodiments, Figure 1 and Figure 2 The radiation unit 100 shown in the figure is simulated and verified. The cross-polarization level of the radiation unit 100 at 0 degrees is reduced by 21dB, and the cross-polarization level at ±60 degrees is reduced by 9dB. The standing wave ratio in the 3.35 to 3.65GHz frequency band is lower than 1.3, and the isolation is less than -23dB. Applying the radiation unit 100 for signal transmission and reception can reduce the overall cross-polarization level of the antenna in a wide frequency band while miniaturizing the antenna.

[0051] In some embodiments, the dielectric plate 110 is manufactured by an integrated molding process; and the radiation sheet 120 is attached to the first surface of the dielectric plate 110 by an electroplating process.

[0052] In some embodiments, after the dielectric plate 110 is made using an integrated molding process, the radiation sheet 120 and the matching branch 130 are electroplated onto the dielectric plate 110 using an integrated molding process, which simplifies the production process of the radiation unit 100 and improves the production efficiency of the radiation unit 100. At the same time, when the dielectric plate 110 is manufactured, plastic materials can be used to reduce the complexity and cost of production and reduce the weight of the radiation unit 100. After the dielectric plate 110 is manufactured, the radiation sheet 120 and the matching branch 130 can be electroplated or chemically plated, which further improves the production efficiency of the radiation unit 100 and reduces the production cost.

[0053] In some embodiments, the structure of the extended radiation piece 120 matching the branch 130 is cross-shaped. The shapes of the first feed post 141 and the second feed post 142 are set to be "stem"-shaped. The structure of the extended radiation piece 120 matching the branch 130 is used to match the working frequency band of the radiation unit 100, and can be adjusted according to the working frequency band to achieve fine adjustment of the working frequency band. The shape of the first feed post 141 and the second feed post 142 using the "stem"-shaped structure can further improve the cross-polarization discrimination rate of the radiation unit 100, and the working bandwidth of the radiation unit 100 can be further optimized by adjusting the length, width, height and other related dimensions of the "stem" structure.

[0054] In some embodiments, the structure of the protruding radiation sheet 120 and the shape of the feeding post of the matching branch 130 can be configured differently according to the requirements of the radiation unit 100 itself, so as to adjust the working bandwidth and frequency of the radiation unit 100.

[0055] In a second aspect, an embodiment of the present application provides an antenna array. Figures 4 to 7 The antenna array comprises at least the following parts: a dielectric plate 110; and a plurality of radiation units 100 as described in any embodiment of the first aspect.

[0056] In some embodiments, the first radiation unit 101; the second radiation unit 102; the third radiation unit 103; the fourth radiation unit 104; the fifth radiation unit 105; the sixth radiation unit 106; the first power division feeding line 161; the second power division feeding line 162; the third power division feeding line 163; the fourth power division feeding line 164; the first feeding needle 171; the second feeding needle 172; the third feeding needle 173 and the fourth feeding needle 174.

[0057] In some embodiments, the power splitter feeder circuit is used to split an input signal into multiple smaller output signals, forming a multi-terminal network structure, thereby improving the stability of the antenna array.

[0058] In some embodiments, the integrated radiation unit 100 is used to facilitate the structural design and production of the multi-element antenna array, thereby facilitating the formation of a large or medium-sized antenna array. For example, the radiation unit 100 is used as a basic radiation unit, and adjacent radiation units are cascaded through power division feeding lines and feeding points to form an antenna array, thereby forming a large or medium-sized antenna array. For example, the second power division feeding line 162 is connected to the third radiation unit 103 through the metal hole 180, thereby realizing the feeding of the third radiation unit 103. The antenna array is fed through the power division feeding line and the feeding needle to send wireless electromagnetic signals to the outside.

[0059] In some embodiments, the radiating elements 100 in the antenna array can be configured to use the same radiating elements 100 or different radiating elements 100. The power splitter feeder lines and feed pins in the antenna array can feed the same or different radiating elements 100. Using different radiating elements 100 can improve the adaptability of the antenna array. Using the same radiating element 100 can improve production efficiency and reduce costs.

