Low-frequency antenna assembly and dual-polarization antenna with wave-transmitting function

Abstract

The present invention provides a low-frequency antenna component and a dual-polarized antenna with a wave-transmitting function, wherein the low-frequency antenna component comprises a dielectric substrate, a radiator circuit and a feeding component, wherein the annular radiator in the radiator circuit is arranged in single-arm segments, and the segmented metal body exhibits low scattering characteristics for high-frequency electromagnetic waves, which can effectively reduce the impact on high-frequency radiation performance. At the same time, in order to ensure the normal operation of the low-frequency antenna component, a short-circuit coaxial line is arranged to connect the metal bodies in sequence, which plays a low-pass and high-resistance role, thereby achieving low-frequency performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of antennas, and in particular relates to a low-frequency antenna component with wave-transmitting function and a dual-polarized antenna. Background Art

[0002] With the rapid development of wireless communications, base station antennas are developing towards multi-frequency, multi-port, and multi-standard. In the 2G era, base station antennas were mainly dual-polarized 2-port antennas, which had a simple antenna structure and were easy to use; in the 3G era, antennas were mainly dual-frequency 4-port antennas, compatible with 2G networks, and the size of the antennas did not increase significantly; in the 4G era, the antenna frequency bands increased further, and it was necessary to support 2G, 3G, and 4G networks at the same time, and it was necessary to use MIMO functions, so the number of antenna ports doubled, and the mainstream demand was for antennas with more than 6 ports; in the 5G era, the frequency bands increased, and site resources were tight. Operators needed to deploy more base station systems at as few sites as possible, which put forward higher requirements for antennas, and fully integrated antennas became the mainstream demand.

[0003] There are two traditional methods to achieve antenna integration. One is to stack and assemble the structure, that is, antennas of different frequency bands and different columns of the same frequency are realized by left-right splicing or up-down splicing. However, no matter which splicing method is used, the size of the antenna will increase, the construction will be difficult and the cost will be high. The increase in the windward area will increase the wind load pressure, affecting the reliability of the antenna. The other is to use the more mature high- and low-frequency coaxial solution. However, the unit spacing of the coaxial solution cannot be combined at will, and the size of the coaxial array cannot be further reduced, especially in TDD (Time Division Duplexing) + FDD (Frequency Division Duplex) multi-system integrated antennas, the coaxial solution is almost impossible to achieve.

[0004] In recent years, cross-shaped and X-shaped radiating units have gradually been used in base station antennas. Such radiating units can achieve flexible array formation and are easy to integrate multiple antennas. However, due to the performance interference of radiating units in different frequency bands, especially the impact of low-frequency radiating units on high-frequency radiation signals, the performance of the radiating units located below the low frequency and being blocked cannot be fully utilized, resulting in a decline in antenna network performance. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a low-frequency antenna assembly to solve the problem of low-frequency radiation units interfering with high-frequency radiation signal performance when multiple antennas are integrated.

[0006] A first aspect of an embodiment of the present invention provides a low-frequency antenna assembly, the low-frequency antenna assembly comprising:

[0007] A dielectric substrate, the dielectric substrate having a first mounting surface and a second mounting surface corresponding to the first mounting surface;

[0008] A radiator circuit, wherein the radiator circuit is laid on the first mounting surface of the dielectric substrate, the radiator circuit comprises two vibrators mounted in orthogonal polarization, each of the vibrators comprises two annular radiator arms arranged diagonally, each of the annular radiator arms comprises a plurality of metal bodies arranged in an annular shape and a short-circuit coaxial line for connecting two adjacent metal bodies;

[0009] Each of the short-circuit coaxial lines comprises an outer conductor and a core line passing through the outer conductor, the core line having a first line end and a second line end opposite to the first line end, the outer conductor having a first end and a second end opposite to the first end, the first line end of the core line is short-circuitedly connected to the first end of the outer conductor, the second end of the outer conductor is passed through the second mounting surface and connected to one of the adjacent metal bodies, and the second line end of the core line passes through the second mounting surface, the first mounting surface and the corresponding metal body in sequence and is connected to another adjacent metal body;

[0010] A feeding component, one end of which is vertically coupled to the two vibrators, and the other end of which is connected to a feeding network.

[0011] In one embodiment, the side length of the radiator line is 0.3λ1-0.35λ1, where λ1 is the wavelength of the low-frequency radiation signal.

[0012] In one embodiment, the length of each of the metal bodies is less than 0.125λ2, where λ2 is the wavelength of the radiation signal to be transmitted.

