CN118412640B

CN118412640B - Base station antenna

Info

Publication number: CN118412640B
Application number: CN202310042903.5A
Authority: CN
Inventors: 蒋沅臻; 牛魁; 王荣理; 张喆; 张昊; 孙磊; 沈楠
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2025-07-04
Anticipated expiration: 2043-01-28
Also published as: CN118412640A; WO2024156292A1

Abstract

The present invention discloses a base station antenna, comprising a reflector, wherein a reflection cavity is formed inside the reflector; a feed structure is suspended in the reflection cavity; an antenna unit is arranged in the reflection cavity; and an insulating mounting frame, wherein the antenna unit is detachably arranged on the insulating mounting frame, the insulating mounting frame is arranged in the reflection cavity and is detachably connected to the reflector, so that the feed structure and the reflector are coupled and connected to the antenna unit respectively. The present invention provides a base station antenna, which solves the technical problem of a large number of welding points in an existing antenna array.

Description

Base station antenna

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a base station antenna.

Background

With the development of mobile communication technology, most operators put higher demands on base station antennas. The conventional single-frequency or dual-frequency antenna Shan Zhenlie can not meet the requirements of users in most areas, so operators tend to select large-scale MIMO antenna arrays to improve the capacity and the universality of the base station when the base station is built. Compared with the traditional 2T2R or 8T8R 4G antenna products, the structure of the antenna array of the MIMO technology is more compact, and the number of the array oscillator units is more. However, more array subunits increase the complexity of the feed line, and the complex feed line brings more welding points, so that the welding points of the whole antenna are tens of times bigger, and the intermodulation index of the antenna is adversely affected.

Disclosure of Invention

The application mainly aims to provide a base station antenna, which aims to solve the technical problem of large number of welding spots of the existing antenna array.

According to an aspect of an embodiment of the present application, there is provided a base station antenna including:

a reflector, the reflector having a reflective cavity formed therein;

A feed structure suspended within the reflective cavity;

an antenna unit disposed in the reflective cavity, and

The insulation mounting frame is detachably arranged on the insulation mounting frame, and the insulation mounting frame is arranged in the reflection cavity and detachably connected with the reflector, so that the feed structure and the reflector are respectively connected with the antenna unit in a coupling way.

Compared with the prior art, in the technical scheme provided by the application, the antenna unit is directly fixed in the reflecting cavity in the reflector by the insulating mounting frame, so that the antenna unit is respectively coupled and connected with the feed structure and the reflector, the operation of welding the antenna unit and the reflector during the traditional antenna installation is omitted, the number of welding spots can be reduced, the energy loss is reduced, and the intermodulation index of the antenna is improved. Moreover, the detachable setting of antenna element is on insulating mounting bracket, and each component in the fixed antenna element of direct utilization insulating mounting bracket ensures that the relative position between each component can not change, improves fixed reliability, and has replaced the welded fastening operation between each component, can further reduce the quantity of solder joint, and then improves the intermodulation index of antenna. According to the technical scheme provided by the application, the antenna units are installed and fixed by using the insulating mounting frame, any welding operation is not needed, the procedure steps in the antenna assembling process can be reduced, the assembling complexity is reduced, the assembling efficiency is improved, and meanwhile, the influence of welding introduction on intermodulation indexes of the antenna is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an angle structure of an embodiment of a base station antenna according to the present application;

Fig. 2 is a schematic diagram of another angle structure of an embodiment of a base station antenna according to the present application;

FIG. 3 is a schematic view of a part of the enlarged structure of the portion A in FIG. 1;

fig. 4 is a schematic diagram of a portion of a base station antenna according to an embodiment of the present application;

fig. 5 is a schematic view illustrating an angle structure of an insulating mounting frame in an embodiment of a base station antenna according to the present application;

fig. 6 is a schematic view of another angle structure of an insulating mounting frame in an embodiment of a base station antenna according to the present application;

Fig. 7 is a schematic diagram of a portion of a base station antenna according to a second embodiment of the present application;

fig. 8 is a schematic diagram of a portion of a base station antenna according to a third embodiment of the present application;

fig. 9 is a schematic view illustrating an angle structure of an insulating holder in an embodiment of a base station antenna according to the present application;

fig. 10 is a schematic view of another angle structure of an insulating holder in an embodiment of a base station antenna according to the present application;

fig. 11 is a schematic cross-sectional view of an embodiment of a base station antenna according to the present application;

FIG. 12 is a schematic view of a part of the enlarged structure of the portion B in FIG. 11;

FIG. 13 is a schematic view of a partially enlarged structure of portion C in FIG. 11;

Fig. 14 is a schematic view of an angle structure of a feeding structure in an embodiment of a base station antenna according to the present application;

fig. 15 is a schematic view of another angle structure of the feeding structure in the base station antenna according to the present application;

FIG. 16 is a schematic view of the portion D of FIG. 15 in a partially enlarged configuration;

Fig. 17 is a schematic diagram of a reflector in an embodiment of a base station antenna according to the present application;

fig. 18 is a schematic diagram of an antenna balun in an embodiment of a base station antenna according to the present application;

Fig. 19 is a schematic diagram of an array arm in an embodiment of a base station antenna according to the present application.

