Antenna system

Abstract

The invention relates to an antenna system. The antenna system comprises a phase shifter cavity, at least one radiation unit and a transmission network arranged in the phase shifter cavity. The radiation unit comprises a radiation surface and a balun, and the balun comprises a feed part electrically connected with the radiation surface and a balun ground; the feed part is electrically connected with the transmission network; one feed piece corresponds to one balun ground, the feed piece and the corresponding balun ground form a strip line transmission line, and the balun ground comprises a first feed balun and a second feed balun which are arranged at an interval; the feed part comprises a first feed part and a second feed part which are connected with each other, the first feed part is in coupling connection with the first feed balun of the corresponding balun ground, and the second feed part is electrically connected with the second feed balun of the balun ground; wherein the first feed balun and the second feed balun in each balun ground and the phase shifter cavity are constructed into an integrated part. The antenna system provided by the invention has the advantages of few welding spots, low loss and better intermodulation stability.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an antenna system. Background Art

[0002] In the antenna system, the radiation unit and the phase shifter unit need to be electrically connected, and the grounding requirements must be met while achieving signal transmission. In the antenna system in the current related art, the radiation unit and the phase shifter unit are electrically connected through a cable. Specifically, one end of the cable core is connected to the feed plate of the radiation unit, and the other end is connected to the signal transmission layer of the phase shifter; one end of the cable outer conductor is welded to the feed balun, and the other end is welded to the grounding layer of the phase shifter. However, the solution of this related art has the problems of large loss, many welding points, and poor intermodulation stability. Summary of the invention

[0003] Based on this, it is necessary to provide an antenna system with fewer solder joints, less loss, and better intermodulation stability.

[0004] An embodiment of the present application provides an antenna system, comprising a phase shifter cavity, at least one radiating unit, and a transmission network disposed in the phase shifter cavity;

[0005] The radiation unit includes a radiation surface and a balun, and the balun includes a feeding element electrically connected to the radiation surface and a balun ground;

[0006] The feeder is electrically connected to the transmission network;

[0007] A feeding element corresponds to a balun ground and forms a stripline transmission line with the corresponding balun ground, the balun ground includes a first feeding balun and a second feeding balun arranged at intervals; the feeding element includes a first feeding part and a second feeding part connected to each other, the first feeding part is coupled and connected to the first feeding balun corresponding to the balun ground, and the second feeding part is electrically connected to the second feeding balun of the balun ground;

[0008] The first feeding balun and the second feeding balun in each balun ground are formed as an integrally formed part with the phase shifter cavity.

[0009] In one embodiment, the phase shifter cavity includes a mounting wall, the first feed balun includes two first sub-baluns spaced apart on a first side of the mounting wall, and the second feed balun includes two second sub-baluns spaced apart on the first side of the mounting wall;

[0010] The first feeding portion is located between two first sub-baluns corresponding to the first feeding balun to be coupled with the two first sub-baluns, and the second feeding portion is electrically connected to two second sub-baluns corresponding to the second feeding balun.

[0011] In one embodiment, the first sub-balun and the second sub-balun are both formed as long strips extending in a direction away from the mounting wall.

[0012] In one embodiment, the second feeding portion includes a coupling section, and the coupling section is coupled to a corresponding radiation metal layer on the radiation surface;

[0013] A first end of the coupling section is connected to the first feeding portion, and a second end of the coupling section is electrically connected to two second sub-baluns corresponding to the second feeding balun.

[0014] In one embodiment, the second feeding section further includes a connecting section, which is connected to the second end of the coupling section and is located between two second sub-baluns corresponding to the second feeding section so as to be coupled to the two second sub-baluns.

[0015] In one embodiment, the first feeder is installed between the corresponding two first sub-baluns through a first insulating member; and / or

[0016] The connecting section is installed between the corresponding two second sub-baluns through the second insulating member.

[0017] In one embodiment, the radiation unit is a dual-polarization radiation unit; the number of the balun ground and the number of the feeding elements are both two, the projections of the coupling sections in the two feeding elements on the installation wall intersect, and the coupling sections are arranged at intervals in the relative directions between the radiation surface and the installation wall.

