Radiating elements, antenna subarrays and antenna arrays

Abstract

The present invention provides a radiation unit, an antenna subarray and an antenna array. The radiation unit is an integrally formed structure, comprising two pairs of radiation arms arranged orthogonally in polarization, each radiation arm having a radiation surface arranged in a coplanar manner, and each radiation arm in the same polarization is provided with a corner portion bent in the back direction opposite to the radiation surface at its end far from the other radiation arm; along the circumference of the radiation unit, an edge for connecting the two corner portions is provided between two adjacent corner portions, and the edge is bent in the same direction as the corner portion. The radiation unit can be provided with a corner portion bent in the back direction of the radiation unit at the end far from the other radiation arm of each radiation arm in the same polarization, and the corner portion will improve the structural strength of the radiation arm unit and reduce the cross polarization of the radiation unit; an edge for connecting the two corner portions and bent in the same direction as the corner portion is provided between two adjacent corner portions, and the provision of the edge facilitates the miniaturization of the radiation unit and improves the isolation of the radiation unit.

Description

Technical Field

[0001] The present invention belongs to the technical field of mobile communications, and in particular relates to a radiation unit, an antenna subarray configured with the radiation unit, and an antenna array configured with the antenna subarray. Background Art

[0002] Since the fifth-generation mobile communication network began to be covered, the fifth-generation mobile communication network has ushered in large-scale production and construction. Therefore, the industry's demand for antennas that can be used in the fifth-generation mobile communication network has become increasingly strong. As one of the most important components of the antenna, the radiation unit has also become increasingly needed. Therefore, it is urgent to improve the production efficiency of the radiation unit.

[0003] However, the manufacturing process of the radiation unit suitable for the fifth generation mobile communication network is complicated, and it is generally produced by the STM process. The radiation units produced by the STM process are generally die-cast patch vibrators and PCB patch vibrators, but the PCB patch vibrators have problems such as poor structural strength, many parts and complex assembly process; the die-cast patch vibrators have the disadvantages of long mold opening cycle, high cost, and high mass. Therefore, the use of traditional STM process to produce radiation units will increase the production and manufacturing cost of the radiation units of the fifth generation mobile communication network, which is not conducive to large-scale promotion.

[0004] In order to solve the cost problem of radiating units suitable for use in fifth-generation mobile communication networks, the industry has proposed an one-piece radiating unit. However, the radiation performance of the one-piece radiating unit is poor and is not suitable for use in fifth-generation mobile communication networks. Moreover, the structure of the one-piece radiating unit is unstable, the radiating unit is easy to bend and deform, the current density is large, and the current flow direction is inconsistent, which does not meet the design requirements. The radiation efficiency and cross-polarization are greatly affected.

[0005] Therefore, the industry is in urgent need of a radiation unit that combines radiation performance with structural stability and has a simple manufacturing process. Summary of the invention

[0006] The first object of the present invention is to provide a radiation unit which is integrally formed and has better radiation performance.

[0007] A second object of the present invention is to provide an antenna subarray.

[0008] The present invention aims to provide an antenna array.

[0009] Suitable for the purpose of the present invention, the present invention adopts the following technical solution:

[0010] A radiation unit is provided for the first purpose of the present invention, which is an integrally formed structure and includes two pairs of radiation arms arranged orthogonally in polarization, each radiation arm having a radiation surface arranged in a coplanar manner, and each radiation arm in the same polarization is provided with a corner portion bent in a back direction opposite to the radiation surface at its end far from the other radiation arm; along the circumference of the radiation unit, an edge for connecting the two adjacent corner portions is provided between the two adjacent corner portions, and the edge is bent in the same direction as the corner portion.

[0011] Furthermore, a sunken groove is provided in the middle of each radiation arm, and the sunken groove extends from the end of the radiation arm toward another radiation arm of the same polarization.

[0012] Furthermore, the edge has a narrower dimension than the corners connected thereto on both sides to form an open slot.

[0013] Specifically, the radiation unit includes four feeding pins corresponding to four radiation arms respectively, one end of each feeding pin is connected to the edge of a corresponding sunken groove, and one end is bent into a mounting plate parallel to the radiation surface.