[0013] In one embodiment, the feeding component includes two PCB circuit boards embedded in an orthogonal structure, one end of each PCB circuit board passes through the second mounting surface and the first mounting surface in sequence and is connected to the corresponding metal body, and the other end is connected to the feeding network.

[0014] In one embodiment, the single arm of the radiator is in a circular ring structure or a square ring structure.

[0015] In one embodiment, the short-circuit coaxial line further includes a metal cap, and the first wire end of the core wire is short-circuited and connected to the first end of the outer conductor through the metal cap.

[0016] A second aspect of an embodiment of the present invention provides a dual-polarized antenna, comprising a reflector and a plurality of high-frequency antenna components, and a low-frequency antenna component with a wave-transmitting function as described above, wherein the end surface of the low-frequency antenna component is higher than the end surface of the high-frequency antenna component, and the high-frequency antenna component and the low-frequency antenna component are arranged on the reflector.

[0017] In one embodiment, the dual-polarized antenna further includes a plurality of intermediate frequency antenna components, and each of the intermediate frequency antenna components and each of the high frequency antenna components are respectively located on two opposite sides of the low frequency antenna component.

[0018] In one embodiment, the metal length of a single arm of the annular radiator in the low frequency antenna assembly close to the intermediate frequency antenna assembly is greater than the metal length of a single arm of the annular radiator in the low frequency antenna assembly close to the high frequency antenna assembly.

[0019] In one embodiment, the reflective plate has a first layout area, two second layout areas located on opposite sides of the first layout area, and two third layout areas respectively located on the side of the second layout area away from the first layout area. The high-frequency antenna components are arranged in parallel in the first layout area, the low-frequency antenna components are arranged in parallel in the second layout area, and the intermediate-frequency antenna components are arranged in parallel in the third layout area.

[0020] The embodiment of the present invention forms a low-frequency antenna assembly by arranging a dielectric substrate, a radiator line and a feeding component to receive a low-frequency radiation signal, wherein the annular radiator is arranged in single-arm segments, and the segmented metal body exhibits low scattering characteristics for high-frequency electromagnetic waves, which can effectively reduce the impact on high-frequency radiation performance. At the same time, in order to ensure the normal operation of the low-frequency antenna assembly, a short-circuit coaxial line is arranged to connect the metal bodies in sequence. The short-circuit coaxial line can be equivalent to an LC parallel resonant circuit, which plays a low-pass and high-resistance role, thereby achieving low-frequency performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a first structure of a low-frequency antenna assembly provided by an embodiment of the present invention;

[0022] Figure 2 A second structural schematic diagram of a low-frequency antenna assembly provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a first structure of a short-circuited coaxial line in a low-frequency antenna assembly provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of an equivalent circuit of a short-circuited coaxial line in a low-frequency antenna assembly provided by an embodiment of the present invention;

[0025] Figure 5A schematic structural diagram of a feeding component in a low-frequency antenna assembly provided in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a second structure of a short-circuited coaxial line in a low-frequency antenna assembly provided by an embodiment of the present invention;

[0027] Figure 7 A third structural schematic diagram of a low-frequency antenna assembly provided by an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a first structure of a dual-polarized antenna provided in an embodiment of the present invention;

[0029] Fig. 9 A second structural schematic diagram of a dual-polarized antenna provided in an embodiment of the present invention;

[0030] Fig.10 A fourth structural schematic diagram of a low-frequency antenna assembly provided in an embodiment of the present invention.

[0031] In the figure: 10. dielectric substrate, 20. radiator line, 30. short-circuit coaxial line, 40. feeding component, 21. metal body, 22. first through hole, 23. second through hole, 24. third through hole, 25. fourth through hole, 26. solder joint, 20A. first vibrator, 20B. second vibrator, 20A1. first annular radiator single arm, 20A2. second annular radiator single arm, 20B1. third annular radiator single arm, 20B2. fourth annular radiator single arm, 31. outer conductor, 32. core wire, 33. metal cap, 31A. First end, 31B. Second end, 32A. First line end, 31B. Second end, L. Inductor, C. Capacitor, 41. First PCB circuit board, 42. Second PCB circuit board, 43. First bump structure, 44. Second bump structure, 45. Third bump structure, 46. Fourth bump structure, 100. Low frequency antenna assembly, 200. High frequency antenna assembly, 300. Reflector, 400. Intermediate frequency antenna assembly, 310. First layout area, 320. Second layout area, 330. Third layout area. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Figure 1 The first structural diagram of the low-frequency antenna assembly provided by the embodiment of the present invention only shows the parts related to the present embodiment for the convenience of description, which are described in detail as follows:

