Multifrequency antenna

Abstract

The application relates to a multi-frequency antenna, which comprises a reflecting plate, a high-frequency radiation unit, a high-frequency feeding system, a low-frequency radiation unit and a low-frequency feeding system. The high-frequency feeding system comprises a high-frequency feeding cavity and a high-frequency feeding network arranged in the high-frequency feeding cavity. The high-frequency feeding network is electrically connected with the high-frequency radiation unit. The low-frequency feeding system comprises a low-frequency feeding cavity and a low-frequency feeding network arranged in the low-frequency feeding cavity, and the low-frequency feeding network is electrically connected with the low-frequency radiation unit. Since the high-frequency feeding cavity and the low-frequency feeding cavity are respectively arranged on the front surface and the back surface of the reflecting plate, sufficient space is provided without mutual influence. The arrangement structure is compact, the space of the front surface and the back surface of the reflecting plate is fully utilized, the width and the height of the antenna are greatly compressed, the high integration of the multi-frequency antenna is realized, efficient production, compact structure, high integration and miniaturization can be realized.

Description

Technical Field

[0001] This application relates to the field of antenna communication technology, and in particular to a multi-frequency antenna. Background Technology

[0002] With the rapid development of mobile communication networks, multi-frequency shared antennas have become the mainstream of base station antennas. In existing multi-frequency base station antennas, the radiating element and the feed network are generally connected by coaxial cable. Due to the large number of frequency bands, the cable routing is very complicated, which occupies a lot of space, resulting in a very compact antenna layout, difficult assembly, low production efficiency, high cable loss, and low antenna efficiency. Summary of the Invention

[0003] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a multi-frequency antenna that can achieve high-efficiency production, compact structure, high integration, and miniaturization.

[0004] The technical solution is as follows: a multi-frequency antenna, the multi-frequency antenna comprising:

[0005] Reflector;

[0006] A high-frequency radiating unit and a high-frequency power supply system for powering the high-frequency radiating unit;

[0007] A low-frequency radiating unit and a low-frequency power supply system for powering the low-frequency radiating unit;

[0008] The high-frequency radiation unit and the low-frequency radiation unit are spaced apart on the front side of the reflector. The high-frequency power supply system includes a high-frequency power supply cavity, and the low-frequency power supply system includes a low-frequency power supply cavity. The high-frequency power supply cavity and the low-frequency power supply cavity are respectively located on the front and back sides of the reflector.

[0009] In one embodiment, the high-frequency feeding cavity and the low-frequency feeding cavity partially overlap at their projections perpendicular to the surface of the reflector.

[0010] In one embodiment, the width and length directions of the high-frequency feeding cavity are both parallel to the reflector; and / or, the width and length directions of the low-frequency feeding cavity are both parallel to the reflector.

[0011] In one embodiment, the high-frequency radiation unit is a dual-polarized high-frequency radiation unit, which includes two first feeding elements; the high-frequency feeding cavity includes two connected first cavities arranged sequentially along the width direction of the high-frequency feeding cavity; the high-frequency feeding system further includes a high-frequency feeding network, which includes two first feeding networks respectively disposed inside the two first cavities, with the two first feeding elements extending through into the two first cavities and electrically connected to the corresponding two first feeding networks; and / or

[0012] The low-frequency radiation unit is a dual-polarized low-frequency radiation unit, which includes two second feeding elements; the low-frequency feeding cavity includes two connected second cavities, which are arranged sequentially along the width direction of the low-frequency feeding cavity; the low-frequency feeding system also includes a low-frequency feeding network, which includes two second feeding networks respectively disposed inside the two second cavities, and the two second feeding elements respectively penetrate into the two second cavities and are electrically connected to the corresponding two second feeding networks.