Reference numerals illustrate:

100. A reflector; 110, bottom plate, 120, side plate, 121, rib, 122, spacer, 130, chute, 140, first fastening position, 200, feeding structure, 210, circuit board, 220, feeding strip line, 230, windowing, 240, supporting frame, 250, fifth positioning part, 300, antenna unit, 310, antenna balun, 311, coupling part, 312, cross arm, 313, longitudinal arm, 320, array arm, 321, first sub-arm, 322, second sub-arm, 323, third sub-arm, 330, second fastening position, 340, second positioning part, 350, hook position, 360, fourth positioning part, 400, insulating mounting frame, 410, base, 420, first fastening, 421, connecting part, 422, operating part, 423, chuck, 430, second fastening, 431, stand, 432, extension part, 440, first positioning part, 450, third positioning part, 500, insulating fixing frame, 510, chassis, 520, clamping structure, 521, first clamping part, 5211, first clamping plate, 5212, second clamping plate, 21, second clamping plate, 23, support space, and space 5223.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the embodiments of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present application) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like in the embodiments of the present application are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.

In the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or a communication between two elements or an interaction between two elements unless explicitly specified otherwise. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In addition, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the embodiments of the present application.

With the advent of the 5G high-speed information age, massiveMIMO (large-scale multiple input multiple output technology) antenna arrays have a more compact structure than traditional 2T2R or 8T8R 4G antenna products, and have a larger number of array vibrator units, which is beneficial to improving the capacity and universality of base stations, so that the demands of users in most areas are met.

However, providing more array subunits increases the complexity of the feeder circuit. Taking the current large-scale array antenna of the mainstream 32T scheme of the 5G base station as an example, the array antenna is generally formed by arranging 2 rows and 16 columns of antenna sub-arrays according to a certain rule, and the array antenna corresponds to the array antenna of the current main stream of the 5G base station, namely 32 feeder circuits. At present, the industry generally adopts the air strip line feed scheme to reduce the circuit loss, and the air strip line feed scheme is connected through the welding point when the equipment, and the welding point can cause partial energy loss, and the feed performance can produce uncertainty, also can bring inconvenient influence for later stage installation. In addition, the complicated feed circuit brings more welding points, higher line loss, higher manufacturing cost and more complicated assembly flow, and the welding points of the whole antenna are tens of times bigger, so that the intermodulation index of the antenna is adversely affected.

Therefore, the embodiment of the application provides the base station antenna, the antenna unit is installed and fixed by using the insulating mounting frame, any welding operation is not needed, the procedure steps of the antenna assembling process can be reduced, the assembling complexity is reduced, the assembling efficiency is improved, and meanwhile, the influence of welding introduction on intermodulation indexes of the antenna is avoided.

In order to better understand the above technical solutions, the following describes the above technical solutions in detail with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, an embodiment of the present application provides a base station antenna, including:

A reflector 100, the inside of the reflector 100 forming a reflective cavity;

A feed structure 200 suspended within the reflective cavity;

an antenna unit 300 disposed in the reflective cavity, and

The insulating mounting frame 400, the antenna unit 300 is detachably arranged on the insulating mounting frame 400, and the insulating mounting frame 400 is arranged in the reflecting cavity and is detachably connected with the reflector 100, so that the feed structure 200 and the reflector 100 are respectively coupled and connected with the antenna unit 300.

In the technical scheme adopted in this embodiment, the antenna unit 300 is directly fixed in the reflecting cavity in the reflector 100 by using the insulating mounting frame 400, so that the antenna unit 300 is respectively coupled with the feed structure 200 and the reflector 100, the operation of welding the antenna unit 300 and the reflector 100 during the traditional antenna installation is omitted, the number of welding spots can be reduced, the energy loss is reduced, and the intermodulation index of the antenna is improved. Moreover, the detachable setting of antenna element 300 is on insulating mounting bracket 400, directly utilizes each component in the fixed antenna element 300 of insulating mounting bracket 400, ensures that the relative position between each component can not change, improves fixed reliability to replaced the welded fastening operation between each component, can further reduce the quantity of solder joint, and then improved the intermodulation index of antenna. According to the technical scheme provided by the application, the insulating mounting frame 400 is utilized to mount and fix the antenna unit 300, any welding operation is not needed, the procedure steps in the process of assembling the antenna can be reduced, the complexity of assembly is reduced, the assembly efficiency is improved, and meanwhile, the influence of welding introduction on intermodulation indexes of the antenna is avoided.

Specifically, the base station antenna includes a reflector 100, a feed structure 200, an antenna unit 300, and an insulating mount 400. The reflector 100 is made of metal, a reflecting cavity is formed in the reflector 100, and the reflector can be integrally formed through a pultrusion process, so that the difficulty in processing is small, and the consistency is high. Preferably, referring to fig. 17, the reflector 100 includes a bottom plate 110 and a side plate 120 connected to the bottom plate 110, and the side plate 120 cooperates with the bottom plate 110 to jointly enclose the reflector 100 having a reflective cavity. In an embodiment, a plurality of reflectors 100 may be disposed, and two adjacent reflectors 100 may share the same side plate 120, which is not limited herein.