[0037] The low frequency antenna assembly 100 comprises:

[0038] A dielectric substrate 10, wherein the dielectric substrate 10 has a first mounting surface and a second mounting surface corresponding to the first mounting surface;

[0039] A radiator line 20, the radiator line 20 is laid on the first mounting surface of the dielectric substrate 10, the radiator line 20 includes two vibrators installed in orthogonal polarization, namely, a first vibrator 21A and a second vibrator 21B, each vibrator includes two annular radiator arms arranged diagonally, namely, the first vibrator 21A includes a first annular radiator arm 21A1 and a first annular radiator arm 21A2, the second vibrator 21B includes a third annular radiator arm 21B1 and a fourth annular radiator arm 21B2, each annular radiator arm includes a plurality of metal bodies 21 arranged in an annular shape and a short-circuit coaxial line 30 for connecting two adjacent metal bodies 21;

[0040] Each short-circuit coaxial line 30 includes an outer conductor 31 and a core wire 32 passing through the outer conductor 31. Figure 3As shown, the core wire 32 has a first wire end 32A and a second wire end 32B opposite to the first wire end, the outer conductor 31 has a first end 31A and a second end 31B opposite to the first end, the first wire end 32A of the core wire 32 is short-circuited with the first end 31A of the outer conductor 31, the second end 31B of the outer conductor 31 is passed through the second mounting surface and connected to one of the adjacent metal bodies 21, and the second wire end 32B of the core wire 32 passes through the second mounting surface, the first mounting surface and the corresponding metal body 21 in sequence and is connected to another adjacent metal body 21;

[0041] A feeding component 40 , one end of which is vertically coupled to the two oscillators, and the other end of which is connected to a feeding network.

[0042] In this embodiment, the dielectric substrate 10 is used to carry and fix the radiator circuit 20. The shape of the dielectric substrate 10 can be set according to the needs, such as round, square, etc. The two vibrators of the radiator circuit 20 are installed with orthogonal polarization, and each vibrator includes two annular radiator arms arranged diagonally. The specific shape of the annular radiator arm can be designed to be round, square or elliptical, such as Figure 2 or Figure 7 As shown, the single arm of the radiator is in a circular ring structure or a square ring structure.

[0043] The looped line allows the single arm of the radiator to meet the electrical dimensions required for excitation at a small aperture. Compared with the center-fed cross-shaped and X-shaped radiator arms, the radiator's single arm's ring-shaped radiating unit current path flows toward the outer edge of the aperture, which can obtain a higher radiation field superposition gain. Under the same gain condition, the aperture size can be reduced by about 15% to 20%, which can effectively reduce the width of the array of multiple low-frequency antennas.

[0044] The single arm of the annular radiator includes a plurality of metal bodies 21 arranged in an annular shape and a short-circuit coaxial line 30 for connecting two adjacent metal bodies 21. By segmenting the low-frequency radiating arm, the segmented short metal body 21 exhibits low scattering characteristics at high frequencies, which can effectively reduce the impact on high-frequency radiation performance. At the same time, the short-circuit coaxial line 30 includes an outer conductor 31 and a core wire 32 passing through the outer conductor 31. The first wire end 32A of the core wire 32 is short-circuited with the first end 31A of the outer conductor 31, and the short-circuit connection can be achieved by welding, metal wire, and short-circuiting the metal body 21, such as Figure 2 and Figure 3As shown, the second end 31B of the outer conductor 31 is arranged on the second mounting surface and connected to one of the adjacent metal bodies 21. In this embodiment, the second end 31B of the outer conductor 31 is connected to one of the metal bodies 21 by welding, and a welding spot 26 is provided on the adjacent metal body 21. The second end 32B of the core wire 32 passes through the dielectric substrate 10 and the corresponding metal body 21 and is bridged to another adjacent metal body 21 and welded to the welding spot 26. A parallel distributed capacitor is formed between the core wire 32 and the outer conductor 31. The circuit formed by the core wire 32 and the outer conductor 31 is a series inductor. The short-circuited coaxial line 30 is an LC parallel resonant circuit as a whole. Figure 4 As shown, the short-circuit coaxial line 30 plays a low-pass and high-resistance role, ensuring the normal operation of the low-frequency antenna assembly, thereby achieving low-frequency performance. There is no specific restriction on the welding angle between the short-circuit coaxial line 30 and the metal body 21, and the short-circuit coaxial line 30 can be welded vertically or at other angles.

