Communication system, antenna and feeding structure thereof

Abstract

The present invention discloses a communication system, an antenna and a feeding structure thereof, wherein a first high-frequency radiation unit includes a first balun and a first feeding assembly; a reflector is provided with a first side surface and a second side surface arranged at a relative interval, and a first through hole penetrating the first side surface and the second side surface, and the diameter of the first through hole is greater than the outer diameter of the first balun; a feeding network includes a metal cavity fixedly arranged on the second side surface, and a feeding network assembly arranged in the metal cavity, and a side wall of the metal cavity is provided with a second through hole arranged corresponding to the first through hole; the first balun can pass through the first through hole and be connected to the metal cavity, and the first feeding assembly can pass through the second through hole and be electrically connected to the feeding network assembly. The structure of the feeding structure is simple, and the network loss is small; thus, the structure of the antenna using the feeding structure is simple, and the network loss is low; thus, the structure of the communication system using the antenna is simple, and the radiation performance is good.

Description

Technical Field

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

[0002] With the development of communication technology, multi-frequency and multi-polarization antennas have become a development trend. Especially in the 5G network era, it is necessary to integrate all 4G network standard antennas in one antenna. Since there are multiple radiating units inside the antenna, the array settings between different radiating units are very compact, resulting in an extremely complex feeding structure of the radiating unit and large network loss. Summary of the invention

[0003] Based on this, a communication system, an antenna and a feeding structure thereof are proposed. The feeding structure has a simple structure and low network loss. Thus, the antenna using the feeding structure has a simple structure and low network loss. Thus, the communication system using the antenna has a simple structure and good radiation performance.

[0004] The technical solution is as follows:

[0005] On the one hand, a feeding structure is provided, comprising: a first high-frequency radiation unit, the first high-frequency radiation unit comprising a first balun and a first feeding component; a reflection plate, the reflection plate being provided with a first side surface and a second side surface arranged relatively spaced apart, and a first through hole penetrating the first side surface and the second side surface, and the diameter of the first through hole is larger than the outer diameter of the first balun; and a feeding network, the feeding network comprising a metal cavity fixedly arranged on the second side surface, and a feeding network component arranged in the metal cavity, the side wall of the metal cavity being provided with a second through hole arranged corresponding to the first through hole; wherein the first balun can pass through the first through hole and be connected to the metal cavity, and the first feeding component can pass through the second through hole and be electrically connected to the feeding network component.

[0006] In the feeding structure of the above-mentioned embodiment, the metal cavity of the feeding network is fixed on the second side of the reflecting plate by riveting or clamping, and the feeding network component is arranged in the metal cavity. The first balun of the first high-frequency radiation unit is passed through the first through hole from above the first side, and the first balun is not in contact with the reflecting plate, and one end of the first balun is fixed on the side wall of the metal cavity by riveting or clamping. The first feeding component of the first high-frequency radiation unit is passed through the second through hole on the side wall of the metal cavity, so that the first feeding component is electrically connected to the feeding network component in the metal cavity, so that the first radiator of the first high-frequency radiation unit can be fed, and the first high-frequency radiation unit can radiate signals. The feeding structure of the above embodiment only needs to install the first balun on the side wall of the metal cavity after passing through the first through hole, and electrically connect the first feeding component to the feeding network component after passing through the second through hole, so as to feed the first radiator of the first high-frequency radiation unit. The structure is simple, and compared with the traditional feeding method, there is no need to use coaxial cable for switching, which reduces the network length of the feeding network and reduces the network loss.

[0007] The technical solution is further described below:

[0008] In one embodiment, the first high-frequency radiation unit also includes a first radiator connected to the first feeding assembly, one end of the first balun is connected to the metal cavity, the first radiator is connected to the other end of the first balun, and the spacing between the first radiator and the reflection plate is equal to or approximately equal to one-quarter wavelength of a center frequency corresponding to the working frequency band of the first high-frequency radiation unit.

[0009] In one of the embodiments, the metal cavity is further provided with a welding hole for welding the first feeding component and the feeding network component.

