A lightweight, high-power, broadband dual-polarized antenna and antenna array

Abstract

The invention discloses a lightweight, high-power, broadband dual-polarized antenna and an antenna array. The antenna array is formed by arranging the dual-polarized antennas. The dual-polarized antenna includes two mutually orthogonal polarized vibrators arranged on a metal floor. The polarized vibrator includes a first vibrator arm and a second vibrator arm. The first vibrator arm includes a radiating plate and a common-mode suppression structure, and the second vibrator arm includes a radiating plate. The radiating plate is a plate body with a knife-shaped structure. The radiating plate of the first vibrator arm is vertically arranged on the metal floor through a common-mode suppression connecting column, and the bottom is suspended. The suspended bottom is connected to a radio frequency connector through a feeding connecting block connected to the radiating plate in an L-shaped structure. The radiating plate of the second vibrator arm is directly connected to the metal floor at the bottom. The two radiating plates are arranged in mirror symmetry, with a gap between them. The antenna of the invention has the advantages of high power resistance, multi-polarization, broadband, lightweight, low profile, high gain, simple structure, and convenient installation.

Description

Technical Field

[0001] The present invention relates to antennas, and in particular to dual-polarization array antennas. Background Art

[0002] Antennas are key components for transmitting or receiving radio communication systems. With the rapid development of current communication systems, antennas of various frequency bands have put forward higher requirements on the load of the system platform. Antennas of different frequency bands will also produce strong coupling interference to other antennas on the same platform. It is necessary to integrate antennas of various frequency bands into ultra-wideband antennas. Systems of different frequency bands share one or a few broadband antenna arrays, and the system integration is increased. In terms of anti-interference and target identification, antennas are required to provide multi-polarized target information. At the same time, the system platform has high requirements on the weight and size of the load, and the antenna needs to be designed to be lightweight and miniaturized.

[0003] For EMC test systems, bandwidth requirements of multiple frequencies are generally required. A simple centralized antenna cannot meet high field strength requirements. Limited by the RF connector and the power capacity of a single antenna, the use of a distributed spatial power synthesis method can greatly increase the upper limit of the system field strength. In antenna design, select an RF connector with appropriate power capacity. The metallic antenna vibrator has a higher power capacity than the microstrip dielectric board. At the same time, there will be some assembly errors in the antenna assembly process. Whether it is the installation of the antenna to the floor or the installation of the RF connector to the antenna, there will be assembly errors. For two-dimensional array antennas, it is more necessary to consider, otherwise there will be problems that the antenna cannot be installed later. Therefore, in terms of design, it is best that the antenna units are independent and have gaps. When welding large array antennas, especially metal antennas, it is often necessary to directly insert the RF connector into the metal antenna. It is necessary to add a welding observation window. The welding of blind holes has problems such as inability to directly observe and uncontrollable soldering. The design of the antenna unit feed port needs to be improved to facilitate the welding of the RF connector.

[0004] In view of the above problems, whether it is communication equipment or EMC test system, it is necessary to design an antenna with reasonable design that can effectively improve the above problems. The antenna must meet the requirements of high power, multi-polarization, broadband, lightweight, low profile, high gain, simple structure, easy installation and welding, etc. Summary of the invention

[0005] The problem to be solved by the present invention is to design an antenna that meets the requirements of high power resistance, multi-polarization, broadband, light weight, low profile, high gain, simple structure, and convenient installation and welding.