[0045] The radiator line 20 is used to receive or transmit radiation signals and is connected to the feeding network through the feeding component 40. The feeding component 40 is vertically coupled to the two vibrators of the radiator line 20. In order to facilitate the connection between the vibrators and the feeding component 40, the metal bodies 21 at the intersection of the four radiator arms are all in a 90-degree angle shape and are arranged adjacent to each other. The adjacent metal bodies 21 at the intersection are provided with through holes for coupling with the feeding component 40, including a first through hole 22, a second through hole 23, a third through hole 24 and a fourth through hole 25. The feeding component 40 is provided with a corresponding convex structure and is coupled to the through hole through the dielectric substrate 10. The radiator line 20 is fed through the feeding component 40 at the center.

[0046] The embodiment of the present invention forms a low-frequency antenna assembly 100 by setting a dielectric substrate 10, a radiator line 20, and a feeding component 40 to receive a low-frequency radiation signal, wherein the annular radiator is arranged in single-arm segments, and the segmented metal body 21 exhibits low scattering characteristics for high-frequency electromagnetic waves, which can effectively reduce the impact on high-frequency radiation performance. At the same time, in order to ensure the normal operation of the low-frequency antenna assembly 100, a short-circuit coaxial line 30 is set to connect the metal bodies 21 in sequence. The short-circuit coaxial line 30 is equivalent to an LC parallel resonant circuit, which plays a low-pass high-resistance role, thereby achieving low-frequency performance and solving the problem of low-frequency radiation units interfering with high-frequency radiation signal performance when multiple antennas are integrated.

[0047] In one embodiment, the side length of the radiator line 20 is 0.3λ1~0.35λ1, λ1 is the wavelength of the low-frequency radiation signal, the side length of the radiator line 20 refers to the total width of the two annular radiator arms on the same side, and the diagonally arranged annular radiator arms have the same structure and are symmetrically arranged, so the length of each side is equal. According to the matching characteristics of the low-frequency antenna assembly 100 in the low-frequency band, in this embodiment, the side length of the radiator line 20 is 0.3λ1~0.35λ1. Too large or too small a side length may easily lead to a reduction in the matching characteristics of the low-frequency radiation signal and thus fail to meet the matching characteristics requirements. Similarly, segmentation will affect the matching characteristics of the low-frequency antenna assembly 100 in the low-frequency band. In order to take into account the matching and wave-transmitting function selection, the length of each metal body 21 is less than 0.125λ2, λ2 is the wavelength of the radiation signal to be transmitted. In one embodiment, the length of the segmented body is selected to be 0.122λ2 in combination with the matching and wave-transmitting functions.

[0048] like Figure 5 As shown, in one embodiment, the feeding component 40 is a feeding balun, including two PCB circuit boards in an embedded orthogonal structure, including a first PCB circuit board 41 and a second PCB circuit board 42, one end of each PCB circuit board is sequentially penetrated by a second mounting surface and a first mounting surface to be connected to a corresponding metal body 21, and the other end is connected to a feeding network, and each PCB circuit board is provided with two bump structures respectively coupled to a diagonally arranged annular radiator single arm, for example, a first bump structure 43 and a second bump structure 44 are provided at one end of the first PCB circuit board 41, and a third bump structure 45 and a fourth bump structure 46 are provided at one end of the second PCB circuit board 42, and through holes 22, 23, 24 and 25 for coupling and connecting with the feeding component 40 are provided on the adjacent metal bodies 21 at the intersection, and the bump structures pass through the dielectric substrate 10 and are coupled and connected with the through holes, one end of the feeding balun is connected to the radiator line 20, and the other end is connected to the feeding network, and the radiator line 20 is fed through the feeding balun at the center.

[0049] like Figure 6 As shown, in one embodiment, the short-circuited coaxial line 30 further includes a metal cap 33, and the first wire end 32A of the core wire 32 is short-circuited to the first end 31A of the outer conductor 31 through the metal cap 33, and the inner sides of the metal cap 33 are respectively attached to the core wire 32 and the outer conductor 31 to achieve a short-circuit connection. Through the short-circuit of the metal cap 33, the short-circuited coaxial line 30 is equivalent to a low-pass high-resistance filter, which curbs high-frequency current and allows low-frequency current to pass normally.