[0018] In one embodiment, the radiating unit is a dual-polarized radiating unit; the number of the balun ground and the number of the feeding elements are both two; the connection line between the first feeding balun and the second feeding balun of one balun ground is perpendicular to the connection line between the first feeding balun and the second feeding balun of the other balun ground; or

[0019] The radiation unit is a single-polarization radiation unit; the number of the balun ground and the feeding element are both one, and the connection line of the first feeding balun of the balun ground and the second feeding balun is in the 0° direction.

[0020] In one of the embodiments, at least two coupling elements are provided on a side of the radiation surface facing the feeding balun, and a first feeding balun and a second feeding balun of at least one balun ground are coupled to the radiation surface through the coupling elements.

[0021] In one embodiment, each balun ground is coupled to the radiating surface through a coupling member.

[0022] A part of the coupling elements is coupled to the first feeding balun in a one-to-one correspondence, and another part of the coupling elements is coupled to the second feeding balun in a one-to-one correspondence;

[0023] The coupling element is located at opposite sides of the two corresponding first sub-baluns; and / or the coupling element is located at opposite sides of the two corresponding second sub-baluns.

[0024] In one embodiment, the coupling element is constructed as a sheet-like structure punched out from the radiation surface.

[0025] In one of the embodiments, there are multiple radiation units, and the multiple radiation units are arranged at intervals along the first direction;

[0026] In a plurality of radiation units, feeders with the same polarization direction are all connected to different output ends of the same transmission network; the number of transmission networks is the same as the number of feeders included in one radiation unit.

[0027] Beneficial effects of the above antenna system:

[0028] The signal connection between the radiation unit and the transmission network is realized by electrically connecting the feeder to the transmission network. The first feed balun and the second feed balun in each balun ground are constructed as an integral part with the phase shifter cavity to realize the common ground of the balun ground and the phase shifter cavity. The balun ground and the phase shifter cavity do not need to be welded, thereby reducing the number of welding points, and no electroplating is required. The structure is simple, the loss is low, and the intermodulation stability of the antenna system is also better. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of an antenna system provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the connection structure between the radiation unit and the phase shifter cavity in the antenna system provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the decomposed structure of the antenna system provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the decomposed structure of the antenna system provided in an embodiment of the present application from another angle;

[0033] Figure 5 A schematic diagram of the connection structure between the feeder and the transmission network in the antenna system provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of the antenna system provided in an embodiment of the present application from another angle.

[0035] Description of Figure Numbers:

[0036] 100. Antenna system;

[0037] 10, radiating unit; 101, balun; 102, balun ground; 20, radiating surface; 30, feeder; 31, first feeder; 32, second feeder; 321, coupling section; 322, connecting section; 40, coupling; 41, operating port; 42, through hole; 50, balun ground; 51, first feeder balun; 510, first sub-balun; 52, second feeder balun; 520, second sub-balun;

[0038] 61. Phase shifter cavity; 610. Mounting wall; 63. Transmission network; F. First direction. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0045] The antenna system according to the embodiment of the present application is described below with reference to the accompanying drawings.

[0046] Figure 1 A schematic diagram of the structure of an antenna system provided in an embodiment of the present application; Figure 2 A schematic diagram of the connection structure between the radiation unit and the phase shifter cavity in the antenna system provided in an embodiment of the present application; Figure 3 A schematic diagram of the decomposed structure of the antenna system provided in an embodiment of the present application; Figure 4 A schematic diagram of the decomposed structure of the antenna system provided in an embodiment of the present application from another angle; Figure 5 A schematic diagram of the connection structure between the feeder and the transmission network in the antenna system provided in an embodiment of the present application; Figure 6 A schematic diagram of the antenna system provided in an embodiment of the present application from another angle.

[0047] Reference Figure 1 , Figure 2 , Figure 3The antenna system 100 of the embodiment of the present application includes a phase shifter cavity 61, at least one radiation unit 10, and a transmission network 63 arranged in the phase shifter cavity 61.