[0010] In one embodiment, the feeding structure also includes a low-frequency radiating unit and a second high-frequency radiating unit having the same working frequency band as the first high-frequency radiating unit, the low-frequency radiating unit is arranged on the first side, the low-frequency radiating unit includes a low-frequency radiator, the second high-frequency radiating unit is arranged on the low-frequency radiator, and the central axis of the first high-frequency radiating unit, the central axis of the low-frequency radiating unit and the central axis of the second high-frequency radiating unit coincide or approximately coincide.

[0011] In one of the embodiments, the distance between the low-frequency radiator and the reflector is equal to or approximately equal to a quarter of the wavelength of the center frequency corresponding to the working frequency band of the low-frequency radiating unit.

[0012] In one embodiment, the second high-frequency radiation unit includes a second feeding component and a first coaxial cable, the low-frequency radiator is provided with a third through hole for the second feeding component to pass through, the reflection plate is provided with a fourth through hole for the first coaxial cable to pass through, one end of the second feeding component passes through the third through hole, the first coaxial cable passes through the fourth through hole, and one end of the first coaxial cable is electrically connected to one end of the second feeding component, and the other end of the first coaxial cable is electrically connected to the feeding network component.

[0013] In one embodiment, the low-frequency radiation unit includes a second coaxial cable and a second balun arranged on the first side, the reflector is provided with a fifth through hole for the second coaxial cable to pass through, one end of the second coaxial cable is electrically connected to the second balun, and the other end of the second coaxial cable is electrically connected to the feeding network component.

[0014] In one embodiment, the second high-frequency radiation unit further includes a second radiator, and the distance between the second radiator and the reflection plate is equal to or approximately equal to half the wavelength of a center frequency corresponding to the working frequency band of the second high-frequency radiation unit.

[0015] In one embodiment, there are at least two of the low-frequency radiation units and the second high-frequency radiation units, the low-frequency radiation units and the second high-frequency radiation units are arranged in a one-to-one correspondence, at least two of the low-frequency radiation units are arranged in an array, and one of the first high-frequency radiation units is provided between two adjacent low-frequency radiation units.

[0016] On the other hand, an antenna is provided, comprising the feeding structure.

[0017] The antenna of the above embodiment only needs to pass the first balun of the first high-frequency radiation unit through the first through hole of the reflection plate and then install it on the side wall of the metal cavity of the feeding network, and pass the first feeding component through the second through hole and electrically connect it to the feeding network component, so as to feed the first radiator of the first high-frequency radiation unit. The structure is simple, and compared with the traditional feeding method, there is no need to use coaxial cable for switching, which reduces the network length of the feeding network, reduces the network loss, improves the gain index of the antenna, and compensates for the aperture phase difference of different electromagnetic boundaries of the antenna.

[0018] On the other hand, a communication system is provided, comprising the antenna.

[0019] The communication system of the above embodiment only needs to pass the first balun of the first high-frequency radiation unit through the first through hole of the reflection plate and then install it on the side wall of the metal cavity of the feeding network, and pass the first feeding component through the second through hole and electrically connect it to the feeding network component, so as to feed the first radiator of the first high-frequency radiation unit. The structure is simple, and compared with the traditional feeding method, there is no need to use coaxial cable for switching, which reduces the network length of the feeding network, reduces the network loss, improves the gain index of the antenna, compensates for the aperture phase difference of different electromagnetic boundaries of the antenna, and can flexibly adjust the network parameters to achieve universal product design and index optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a feeding structure of an embodiment;

[0021] Figure 2 for Figure 1 A front view of the feeding structure;

[0022] Figure 3 for Figure 2 A cross-sectional view taken along line AA of the first high-frequency radiation unit of the feeding structure;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the feeding structure from another perspective;

[0024] Figure 5 for Figure 1 An exploded view of the assembly of the first high-frequency radiation unit of the feeding structure, the transmitting board and the feeding network;

[0025] Figure 6 for Figure 1 A schematic structural diagram of a second side surface of a reflector of a feeding structure;

[0026] Figure 7 for Figure 1 A top view of a metal cavity of a feeding structure;

[0027] Figure 8 for Figure 1 A top view of a feeding network component of a feeding structure;

[0028] Fig. 9 for Figure 1 Bottom view of the metal cavity of the feeding structure.