[0006] To solve the above problems, the solution adopted by the present invention is as follows:

[0007] A lightweight, high-power, broadband dual-polarized antenna according to the present invention comprises two mutually orthogonal polarized dipoles arranged on a metal floor; the polarized dipole comprises a first dipole arm connected to a radio frequency connector and a second dipole arm connected to the metal floor; the first dipole arm comprises a radiation plate and a common-mode suppression structure, and the second dipole arm comprises a radiation plate; the radiation plate is vertically arranged on the metal floor, and is a plate body formed by cutting a rectangular plate body whose four sides are an inner side, an outer side, a top side and a bottom side respectively, at a diagonal angle; the top side and the bottom side are parallel to the metal floor; the radiation plate of the first dipole arm and the radiation plate of the second dipole arm are relatively mirror-symmetrically arranged, and a gap is left between them; the inner side faces the inner side of the polarized dipole, and the top side is farther away from the metal floor than the bottom side; the diagonal angle cutting is a first angle cutting structure and a second angle cutting structure; the first angle cutting structure is formed by cutting along the first angle cutting bevel at a right angle between the outer side and the top side of the radiation plate; the second angle cutting structure is formed by cutting along the first angle cutting bevel at a right angle between the inner side and the bottom side The right angle between them is formed by cutting along the second angle-cut parallel side and the second angle-cut bevel side; the two ends of the first angle-cut bevel side are respectively connected to the outer side and the top side; the second angle-cut parallel side is parallel to the outer side, and the two ends are respectively connected to the bottom side and the second angle-cut bevel side; the two ends of the second angle-cut bevel side are respectively connected to the inner side and the second angle-cut parallel side; the common-mode suppression structure includes a common-mode suppression connecting column and a common-mode suppression resonant cavity; the bottom of the common-mode suppression connecting column is vertically connected to the metal floor, and the top is connected to the second angle-cut bevel side of the first dipole arm radiation plate; the common-mode suppression resonant cavity is a window area surrounded by the second angle-cut parallel side, the second angle-cut bevel side, the common-mode suppression connecting column and the metal floor of the radiation plate; the radiation plate of the first dipole arm is vertically arranged on the metal floor through the support of the common-mode suppression connecting column, and a bottom gap is left between the bottom side of the radiation plate and the metal floor; the bottom side of the radiation plate of the second dipole arm is connected to the metal floor through a bottom extension portion with the same height as the bottom gap and is vertically arranged on the metal floor.

[0008] Further, according to the dual-polarized antenna of the present invention, the first angle-cut bevel edge and the second angle-cut bevel edge are straight edges.

[0009] Further, according to the dual-polarized antenna of the present invention, the radiation plate and the common-mode suppression connecting column of the first dipole arm are an integrated plate body; the radiation plate and the bottom edge extension of the second dipole arm are an integrated plate body.

[0010] Furthermore, according to the dual-polarized antenna of the present invention, a plurality of rectangular chamfered air windows are provided in the middle of the radiation plate; the air windows of the radiation plate of the first dipole arm and the air windows of the radiation plate of the second dipole arm are symmetrical.

[0011] Further, according to the dual-polarized antenna of the present invention, the first dipole arm also includes a feed connection block connected to the radiation board; the bottom surface of the feed connection block is flush with the bottom edge of the radiation board, the outer side surface is flush with the outer side edge of the radiation board, and the inner side surface is flush with the second corner cut parallel edge of the radiation board, so that the radiation board and the feed connection block present an L-shaped structure; the feed connection block is provided with a welding hole for welding to the feed line.

[0012] Further, according to the dual-polarized antenna of the present invention, the radiation plate also includes an inner chamfered straight edge; the inner chamfered straight edge is formed by chamfering the right angle between the inner edge of the radiation plate and the plate surface by 45 degrees; and there is a chamfered straight edge partition gap between the inner chamfered straight edges of adjacent radiation plates.

[0013] Further, according to the dual-polarized antenna of the present invention, the metal floor is a square plate; the radiation plate is parallel to the side of the square metal floor; metal isolation grids with equal arm length L-shaped structures are respectively arranged at the four corners of the square metal floor; the outer sides of the two arms of the equal arm length L-shaped structure of the metal isolation grid are respectively aligned with the two adjacent sides of the square metal floor.

[0014] According to an antenna array of the present invention, the antenna array is formed by arranging the above-mentioned dual-polarized antennas in rows and columns on a reference plane; the metal floor of each dual-polarized antenna is parallel to the reference plane.