[0013] In one embodiment, the high-frequency radiation unit further includes a high-frequency radiator, with two first feeding elements coupled to the high-frequency radiator for power feeding; and / or, the low-frequency radiation unit further includes a low-frequency radiator, with two second feeding elements coupled to the low-frequency radiator for power feeding; and / or, the high-frequency feeding network is parallel to the reflector; and / or, the low-frequency feeding network is parallel to the reflector.

[0014] In one embodiment, the high-frequency feeding cavity, the reflector, and the low-frequency feeding cavity are an integrated structure, formed by integral extrusion molding.

[0015] In one embodiment, the high-frequency feeding cavity is connected to the reflector via a first metal locking member, and the low-frequency feeding cavity is connected to the reflector via a second metal locking member.

[0016] In one embodiment, the high-frequency feeding cavity is connected to the reflector via a first insulating member, thereby isolating the high-frequency feeding cavity from the reflector; and / or, the low-frequency feeding cavity is connected to the reflector via a second insulating member, thereby isolating the low-frequency feeding cavity from the reflector.

[0017] In one embodiment, the high-frequency radiation unit further includes a high-frequency radiator, which is connected to the high-frequency feeding cavity via a common ground; and / or, the low-frequency radiation unit further includes a low-frequency radiator, which is connected to the low-frequency feeding cavity via a common ground, and the reflector is provided with an insulating hole corresponding to the low-frequency radiator, and the low-frequency radiator passes through the insulating hole.

[0018] In one embodiment, the high-frequency power supply network and the low-frequency power supply network are metal conductor air strips or PCB power supply boards.

[0019] In one embodiment, there are multiple high-frequency radiation units, which are arranged sequentially along the length of the high-frequency feeding cavity to form a high-frequency array;

[0020] The low-frequency radiation unit is a plurality of units, which are arranged sequentially along the length of the low-frequency feeding cavity to form a low-frequency array.

[0021] The aforementioned multi-frequency antenna, with its high-frequency and low-frequency feeding cavities located on the front and back of the reflector respectively, has sufficient space to avoid interference with each other. This compact structure makes full use of the space on the front and back of the reflector, greatly reducing the width and height of the antenna and achieving high integration of the multi-frequency antenna. It enables efficient production, compact structure, high integration, and miniaturization. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a multi-frequency antenna according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 Another perspective structural diagram of the structure shown;

[0026] Figure 3 This is a schematic diagram of the structure of a multi-frequency antenna according to another embodiment of the present invention;

[0027] Figure 4This is a schematic diagram of the structure of a multi-frequency antenna according to another embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a multi-frequency antenna according to another embodiment of the present invention;

[0029] Figure 6 for Figure 5 A schematic diagram of the structure from another perspective.

[0030] 10. Reflector; 20. High-frequency radiating element; 21. High-frequency radiator; 22. First feed element; 30. High-frequency feed system; 31. High-frequency feed cavity; 311. First metal isolation plate; 312. First cavity; 32. High-frequency feed network; 40. Low-frequency radiating element; 41. Low-frequency radiator; 42. Second feed element; 50. Low-frequency feed system; 51. Low-frequency feed cavity; 511. Second metal isolation plate; 512. Second cavity; 52. Low-frequency feed network; 100. Antenna subarray; 110. High-frequency array; 120. Low-frequency array. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a multi-frequency antenna according to an embodiment of the present invention is shown. Figure 2 It shows Figure 1 The diagram shows another perspective view of the structure. One embodiment of this application provides a multi-frequency antenna, comprising: a reflector 10, a high-frequency radiating element 20, a high-frequency feeding system 30, a low-frequency radiating element 40, and a low-frequency feeding system 50. The high-frequency radiating element 20 is connected to the high-frequency feeding system 30, which powers the high-frequency radiating element 20. Specifically, the high-frequency feeding system 30 includes a high-frequency feeding cavity 31 and a high-frequency feeding network 32 disposed inside the high-frequency feeding cavity 31. The low-frequency radiating element 40 is connected to the low-frequency feeding system 50, which powers the low-frequency radiating element 40. Specifically, the low-frequency feeding system 50 includes a low-frequency feeding cavity 51 and a low-frequency feeding network 52 disposed inside the low-frequency feeding cavity 51. The high-frequency feeding cavity 31 and the low-frequency feeding cavity 51 are respectively located on the front and back sides of the reflector 10.