[0048] The radiation unit 10 includes a radiation surface 20 and a balun 101. The balun 101 includes a feeder 30 and a balun ground 50 electrically connected to the radiation surface 20. The feeder 30 is electrically connected to the transmission network 63. One feeder 30 corresponds to one balun ground 50, and forms a stripline transmission line with the corresponding balun ground 50. The balun ground 50 includes two first feed baluns 51 and second feed baluns 52 arranged at intervals. The feeder 30 includes a first feeder 31 and a second feeder 32 connected to each other. The first feeder 31 is coupled to the first feeder 51 of the corresponding balun ground 50, and the second feeder 32 is electrically connected to the second feeder 52 of the balun ground 50. The first feeder 51 and the second feeder 52 in each balun ground 50 are constructed as an integrally formed part with the phase shifter cavity 61.

[0049] The feeder 30 is electrically connected to the transmission network 63 to realize the signal connection between the radiation unit 10 and the transmission network 63. The first feed balun 51 and the second feed balun 52 in each balun ground 50 are constructed as an integrally formed part with the phase shifter cavity 61 to realize the common ground of each balun ground 50 and the phase shifter cavity 61. The balun ground 50 and the phase shifter cavity 61 do not need to be welded, thereby reducing the number of welding points in the antenna system, and no electroplating is required. The structure is simple and the loss is low, which also makes the intermodulation stability of the antenna system 100 better.

[0050] The first feed balun 51 and the second feed balun 52 are integrally formed with the phase shifter cavity 61, which means that the first feed balun 51 and the second feed balun 52 and the phase shifter cavity 61 are integrally formed without any external components for auxiliary connection. The integral forming can be realized by die casting, extrusion and other processes, for example.

[0051] In a specific implementation, the electrical connection between the feed element 30 and the radiation surface 20 may be, for example, a coupling connection, and the electrical connection between the balun ground 50 and the radiation surface 20 may be a coupling connection or a direct contact electrical connection, such as a welding connection. In the embodiment of the present application, the electrical connection between the balun ground 50 and the radiation surface 20 is a coupling connection as an example for explanation. At this time, the phase shifter cavity 61 may be installed on the reflector before the radiation surface 20 is coupled to the balun ground 50, so that the assembly of the antenna system is relatively simple.

[0052] Furthermore, the feeding element 30 and the balun ground 50 are actually electrically connected to the corresponding radiation metal layers on the radiation surface 20 , respectively.

[0053] In addition, the second feeding portion 32 of the feeding element 30 can be directly connected (for example, welded) or coupled to the second feeding balun 52 of the balun ground 50. In the embodiment of the present application, the coupling connection between the second feeding portion 32 and the corresponding second feeding balun 52 is taken as an example for description.

[0054] Further, in the embodiment of the present application, the radiation unit 10 may be a dual-polarization radiation unit or a single-polarization radiation unit. In the following example, the antenna system 100 is described in detail by taking the radiation unit 10 as a dual-polarization radiation unit and the number of the feeding elements 30 as two.

[0055] The electrical connection between the feeder 30 and the transmission network 63, combined with Figure 3 and Figure 5 For example, part of the structure of the feeder 30 may penetrate the cavity wall of the phase shifter cavity 61 and extend into the phase shifter cavity 61 so as to be welded and connected with the corresponding transmission network 63. Accordingly, an operation port 41 needs to be opened on the side wall of the phase shifter cavity 61 to facilitate the welding operation.

[0056] In the embodiment of the present application, the number of the radiation unit 10 is one or more. When the number of the radiation unit 10 is one, taking the dual-polarized radiation unit as an example, the number of the transmission networks 63 is two, and the first feeding parts 31 of the two feeding elements 30 both penetrate the wall of the phase shifter cavity 61 and enter the phase shifter cavity 61, and are respectively electrically connected to one transmission network 63. When the number of the radiation unit 10 is one (not shown), taking the single-polarized radiation unit as an example, the number of the transmission network 63 is one, and the first feeding part 31 of one feeding element 30 penetrates the wall of the phase shifter cavity 61 and enters the phase shifter cavity 61, thereby being electrically connected to the one transmission network 63.