[0029] Description of reference numerals:

[0030] 10. Feeding structure, 100. First high-frequency radiating unit, 110. First balun, 120. First feeding assembly, 130. First radiator, 200. Reflecting plate, 210. First side, 220. Second side, 230. First through hole, 240. Fourth through hole, 300. Feeding network, 310. Metal cavity, 311. Second through hole, 312. Welding hole, 320. Feeding network assembly, 400. Low-frequency radiating unit, 410. Low-frequency radiator, 420. Second coaxial cable, 500. Second high-frequency radiating unit, 510. Second feeding assembly, 520. First coaxial cable, 530. Second radiator. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0032] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or being "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "rotatably 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", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to restrict the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] The terms "first", "second", "third" and the like in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0035] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0036] like Figures 1 to 3 , Figure 5 As shown, in one embodiment, a feeding structure 10 is provided, comprising a first high-frequency radiation unit 100, a reflection plate 200 and a feeding network 300. The first high-frequency radiation unit 100 comprises a first balun 110 and a first feeding assembly 120. The reflection plate 200 is provided with a first side surface 210 and a second side surface 220 arranged at a relative interval, and a first through hole 230 penetrating the first side surface 210 and the second side surface 220, and the diameter of the first through hole 230 is greater than the outer diameter of the first balun 110. The feeding network 300 comprises a metal cavity 310 fixed to the second side surface 220, and a feeding network assembly 320 arranged in the metal cavity 310, and a side wall of the metal cavity 310 is provided with a second through hole 311 arranged corresponding to the first through hole 230. The first balun 110 can pass through the first through hole 230 and be connected to the metal cavity 310, and the first feeding assembly 120 can pass through the second through hole 311 and be electrically connected to the feeding network assembly 320.

[0037] In the feeding structure 10 of the above embodiment, the metal cavity 310 of the feeding network 300 is fixed on the second side surface 220 of the reflector 200 by riveting or clamping, and the feeding network component 320 is arranged in the metal cavity 310. The first balun 110 of the first high-frequency radiation unit 100 passes through the first through hole 230 from above the first side surface 210, and the first balun 110 does not contact the reflector 200, and one end of the first balun 110 is fixed on the side wall of the metal cavity 310 by riveting or clamping. The first feeding component 120 of the first high-frequency radiation unit 100 passes through the second through hole 311 on the side wall of the metal cavity 310, so that the first feeding component 120 is electrically connected to the feeding network component 320 in the metal cavity 310, so that the first radiator 130 of the first high-frequency radiation unit 100 can be fed, and the first high-frequency radiation unit 100 can radiate signals. The feeding structure 10 of the above embodiment only needs to install the first balun 110 on the side wall of the metal cavity 310 after passing the first through hole 230, and electrically connect the first feeding component 120 with the feeding network component 320 after passing the first through hole 311, so as to feed the first radiator 130 of the first high-frequency radiation unit 100. The structure is simple, and compared with the traditional feeding method, there is no need to use a coaxial cable for switching, which reduces the network length of the feeding network 300 and reduces the network loss.

[0038] The first feeding component 120 can be set in the form of a feeding sheet, and a through hole for the feeding sheet to pass through can be opened on the first balun 110. One end of the feeding sheet and the first radiator 130 can be coupled and fed, and the other end of the feeding sheet can be electrically connected to the feeding network component 320 by welding. The size of the first through hole 230 needs to be adapted to the outer contour of the first balun 110, and it is only necessary to make the first balun 110 pass through the first through hole 230 smoothly and the first balun 110 is not connected to the reflector 200. The feeding network component 320 can be set as a circuit board with a strip line.

[0039] like Figure 3 As shown, in one embodiment, the first high-frequency radiation unit 100 also includes a first radiator 130 connected to the first feeding assembly 120. The first radiator 130 is disposed above the first side surface 210 of the reflector 200 and can smoothly radiate the signal. One end of the first balun 110 is connected to the metal cavity 310 by riveting or clamping. The first radiator 130 is connected to the other end of the first balun 110, and the first radiator 130 can be integrally formed with the first balun 110 by die-casting. The spacing between the first radiator 130 and the reflector 200 (such as Figure 1 L) is equal to or approximately equal to a quarter wavelength of the center frequency corresponding to the working frequency band of the first high-frequency radiation unit 100. In this way, it is possible to ensure that the first high-frequency radiation unit 100 has good radiation performance. Among them, the spacing between the first radiator 130 and the reflector 200 refers to the spacing between the surface of the first radiator 130 and the first side surface 210. Approximately equal means that the influence of the processing error and the installation error is taken into account, and they can be considered equal within the allowable error range.