[0014] Preferably, the feeding pins are all parts formed by punching the radiation unit to form an inner groove and then bending it.

[0015] Specifically, the area occupied by the feeding pin is substantially the same as that of the sunken groove.

[0016] Preferably, a separation groove for separating the two adjacent radiation arms is provided between the two radiation arms, and the four separation grooves corresponding to the two pairs of radiation arms are connected to form a cross groove.

[0017] Specifically, an isolation groove is provided between two adjacent radiation arms, the isolation groove is arranged parallel to the edge between the two radiation arms, and an opening communicating with the isolation groove is also provided on the edge to form an open structure.

[0018] Preferably, the radiation unit is formed by sheet metal stamping.

[0019] An antenna subarray is provided for the second purpose of the present invention, characterized in that it includes a dielectric plate and a plurality of radiating units provided for the first purpose arranged on the dielectric plate, and a differential feeding network electrically connected to the plurality of radiating units is provided on the dielectric plate to feed each radiating unit through the differential feeding network.

[0020] Furthermore, the multiple radiation units are arranged in columns or rows.

[0021] Preferably, the antenna subarray includes three radiating units, and the three radiating units constitute a 1 / 3 subarray.

[0022] An antenna array is provided for another purpose of the present invention, characterized in that it includes multiple antenna sub-arrays provided as the second purpose, and the multiple antenna sub-arrays are arranged side by side.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] Firstly, the radiation unit of the present invention can be provided with a corner portion bent toward the back side of the radiation unit at the end of each radiation arm of the same polarization far from the other radiation arm, and a stable triangular structure can be formed between the corner portion and the radiation arm, which is beneficial to the stability of the structure of the radiation unit; the bent corner portion can gather the current fed into the radiation arm thereon, which can improve the gain of the radiation unit and reduce cross polarization.

[0025] Secondly, an edge is provided between two adjacent corners of the radiation unit of the present invention, which is used to connect the two corners and is bent in the same direction as the corners. The setting of the edge will extend the edge length of the radiation unit, which is conducive to the miniaturization of the radiation unit and improves the isolation of the radiation unit.

[0026] Thirdly, the radiating surfaces are arranged coplanarly between the radiating arms of the radiating unit of the present invention, so that the radiating unit can radiate signals in the same direction, and the bent corners and edges will not affect the direction of the external radiated signals of the radiating unit.

[0027] In addition, the radiation unit of the present invention is an integrated structure, which can reduce the production and processing links of the radiation unit, reduce costs, and facilitate large-scale production.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 FIG. 4 is a top view of a radiation unit according to an embodiment of the present invention.

[0031] Figure 2 A three-dimensional diagram of a radiation unit according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of a radiation unit disposed on a dielectric plate according to an embodiment of the present invention.

[0033] Figure 4 FIG. 4 is a top view of a radiation unit according to another embodiment of the present invention.

[0034] Figure 5It is a schematic diagram of the structure of the antenna subarray of the present invention.

[0035] Figure 6 It is a schematic diagram of the structure of the antenna array of the present invention.

[0036] Figure 7 It is a simulation curve diagram of the standing wave ratio when the test antenna uses the radiation unit provided by the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0038] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0039] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0040] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0041] The present invention provides a radiation unit which is integrally formed and can increase gain, expand frequency band and improve isolation.

[0042] In an exemplary embodiment of the present invention, Figure 1 and Figure 2 The radiation unit 10 includes two pairs of radiation arms 11, corners 12, edges 13 and feeding pins 14 for supporting the radiation arms 11.

[0043] The two pairs of radiation arms 11 are arranged in a polarization orthogonal manner, and the radiation surfaces of the two pairs of radiation arms 11, a total of four radiation arms 11, are on the same plane. The four radiation arms 11 are in regular shapes, such as rectangles, triangles, pentagons, hexagons, etc. In a typical embodiment of the present invention, the radiation arm 11 is rectangular, and the technical solution of the present invention is disclosed below using a rectangular radiation arm 11.