[0015] Further, according to the antenna array of the present invention, the metal floor is a square plate; the radiation plate is parallel to the side of the square metal floor; the four corners of the square metal floor are also provided with metal isolation grids of equal arm length L-shaped structure; the outer sides of the two arms of the equal arm length L-shaped structure of the metal isolation grid are respectively aligned with two adjacent sides of the square metal floor; the edges of the metal floors of adjacent dual-polarized antennas are tightly fitted, so that the metal isolation grids of the dual-polarized antennas are spliced ​​into a middle isolation grid with a cross structure in the middle of the board surface, and are spliced ​​into an edge isolation grid with a L-shaped structure at the edges.

[0016] Furthermore, according to the antenna array of the present invention, the metal floors of the dual-polarized antennas share a metal plate; the middle isolation grid is an integrated metal block component with a cross structure; and the edge isolation grid is an integrated metal block component with a L-shaped structure.

[0017] The technical effects of the present invention are as follows:

[0018] 1. The dual-polarized antenna of the present invention can realize horizontal and vertical polarized radiation of the antenna array, and can also realize 45-degree oblique polarized radiation, and has good impedance matching and directional pattern characteristics;

[0019] 2. The straight chamfer on the inner side of the radiator can enhance the capacitive coupling between the dipole arms, thereby eliminating the inductance effect of the metal floor on the antenna and achieving an impedance bandwidth of the antenna in the octave band;

[0020] 3. The L-shaped structure of the feed connection block and the radiation plate is connected, and the welding holes are pre-equipped, which greatly facilitates the welding connection between the feed connection block and the RF connector;

[0021] 4. The rectangular chamfered air window on the radiator greatly reduces the weight of the antenna and increases the current density without losing structural strength;

[0022] 5. The dual-polarized antenna unit of the present invention is a full metal component, which meets the use environment of high power resistance, and the number of overall components of the antenna array is small, so it is easy to install;

[0023] 6. The cross-sectional height of the dual-polarized antenna of the present invention is 0.52*λL of the low frequency, λL corresponds to the free space wavelength of the low frequency, so the cross-sectional height is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a dual-polarized antenna of the present invention.

[0025] Figure 2 yes Figure 1 A top view of an illustrated dual-polarized antenna embodiment.

[0026] Figure 3 yes Figure 2 Enlarged view of the dotted circle R.

[0027] Figure 4 It is a side schematic diagram of a polarized vibrator of an embodiment of a dual-polarized antenna of the present invention.

[0028] Figure 5 yes Figure 4 Dimensional diagram of the various structures of the polariton shown as an example.

[0029] Figure 6 It is a schematic diagram of the antenna array structure composed of the dual-polarized antenna embodiment of the present invention.

[0030] In the above figures, 1 is a metal floor, 2 is a polarization vibrator, 201 is a first polarization vibrator, 202 is a second polarization vibrator, 211 is a first vibrator arm, and 212 is a second vibrator arm;

[0031] 22 is a radiation plate, 221 is an inner side edge, 2211 is an inner side chamfered straight edge, 222 is an outer side edge, 223 is a top edge, 224 is a bottom plate, 225 is a first angle cut structure, 2251 is a first angle cut oblique edge, 226 is a second angle cut structure, 2261 is a second angle cut parallel edge, 2262 is a second angle cut oblique edge, 227 is an air window, 228 is a bottom edge gap, and 229 is a bottom edge extension;

[0032] 23 is a feed connection block, 231 is a welding hole, 24 is a common mode suppression structure, 241 is a common mode suppression connection column, and 242 is a common mode suppression resonant cavity;

[0033] 3 is a feeder; 4 is an air partition structure, 41 is an opposite partition gap, and 42 is a chamfered straight edge partition gap;

[0034] 5 is a metal isolation fence;