[0057] Combination Figure 1 and Figure 3 When the number of the radiation units 10 is multiple, the multiple radiation units 10 are arranged at intervals along the first direction F. The number of transmission networks 63 is the same as the number of feeders 30 included in one radiation unit 10. For example, when the radiation unit 10 is a dual-polarization radiation unit, the number of feeders 30 and transmission networks 63 are both two. In this case, each transmission network 63 has multiple output terminals, and the number of output terminals is the same as the number of radiation units 10. In this way, in the multiple radiation units 10, the feeders 30 with the same polarization direction are all connected to different output terminals of the same transmission network 63, for example, referring to Figure 1 , for the five feeders 30 with a positive polarization direction of 45° among the five radiation units 10, they can be connected to the five output ends of the transmission network 63 on the left side of the figure, and for the five feeders 30 with a negative polarization direction of 45° among the five radiation units 10, they can be connected to the five output ends of the transmission network 63 on the right side of the figure. Of course, Figure 1 An example is given for describing the number of radiation units 10 being five. The cases where the number of radiation units 10 is other than five are similar and will not be described in detail herein.

[0058] When the radiation unit 10 is a single-polarization radiation unit, the number of the feeder 30 and the transmission network 63 are both one (not shown). At this time, each transmission network 63 has multiple output ends, and the number of the output ends is the same as the number of the radiation units 10. In this way, the feeders 30 in each radiation unit 10 are connected to different output ends of the one transmission network 63. For example, the five feeders 30 in the five radiation units 10 can be connected to the five output ends on the transmission network 63. Of course, the case where the number of the radiation units 10 is other is similar to this, and will not be repeated here.

[0059] In the present application, continue to refer to Figure 4 The phase shifter cavity 61 includes a mounting wall 610 . In the same balun ground 50 , the first feeding balun 51 includes two first sub-baluns 510 spaced apart on a first side of the mounting wall 610 , and the second feeding balun 52 includes two second sub-baluns 520 spaced apart on a first side of the mounting wall 610 .

[0060] The first feeding portion 31 is located between two first sub-baluns 510 corresponding to the first feeding balun 51 to be coupled to the two first sub-baluns 510 , and the second feeding portion 32 is electrically connected to two second sub-baluns 520 corresponding to the second feeding balun 52 .

[0061] In specific implementation, a through hole 42 is provided on the mounting wall 610 at a position corresponding to the feeding component 30 . The through hole 42 is located between the two first sub-baluns 510 . The first feeding part 31 can pass through the through hole 42 to be electrically connected to the output end of the corresponding transmission network 63 .

[0062] In the embodiment of the present application, the first sub-balun 510 and the second sub-balun 520 are both formed as long strips extending in a direction away from the mounting wall 610. Such a configuration facilitates the first sub-balun 510, the second sub-balun 520 and the phase shifter cavity 61 to be integrally formed.

[0063] Furthermore, combined with Figure 4 and Figure 5 The second feeding portion 32 includes a coupling section 321 , and the coupling section 321 is coupled to the corresponding radiation metal layer on the radiation surface 20 .

[0064] One end of the coupling section 321 is connected to the first feeding portion 31 , and the other end of the coupling section 321 is electrically connected to two second sub-baluns 520 corresponding to the second feeding balun 52 .

[0065] Such arrangement enables the feeding element 30 to have a sufficient coupling area when coupled to the radiation surface 20 . In specific implementation, the coupling section 321 can be arranged parallel to the radiation surface 20 .

[0066] Of course, in some embodiments, the second feeding portion 32 only includes the coupling section 321 , so the second end of the coupling section 321 may be electrically connected to the two second sub-baluns 520 corresponding to the second feeding balun 52 by direct connection or coupling connection.

[0067] In other embodiments, referring to Figure 4 and Figure 5 , the second feeding part 32 also includes a connecting section 322, the connecting section 322 is connected to the second end of the coupling section 321, and is located between the two second sub-baluns 520 corresponding to the second feeding part 32, so as to be coupled and connected with the two second sub-baluns 520. Such a configuration facilitates the electrical connection between the two second sub-baluns 520 and the coupling section 321. In some other embodiments, the connecting section 322 may be welded and connected to the corresponding two second sub-baluns 520. It should be noted that the length of the connecting section 322 is less than the length of the first feeding part 31, and the connecting section 322 is actually suspended above the mounting wall 610 and does not contact the mounting wall 610. It should be noted that when the distance between the connecting section 322 and the corresponding two second sub-baluns 520 is equal, a stripline structure is formed, and when the distance between the connecting section 322 and the corresponding two second sub-baluns 520 is unequal, a microstrip line structure is formed.