[0044] Since the two pairs of radiation arms 11 are arranged in a polarization-orthogonal manner, the radiation arms 11 are adjacent to each other, and one radiation arm 11 is adjacent to two radiation arms 11 of another polarization, and is opposite to another radiation arm 11 of the same polarization. The rectangular radiation arm 11 has four ends, and three of the four ends are respectively opposite to, adjacent to, or connected to the other three radiation arms 11 of the radiation unit 10; and the remaining end is not opposite to, adjacent to, or connected to the other three radiation arms 11 of the radiation unit 10, and this end is called an angle end 15. The four radiation arms 11 of the radiation unit 10 each have an angle end 15.

[0045] Specifically, the four radiation arms 11 of the radiation unit 10 are respectively a first radiation arm 111, a second radiation arm 112, a third radiation arm 113 and a fourth radiation arm 114, wherein the first radiation arm 111 and the third radiation arm 113 are at the same polarization, the second radiation arm 112 and the fourth radiation arm 114 are at the same polarization, the first radiation arm 111 is adjacent to the second radiation arm 112 and the fourth radiation arm 114, respectively, and the third radiation arm 113 is adjacent to the second radiation arm 112 and the fourth radiation arm 114, respectively.

[0046] Taking the first radiation arm 111 as an example, the rectangular first radiation arm 111 has four ends, which are respectively a first end, a second end, a third end and a fourth end, wherein the first end is opposite to the third radiation arm 113, the second end is adjacent to the fourth radiation arm 114, the fourth end is adjacent to the second radiation arm 112, and the third end is not adjacent to the second radiation arm 112, the third radiation arm 113 and the fourth radiation arm 114, then the third end is the corner end 15.

[0047] The corner portion 12 is disposed on the corner end portion 15. The corner portion 12 is bent from the radiation surface of the radiation arm 11 toward the back direction opposite to the radiation surface. The corner portion 12 may be a regular shape or an irregular shape, such as a triangle, a rectangle, a pentagon, a hexagon, a circle, an ellipse, etc. The bending angle of the corner portion 12 toward the back direction of the radiation arm 11 is between 0° and 180°, and the preferred bending angle is 30°, 45° and 60°. In one embodiment, the corner portion 12 is integrally connected to the corner end portion 15, and the corner portion 12 and the corner end portion 15 are connected by a surface connection.

[0048] A corner portion 12 is correspondingly arranged on the corner end 15 of each of the four radiation arms 11 of the radiation unit 10, that is, a corner portion 12 is correspondingly arranged on the corner end 15 of the first radiation arm 111, a corner portion 12 is correspondingly arranged on the corner end 15 of the second radiation arm 112, a corner portion 12 is correspondingly arranged on the corner end 15 of the third radiation arm 113, and a corner portion 12 is correspondingly arranged on the corner end 15 of the fourth radiation arm 114; the four corner portions 12 all have the same bending angle. Providing corner portions 12 on the four radiation arms 11 of the radiation unit 10 will improve the structural strength of the radiation arm 11 unit and reduce the cross polarization of the radiation unit 10. The corner portion 12 connected to the corner end 15 of the radiation arm 11 will form a stable triangular structure corresponding to the radiation arm 11, which is conducive to the stability of the structure of the radiation arm 11; and the bent corner portion 12 will gather the current fed into the radiation unit 10 thereon, so as to enhance the gain of the radiation unit 10 and reduce the cross polarization.

[0049] The edge 13 is disposed between two adjacent corners 12 of the radiation arm 11, and the edge 13 is bent in the same direction as the corner 12. Specifically, in the circumferential direction of the radiation unit 10, an edge 13 for connecting the two corners 12 is disposed between two adjacent corners 12, and the edge 13 is bent from the radiation surface of the radiation unit 10 toward the back surface, and the bending angle of the edge 13 is the same as the bending angle of the corner 12. The bending arrangement of the edge 13 will extend the length of the edge of the radiation unit 10, which will be conducive to the miniaturization of the radiation unit 10, and the reduction in the size of the radiation unit 10 will reduce the distance between each radiation unit 10 of the antenna and the antenna isolation strip, so that the influence of the antenna isolation strip on the radiation unit 10 is also reduced accordingly, so as to improve the isolation of the radiation unit 10. In one embodiment, the edge 13 is parallel to the imaginary connecting line between the two corner ends 15 corresponding to the two corners 12 connected to it.