[0060] In some embodiments, the dielectric plate 110 is formed by integral injection molding, which can improve the production efficiency of the antenna array, simplify the required components, and reduce the weight of the antenna array, and can be applied to 5G base stations. In some embodiments, the radiation plate 120 and the matching branches 130 extending out of the radiation plate 120 are integrally formed by electroplating or chemical plating. Among them, the dielectric plate 110 is formed by an integrated injection molding process, and the dielectric plate 110 is a rectangular protruding structure with a cavity and a first surface, and protruding structures are respectively arranged around the rectangular protruding structure. Then, the electroplating or chemical plating process is applied to plate the radiation plate 120 and the matching branches 130 extending out of the radiation plate 120 onto the first surface of the dielectric plate 110 and the protruding structures around the rectangular protruding structure.

[0061] In some embodiments, the first radiation unit 101, the second radiation unit 102, the third radiation unit 103, the fourth radiation unit 104, the fifth radiation unit 105 and the sixth radiation unit 106 in the antenna array can be configured to use the same radiation unit or different radiation units.

[0062] In some embodiments, the dielectric plate 110 is integrally injection molded, which can improve the production efficiency of the antenna array, simplify the required components, and obtain an antenna array substrate with six radiation units 100 in one process. Then, the radiation sheet 120 and the matching branch 130 are made on the dielectric plate 110 through electroplating or chemical plating process to form the first radiation unit 101, the second radiation unit 102, the third radiation unit 103, the fourth radiation unit 104, the fifth radiation unit 105 and the sixth radiation unit 106.

[0063] In some embodiments, at least one middle cutting strip may be provided in the antenna array. The middle cutting strip may quickly separate the antenna array, and an antenna array with a specific number of radiation units 100 may be selected in application to achieve rapid selection of the antenna array. By flexibly selecting antenna arrays with different radiation units 100, the needs for transmitting and receiving different signals may be met.

[0064] In some embodiments, the power division feeding circuit corresponds to the feeding pin.

[0065] In some embodiments, the antenna array further includes a metal hole 180. The output end of the power division feeding circuit is connected to the metal hole 180 to realize the power division feeding of the antenna array. At the same time, the provision of the metal hole 180 can simplify the circuit in the antenna array, reduce material consumption, and further reduce the weight of the antenna array.

[0066] In some embodiments, the dielectric plate 110 is made by plastic injection molding, the power splitter feeder line slot is made by laser engraving, and the power splitter feeder line, feeder pin, radiation sheet 120 and matching branch 130 are made by electroplating or chemical plating.

[0067] In some embodiments, the antenna array may further include different numbers of radiation units 100, for example, 2, 3, 4, etc. Arranging antenna arrays with different numbers of radiation units 100 can meet the requirements of Massive MIMO technology, realize simultaneous transmission and reception of multiple signals, and improve the signal transmission and reception capability of the antenna array to meet the requirements of new mobile communication technologies for antenna arrays.

[0068] In some embodiments, the power division feeding lines and feeding pins in the antenna array can be adjusted according to the number of radiation elements 100 .

[0069] In a third aspect, an embodiment of the present application provides an antenna device, comprising: at least one antenna array as described above.

[0070] In some embodiments, the antenna device includes a baseband device, a radio frequency device, an integrated gNB device, and other devices. Among them, the baseband device includes different types of physical devices such as BBU, CU, and DU. The radio frequency device includes devices such as AAU and RRU. The antenna device uses an antenna array to reduce weight, thereby achieving lightweight and integrated antenna devices as a whole.

[0071] In a fourth aspect, an embodiment of the present application provides a base station, comprising: at least one antenna array as described above. The present invention is mainly applied to the field of base station antennas for 5G communications.

[0072] Massive MIMO is the core technology of 5G communication. The application of 5G massive antenna array has greatly increased the number of oscillators. At present, the mainstream array antenna mainly uses die-cast or PCB oscillators as radiation units, and the feeding form is mainly PCB board feeding. It is not only high in profile, large in size and heavy, but also complex in assembly, which is not suitable for the current and future 5G massive MIMO antenna arrays.