[0040] like Figure 6 and Fig. 9 As shown, on the basis of any of the above embodiments, the metal cavity 310 is further provided with a welding hole 312 for welding the first feeding assembly 120 and the feeding network assembly 320. In this way, the first feeding assembly 120 is inserted into the metal cavity 310 from the second through hole 311 on the upper side wall of the metal cavity 310, and the first feeding assembly 120 and the feeding network assembly 320 are welded through the welding hole 312 on the lower side wall of the metal cavity 310, so that the first feeding assembly 120 and the feeding network assembly 320 are stably electrically connected, the operation is simple and convenient, and the installation efficiency is improved.

[0041] like Figure 1 , Figure 2 and Figure 4As shown, based on any of the above embodiments, the feeding structure 10 further includes a low-frequency radiation unit 400 and a second high-frequency radiation unit 500 having the same working frequency band as the first high-frequency radiation unit 100. In this way, the multi-frequency and multi-polarization of the antenna is achieved by the cooperation of the low-frequency radiation unit 400, the first high-frequency radiation unit 100 and the second high-frequency radiation unit 500. The low-frequency radiation unit 400 is arranged on the first side surface 210 by riveting or clamping. Figure 1 As shown, the low-frequency radiation unit 400 includes a low-frequency radiation body 410, and the second high-frequency radiation unit 500 is arranged on the low-frequency radiation body 410 by riveting or clamping. In this way, the low-frequency radiation unit 400 and the second high-frequency radiation unit 500 are nested. The central axis of the first high-frequency radiation unit 100, the central axis of the low-frequency radiation unit 400 and the central axis of the second high-frequency radiation unit 500 coincide or approximately coincide. In this way, the internal structure of the antenna is compact and the size of the antenna can be reduced. Approximate coincidence takes into account the influence of processing errors and installation errors, and can be considered as coincidence within the allowable error range.

[0042] In one embodiment, the spacing between the low-frequency radiator 410 and the reflector 200 is equal to or approximately equal to a quarter wavelength of the center frequency corresponding to the working frequency band of the low-frequency radiating unit 400. In this way, the low-frequency radiating unit 400 can be guaranteed to have good radiation performance. Among them, the spacing between the low-frequency radiator 410 and the reflector 200 refers to the spacing between the surface of the low-frequency radiator 410 and the first side surface 210. Approximately equal means that the influence of processing error and installation error is taken into account, and they can be considered equal within the allowable error range.

[0043] like Figure 2 and Figure 4 As shown, in one embodiment, the second high-frequency radiation unit 500 includes a second feeding assembly 510 and a first coaxial cable 520. The low-frequency radiator 410 is provided with a third through hole (not shown) for the second feeding assembly 510 to pass through, and the reflection plate 200 is provided with a fourth through hole 240 (not shown) for the first coaxial cable 520 to pass through. Figure 6As shown). One end of the second feeding component 510 passes through the third through hole, the first coaxial cable 520 passes through the fourth through hole 240, one end of the first coaxial cable 520 is electrically connected to one end of the second feeding component 510 by welding or the like, and the other end of the first coaxial cable 520 is electrically connected to the feeding network component 320 by welding or the like. In this way, one end of the second feeding component 510 can be passed through the third through hole of the low-frequency radiator 410; after the first coaxial cable 520 passes through the fourth through hole 240, the first coaxial cable 520 is used to realize the electrical connection between the second feeding component 510 and the feeding network component 320; and then the other end of the second feeding component 510 is connected to the second radiator 530 of the second high-frequency radiation unit 500 to realize the feeding of the second radiator 530; thereby, the energy can be smoothly transmitted to the second radiator 530, and the radiation performance of the second high-frequency radiation unit 500 is ensured. The second feeding component 510 can be set in the form of a feeding sheet. At the same time, the length of the first coaxial cable 520 can be flexibly adjusted, so that the network parameters can be flexibly adjusted to achieve universalization of product design and optimization of indicators.