[0033] It should be noted that the front and back sides of the reflector 10 are two opposite sides of the reflector 10. The front side refers to the side of the reflector 10 facing the high-frequency radiation unit 20, and the back side refers to the side of the reflector 10 facing away from the high-frequency radiation unit 20.

[0034] The aforementioned multi-frequency antenna, with the high-frequency feeding cavity 31 and the low-frequency feeding cavity 51 located on the front and back of the reflector 10 respectively, has sufficient space without interfering with each other. This arrangement is compact, makes full use of the space on the front and back of the reflector 10, greatly compresses the width and height of the antenna, and achieves high integration of the multi-frequency antenna. It can achieve high-efficiency production, compact structure, high integration and miniaturization.

[0035] Please see Figure 1 and Figure 2 In one embodiment, the high-frequency feeding cavity 31 is disposed on the front side of the reflector 10, and the low-frequency feeding cavity 51 is disposed on the back side of the reflector 10. In this way, the space on the front and back sides of the reflector 10 is fully utilized, greatly compressing the width and height of the antenna, achieving high integration of the multi-frequency antenna, and realizing miniaturization.

[0036] Please see Figure 1 and Figure 2 In one embodiment, the high-frequency feeding cavity 31 and the low-frequency feeding cavity 51 partially overlap at their projections perpendicular to the surface of the reflector 10. This fully utilizes the space on the front and back of the reflector 10, significantly reducing the width and height of the antenna, achieving high integration of the multi-frequency antenna, and miniaturization.

[0037] Please see Figure 1 and Figure 2 In one embodiment, the width direction of the high-frequency feeding cavity 31 (e.g., Figure 1 (as shown by the double arrow b) and the length direction (as shown by...) Figure 2 As indicated by the double arrow L in the diagram, which represents the arrangement direction of the multiple high-frequency radiating units 20, they are all parallel to the reflector 10. Thus, the high-frequency feeding network 32 disposed inside the high-frequency feeding cavity 31 is also correspondingly parallel to the reflector 10; and / or, the width direction of the low-frequency feeding cavity 51 (as shown by the double arrow L in the diagram) is also parallel to the reflector 10. Figure 1 (as shown by the double arrow b) and the length direction (as shown by...) Figure 2 As indicated by the double arrow L (i.e., the arrangement direction of the multiple low-frequency radiating units 40), they are all parallel to the reflector 10. Thus, the low-frequency feeding network 52 arranged inside the low-frequency feeding cavity 51 is also correspondingly parallel to the reflector 10. In this way, the high-frequency feeding cavity 31 is arranged horizontally, with its height direction (e.g., ...) parallel to the reflector 10. Figure 1The double arrows (h) in the diagram only occupy the narrow side of the cavity rectangle, thus reducing the height compared to the vertical placement of the cavity (i.e., the arrangement where the width direction of the high-frequency feeding cavity 31 is perpendicular to the reflector 10, or the arrangement where the high-frequency feeding network 32 is perpendicular to the surface of the reflector 10). Similarly, the horizontally arranged low-frequency feeding cavity 51 only occupies the narrow side of the cavity rectangle in the height direction, further reducing the height compared to the vertical placement of the cavity (i.e., the arrangement where the width direction of the low-frequency feeding cavity 51 is perpendicular to the reflector 10, or the arrangement where the low-frequency feeding network 52 is perpendicular to the surface of the reflector 10). This significantly reduces the antenna height, achieving high integration of the multi-frequency antenna and miniaturization.