[0068] Further, the first feeder 31 is installed between the corresponding two first sub-baluns 510 through a first insulating member (not shown). For example, the first feeder 31 is snap-connected to the first insulating member. In addition, the connecting section 322 is installed between the corresponding two second sub-baluns 520 through a second insulating member (not shown), for example, the connecting section 322 is snap-connected to the second insulating member. Here, the first insulating member and the second insulating member may be, for example, plastic members.

[0069] With such configuration, the first feeding portion 31 can be mechanically positioned on the two first sub-baluns 510 , and the connecting section 322 can be mechanically positioned on the two second sub-baluns 520 .

[0070] In the present application, refer to Figure 3 When the radiation unit 10 is a dual-polarization radiation unit, the number of the balun ground 50 and the number of the feeder 30 are both two. For easy observation, the two feeders 30 are split to the right according to the black solid arrows. Each of the two feeders 30 corresponds to a balun ground 50. The projections of the coupling sections 321 in the two feeders 30 on the mounting wall 610 intersect, and are arranged at intervals in the relative direction of the radiation surface 20 and the mounting wall 610. In this way, the insulation of the two feeders 30 can be achieved.

[0071] Further, the connection line between the first feeding balun 51 and the second feeding balun 52 of one balun ground 50 is perpendicular to the connection line between the first feeding balun 51 and the second feeding balun 52 of the other balun ground 50. In other words, the two balun grounds 50 are located at mutually orthogonal positions, so that the extension directions of the two coupling sections 321 are perpendicular. It should be noted that the shapes of the two coupling sections 321 can be exactly the same so as to have the same coupling area with the radiation surface 20.

[0072] When the radiation unit 10 is a single-polarization radiation unit, the number of the balun ground 50 and the feeding element 30 are both one, and the connection line between the first feeding balun 51 and the second feeding balun 52 of the balun ground 50 is in the 0° direction.

[0073] In the present application, continue to refer to Figure 4 At least two coupling elements 40 are provided on the side of the radiation surface 20 facing the balun 101, and the first feeding balun 51 and the second feeding balun 52 of at least one balun ground 50 are coupled to the radiation surface 20 through the coupling elements 40. When each balun ground 50 is coupled to the radiation surface 20, a part of the coupling elements 40 is coupled to the first feeding balun 51 in a one-to-one correspondence, and another part of the coupling elements 40 is coupled to the second feeding balun 52 in a one-to-one correspondence.

[0074] Such arrangement makes the radiation unit 10 an open radiation unit, which is convenient for assembly and connection between the mounting wall 610 and the reflector. In specific implementation, as long as a mounting hole is opened on the reflector, the feeder 30 is first mounted on the balun ground 50, and then the balun ground 50 is passed through the mounting hole, and then the radiation surface 20 is coupled to the balun ground 50 through the coupling member 40 to realize the assembly of the antenna system 100. The assembly is simple and the consistency is good.

[0075] In the present application embodiment, combined Figure 4 and Figure 6 When specifically connected, the coupling element 40 is located at the opposite sides of the corresponding two first sub-baluns 510. And / or, the coupling element 40 is located at the opposite sides of the corresponding two second sub-baluns 520. For example, the two coupling elements 40 corresponding to the two first feeding baluns 51 are located at the opposite sides of the two first feeding baluns 51, and the two coupling elements 40 corresponding to the two second feeding baluns 52 are located at the opposite sides of the two second feeding baluns 52.

[0076] In a specific implementation, the mechanical connection between the coupling member 40 and the first feeding balun 51 is achieved through the first insulating member, and the mechanical installation between the coupling member 40 and the second feeding balun 52 is achieved through the second insulating member.