[0073] On the one hand, the embodiments of the present invention achieve a low profile of the oscillator by adding a P-type structure and matching branches to the radiating unit, while effectively reducing the cross-polarization level and widening the bandwidth; on the other hand, by adopting injection molding technology, laser engraving, and electrochemical plating technology, multiple radiating units and power division networks are modularized, replacing the traditional welding method of oscillators and power division networks, reducing the number of components and the overall weight of the antenna, thereby achieving lightweight and integrated antennas.

[0074] In some embodiments, the base station may use an antenna array to reduce weight, thereby achieving overall lightweighting and integration of the base station.

[0075] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A radiation unit, comprising: A dielectric plate, the dielectric plate comprising at least a first surface and a cavity; A radiation sheet, the radiation sheet being arranged on the first surface of the dielectric plate; A first feeding post, coupled to the radiation sheet and disposed in the cavity of the dielectric plate; A second feeding post, coupled to the radiation sheet, and disposed in the cavity of the dielectric plate, wherein the second feeding post is orthogonally symmetrically disposed with respect to the first feeding post; The cavity is a square cavity; the first feeding post extends from the first vertex of the cavity toward the center of the cavity, and the second feeding post extends from the second vertex of the cavity toward the center of the cavity, so that the first feeding post and the second feeding post are orthogonally symmetrically arranged, and the extension lines of the center lines of the first feeding post and the second feeding post intersect at an angle of 90 degrees; The height of the first feeding pole is set to be 0.06 to 0.09 times the wavelength of the signal in the working frequency band of the radiation unit; the height of the second feeding pole is set to be 0.06 to 0.09 times the wavelength of the signal in the working frequency band of the radiation unit; When the first feeding column is a P-type structure, it has a first rectangular closed loop area, and the inner diameter side length of the first rectangular closed loop area is set to 0.07 to 0.09 times the signal wavelength of the working frequency band of the radiation unit; the outer diameter side length of the first rectangular closed loop area is set to 0.1 to 0.2 times the signal wavelength of the working frequency band of the radiation unit; When the second feeding column is a P-type structure, it has a second rectangular closed loop area, and the inner diameter side length of the second rectangular closed loop area is set to 0.07 to 0.09 times the signal wavelength of the working frequency band of the radiation unit; the outer diameter side length of the second rectangular closed loop area is set to 0.1 to 0.2 times the signal wavelength of the working frequency band of the radiation unit; A matching branch is provided on the first surface of the dielectric plate, and the matching branch includes a structure extending out of the radiation plate.

2. The radiation unit according to claim 1, characterized in that: The structure of the matching branch extending out of the radiation piece includes: rectangular, cross or ring.

3. The radiation unit according to claim 2, characterized in that: When the structure of the matching branch extending out of the radiation piece is rectangular, the length of the matching branch is set to 0.08 to 0.1 times the signal wavelength of the working frequency band of the radiation unit; the width of the matching branch is set to 0.02 to 0.04 times the signal wavelength of the working frequency band of the radiation unit.

4. The radiation unit according to any one of claims 1 to 3, characterized in that: The dielectric plate is made by an integrated molding process; the radiation sheet is attached to the first surface of the dielectric plate by an electroplating process.

5. The radiation unit according to any one of claims 1 to 4, characterized in that: The dielectric plate is made by an integrated molding process; the radiation sheet and the matching branch are attached to the first surface of the dielectric plate by an electroplating process.

6. An antenna array, comprising: At least two radiating elements according to any one of claims 1 to 5.

7. The antenna array according to claim 6, characterized in that: Also includes: The dielectric plates of the at least two radiation units are made by an integrated molding process; The radiation plates of the at least two radiation units are attached to the first surface of the dielectric plate by using an electroplating process.

8. The antenna array according to any one of claims 6 or 7, characterized in that: Also includes: At least two power splitter feeder circuits; The power division feeding circuit is made by laser engraving and electroplating technology.

9. An antenna device, comprising: An antenna array as claimed in any one of claims 6 to 8.

10. A base station, comprising: An antenna array as claimed in any one of claims 6 to 8.

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