The feeding structure 200 is arranged in the reflecting cavity and suspended in the reflecting cavity, the feeding structure 200 can be a PCB or a metal strip line, and the air is used as a medium for electromagnetic wave transmission, so that the path loss can be effectively reduced. It will be appreciated that the feeding structure 200 provided in this embodiment adopts the air strip line operating principle, and will not be described in detail here. Referring to fig. 17, the air strip line needs to have a metal ground above and below the feeder line, for this purpose, the side plate 120 is further provided with a barrier plate 122, and the barrier plate 122 and the bottom plate 110 are disposed on the upper and lower sides of the feed structure 200 and together form the metal ground to satisfy the working condition of the air strip line. Preferably, two opposite side plates 120 are respectively provided with a baffle 122, and extend in directions approaching each other but do not intersect, that is, a gap is formed between the two baffles, and through the gap, a penetrating space can be provided for the antenna unit 300, so that the antenna unit 300 is convenient to install.

The antenna element 300 is disposed in a reflective cavity, and it will be appreciated that one end of the antenna element 300 is disposed within the reflective cavity and coupled to the feed structure 200 and the base plate 110 of the reflector 100, respectively, and the other end extends outside the reflective cavity. The antenna unit 300 may be provided in plurality, and the plurality of antenna units 300 may be disposed at intervals along the extension direction of the reflection cavity. Preferably, a plurality of antenna elements 300 are arranged in an array along the length of the reflective cavity. In one embodiment, referring to fig. 3, 4, 12 and 13, the antenna unit 300 includes an antenna balun 310 and an array arm 320 that are independently disposed. Specifically, the antenna balun 310 and the array arm 320 are respectively provided with at least two. Preferably, the antenna balun 310 is provided with two and the array arm 320 is symmetrically provided with four.

The insulating mount 400 is used to assemble the antenna unit 300 and fix the assembled antenna unit 300 in the reflector 100. In an embodiment, the antenna unit 300 is detachably connected with the insulating mounting frame 400, for example, by fastening and fixing, so that the welding operation of the antenna unit 300 during assembly can be replaced, welding points are reduced, energy loss is reduced, and the relative positions of various components of the antenna unit 300 are ensured not to change. In addition, the insulating mounting frame 400 is detachably connected with the bottom plate 110 of the reflector 100, for example, by clamping and fixing, so that the operation of welding the antenna unit 300 and the reflector 100 during the traditional antenna installation is omitted, the number of welding spots is further reduced, and the intermodulation index of the antenna is improved. That is, by providing the insulating mount 400, the antenna unit 300 can be fixed in the reflector 100 without using a welding operation, and further, the antenna unit 300 can be simultaneously coupled to the bottom plate 110 of the reflector 100 and the feeder structure, respectively, thereby reducing welding points and complexity of an assembly process. Specifically, each antenna unit 300 is correspondingly provided with an insulating mounting rack 400, so that each antenna unit 300 can be independently mounted. Preferably, the insulating mounting frame 400 is made of plastic or hard plastic, and can be insulated from the electrical signal on the antenna unit 300, which is not limited herein. Preferably, the antenna balun 310 is coupled to the feed structure and the dipole arm 320 is coupled to the bottom plate 110 of the reflector 100.

In this embodiment, four array arms 320 are provided, and one insulating mount 400 may be provided, and four array arms 320 are simultaneously assembled on the insulating mount 400; the two insulating mounting frames 400 can also be arranged, the two insulating mounting frames 400 are clamped and connected, an installation space is formed by enclosing, the array arms 320 are arranged in the installation space, and the two array arms 320 are respectively assembled and fixed on each insulating mounting frame 400.

Further, in an embodiment of the present application, fig. 2, 5, 6, 7 and 17, the insulating mounting frame 400 includes a base 410 and a first buckle 420 connected to the base 410, and the reflector 100 is provided with a first buckle 140, and the first buckle 420 is engaged with the first buckle 140.

In this embodiment, the insulating mount 400 includes a base 410 and a first catch 420. Specifically, the base 410 is a main structure of the insulating mount 400, can provide a mounting position, and has a certain bearing force. The shape of the base 410 may be rectangular, square, or other irregular shapes, which are not limited herein. Preferably, the middle part of the base 410 is provided with an installation space, and the antenna unit 300 is detachably disposed in the installation space. The first buckle 420 is disposed on the outer side of the base 410, and is connected to the base 410 for being clamped with the bottom plate 110 of the reflector 100.

Specifically, the bottom plate 110 of the reflector 100 is provided with a first buckling position 140 correspondingly matched with the first buckle 420, the first buckle 420 is clamped into the first buckling position 140, so that the base 410 and the bottom plate 110 of the reflector 100 can be fixed, the first buckle 420 is separated from the first buckling position 140, and the base 410 and the bottom plate 110 of the reflector 100 can be detached. By means of the arrangement, the first buckle 420 is matched with the first buckle position 140, and therefore detachable connection between the base 410 and the reflector 100 can be achieved conveniently. Preferably, the first fastening portion 140 may be a bayonet or a slot, which is not limited herein. In an embodiment, a plurality of first buckles 420 are provided, and the plurality of first buckles 420 are spaced apart along the circumference of the base 410. Further, the plurality of buckles are arranged on two opposite sides of the base 410, so that the use quantity of the first buckles 420 can be reduced, the product cost can be reduced, and avoidance can be provided at the position where the first buckles 420 are not arranged, so that the base 410 can be assembled with other parts conveniently. Preferably, four first buckles 420 are provided, and two first buckles 420 are respectively provided on two opposite sides of the base 410.