[0038] Please see Figure 1 In one embodiment, the high-frequency radiation unit 20 is a dual-polarized high-frequency radiation unit 20, which includes two first feed elements 22. The high-frequency feed cavity 31 includes two connected first cavities 312, which are located along the width direction of the high-frequency feed cavity 31 (e.g., ...). Figure 1 The high-frequency feed network 32 includes two first feed networks respectively disposed inside the two first cavities 312, and two first feed elements 22 respectively penetrate into the two first cavities 312 and are electrically connected to the corresponding first feed networks. Furthermore, the low-frequency radiation unit 40 is a dual-polarized low-frequency radiation unit 40, which includes two second feed elements 42. The low-frequency feed cavity 51 includes two connected second cavities 512, which are arranged sequentially along the width direction of the low-frequency feed cavity 51. The low-frequency feed network 52 includes two second feed networks respectively disposed inside the two second cavities 512, and two second feed elements 42 respectively penetrate into the two second cavities 512 and are electrically connected to the corresponding second feed networks. Thus, on the one hand, the first power supply component 22 directly penetrates into the first cavity 312 and is electrically connected to the corresponding first power supply network, and the second power supply component 42 directly penetrates into the second cavity 512 and is electrically connected to the corresponding second power supply network. In this way, there is no coaxial cable, resulting in higher production efficiency.

[0039] Understandably, in order to allow the first power supply component 22 to penetrate into the first cavity 312, a first clearance hole corresponding to the first power supply component 22 is provided on the first cavity 312. Furthermore, in order to allow the second power supply component 42 to penetrate into the second cavity 512, a second clearance hole corresponding to the second power supply component 42 is provided on the reflector 10 and the second cavity 512.

[0040] Please see Figure 1 and Figure 2In one embodiment, a first metal isolation plate 311 is provided in the middle part of the high-frequency feeding cavity 31 along the length direction, so that the high-frequency feeding cavity 31 is divided into two first cavities 312; in addition, a second metal isolation plate 511 is provided in the middle part of the low-frequency feeding cavity 51 along the length direction, so that the low-frequency feeding cavity 51 is divided into two second cavities 512.

[0041] Please see Figure 1 and Figure 2 In one embodiment, the high-frequency radiation unit 20 further includes a high-frequency radiator 21, with two first feeding elements 22 coupled to the high-frequency radiator 21 for power feeding. And / or, the low-frequency radiation unit 40 further includes a low-frequency radiator 41, with two second feeding elements 42 coupled to the low-frequency radiator 41 for power feeding. Thus, by using coupled feeding, electroplating can be eliminated for the high-frequency radiator 21 and the low-frequency radiator 41.

[0042] In one embodiment, the high-frequency radiator 21, the low-frequency radiator 41, the reflector 10, the first cavity 312, and the second cavity 512 do not require electroplating and welding, thus making the intermodulation more stable and reliable, the antenna more environmentally friendly, and the production efficiency higher.

[0043] Please see Figure 1 and Figure 2 In one embodiment, the high-frequency feeding cavity 31, the reflector 10, and the low-frequency feeding cavity 51 are an integrated structure, formed by integral extrusion molding. This results in high production efficiency for the high-frequency feeding cavity 31, the reflector 10, and the low-frequency feeding cavity 51, facilitating mass production. Furthermore, this allows for a common ground connection between the three components.

[0044] Please see Figure 3 , Figure 3 A schematic diagram of a multi-frequency antenna according to another embodiment of the present invention is shown. In one embodiment, the high-frequency feeding cavity 31 is connected to the reflector 10 via a first metal locking member (not shown), and the low-frequency feeding cavity 51 is connected to the reflector 10 via a second metal locking member (not shown). Thus, during manufacturing, the high-frequency feeding cavity 31, the reflector 10, and the low-frequency feeding cavity 51 are fabricated separately, i.e., a split design, and then assembled together using the first and second metal locking members, which reduces manufacturing difficulty. Furthermore, after assembly, the high-frequency feeding cavity 31, the reflector 10, and the low-frequency feeding cavity 51 are connected to a common ground. Optionally, the first and second metal locking members may include, but are not limited to, metal screws, metal rivets, etc.