[0044] like Figure 4 , Figures 6 to 9 As shown, in one embodiment, the low-frequency radiation unit 400 includes a second coaxial cable 420 and a second balun (not shown) arranged on the first side 210. The reflector 200 is provided with a fifth through hole (not shown) for the second coaxial cable 420 to pass through. One end of the second coaxial cable 420 passes through the fifth through hole, one end of the second coaxial cable 420 is electrically connected to the second balun by welding or the like, and the other end of the second coaxial cable 420 is electrically connected to the feed network component 320 by welding or the like. In this way, the second coaxial cable 420 is passed through the fifth through hole, and the second balun is electrically connected to the feed network component 320 by the second coaxial cable 420, so that the low-frequency radiation unit 400 can be fed by the extremely short second coaxial cable 420, and the aperture phase difference of different electromagnetic boundaries of the antenna can be compensated. Of course, in other embodiments, the low-frequency radiation unit 400 can also adopt other existing structures, as long as it can radiate the signal and facilitate nested installation with the second high-frequency radiation unit 500.

[0045] like Figure 1 and Figure 4 As shown, in one embodiment, the second high-frequency radiation unit 500 further includes a second radiator 530, and the distance between the second radiator 530 and the reflection plate 200 (eg Figure 1H) is equal to or approximately equal to half the wavelength of the center frequency corresponding to the working frequency band of the second high-frequency radiation unit 500. In this way, it is possible to ensure that the second high-frequency radiation unit 500 has good radiation performance. Among them, the spacing between the second radiator 530 and the reflection plate 200 refers to the spacing between the surface of the second radiator 530 and the first side surface 210. Approximately equal means that the influence of processing error and installation error is taken into account, and they can be considered equal within the allowable error range.

[0046] In one embodiment, the spacing between the first radiator 130 and the reflector 200 is equal to or approximately equal to a quarter wavelength of the center frequency corresponding to the working frequency band of the first high-frequency radiating unit 100; the spacing between the low-frequency radiator 410 and the reflector 200 is equal to or approximately equal to a quarter wavelength of the center frequency corresponding to the working frequency band of the low-frequency radiating unit 400; the spacing between the second radiator 530 and the reflector 200 is equal to or approximately equal to a half wavelength of the center frequency corresponding to the working frequency band of the second high-frequency radiating unit 500. In this way, it can be ensured that the first high-frequency radiating unit 100, the low-frequency radiating unit 400 and the second high-frequency radiating unit 500 all have good radiation performance.

[0047] like Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment, there are at least two low-frequency radiation units 400 and second high-frequency radiation units 500, and the low-frequency radiation units 400 and the second high-frequency radiation units 500 are arranged one by one, and at least two low-frequency radiation units 400 are arranged in an array. And a first high-frequency radiation unit 100 is arranged between two adjacent low-frequency radiation units 400. In this way, the first high-frequency radiation unit 100, the low-frequency radiation unit 400, and the second high-frequency radiation unit 500 of the antenna are all arranged in an array, making the internal structure of the antenna compact and reducing the size of the antenna.

[0048] like Figures 1 to 3 As shown, in one embodiment, an antenna is further provided, comprising the feeding structure 10 of any of the above embodiments.

[0049] The antenna of the above embodiment only needs to pass the first balun 110 of the first high-frequency radiation unit 100 through the first through hole 230 of the reflection plate 200 and then be installed on the side wall of the metal cavity 310 of the feeding network 300, and pass the first feeding component 120 through the second through hole 311 and electrically connect it to the feeding network component 320, so as to feed the first radiator 130 of the first high-frequency radiation unit 100. The structure is simple, and compared with the traditional feeding method, there is no need to use a coaxial cable for switching, which reduces the network length of the feeding network 300, reduces the network loss, improves the gain index of the antenna, and compensates for the aperture phase difference of different electromagnetic boundaries of the antenna.

[0050] In one embodiment, a communication system is further provided, comprising the antenna of any one of the above embodiments.

[0051] The communication system of the above embodiment only needs to pass the first balun 110 of the first high-frequency radiation unit 100 through the first through hole 230 of the reflection plate 200 and then install it on the side wall of the metal cavity 310 of the feeding network 300, and pass the first feeding component 120 through the second through hole 311 and electrically connect it to the feeding network component 320, so as to feed the first radiator 130 of the first high-frequency radiation unit 100. The structure is simple, and compared with the traditional feeding method, there is no need to use a coaxial cable for switching, which reduces the network length of the feeding network 300, reduces the network loss, improves the gain index of the antenna, compensates for the aperture phase difference of different electromagnetic boundaries of the antenna, and can flexibly adjust the network parameters to achieve universal product design and index optimization.