[0035] 90 is an antenna array, 900 is a dual-polarization antenna, 901 is a middle isolation fence, and 902 is an edge isolation fence. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] Figure 1 A lightweight high-power broadband dual-polarized antenna is exemplified, comprising a metal floor 1 and two mutually orthogonal polarized dipoles 2 arranged on the metal floor 1. The two orthogonal polarized dipoles 2 are respectively a first polarized dipole 201 and a second polarized dipole 202. The polarized dipole 2 comprises two dipole arms, namely a first dipole arm 211 connected to a radio frequency connector and a second dipole arm 212 connected to the metal floor 1. Figure 2 , Figure 3 , Figure 4 and Figure 5 The first dipole arm 211 includes a radiation plate 22, a feed connection block 23 and a common mode suppression structure 24, and the second dipole arm 212 includes a radiation plate 22. The radiation plate 22 is a plate-like body vertically arranged on the metal floor 1. The metal floor 1 is a plate body. The radiation plate 22 of the first dipole arm 211 and the radiation plate 22 of the second dipole arm 212 are arranged in mirror symmetry, and a gap is left between the two opposite radiation plates 22.

[0039] The radiation plate 22 is a rectangular plate with a thickness of D22, and four sides, namely, an inner side 221, an outer side 222, a top side 223, and a bottom side 224, and the plate surface is formed by cutting at the diagonal angle to present a knife-shaped structure. Among them, the inner side 221 and the outer side 222 are parallel; the top side 223 and the bottom side 224 are parallel and parallel to the metal floor 1; the inner side 221 and the outer side are perpendicular to the top side 223 and the bottom side 224. Here, the "inside" in the inner side 221 and the "outside" in the outer side 222 are relative to the polarizer 2, and the inner side is toward the center of the polarizer 2, and the opposite side is the outer side. The "top" and "bottom" in the top side 223 and the bottom plate 224 are relative to the metal floor 1, and the closer to the metal floor 1 is the "bottom", and the farther away is the "top".

[0040] The two corner cuts at the diagonal positions of the radiation plate 22 are respectively a first corner cut structure 225 and a second corner cut structure 226. The first corner cut structure 225 is formed by cutting along the first corner cut bevel 2251 at the right angle between the outer side 222 and the top side 223 of the radiation plate 22; the second corner cut structure 226 is formed by cutting along the second corner cut parallel side 2261 and the second corner cut bevel 2262 at the right angle between the inner side 221 and the bottom side 224. The first corner cut bevel 2251 has two ends connected to the outer side 222 and the top side 223, respectively. The second corner cut parallel side 2261 is parallel to the outer side 222 and the inner side 221, and has two ends connected to the bottom side 224 and the second corner cut bevel 2262, respectively; the second corner cut bevel 2262 has two ends connected to the inner side 221 and the second corner cut parallel side 2261, respectively. The two corner cuts of the radiation plate 22 make the two symmetrical radiation plates 22 of the polarizer 2 close to each other on the inner side away from the metal floor 1 , and away from each other on the inner side close to the metal floor 1 .

[0041] The length of the radiation board 22, i.e., the distance from the top edge 223 to the bottom edge 224, is H22; the width, i.e., the distance between the inner side edge 221 and the outer side edge 222, is W22. The distance from the connection point of the first angle-cut bevel edge 2251 and the top edge 223 to the inner side edge 221 is W223, and the distance to the outer side edge 222 is W225=W22-W223; the distance from the connection point of the first angle-cut bevel edge 2251 and the outer side edge 222 to the top edge 223 is H225, and the distance to the bottom edge 224 is H22-H225. The distance from the second angle-cut parallel edge 2261 to the inner side edge 221 is W226, and the distance from the outer side edge 222 is W229=W22-W226. The distance from the connection point of the second angle cut bevel 2262 and the inner side 221 to the top side 223 is H221, and the distance to the bottom side 224 is H22-H221. The distance from the connection point of the second angle cut bevel 2262 and the second angle cut parallel side 2261 to the bottom side 224 is H2261, and the distance to the top side 223 is H22-H2261.