It should be noted that, when the insulating mounting frames 400 are provided in plurality, the bases 410 in two adjacent insulating mounting frames 400 are clamped, and the two bases 410 enclose the installation space. Preferably, the base 410 is provided with two.

In an embodiment, the first buckle 420 and the base 410 are integrally formed, so that the process flow can be simplified, and the overall structural strength can be improved.

Further, in an embodiment of the present application, referring to fig. 5, the first buckle 420 includes a connection portion 421, an operation portion 422 and a chuck 423, the operation portion 422 is disposed at a distance from a periphery of the base 410, the connection portion 421 connects the operation portion 422 and the chuck 423, the chuck 423 is disposed at an end of the operation portion 422 away from the connection portion 421 and extends in a direction away from the base 410, and the chuck 423 and the base 410 are clamped on opposite sides of the reflector 100 in a matching manner.

In this embodiment, the first buckle 420 includes a connection portion 421, an operation portion 422, and a chuck 423. The connection portion 421 is directly connected to the base 410, and extends away from the base 410. The connecting portion 421 has an operating portion 422 at one end thereof facing away from the base 410, the operating portion 422 extending in a direction toward the bottom plate 110 of the reflector 100, the operating portion 422 being spaced apart from the base 410 to form a buffer space therebetween, and the operating portion 422 being capable of being bent in a direction toward the base 410 by pressing the operating portion 422. The chuck 423 is disposed at an end of the operating portion 422 away from the connecting portion 421, and extends in a direction away from the base 410. When the operation portion 422 is bent toward the direction approaching to the base 410, the clamping head 423 may pass through the first fastening portion 140 and abut against a side of the bottom plate 110 of the reflector 100 away from the base 410, and the base 410 abuts against a side of the bottom plate 110 of the reflector 100 away from the clamping head 423, that is, the base 410 abuts against opposite sides of the bottom plate 110 of the reflector 100 with the clamping head 423, so as to realize a fixed connection between the base 410 and the bottom plate 110 of the reflector 100. In an embodiment, a groove is formed on a side of the bottom plate 110 of the reflector 100 facing away from the base 410, the groove has a bottom surface, the first fastening portion 140 penetrates through the bottom surface, and the chuck 423 penetrates through the first fastening portion 140 and then enters the groove and abuts against the bottom surface. So set up, can hide dop 423 in the recess, prevent that dop 423 from exposing, reduce the whole thickness after reflector 100 and insulating mounting bracket 400 assembly, product structure is more small and exquisite compact.

Further, in an embodiment of the present application, referring to fig. 5, 6 and 19, the insulating mounting frame 400 further includes a second buckle 430, the second buckle 430 is connected to the base 410, and the antenna unit 300 is provided with a second buckle position 330 that is matched with the second buckle 430.

In this embodiment, in order to facilitate the detachable connection between the antenna unit 300 and the insulating mounting frame 400, a second buckle 430 is disposed on the insulating mounting frame 400, and meanwhile, a second buckle 330 is disposed on the antenna unit 300, so that the connection between the antenna unit 300 and the insulating mounting frame 400 is achieved through the cooperation of the second buckle 430 and the second buckle 330. It is understood that the antenna unit 300 is fastened to the insulating mounting frame 400. The second fastening portion 330 may be a fastening hole or a fastening slot, which is not limited herein. Preferably, the second fastening portion 330 is disposed on the array arm 320.

Further, in an embodiment of the present application, referring to fig. 5, the second buckle 430 includes a post 431 and an extension portion 432 disposed on the post 431, and the extension portion 432 is engaged with the second buckle 330.

In this embodiment, the second buckle 430 includes a pillar 431 and an extension portion 432, one end of the pillar 431 is connected to the base 410, and the other end extends in a direction away from the base 410, and the extension direction of the pillar 431 is parallel to the extension direction of the antenna unit 300. The extension 432 is provided on a side of the pillar 431 facing the antenna unit 300, and extends in a direction approaching the antenna unit 300. Preferably, the upright 431 is disposed at an inner wall of the installation space. In the process of inserting the array arm 320 into the installation space, the extension part 432 is firstly abutted against the surface of the array arm 320, and as the extension part 432 protrudes from the upright post 431, the insertion of the array arm 320 can drive the upright post 431 to bend from the initial position towards the direction far away from the array arm 320 until the extension part 432 is clamped into the second buckling position 330 of the array arm 320, the upright post 431 returns to the initial position, and the movement of the array arm 320 in the first direction can be limited by the cooperation of the extension part 432 and the second buckling position 330, so that the assembly of the array arm 320 and the insulating mounting frame 400 is realized. Preferably, the first direction is a vertical direction. When the array arm 320 needs to be detached, a force is applied to the upright 431 to drive the upright 431 to bend away from the array arm 320, and the extension portion 432 is separated from the second fastening portion 330, so that the array arm 320 is pulled away from the installation space.