[0050] like Figure 8As shown, the second aspect of an embodiment of the present invention provides a dual-polarized antenna, including a reflector 300 and a plurality of high-frequency antenna components 200, and a low-frequency antenna component 100 with a wave-transmitting function as described above, wherein the end surface of the low-frequency antenna component 100 is higher than the end surface of the high-frequency antenna component 200, and the high-frequency antenna component 200 and the low-frequency antenna component 100 are arranged on the reflector 300.

[0051] In this embodiment, the single arm of the annular radiator on the low-frequency antenna assembly 100 is segmented and realizes the wave transmission function of the high-frequency radiation signal. The high-frequency radiation signal can be sent through the low-frequency antenna assembly 100 or sent to the high-frequency antenna assembly 200 located below the low-frequency antenna assembly 100, thereby realizing multi-antenna integration. At the same time, the high-frequency radiation signal is filtered through the short-circuited coaxial line 30. The short-circuited coaxial line 30 can be equivalent to an LC parallel resonant circuit, which plays a low-pass and high-resistance role, thereby achieving low-frequency performance.

[0052] In order to achieve more antenna integration, such as Fig. 9 As shown, in one embodiment, the dual-polarized antenna further includes a plurality of intermediate frequency antenna assemblies 400, each intermediate frequency antenna assembly 400 and each high frequency antenna assembly 200 are respectively located on opposite sides of the low frequency antenna assembly 100, the high frequency antenna assembly 200 and the low frequency antenna assembly 100 are far away from each other, the intermediate frequency radiation signal and the high frequency radiation signal will not affect each other, and at the same time, the low frequency antenna assembly 100 transmits and filters the intermediate frequency radiation signal and the high frequency radiation signal, the low frequency radiation signal and the intermediate frequency radiation signal will not affect each other, and the low frequency radiation signal and the high frequency radiation signal will not affect each other.

[0053] In order to further improve the wave transmission effect, Fig.10 As shown, in one embodiment, the length of the metal body 21 of the single arm of the annular radiator close to the intermediate frequency antenna assembly 400 in the low frequency antenna assembly 100 is greater than the length of the metal body 21 of the single arm of the annular radiator close to the high frequency antenna assembly 200 in the low frequency antenna assembly 100. In this embodiment, the second single arm 21A2 of the annular radiator is close to the high frequency antenna assembly 200, and the third single arm 21B1 of the annular radiator is close to the intermediate frequency antenna assembly 400. It can be understood that the wavelength of the signal is inversely proportional to the frequency. Therefore, the wavelength of the high frequency radiation signal is smaller than the intermediate frequency radiation signal. Therefore, according to the calculation formula of the metal body 21, the length of the metal body 21 of the single arm of the annular radiator close to the intermediate frequency antenna assembly 400 in the low frequency antenna assembly 100 is greater than the length of the metal body 21 of the single arm of the annular radiator close to the high frequency antenna assembly 200 in the low frequency antenna assembly 100. The low frequency antenna assembly 100 is symmetrically arranged, thereby improving the wave transmission effect of the intermediate frequency radiation signal and the high frequency radiation signal on both sides.

[0054] like Fig. 9As shown, in one embodiment, the reflector 300 has a first layout area 310, two second layout areas 320 located on opposite sides of the first layout area 310, and two third layout areas 330 respectively located on the side of the second layout area 320 away from the first layout area 310, each high-frequency antenna component 200 is arranged in parallel in the first layout area 310, each low-frequency antenna component 100 is arranged in parallel in the second layout area 320, and each intermediate-frequency antenna component 400 is arranged in parallel in the third layout area 330.

[0055] In this embodiment, the high-frequency antenna assembly 200 is arranged in the middle layout area of ​​the reflector 300, that is, the first layout area 310, the intermediate-frequency antenna assembly 400 is arranged on both sides of the reflector 300, and the low-frequency antenna assembly 100 is respectively located between the intermediate-frequency antenna assembly 400 and the high-frequency antenna assembly 200. At the same time, in order to reduce the area of ​​the reflector 300, the low-frequency antenna assembly 100 is arranged above the intermediate-frequency antenna assembly 400 and the high-frequency antenna assembly 200. The blocked intermediate-frequency antenna assembly 400 and the high-frequency antenna assembly 200 can normally receive the intermediate-frequency radiation signal and the low-frequency radiation signal under the wave transmission effect of the low-frequency antenna assembly 100, thereby It will not affect the signal reception of each antenna component. Each antenna component constitutes a TDD+FDD antenna. In one embodiment, the dual-polarized antenna includes two columns of low-frequency antenna components 100, two columns of intermediate-frequency antenna components 400, and four columns of high-frequency antenna components 200. The four columns of high-frequency antenna components 200 are located in the middle of the reflector 300, and the two columns of intermediate-frequency antenna components 400 are respectively located on both sides of the reflector 300. The two columns of low-frequency antenna components 100 are respectively located between the intermediate-frequency antenna components 400 and the high-frequency antenna components 200. The size of the array antenna is greatly reduced. Compared with the traditional TDD+FDD antenna, the antenna performance cost is reduced and the network construction is convenient.