[0042] It should be noted that in the example diagram of this embodiment, the first angle cut bevel 2251 and the second angle cut bevel 2262 are both straight edges. Those skilled in the art will appreciate that in other optional embodiments, the first angle cut bevel 2251 and the second angle cut bevel 2262 may also be curved edges. For example, the first angle cut bevel 2251 is a curved edge whose two ends are tangent to the outer side edge 222 and the top edge 223, respectively; the second angle cut bevel 2262 is an S-shaped curved edge whose two ends are tangent to the inner side edge 221 and the second angle cut parallel edge 2261, respectively. For another example, the first angle cut bevel 2251 is an exponentially gradient curved edge.

[0043] The feed connection block 23 of the first dipole arm 211 is used to connect the first dipole arm 211 to the RF connector. It is a plate body with a width of W229 and a height of H23, connected to the bottom plate surface of the radiation plate 22 of the first dipole arm 211, with the bottom surface flush with the bottom edge 224 of the radiation plate 22, the outer side surface flush with the outer side edge 222 of the radiation plate 22, and the inner side surface flush with the second angle-cut parallel edge 2261 of the radiation plate 22, so that the radiation plate 22 and the feed connection block 23 present an L-shaped structure. A welding hole 231 for connecting with the RF connector feed line 3 is provided in the center of the feed connection block 23.

[0044] The common mode suppression structure 24 of the first dipole arm 211 includes a common mode suppression connection column 241 and a common mode suppression resonant cavity 242. The common mode suppression connection column 241 is a plate column with a width of W241, and is vertically connected to the metal floor 1 at the bottom, connected to the radiation plate 22 of the first dipole arm 211 at the top, and connected to the second angle cut bevel 2262 of the radiation plate 22. The common mode suppression resonant cavity 242 is a window area surrounded by the second angle cut parallel edge 2261 of the radiation plate 22, the second angle cut bevel 2262, the common mode suppression connection column 241 and the metal floor 1. The width of the common mode suppression resonant cavity 242, that is, the distance between the second angle cut parallel edge 2261 and the common mode suppression connection column 241 is W242. The distance between the common mode suppression connection column 241 and the inner side 221 is W243=W226-W241-W242.

[0045] The radiation plate 22 of the first dipole arm 211 is vertically arranged on the metal floor 1 through the support of the common mode suppression connection column 241, and a bottom gap 228 with a height of H228 is left between the bottom edge 224 of the radiation plate 22 and the bottom surface of the feed connection block 23 and the metal floor 1. The bottom edge 224 of the radiation plate 22 of the second dipole arm 212, which is symmetrical with the radiation plate 22 of the first dipole arm 211, is connected to the metal floor 1 through a bottom edge extension 229 with a height of H228. The bottom edge extension 229 of the second dipole arm 212 is symmetrical with the lower part of the radiation plate 22 of the bottom edge gap 228 of the first dipole arm 211. In other words, the radiation plate 22 of the first dipole arm 211 is vertically arranged on the metal floor 1 through the common mode suppression connection column 241, and the bottom of the radiation plate 22 is suspended from the metal floor 1; while the radiation plate 22 of the second dipole arm 212 is vertically arranged in a manner that the bottom is directly connected to the metal floor 1. The feed line 3 of the RF connector connected to the feed connection block 23 of the first dipole arm 211 vertically passes through the bottom gap 228 and passes through the metal floor 1, and is insulated from the metal floor 1. When the feed line 3 of the RF connector is assembled with the feed connection block 23, the feed line 3 is inserted into the welding hole 231 of the feed connection block 23 and then fixed by welding.

[0046] It should be pointed out that the radiation plate 22 in the present invention is a plate-shaped structure of the symmetrical parts of the first dipole arm 211 and the second dipole arm 212. In a specific implementation, preferably, the radiation plate 22 of the first dipole arm 211 and the common mode suppression connecting column 241 are an integrated plate, which can be referred to as the first dipole arm radiation plate; the radiation plate 22 of the second dipole arm 212 and the bottom edge extension 229 are an integrated plate, which can be referred to as the second dipole arm radiation plate.