In an embodiment, a plurality of second buckles 430 are disposed at intervals along the circumferential direction of the installation space, and each of the array arms 320 may be correspondingly provided with a plurality of second buckles 430 to improve the reliability of fixation, and a plurality of array arms 320 may be disposed in the installation space, and each of the array arms 320 is correspondingly provided with a second buckle 430. The specific arrangement of the second buckle 430 is not limited herein, and may be selected and set in actual use.

Further, in an embodiment of the present application, referring to fig. 6, a first positioning portion 440 is provided on the base 410, and a second positioning portion 340 that is matched with the first positioning portion 440 is provided on the antenna unit 300.

In this embodiment, for facilitating positioning when the antenna unit 300 and the insulating mounting frame 400 are assembled, the first positioning portion 440 is disposed on the base 410, and the second positioning portion 340 is disposed on the antenna unit 300, so that accurate positioning between the antenna unit 300 and the insulating mounting frame 400 is achieved through cooperation of the first positioning portion 440 and the second positioning portion 340, and accuracy in assembling the two is improved. Specifically, the first positioning portion 440 is a positioning pin, while the second positioning portion 340 is a positioning hole, or alternatively, the first positioning portion 440 is a positioning hole, while the second positioning portion 340 is a positioning pin. Preferably, the second positioning portion 340 is disposed on the array arm 320. Specifically, referring to fig. 7, 8 and 19, the array sub-arm 320 includes a first sub-arm 321, a second sub-arm 322 and a third sub-arm 323, the first sub-arm 321 extends along a first direction, the second fastening portion 330 is disposed on the first sub-arm 321, the second sub-arm 322 is bent and connected to one end of the first sub-arm 321 near the bottom plate 110 of the reflector 100, the second sub-arm 322 extends in a direction away from the installation space, the second positioning portion 340 is disposed on the second sub-arm 322, the third sub-arm 323 is bent and connected to one end of the first sub-arm 321 far from the bottom plate 110 of the reflector 100, and the extending direction of the third sub-arm 323 is the same as the extending direction of the first sub-arm 321. When the array sub-arm 320 is assembled, the third sub-arm 323 passes through the installation space to the side of the base 410 away from the bottom plate 110 of the reflector 100, then the first positioning portion 440 and the second positioning portion 340 are used to position the second sub-arm 322 and the base 410, and finally the first sub-arm 321 in the installation space moves towards the direction close to the upright post 431, so that the extension portion 432 is clamped into the second buckling position 330 on the first sub-arm 321. So set up, second sub-arm 322 and base 410 butt can restrict second sub-arm 322 to continue to be moved towards the direction that is close to stand 431, and extension 432 and the second knot position 330 joint on the first sub-arm 321 can restrict second sub-arm 322 to be moved towards the direction that is kept away from base 410 to realize the location and the fixed of array arm 320 in two opposite directions, and then realize the accurate assembly of array arm 320 and base 410.

Further, in an embodiment of the present application, referring to fig. 1, the base station antenna further includes an insulating holder 500, the insulating holder 500 is disposed on a side of the base 410 facing the second buckle 430, and the antenna unit 300 is detachably connected to the insulating holder 500.

In this embodiment, in order to facilitate the assembly of the antenna unit 300 and improve the fixing firmness, an insulating fixing frame 500 is provided, and the insulating fixing frames 500 are arranged on one side of the base 410 at intervals and are located on one side of the base 410 facing the second buckle 430, and the antenna unit 300 is detachably connected with the insulating fixing frame 500. Preferably, the antenna balun 310 in the antenna unit 300 is detachably connected to the insulating holder 500, i.e., the antenna balun 310 is mounted on the insulating holder 500. It will be appreciated that one end of the antenna balun 310 is detachably connected to the insulating holder 500 and the other end of the antenna balun 310 extends to the mounting space and is coupled to the feed line structure.

Further, in an embodiment of the present application, referring to fig. 9-11, the insulating holder 500 includes a chassis 510 and a clamping structure 520 connected to the chassis 510, the chassis 510 is provided with a through hole, the clamping structure 520 is connected to an inner wall of the through hole, and the clamping structure 520 is clamped on two opposite sides of the antenna unit 300.

In this embodiment, the insulating holder 500 includes a chassis 510 and a clamping structure 520, where the chassis 510 is a main body structure and has a certain bearing capacity. The chassis 510 is provided with a through hole, and the antenna balun 310 in the antenna unit 300 extends from the through hole in a direction approaching the bottom plate 110 of the reflector 100. The clamping structure 520 is disposed on an inner wall of the through hole, and is used for clamping and fixing the antenna balun 310 in the antenna unit 300, so as to realize a fixed connection between the antenna balun 310 and the chassis 510. It will be appreciated that one end of the antenna balun 310 is detachably connected to the clamping structure 520 and the other end of the antenna balun 310 extends in a direction towards the reflector 100 and is coupled to the feed line structure. Specifically, the chassis 510 may be square or circular, which is not limited herein. The clamping structure 520 may be a clamp capable of clamping the antenna balun 310.