[0050] The edge 13 is further provided with an opening groove 131 , which is arranged along the length direction of the edge 13 . Specifically, the opening groove 131 is formed because the edge 13 has a narrower size relative to the corners 12 connected to the two sides thereof.

[0051] The four radiation arms 11 of the radiation unit 10 correspond to four corner ends 15 , and two adjacent corner ends 15 among the four corner ends 15 are connected by an edge 13 , so four edges 13 are correspondingly provided on the radiation unit 10 .

[0052] The radiating arm 11 is also provided with a recessed groove 16, which is extended from the corner end 15 of the radiating arm 11 in the direction of another radiating arm 11 of the same polarization. The recessed groove 16 is a through groove provided on the radiating arm 11, and the provision of the recessed groove 16 can be used to extend the electrical connection length of the radiating unit 10 and improve the gain of the radiating unit 10. In one embodiment, the recessed groove 16 can be in a rectangular shape, a pentagonal shape, an elliptical shape, and the like.

[0053] In another embodiment, the recessed groove 16 may extend to the corner 12, reducing the area of ​​the recessed groove 16 and increasing the electrical connection length of the radiation unit 10. The shape of the recessed groove 16 extending to the corner 12 may be rectangular, semi-elliptical, semi-circular, etc. In some embodiments, in order to facilitate the recessed groove 16 to extend to the corner 12, the recessed groove 16 may also be extended to the two edges 13 on both sides of the corner 12.

[0054] Each of the four radiation arms 11 of the radiation unit 10 is provided with a recessed groove 16 , so as to reduce the radiation surface area of ​​the radiation unit 10 and increase the electrical connection length of the radiation unit 10 .

[0055] A separation slot 17 for separating two adjacent radiation arms 11 of the radiation unit 10 is provided, and the four separation slots 17 correspondingly formed between the four radiation arms 11 of the radiation unit 10 are connected to form a cross slot 171 in the radiation unit 10. Specifically, a separation slot 17 is provided between the first radiation arm 111 and the second radiation arm 112; a separation slot 17 is provided between the second radiation arm 112 and the third radiation arm 113; a separation slot 17 is provided between the third radiation arm 113 and the fourth radiation arm 114; a separation slot 17 is provided between the fourth radiation arm 114 and the first radiation arm 111, and the four separation slots 17 are connected to form a cross slot 171.

[0056] In one embodiment, when the radiation unit 10 is a cross-dipole radiation unit 10, the cross slot 171 can be used for a complementary conductor, so that the radiation unit 10 of the present invention works in a dipole mode. By loading the cross slot 171, the radiation unit 10 can be fed with dual frequency points to improve the bandwidth of the radiation unit 10. The working frequency band of the radiation unit 10 is between 3.2 GHz and 4.2 GHz. Preferably, the radiation unit 10 can feed a frequency point of 4.05 GHz. The cross slot 171 can also make the current distribution on the radiation unit 10 more uniform to improve the gain of the radiation unit 10. In addition, the setting of the cross slot 171 will change the electrical length between the feeding pins 14 between the two radiation arms 11 in the polarization direction, thereby adjusting the standing wave of the radiation unit 10.

[0057] Combination Figure 7 , Figure 71 is a simulation curve of the standing wave ratio of the test antenna when the test antenna uses the radiation unit 11. Figure 7 It can be seen that, because the cross slot 171 of the radiation unit 11 of the present invention can feed out a frequency point of 4.05 GHz, and the edge 13 can feed out a frequency point of 3.3 GHz, the cross slot 171 and the edge 13 can jointly expand the bandwidth.

[0058] In one embodiment, in combination Figure 4 An isolation slot 18 is provided between two adjacent radiation arms 11 of the radiation unit 10. The isolation slot 18 is arranged parallel to the edge 13 between the two radiation arms 11. The isolation slot 18 is arranged in the middle of the two radiation arms 11, corresponding to the separation slot 17 between the two radiation arms 11. The isolation slot 18 is also provided with an opening on the corresponding edge 13. The opening extends in the same direction as the separation slot 17 between the two radiation arms 11, so that the isolation slot 18 forms an open structure. When the isolation slot 18 and the opening are both rectangular, the isolation slot 18 and the opening form a T-shaped slot 181 structure.