[0047] The two polarized vibrators 2 are orthogonal to each other, which means that the two radiating plates 22 of the two vibrator arms of the first polarized vibrator 201 are perpendicular to the two radiating plates 22 of the two vibrator arms of the second polarized vibrator 202, and the perpendicular intersection is located at the gap between the two radiating plates 22 of the two vibrator arms of the polarized vibrator 2, so that the four radiating plates 22 are vertically arranged in four directions of the gap at 90 degrees with the center of the gap as the center, and thus an air partition structure 4 is formed at the intersection of the gaps of the four radiating plates 22. The air partition structure 4 includes a square-shaped opposing partition gap 41 located in the center and chamfered straight-edge partition gaps 42 located at the four corners of the opposing partition gap 41. The side length of the opposing partition gap 41, that is, the distance between the two opposing radiating plates 22 of the polarized vibrator 2, is W41. The chamfered straight edge partition gap 42 is constructed by the inner side chamfered straight edges 2211 formed by the inner side chamfered straight edges 2211 of two adjacent radiation panels 22 being chamfered at 45 degrees to the right angle between the panel surface. The width of the chamfered straight edge partition gap 42, that is, the parallel distance between the inner side chamfered straight edges 2211 of two adjacent radiation panels 22, is W42.

[0048] In addition, in this embodiment, a plurality of rectangular chamfered air windows 227 are provided in the middle of the radiation plate 22. The air windows 227 can reduce the weight of the radiation plate 22 on the one hand, and can also cut off the current path on the other hand, so that the current density on the radiation plate 22 is more concentrated. The air windows 227 on the radiation plates 22 of the two dipole arms of the polarization dipole 2 are symmetrical.

[0049] In this embodiment, the metal floor 1 is a square plate with a side length of W1, two mutually orthogonal polarization vibrators 2 are orthogonal to the center of the metal floor 1, the radiation plates 22 of the two polarization vibrators 2 are parallel to the side of the square metal floor 1, and there is a gap with a width of W21 between the outer side 222 of the radiation plate 22 and the side of the square metal floor 1. Metal isolation grids 5 can be further arranged at the four corners of the square metal floor 1. The metal isolation grid 5 is an equal arm length L5 L-shaped structure formed by vertically connecting two metal square bars with a width of W5 and a thickness of H5. The outer sides of the two arms of the equal arm length L-shaped structure are aligned with the two adjacent sides of the square metal floor 1 respectively. The metal isolation grid 5 is used to improve the port isolation between the two orthogonal polarization vibrators 2.

[0050] In this embodiment, the size parameters of each component are configured as follows: the thickness D22 of the radiation plate 22 is 3mm~6mm, the width W22 is 25mm~40mm, and the length or height H22 is 70mm~80mm; the spacing W41 of the radiation plate 22 in the polarizer 2 is 3mm~6mm, and the width W42 of the chamfered straight edge partition gap is 0.5mm~2mm; the width W21 between the outer edge 222 of the radiation plate 22 and the edge of the metal floor 1 is 0.5mm~1mm; in the common mode suppression structure 24 structure, the width W241 of the common mode suppression connecting column 241 is 3mm~6mm, and the width W242 of the common mode suppression resonant cavity 242 is 5mm~8mm. Those skilled in the art understand that in specific implementation, the above-mentioned size parameters can be adaptively adjusted and modified according to different needs and purposes.