In an embodiment, a plurality of clamping structures 520 may be provided, and a plurality of clamping structures 520 are disposed at intervals along the circumference of the through hole. Specifically, each antenna balun 310 may be provided with one clamping structure 520, or may be provided with a plurality of clamping structures 520. Preferably, two clamping structures 520 are correspondingly disposed on one antenna balun 310, and the two clamping structures 520 are disposed on two opposite inner walls of the through hole so as to clamp two different positions of the antenna balun 310, thereby improving reliability of clamping and fixing.

In another embodiment, two antenna balun 310 are provided, and each antenna balun 310 is correspondingly provided with at least one clamping structure 520. Preferably, two clamping structures 520 are provided for each antenna balun 310. Specifically, the clamping structures 520 corresponding to the different antenna balun 310 are disposed at intervals in the first direction. Wherein the first direction is a vertical direction. The clamping structures 520 of the different antenna balun 310 are correspondingly arranged, and have a height difference in the vertical direction, so that the two antenna balun 310 are arranged in a mutually avoiding manner.

In one embodiment, there are four clamping structures 520 and two antenna balun 310, and two clamping structures 520 are provided for each antenna balun 310. Wherein, four clamping structures 520 are arranged along the circumferential array of the through hole, two adjacent clamping structures 520 are arranged in a staggered manner, and two opposite clamping structures 520 are used for clamping and fixing the same antenna balun 310. It will be appreciated that the two opposing gripping structures 520 lie in the same plane and form two distinct planes that are parallel to each other but do not coincide.

Further, in an embodiment of the present application, referring to fig. 9 and 10, the clamping structure 520 includes a first clamping portion 521 and a second clamping portion 522, the first clamping portion 521 and the second clamping portion 522 are spaced apart to form a clamping space 523, and the second clamping portion 522 is provided with a deformation space 524 communicating with the clamping space 523.

In this embodiment, the clamping structure 520 includes a first clamping portion 521 and a second clamping portion 522, where the second clamping portion 522 and the first clamping portion 521 are disposed at intervals in a first direction to form a clamping space 523, and a deformation space 524 in communication with the clamping space 523 is disposed on the second clamping portion 522, so that the antenna balun 310 moves from the deformation space 524 into the clamping space 523.

Specifically, referring to fig. 18, the antenna balun 310 includes a coupling portion 311, a cross arm 312 and a longitudinal arm 313, wherein two ends of the cross arm 312 are respectively provided with a longitudinal arm 313, the longitudinal arm 313 is connected with the cross arm 312 in a bending manner, one of the two longitudinal arms 313 is provided with the coupling portion 311, and the coupling portion 311 is disposed at one end of the longitudinal arm 313 away from the cross arm 312 and extends in a direction away from the other longitudinal arm 313. Preferably, the inner diameter of one end of the deformation space 524 close to the clamping space 523 is smaller than the inner diameter of one end of the deformation space 524 far away from the clamping space 523, or a supporting protrusion is arranged on the inner wall of the deformation space 524 and is arranged at one end of the deformation space 524 close to the clamping space 523, so that the cross arm 312 of the antenna balun 310 can move from the deformation space 524 to the clamping space 523, and the cross arm 312 of the antenna balun 310 is clamped at two opposite sides of the cross arm 312 through the first clamping part 521 and the second clamping part 522, so that the fixation of the antenna balun 310 is realized.

It can be understood that the inner diameter of the end of the deformation space 524 near the clamping space 523 is smaller than the outer diameter of the cross arm 312 in the initial state, the two opposite side walls of the end of the deformation space 524 near the clamping space 523 bend away from each other under the action of external force to enable the cross arm 312 to pass through, the cross arm 312 returns to the original state after passing through, and the second clamping portion 522 abuts against the side surface of the cross arm 312 facing the trailing arm 313.

Preferably, referring to fig. 9 and 10, the first clamping portion 521 includes a first clamping plate 5211 and a second clamping plate 5212, wherein the first clamping plate 5211 is connected to an inner wall of the through hole and extends along a first direction, and the second clamping plate 5212 is bent at an end of the first clamping plate 5211 away from the insulating mounting frame 400 and extends in a direction away from the first clamping plate 5211. The second clamping portion 522 includes two sets of clamping arms disposed oppositely, each set of clamping arms includes a first supporting sub-arm 5221, a second supporting sub-arm 5222 and a supporting head 5223, wherein the first supporting sub-arm 5221 is bent and connected to one end of the first clamping plate 5211 away from the second clamping plate 5212 and extends in a direction away from the first clamping plate 5211, the second supporting sub-arm 5222 is bent and connected to the first supporting sub-arm 5221 and extends in a direction close to the second clamping plate 5212, and the supporting head 5223 is bent and connected to one end of the second supporting sub-arm 5222 close to the second clamping plate 5212 and is disposed at intervals with the second clamping plate 5212, so as to form a clamping space 523. The two supporting heads 5223 of the two groups of clamping arms extend towards the direction approaching each other and do not intersect, and the second supporting sub-arms 5222 of the two groups of clamping arms are arranged at intervals to jointly form a deformation space 524 communicated with the clamping space 523.