[0045] Please see Figure 4 , Figure 4A schematic diagram of a multi-frequency antenna according to another embodiment of the present invention is shown. In one embodiment, the high-frequency feeding cavity 31 is connected to the reflector 10 through a first insulating member, so that the high-frequency feeding cavity 31 is insulated from the reflector 10; and / or, the low-frequency feeding cavity 51 is connected to the reflector 10 through a second insulating member, so that the low-frequency feeding cavity 51 is insulated from the reflector 10. Thus, on the one hand, in the production process, the high-frequency feeding cavity 31, the reflector 10, and the low-frequency feeding cavity 51 are fabricated separately, i.e., a split design, and then assembled together by the first insulating member and the second insulating member, which reduces the manufacturing difficulty.

[0046] In one embodiment, the high-frequency radiation unit 20 further includes a high-frequency radiator 21. The high-frequency radiator 21 is grounded with the high-frequency feeding cavity 31. And / or, the low-frequency radiation unit 40 further includes a low-frequency radiator 41, which is grounded with the low-frequency feeding cavity 51. The reflector 10 has an insulating hole corresponding to the low-frequency radiator 41, and the low-frequency radiator 41 passes through the insulating hole.

[0047] In one embodiment, the high-frequency feed network 32 and the low-frequency feed network 52 are metal conductor air strips or PCB feed boards. Thus, using metal conductor air strips reduces the losses of the high-frequency feed system 30 and the low-frequency feed system 50, improving the antenna array efficiency.

[0048] Please see Figure 1 and Figure 2 In one embodiment, there are multiple high-frequency radiation units 20, which are arranged sequentially along the length of the high-frequency feeding cavity 31 to form a high-frequency array 110. In addition, there are multiple low-frequency radiation units 40, which are arranged sequentially along the length of the low-frequency feeding cavity 51 to form a low-frequency array 120.

[0049] In one embodiment, a high-frequency array 110 and a low-frequency array 120 are combined to form an antenna subarray 100. The antenna subarray 100 of the multi-frequency antenna includes, but is not limited to, one, two, three, or other various numbers as needed.

[0050] Please see Figure 2 , Figure 5 and Figure 6 , Figure 5 A schematic diagram of the structure of a multi-frequency antenna according to another embodiment of the present invention is shown. Figure 6 It shows Figure 5 The diagram shows another view of the structure. In another embodiment, two high-frequency arrays 110 and a low-frequency array 120 located between the two high-frequency arrays 110 are combined to form an antenna subarray 100. The antenna subarray 100 of the multi-frequency antenna includes, but is not limited to, one (e.g., Figure 2 As shown), two (as shown) Figure 6 (As shown), three, or various other quantities as needed.

[0051] Among them, the high-frequency array 110 and the low-frequency array 120 are along the width direction of the reflector 10 (i.e., as shown in the figure). Figure 1 or Figure 5 The antenna subarrays are arranged sequentially in the direction indicated by the double arrow b. Furthermore, each antenna subarray 100 shares a common reflector 10.