[0051] Example 2

[0052] Figure 6 An antenna array composed of the dual-polarized antennas in Embodiment 1 is illustrated. Figure 6 In the figure, the dual-polarized antenna 900 is the dual-polarized antenna of the aforementioned embodiment 1, and 90 is an antenna array. The antenna array is formed by arranging the dual-polarized antennas 900 in the embodiment 1 in rows and columns on a reference plane. The reference plane is usually provided by a support plate, and the metal floor 1 of each dual-polarized antenna 900 is laid flat on the board surface of the support plate, so that the metal floor 1 is parallel to the reference plane. When the metal floor 1 is laid flat, the edges between adjacent metal floors 1 are tightly fitted, so that the metal isolation grid 5 of the dual-polarized antenna 900 is spliced ​​into a middle isolation grid 901 with a cross structure in the middle of the board surface, and is spliced ​​into an edge isolation grid 902 with a L-shaped structure at the edge.

[0053] Those skilled in the art will appreciate that, in another optional implementation, the reference plane may also be provided by the metal floor 1 of the dual-polarized antenna 900. The metal floors 1 of all dual-polarized antennas 900 share a metal plate. At the same time, the middle isolation grid 901 and the edge isolation grid 902 may also be replaced by metal block components of an integrated structure, thereby reducing the number of metal isolation grid 5 components that need to be assembled during the assembly process of the entire antenna array.

[0054] When the antenna array parameters M and N of this embodiment are 6, that is, the antenna array is 6×6, when simulating scanning at 0° and 60°, within the entire bandwidth range of 600-2000 MHz, the reflection coefficient of the port is less than 1.5 when pointing at 0°, and the reflection coefficient of the port is less than 3 when pointing at 60°. That is to say, the dual-polarized antenna of the present invention achieves good impedance matching and radiation pattern characteristics within the bandwidth range of 600-2000 MHz.

Claims

1. A lightweight, high-power, broadband dual-polarized antenna, characterized in that: The invention comprises two mutually orthogonal polarization oscillators (2) arranged on a metal floor (1); the polarization oscillator (2) comprises a first oscillator arm (211) connected to a radio frequency connector and a second oscillator arm (212) connected to the metal floor (1); the first oscillator arm (211) comprises a radiation plate (22) and a common mode suppression structure (24), and the second oscillator arm (212) comprises a radiation plate (22); the radiation plate (22) is vertically arranged on the metal floor (1), and is formed by cutting a rectangular plate body whose four sides are an inner side (221), an outer side (222), a top side (223) and a bottom side (224) at opposite corners; the top side (223) and the bottom side (224) are parallel to the metal floor (1); the first oscillator The radiation plate (22) of the first arm (211) and the radiation plate (22) of the second dipole arm (212) are arranged in mirror symmetry, with a gap between them; the inner side edge (221) faces the inner side of the polarization dipole (2), and the top edge (223) is farther away from the metal floor (1) than the bottom edge (224); the diagonal cuts are a first diagonal cut structure (225) and a second diagonal cut structure (226); the first diagonal cut structure (225) is formed by cutting off the right angle between the outer side edge (222) and the top edge (223) of the radiation plate (22) along the first diagonal cut oblique edge (2251); the second diagonal cut structure (226) is formed by cutting off the right angle between the inner side edge (221) and the bottom edge (224) along the second diagonal cut parallel edge (2261) and the second diagonal cut parallel edge (2261); The angle-cut bevel (2262) is cut and formed; the two ends of the first angle-cut bevel (2251) are respectively connected to the outer side (222) and the top side (223); the second angle-cut parallel side (2261) is parallel to the outer side (222), and the two ends are respectively connected to the bottom side (224) and the second angle-cut bevel (2262); the two ends of the second angle-cut bevel (2262) are respectively connected to the inner side (221) and the second angle-cut parallel side (2261); the common-mode suppression structure (24) comprises a common-mode suppression connection column (241) and a common-mode suppression resonant cavity (242); the bottom of the common-mode suppression connection column (241) is vertically connected to the metal floor (1), and the top is connected to the second angle-cut bevel (2262) of the radiation plate (22) of the first dipole arm (211) The common-mode suppression resonant cavity (242) is a window area surrounded by the second angle-cut parallel edge (2261), the second angle-cut oblique edge (2262), the common-mode suppression connecting column (241) and the metal floor (1) of the radiation plate (22); the radiation plate (22) of the first dipole arm (211) is vertically arranged on the metal floor (1) through the support of the common-mode suppression connecting column (241), and a bottom edge gap (228) is left between the bottom edge (224) of the radiation plate (22) and the metal floor (1); the bottom edge (224) of the radiation plate (22) of the second dipole arm (212) is vertically arranged on the metal floor (1) by connecting the metal floor (1) through a bottom edge extension portion (229) having the same height as the bottom edge gap (228).