Further, in an embodiment of the present application, referring to fig. 9 and 10, a hooking portion 530 is provided on the chassis 510, and a hook 350 is provided on the array arm 320, where the hooking portion 530 cooperates with the hook 350 to clamp the plurality of array arms 320.

In this embodiment, in order to facilitate clamping of the plurality of array arms 320, a hooking portion 530 is provided on the chassis 510, and a hooking portion 350 is provided on the array arm 320. Preferably, the hooking position 350 is provided on the third sub-arm 323. After the antenna balun 310 and the insulating fixing frame 500 are assembled, the third sub-arm 323 of the array sub-arm 320 swings towards the direction close to the chassis 510, and the hooking part 530 hooks the hooking position 350 on the third sub-arm 323, so that the third sub-arm 323 has a tendency to move towards the direction close to the chassis 510, and the insulating fixing frame 500, the insulating mounting frame 400, the antenna balun 310 and the array sub-arm 320 are assembled and fixed to form a complete antenna unit 300. The hooking portions 530 are disposed at intervals along the circumferential direction of the chassis 510, and each of the array arms 320 may respectively correspond to the hooking portions 530, so as to improve the fixing reliability of the array arms 320. It will be appreciated that by providing the catch 530, the plurality of array arms 320 can be compactly arranged in a direction approaching the chassis 510, preventing dispersion from each other. Specifically, the hooking portion 530 includes a hook arm connected to the chassis 510 and extending in a direction away from the through hole, and a hook head bent at an end of the hook arm away from the chassis 510 and extending in a direction away from the hook arm, and engaged with the hook bit 350.

Further, in an embodiment of the present application, referring to fig. 6 and 18, a third positioning portion 450 is provided on the base 410, a fourth positioning portion 360 is provided on the antenna balun 310, and the third positioning portion 450 is matched with the fourth positioning portion 360.

In this embodiment, in order to facilitate accurate positioning of the antenna balun 310 and the base 410, a third positioning portion 450 is provided on the base 410, and a fourth positioning portion 360 is provided on the antenna balun 310, and after the third positioning portion 450 and the fourth positioning portion 360 are matched, the antenna balun 310 and the insulating fixing frame 500 are assembled. Preferably, the third positioning portion 450 is disposed on a side of the base 410 facing the bottom plate 110 of the reflector 100, and the fourth positioning portion 360 is disposed on the coupling portion 311 of the antenna balun 310. Specifically, the third positioning portion 450 is a protrusion, while the fourth positioning portion 360 is a groove, or alternatively, the third positioning portion 450 is a groove, while the fourth positioning portion 360 is a protrusion. The specific arrangement of the third positioning portion 450 and the fourth positioning portion 360 is not limited herein.

Further, in one embodiment of the present application, the reflector 100 is provided with an opening communicating with the reflective cavity.

In this embodiment, the reflector 100 is provided with an opening communicating with the reflective cavity, so that the reflective cavity is open, the overall weight of the reflector 100 can be reduced to a great extent, and the antenna unit 300 can be directly mounted on the bottom plate 110 of the reflector 100 through the insulating mounting frame 400, so that the height of the entire base station antenna is reduced. Preferably, two side plates 120 of the reflector 100 are disposed opposite to each other, and the two side plates 120 and the bottom plate 110 together enclose a reflective cavity having three side openings, so that the reflective cavity has an open or semi-open structure.

Further, referring to fig. 17, in an embodiment of the present application, a chute 130 is disposed on an inner wall of the reflective cavity, and the feeding structure 200 is slidably connected to the chute 130.

In this embodiment, in order to facilitate installation of the feeding structure 200, the chute 130 is disposed on the inner wall of the reflective cavity, and the feeding structure 200 is slidably matched with the chute 130, so that the feeding structure 200 and the reflector 100 can be assembled and disassembled. It will be appreciated that the feed structure 200 may be slid into the reflective cavity or the feed structure 200 may be slid out of the reflective cavity through the chute 130. Preferably, two opposite side walls of the reflecting cavity are respectively provided with a chute 130. Specifically, referring to fig. 17, two ribs 121 are disposed on the side wall of the reflective cavity at intervals, and the sliding groove 130 is formed at the interval between the two ribs 121.

Further, in an embodiment of the present application, referring to fig. 14 to 16, the feeding structure 200 includes a circuit board 210 suspended in the reflective cavity and a feeding strip line 220 disposed on the circuit board 210, a coupling point of the feeding strip line 220 is coupled to the antenna balun 310, a window 230 is disposed on the circuit board 210 to suspend the coupling point of the feeding strip line 220, and the base station antenna further includes a supporting frame 240, where the supporting frame 240 is detachably disposed on the window 230 to support a ground side of the feeding strip line 220.