[0059] Combination Figure 2 and Figure 3 , the radiation unit 10 is provided with four feeding pins 14, and the four feeding pins 14 correspond to the four radiation arms 11 of the radiation unit 10 respectively. The feeding pins 14 are arranged under the back of the radiation arm 11, and the feeding pins 14 are connected to the edge of the sunken groove 16 of the radiation arm 11. Specifically, one end of the feeding pin 14 is connected to the edge of the sunken groove 16 of the radiation arm 11, and the other end is used to connect to the external feeding end. In one embodiment, the end of the feeding pin 14 connected to the edge of the sunken groove 16 is bent into a feeding plate 141 parallel to the sunken groove 16 for electrical connection; the end of the feeding pin 14 connected to the external feeding end is bent into a mounting plate 142 parallel to the radiation surface of the radiation unit 10, so that the feeding pin 14 is supported on the external feeding end.

[0060] In one embodiment, the feeding plate 141 of the feeding pin 14 is connected to the edge of the sunken groove 16 of the radiating arm 11 close to the edge of another radiating arm 11 of the same polarization, or the feeding plate 141 of the feeding pin 14 is connected to the edge of the sunken groove 16 of the radiating arm 11 close to the corner end 15. Preferably, the feeding plate 141 of the feeding pin 14 is connected to the edge of the sunken groove 16 of the radiating arm 11 close to the edge of another radiating arm 11 of the same polarization, thereby making the structure of the radiating unit 10 more compact, facilitating the miniaturization of the radiating unit 10, and when the feeding plate 141 of the feeding pin 14 of the radiating unit 10 is electrically connected to the differential feeding network 20, the bent feeding plate 141 is conducive to the layout of the differential feeding network 20.

[0061] The radiation unit 10 is an integrally formed structure, which is convenient for manufacturing and bending the feed pin 14. In a typical embodiment of the present invention, the radiation unit 10 can be formed by sheet metal stamping, so that the radiation unit 10 is integrally formed. When manufacturing the feed pin 14, the radiation arm 11 is punched to form the inner recessed groove 16, and the material of the punched radiation arm 11 to form the inner recessed groove 16 is used to form the feed pin 14 corresponding to the radiation arm 11, so that the radiation unit 10 can be integrally formed. Among them, the portion where the feed pin 14 is connected to the inner recessed groove 16 is the material remaining when the radiation arm 11 is punched, that is, the portion where the feed pin 14 is connected to the inner recessed groove 16 is not punched, so that the feed pin 14 can be integrally connected to the radiation arm 11. It is also convenient to stamp the radiation arm 11 to form the recessed groove 16 and the feeding pin 14. The connecting portion between the feeding pin 14 and the recessed groove 16 is located at the edge of the recessed groove 16 of the radiation arm 11 close to another radiation arm 11 of the same polarization, or the recessed groove 16 of the radiation arm 11 is close to the edge of the corner end 15. It is convenient for sheet metal stamping.

[0062] Since the feeding pin 14 is formed by punching the sunken groove 16 , the area occupied by the feeding pin 14 is substantially the same as the area occupied by the sunken groove 16 .

[0063] The radiation unit 10 is formed by a sheet metal stamping process and a mold in one step, which is convenient for reducing the production links of the radiation unit 10, reducing errors, reducing production costs, and facilitating large-scale production.

[0064] In one embodiment, the thickness of the radiation arm 11 of the radiation unit 10 is preferably 0.5 mm-1 mm, and the height of the radiation unit 10 is 9.3 mm (0.1λ).

[0065] The present invention also provides an antenna subarray 30, combined with Figure 5 The antenna subarray 30 includes a dielectric plate 19 , a plurality of radiation units 10 as described above and disposed on the dielectric plate 19 , and a differential feeding network 20 disposed on the dielectric plate 19 .