[0052] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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.

[0053] The above 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 restrictions on 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, which 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. A feeding structure, characterized in that: include: A first high-frequency radiation unit, wherein the first high-frequency radiation unit comprises a first balun and a first feeding component; A reflector, wherein the reflector is provided with a first side surface and a second side surface that are relatively spaced apart, and a first through hole that penetrates the first side surface and the second side surface, and the diameter of the first through hole is larger than the outer diameter of the first balun; and A feeding network, the feeding network comprising a metal cavity fixedly arranged on the second side surface, and a feeding network component arranged in the metal cavity, and a side wall of the metal cavity is provided with a second through hole arranged corresponding to the first through hole; Among them, the first balun can pass through the first through hole and be connected to the metal cavity, and the first feeding component can pass through the second through hole and be electrically connected to the feeding network component; the first high-frequency radiation unit also includes a first radiator connected to the first feeding component, one end of the first balun is riveted or clamped to the side wall of the metal cavity, and the first radiator and the other end of the first balun are integrally formed by die-casting; the metal cavity is also provided with a welding hole for welding the first feeding component and the feeding network component.

2. The feeding structure according to claim 1, characterized in that: The distance between the first radiator and the reflector is equal to or approximately equal to one quarter of the wavelength of the center frequency corresponding to the working frequency band of the first high-frequency radiation unit.

3. The feeding structure according to claim 1, characterized in that: The first feeding component is configured as a feeding plate, and the first balun is provided with a through hole for the feeding plate to pass through.

4. The feeding structure according to any one of claims 1 to 3, characterized in that: It also includes a low-frequency radiation unit and a second high-frequency radiation unit with the same working frequency band as the first high-frequency radiation unit, the low-frequency radiation unit is arranged on the first side, the low-frequency radiation unit includes a low-frequency radiator, the second high-frequency radiation unit is arranged on the low-frequency radiator, and the central axis of the first high-frequency radiation unit, the central axis of the low-frequency radiation unit and the central axis of the second high-frequency radiation unit coincide or approximately coincide.

5. The feeding structure according to claim 4, characterized in that: The distance between the low-frequency radiator and the reflector is equal to or approximately equal to a quarter of the wavelength of the center frequency corresponding to the working frequency band of the low-frequency radiating unit.

6. The feeding structure according to claim 4, characterized in that: The second high-frequency radiation unit includes a second feeding component and a first coaxial cable, the low-frequency radiator is provided with a third through hole for the second feeding component to pass through, the reflection plate is provided with a fourth through hole for the first coaxial cable to pass through, one end of the second feeding component passes through the third through hole, the first coaxial cable passes through the fourth through hole, and one end of the first coaxial cable is electrically connected to one end of the second feeding component, and the other end of the first coaxial cable is electrically connected to the feeding network component.

7. The feeding structure according to claim 4, characterized in that: The low-frequency radiation unit includes a second coaxial cable and a second balun arranged on the first side, the reflector is provided with a fifth through hole for the second coaxial cable to pass through, one end of the second coaxial cable is electrically connected to the second balun, and the other end of the second coaxial cable is electrically connected to the feeding network component.

8. The feeding structure according to claim 4, characterized in that: The second high-frequency radiation unit further includes a second radiator, and the distance between the second radiator and the reflection plate is equal to or approximately equal to half the wavelength of a center frequency corresponding to the working frequency band of the second high-frequency radiation unit.

9. The feeding structure according to claim 4, characterized in that: There are at least two of the low-frequency radiation units and the second high-frequency radiation units, and the low-frequency radiation units and the second high-frequency radiation units are arranged in a one-to-one correspondence. At least two of the low-frequency radiation units are arranged in an array, and one of the first high-frequency radiation units is provided between two adjacent low-frequency radiation units.

10. An antenna, characterized in that: Comprising the feeding structure according to any one of claims 1 to 9.

11. A communication system, characterized in that: Comprising the antenna as claimed in claim 10.

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