In this embodiment, the circuit board 210 is slidably connected with the chute 130, the feeding strip line 220 is electrically connected with the circuit board 210, and the feeding strip line 220 is suspended at the opening 230 by providing the opening 230 on the circuit board 210, so that air is used as a medium for transmitting electromagnetic waves, and the path loss is effectively reduced. In addition, the antenna unit 300 can be passed through by the sunroof provided, and the antenna unit 300 is conveniently assembled on the bottom plate 110 of the reflector 100 through the insulating mounting frame 400. Since the antenna balun 310 is to be coupled to the feed strip line 220, the feed strip line 220 is easily bent at a floating location to affect the coupling connection with the antenna balun 310. For this reason, the supporting frame 240 is disposed at the window 230, and the supporting frame 240 is supported on the side of the feeding strip line 220 facing away from the antenna balun 310, so as to provide support for the feeding strip line 220, prevent the feeding strip line 220 from bending, and ensure the stable spacing of the coupling connection. Preferably, the supporting frame 240 is detachably connected to the circuit board 210, for example, by a clamping or screwing manner, which is not limited herein.

Further, referring to fig. 16, in an embodiment of the present application, a fifth positioning portion 250 is provided on the support frame 240, and the fifth positioning portion 250 is matched with the third positioning portion 450.

In this embodiment, in order to improve the accuracy of assembling the antenna balun 310, the fifth positioning portion 250 is provided on the supporting frame 240, and by matching the fifth positioning portion 250 with the third positioning portion 450, it is preferable to improve the accuracy of the mounting direction, the fifth positioning portion 250 is a positioning through hole, and the third positioning portion 450 is a positioning post, and the positioning post passes through the positioning through hole, so as to realize positioning during assembling the antenna balun 310.

The foregoing description is only the preferred embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application, and all the equivalent structural changes made by the descriptions of the embodiments of the present application and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the embodiments of the present application.

Claims

1. A base station antenna, the base station antenna comprising:

a reflector, the reflector having a reflective cavity formed therein;

A feed structure suspended within the reflective cavity;

an antenna unit disposed in the reflective cavity, and

The antenna unit is detachably arranged on the insulating mounting frame, and the insulating mounting frame is arranged in the reflecting cavity and is detachably connected with the reflector, so that the feed structure and the reflector are respectively coupled and connected with the antenna unit;

The feed structure is including the suspension in the circuit board in reflection chamber and locate the feed strip line of circuit board, the antenna unit includes independent antenna balun and the array arm that sets up, the array arm with reflector coupling connection, the coupling point of feed strip line with antenna balun coupling connection, be equipped with on the circuit board and open the window and make the coupling point suspension of feed strip line, the base station antenna still includes the braced frame, the braced frame is located open the window with support in the downside of feed strip line.

2. The base station antenna of claim 1, wherein the insulating mounting comprises a base and a first buckle connected with the base, the reflector is provided with a first buckle position, and the first buckle is clamped with the first buckle position.

3. The base station antenna according to claim 2, wherein the first fastener comprises a connecting portion, an operating portion and a chuck, the operating portion is disposed at intervals with a peripheral side of the base, the connecting portion connects the operating portion and the chuck, the chuck is disposed at an end of the operating portion away from the connecting portion and extends in a direction away from the base, and the chuck and the base are clamped on opposite side surfaces of the reflector in a matching manner.

4. The base station antenna of claim 2, wherein the insulating mounting frame further comprises a second buckle, the second buckle is connected with the base, and a second buckle position matched with the second buckle is arranged on the antenna unit.

5. The base station antenna of claim 4, wherein the second clasp comprises a post and an extension on the post, the extension cooperating with the second clasp.

6. The base station antenna of claim 5, wherein a first positioning portion is provided on the base, and a second positioning portion is provided on the antenna unit, which is engaged with the first positioning portion.

7. The base station antenna of claim 6, further comprising an insulating mount disposed on a side of the base facing the second clasp, the antenna unit being removably coupled to the insulating mount.

8. The base station antenna of claim 7, wherein the insulating holder comprises a chassis and a clamping structure connected with the chassis, the chassis is provided with a through hole, the clamping structure is connected with the inner wall of the through hole, and the clamping structure is clamped on two opposite sides of the antenna unit.

9. The base station antenna of claim 8, wherein the clamping structure comprises a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion being spaced apart to form a clamping space, the second clamping portion being provided with a deformation space in communication with the clamping space.

10. The base station antenna of claim 9, wherein the second fastening portion and the second positioning portion are disposed on the array arm, the first clamping portion and the second clamping portion clamp the antenna balun, at least two antenna balun and the array arm are symmetrically disposed respectively, two bases are disposed, the two bases are detachably connected to form an installation space, and the antenna balun and the array arm are disposed in the installation space.

11. The base station antenna of claim 10, wherein the chassis is provided with a hooking portion, and the array arm is provided with a hooking position, and the hooking portion cooperates with the hooking position to clamp the plurality of array arms.

12. The base station antenna of claim 10, wherein a third positioning portion is provided on the base, a fourth positioning portion is provided on the antenna balun, and the third positioning portion is mated with the fourth positioning portion.

13. The base station antenna of claim 12, wherein the reflector is provided with an opening in communication with the reflective cavity.

14. The base station antenna of claim 13, wherein the inner wall of the reflective cavity is provided with a chute, and the feed structure is slidably coupled to the chute.

15. The base station antenna of claim 14, wherein the support frame is removably disposed in the fenestration.

16. The base station antenna of claim 15, wherein a fifth positioning portion is provided on the support frame, the fifth positioning portion being mated with the third positioning portion.