[0077] In addition, the coupling member 40 is constructed as a sheet structure punched from the radiation surface 20. This makes the processing of the coupling member 40 simpler. In specific implementation, four coupling members 40 are punched out of the radiation surface 20.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An antenna system, characterized in that: It comprises a phase shifter cavity, at least one radiation unit, and a transmission network arranged in the phase shifter cavity; The radiation unit includes a radiation surface and a balun, and the balun includes a feeding element and a balun ground electrically connected to the radiation surface; The feeder is electrically connected to the transmission network; A feeding element corresponds to a balun ground and forms a stripline transmission line with the corresponding balun ground, wherein the balun ground includes two first feeding baluns and a second feeding balun arranged at intervals; the feeding element includes a first feeding portion and a second feeding portion connected to each other, wherein the first feeding portion is coupled and connected to the first feeding balun corresponding to the balun ground, and the second feeding portion is electrically connected to the second feeding balun of the balun ground; Wherein, the first feeding balun and the second feeding balun in each of the balun grounds are constructed as an integrally formed part with the phase shifter cavity.

2. The antenna system according to claim 1, characterized in that The phase shifter cavity includes a mounting wall, the first feed balun includes two first sub-baluns spaced apart on a first side of the mounting wall, and the second feed balun includes two second sub-baluns spaced apart on the first side of the mounting wall; The first feeding portion is located between two first sub-baluns corresponding to the first feeding balun to be coupled to the two first sub-baluns, and the second feeding portion is electrically connected to two second sub-baluns corresponding to the second feeding balun.

3. The antenna system according to claim 2, characterized in that: The first sub-balun and the second sub-balun are both formed as long strips extending in a direction away from the mounting wall.

4. The antenna system according to claim 2, characterized in that The second feeding portion comprises a coupling section, and the coupling section is coupled and connected with a corresponding radiation metal layer on the radiation surface; A first end of the coupling section is connected to the first feeding portion, and a second end of the coupling section is electrically connected to two second sub-baluns corresponding to the second feeding balun.

5. The antenna system according to claim 4, characterized in that: The second feeding section further includes a connecting section, which is connected to the second end of the coupling section and is located between two second sub-baluns corresponding to the second feeding section so as to be coupled to the two second sub-baluns.

6. The antenna system according to claim 5, characterized in that: The first feeder is installed between the corresponding two first sub-baluns through a first insulating member; and / or The connecting section is installed between the corresponding two second sub-baluns through a second insulating member.

7. The antenna system according to claim 5, characterized in that: The radiation unit is a dual-polarization radiation unit; the number of the balun ground and the number of the feeders are both two, the projections of the coupling sections in the two feeders on the installation wall intersect, and the coupling sections are arranged at intervals in the relative direction between the radiation surface and the installation wall.

8. The antenna system according to any one of claims 1 to 6, characterized in that: The radiation unit is a dual-polarization radiation unit; the number of the balun ground and the number of the feeding elements are both two; the connection line between the first feeding balun and the second feeding balun of one of the balun grounds is perpendicular to the connection line between the first feeding balun and the second feeding balun of another of the balun grounds; or The radiation unit is a single-polarization radiation unit; the number of the balun ground and the number of the feeding element are both one, and the connection line between the first feeding balun and the second feeding balun of the balun ground is in the 0° direction.

9. The antenna system according to claim 2, characterized in that: At least two coupling components are provided on a side of the radiation surface facing the feeding balun, and the first feeding balun and the second feeding balun of at least one of the balun grounds are coupled to the radiation surface through the coupling components.

10. The antenna system according to claim 9, characterized in that Each of the balun grounds is coupled to the radiating surface through the coupling element. A part of the coupling elements is coupled to the first feeding balun in a one-to-one correspondence, and another part of the coupling elements is coupled to the second feeding balun in a one-to-one correspondence; The coupling element is located at opposite sides of the corresponding two first sub-baluns; And / or, the coupling element is located at opposite sides of the corresponding two second sub-baluns.

11. The antenna system according to claim 9, characterized in that The coupling element is constructed as a sheet-like structure punched from the radiation surface.

12. The antenna system according to any one of claims 1 to 6, characterized in that: There are multiple radiation units, and the multiple radiation units are arranged at intervals along the first direction; In the plurality of radiation units, the feeders with the same polarization direction are all connected to different output ends of the same transmission network; and the number of the transmission networks is the same as the number of the feeders included in one radiation unit.

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