[0056] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A low-frequency antenna assembly with wave-transmitting function, characterized in that: The low frequency antenna assembly comprises: A dielectric substrate, the dielectric substrate having a first mounting surface and a second mounting surface corresponding to the first mounting surface; A radiator circuit, wherein the radiator circuit is laid on the first mounting surface of the dielectric substrate, the radiator circuit comprises two vibrators mounted in orthogonal polarization, each of the vibrators comprises two annular radiator arms arranged diagonally, each of the annular radiator arms comprises a plurality of metal bodies arranged in an annular shape and a short-circuit coaxial line for connecting two adjacent metal bodies; Each of the short-circuit coaxial lines comprises an outer conductor and a core line passing through the outer conductor, the core line having a first line end and a second line end opposite to the first line end, the outer conductor having a first end and a second end opposite to the first end, the first line end of the core line is short-circuitedly connected to the first end of the outer conductor, the second end of the outer conductor is passed through the second mounting surface and connected to one of the adjacent metal bodies, and the second line end of the core line passes through the second mounting surface, the first mounting surface and the corresponding metal body in sequence and is connected to another adjacent metal body; A feeding component, one end of which is vertically coupled to the two vibrators, and the other end of which is connected to a feeding network.

2. The low-frequency antenna assembly with wave-transmitting function as claimed in claim 1, characterized in that: The side length of the radiator line is 0.3λ1-0.35λ1, where λ1 is the wavelength of the low-frequency radiation signal.

3. The low-frequency antenna assembly with wave-transmitting function as claimed in claim 1, characterized in that: The length of each of the metal bodies is less than 0.125λ2, where λ2 is the wavelength of the radiation signal to be transmitted.

4. The low-frequency antenna assembly with wave-transmitting function as claimed in claim 1, characterized in that: The feeding component includes two PCB circuit boards in an embedded orthogonal structure, one end of each PCB circuit board passes through the second mounting surface and the first mounting surface in sequence and is connected to the corresponding metal body, and the other end is connected to the feeding network.

5. The low-frequency antenna assembly with wave-transmitting function as claimed in claim 1, characterized in that: The single arm of the radiator is in a circular ring structure or a square ring structure.

6. The low-frequency antenna assembly with wave-transmitting function as claimed in claim 1, characterized in that: The short-circuit coaxial line further includes a metal cap, and the first wire end of the core wire is short-circuitedly connected to the first end of the outer conductor through the metal cap.

7. A dual-polarized antenna, comprising a reflector and a plurality of high-frequency antenna components, characterized in that: It also includes a low-frequency antenna component with a wave-transmitting function as described in any one of claims 1 to 6, wherein the end face of the low-frequency antenna component is higher than the end face of the high-frequency antenna component, and the high-frequency antenna component and the low-frequency antenna component are arranged on the reflecting plate.

8. The dual-polarized antenna according to claim 7, characterized in that: The dual-polarized antenna further comprises a plurality of intermediate frequency antenna components, each of the intermediate frequency antenna components and each of the high frequency antenna components being located at two opposite sides of the low frequency antenna component.

9. The dual-polarized antenna according to claim 8, characterized in that: The metal length of a single arm of the annular radiator in the low-frequency antenna assembly close to the intermediate-frequency antenna assembly is greater than the metal length of a single arm of the annular radiator in the low-frequency antenna assembly close to the high-frequency antenna assembly.

10. The dual-polarized antenna according to claim 8, characterized in that: The reflector has a first layout area, two second layout areas located on opposite sides of the first layout area, and two third layout areas respectively located on the side of the second layout area away from the first layout area. The high-frequency antenna components are arranged in parallel in the first layout area, the low-frequency antenna components are arranged in parallel in the second layout area, and the intermediate-frequency antenna components are arranged in parallel in the third layout area.

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