[0066] The dielectric plate 19 includes a reflector plate, a PCB floor and a PCB dielectric plate stacked in sequence, the differential feeding network 20 is arranged on the PCB dielectric plate, and the radiation unit 10 is electrically connected to the differential feeding network 20 through the mounting pieces 142 of its four feeding pins 14 respectively.

[0067] The multiple radiation units 10 of the antenna subarray 30 share the same dielectric board 19 and the differential feeding network 20 , and the multiple radiation units 10 are arranged side by side or in a row.

[0068] In one embodiment, the antenna subarray 30 includes three radiating units 10, and the three radiating units 10 are arranged in a row or side by side to form a 1 / 3 subarray.

[0069] The present invention also provides an antenna array 40, combined with Figure 6 The antenna array 40 includes a plurality of antenna sub-arrays 30 as described above, and the plurality of antenna sub-arrays 30 are arranged side by side. Preferably, the antenna sub-array 30 is a 1 / 3 antenna sub-array 30.

[0070] In summary, the radiation unit of the present invention can be provided with a corner portion bent toward the back side of the radiation unit at the end of each radiation arm of the same polarization far from the other radiation arm, and the corner portion will improve the structural strength of the radiation arm unit and reduce the cross polarization of the radiation unit; an edge for connecting the two corners and bent in the same direction as the corner is provided between two adjacent corners, and the provision of the edge facilitates the miniaturization of the radiation unit and improves the isolation of the radiation unit.

[0071] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions invented in the present invention (but not limited to) to form a technical solution.

[0072] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A radiation unit, in an integrally formed structure, comprising two pairs of radiation arms arranged orthogonally in polarization, each radiation arm having a radiation surface arranged in a coplanar manner, characterized in that: Each radiating arm in the same polarization is provided with a corner portion bent toward the back direction opposite to the radiating surface at its end far from the other radiating arm; along the circumference of the radiating unit, an edge for connecting the two adjacent corner portions is provided between the two adjacent corner portions, and the edge is bent in the same direction as the corner portion; An isolation groove is provided between two adjacent radiation arms, and the isolation groove is arranged parallel to the edge between the two radiation arms. An opening connected to the isolation groove is also provided on the edge to form an open structure, and the isolation groove and the opening form a T-shaped groove structure. The edge has a narrower size relative to the corners connected to it on both sides to form an open groove, and the isolation groove is arranged parallel to the open groove.

2. The radiation unit according to claim 1, characterized in that A recessed groove is provided in the middle of each radiation arm, and the recessed groove extends from the end of the radiation arm toward another radiation arm of the same polarization.

3. The radiation unit according to claim 2, characterized in that The radiation unit comprises four feeding pins corresponding to four radiation arms respectively, one end of each feeding pin is connected to the edge of a corresponding sunken groove, and one end is bent into a mounting plate parallel to the radiation surface.

4. The radiation unit according to claim 3, characterized in that: The feeding pins are all parts formed by bending the radiation unit after the radiation unit is punched to form an inner groove.

5. The radiation unit according to claim 4, characterized in that: The area occupied by the feeding pin is substantially the same as that of the recessed groove.

6. The radiation unit according to claim 1, characterized in that: A separation groove for separating the two adjacent radiation arms is provided between the two radiation arms, and the four separation grooves corresponding to the two pairs of radiation arms are connected to form a cross groove.

7. The radiation unit according to any one of claims 1 to 6, characterized in that: The radiation unit is formed by sheet metal stamping.

8. An antenna subarray, characterized in that: It comprises a dielectric plate and a plurality of radiation units as claimed in any one of claims 1 to 7 arranged on the dielectric plate, wherein a differential feeding network electrically connected to the plurality of radiation units is provided on the dielectric plate so as to feed power to each radiation unit through the differential feeding network.

9. The antenna subarray according to claim 8, characterized in that: The plurality of radiation units are arranged in columns or rows.

10. The antenna subarray according to claim 9, characterized in that: The antenna subarray includes three radiating units, and the three radiating units form a 1 / 3 subarray.

11. An antenna array, characterized in that: It comprises a plurality of antenna sub-arrays as claimed in any one of claims 8 to 10, wherein the plurality of antenna sub-arrays are arranged side by side.

Images