2. The dual-polarized antenna according to claim 1, characterized in that: The first angle bevel (2251) and the second angle bevel (2262) are straight edges.

3. The dual-polarized antenna according to claim 1, characterized in that: The radiation plate (22) and the common-mode suppression connection column (241) of the first dipole arm (211) are plates of an integrated structure; the radiation plate (22) and the bottom edge extension (229) of the second dipole arm (212) are plates of an integrated structure.

4. The dual-polarized antenna according to claim 1, characterized in that: A plurality of rectangular chamfered air windows (227) are also provided in the middle of the radiation plate (22); the air windows (227) of the radiation plate (22) of the first vibrator arm (211) and the air windows (227) of the radiation plate (22) of the second vibrator arm (212) are symmetrical.

5. The dual-polarized antenna according to claim 1, characterized in that: The first dipole arm (211) further comprises a feed connection block (23) connected to the radiation plate (22); the bottom surface of the feed connection block (23) is flush with the bottom edge of the radiation plate (22), the outer side surface is flush with the outer side edge (222) of the radiation plate (22), and the inner side surface is flush with the second angle-cut parallel edge (2261) of the radiation plate (22), so that the radiation plate (22) and the feed connection block (23) present an L-shaped structure; and the feed connection block (23) is provided with a welding hole (231) for welding and connecting with a feed line (3).

6. The dual-polarized antenna according to claim 1, characterized in that: The radiation plate (22) further comprises an inner chamfered straight edge (2211); the inner chamfered straight edge (2211) is formed by chamfering the right angle between the inner edge (221) of the radiation plate (22) and the plate surface by 45 degrees; and a chamfered straight edge partition gap (42) is provided between the inner chamfered straight edges (2211) of adjacent radiation plates (22).

7. The dual-polarized antenna according to any one of claims 1 to 6, characterized in that: The metal floor (1) is a square plate; the radiation plate (22) is parallel to the side of the square metal floor (1); metal isolation grilles (5) with equal arm length L-shaped structures are respectively arranged at the four corners of the square metal floor (1); the outer sides of the two arms of the equal arm length L-shaped structure of the metal isolation grille (5) are respectively aligned with the two adjacent sides of the square metal floor (1).

8. An antenna array, characterized in that: The antenna array is formed by arranging the dual-polarized antennas according to any one of claims 1 to 6 in rows and columns on a reference plane; the metal floor (1) of each dual-polarized antenna is parallel to the reference plane.

9. The antenna array according to claim 8, characterized in that: The metal floor (1) is a square plate; the radiation plate (22) is parallel to the side of the square metal floor (1); metal isolation grilles (5) with equal arm length L-shaped structures are respectively arranged at the four corners of the square metal floor (1); the outer sides of the two arms of the equal arm length L-shaped structure of the metal isolation grille (5) are respectively aligned with the two adjacent sides of the square metal floor (1); The edges of the metal floors (1) of adjacent dual-polarized antennas fit closely together, so that the metal isolation grilles (5) of the dual-polarized antennas are spliced ​​into a middle isolation grille with a cross structure in the middle of the board surface, and are spliced ​​into an edge isolation grille with a L-shaped structure at the edges.

10. The antenna array according to claim 9, characterized in that: The metal floor (1) of each dual-polarized antenna shares a metal plate body; the middle isolation grid is an integrated metal block component with a cross structure; and the edge isolation grid is an integrated metal block component with a L-shaped structure.

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