[0052] Please see Figure 5 and Figure 6 In one embodiment, the antenna includes two antenna subarrays 100. The high-frequency operating band of the antenna subarray 100 is 1427MHz-2690MHz, and the low-frequency operating band is 690MHz-960MHz. The width of the multi-frequency antenna is only 400mm, which shows that the width dimension is relatively small.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A multi-frequency antenna, characterized in that, The multi-frequency antenna includes: Reflector; A high-frequency radiating unit and a high-frequency power supply system for powering the high-frequency radiating unit; A low-frequency radiating unit and a low-frequency power supply system for powering the low-frequency radiating unit; The high-frequency radiation unit and the low-frequency radiation unit are spaced apart on the front side of the reflector. The high-frequency power supply system includes a high-frequency power supply cavity, and the high-frequency radiation unit includes a high-frequency radiator. The high-frequency radiator and the high-frequency power supply cavity are connected to the same ground. The low-frequency power supply system includes a low-frequency power supply cavity, and the low-frequency radiation unit includes a low-frequency radiator. The low-frequency radiator and the low-frequency power supply cavity are connected to the same ground. The high-frequency power supply cavity and the low-frequency power supply cavity are respectively located on the front and back sides of the reflector. The high-frequency power supply cavity and the low-frequency power supply cavity partially overlap at their projections perpendicular to the reflector surface. The reflector has an insulating hole corresponding to the low-frequency radiator, and the low-frequency radiator passes through the insulating hole.

2. The multi-frequency antenna according to claim 1, characterized in that, The width and length directions of the high-frequency feeding cavity are both parallel to the reflector.

3. The multi-frequency antenna according to claim 1, characterized in that, The width and length directions of the low-frequency feeding cavity are both parallel to the reflector.

4. The multi-frequency antenna according to claim 1, characterized in that, The high-frequency radiation unit is a dual-polarized high-frequency radiation unit, and the high-frequency radiation unit includes two first feeding elements; the high-frequency feeding cavity includes two connected first cavities, and the two first cavities are arranged sequentially along the width direction of the high-frequency feeding cavity; the high-frequency feeding system further includes a high-frequency feeding network, and the high-frequency feeding network includes two first feeding networks respectively disposed inside the two first cavities, and the two first feeding elements respectively penetrate into the two first cavities and are electrically connected to the corresponding two first feeding networks; and / or The low-frequency radiation unit is a dual-polarized low-frequency radiation unit, which includes two second feeding elements; the low-frequency feeding cavity includes two connected second cavities, which are arranged sequentially along the width direction of the low-frequency feeding cavity; the low-frequency feeding system also includes a low-frequency feeding network, which includes two second feeding networks respectively disposed inside the two second cavities, and the two second feeding elements respectively penetrate into the two second cavities and are electrically connected to the corresponding two second feeding networks.

5. The multi-frequency antenna according to claim 4, characterized in that, The two first feed elements are coupled to the high-frequency radiator; and / or, the two second feed elements are coupled to the low-frequency radiator.

6. The multi-frequency antenna according to claim 4, characterized in that, The high-frequency power supply network is parallel to the reflector.

7. The multi-frequency antenna according to claim 4, characterized in that, The low-frequency power supply network is parallel to the reflector.

8. The multi-frequency antenna according to claim 4, characterized in that, The high-frequency power supply network and the low-frequency power supply network are metal conductor air strips or PCB power supply boards.

9. The multi-frequency antenna according to claim 1, characterized in that, The high-frequency feeding cavity, the reflector, and the low-frequency feeding cavity are an integrated structure, formed by integral extrusion molding.

10. The multi-frequency antenna according to claim 1, characterized in that, The high-frequency feeding cavity is connected to the reflector via a first metal locking member, and the low-frequency feeding cavity is connected to the reflector via a second metal locking member.

11. The multi-frequency antenna according to claim 1, characterized in that, The high-frequency feeding cavity is connected to the reflector through a first insulating member, so that the high-frequency feeding cavity is insulated from the reflector; and / or, the low-frequency feeding cavity is connected to the reflector through a second insulating member, so that the low-frequency feeding cavity is insulated from the reflector.

12. The multi-frequency antenna according to any one of claims 1 to 11, characterized in that, The high-frequency radiation unit is a plurality of units, which are arranged sequentially along the length of the high-frequency feeding cavity to form a high-frequency array; The low-frequency radiation unit is a plurality of units, which are arranged sequentially along the length of the low-frequency feeding cavity to form a low-frequency array.

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