Base station antenna

Abstract

The present invention discloses a base station antenna, which includes a reflector, a reflection cavity is formed inside the reflector; a feeding structure, suspended in the reflection cavity; an antenna element, arranged in the reflection cavity; and an insulating mounting bracket, the antenna element is detachably arranged on the insulating mounting bracket, the insulating mounting bracket is arranged in the reflection cavity and is detachably connected to the reflector, so that the feeding structure and the reflector are respectively coupled to the antenna element. The present invention provides a base station antenna, which solves the technical problem of a large number of solder joints in the existing antenna array.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and particularly to a base station antenna. Background Art

[0002] With the development of mobile communication technology, most operators have put forward higher requirements for base station antennas. Conventional single-frequency or dual-frequency antennas and single arrays far cannot meet the needs of users in most areas. Therefore, when building base stations, operators tend to choose large-scale multiple-input multiple-output (MIMO) technology antenna arrays to improve base station capacity and versatility. Compared with traditional 4G antenna products with 2 transmit and 2 receive (2T2R) or 8T8R, the structure of MIMO technology antenna arrays is more compact, and the number of array oscillator units is larger. However, more array oscillator units increase the complexity of the feeding line, and the complex feeding line will bring more welding points, making the total number of welding points of the entire antenna extremely large, which has an adverse impact on the intermodulation index of the antenna. Summary of the Invention

[0003] The main purpose of this application is to provide a base station antenna, aiming to solve the technical problem of the large number of welding points in the existing antenna array.

[0004] According to one aspect of the embodiments of this application, this application provides a base station antenna, which includes:

[0005] A reflector, with a reflection cavity formed inside the reflector;

[0006] A feeding structure, suspended in the reflection cavity;

[0007] An antenna unit, arranged in the reflection cavity; and

[0008] An insulating mounting bracket, the antenna unit is detachably arranged on the insulating mounting bracket, the insulating mounting bracket is arranged in the reflection cavity and is detachably connected to the reflector, so that the feeding structure and the reflector are respectively coupled to the antenna unit.

[0009] In one technical solution proposed by the present application, compared with the prior art, an insulating mounting bracket is used to directly fix the antenna unit in the reflection cavity within the reflector, enabling the antenna unit to be coupled and connected to the feeding structure and the reflector respectively. This eliminates the operation of welding the antenna unit to the reflector during traditional antenna installation, reduces the number of solder joints, lowers energy loss, and is conducive to improving the intermodulation index of the antenna. Moreover, the antenna unit is detachably arranged on the insulating mounting bracket, and the insulating mounting bracket is directly used to fix each component of the antenna unit, ensuring that the relative positions of the components do not change, improving the reliability of fixation, and replacing the welding fixation operation between the components, which can further reduce the number of solder joints and thus improve the intermodulation index of the antenna. The technical solution proposed by the present application uses an insulating mounting bracket to install and fix the antenna unit, without the need for any welding operation, which can reduce the process steps in the antenna assembly process, lower the assembly complexity, improve the assembly efficiency, and at the same time eliminate the adverse effects of welding on the antenna intermodulation index. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0011] Figure 1 Schematic structural diagram of an angle of the base station antenna embodiment of the present application;

[0012] Figure 2 Schematic structural diagram of another angle of the base station antenna embodiment of the present application;

[0013] Figure 3 For Figure 1 Partial enlarged structural diagram of part A in

[0014] Figure 4 Partial structural schematic of the base station antenna embodiment of the present application Figure 1 ;

[0015] Figure 5 Schematic structural diagram of an angle of the insulating mounting bracket in the base station antenna embodiment of the present application;

[0016] Figure 6 Schematic structural diagram of another angle of the insulating mounting bracket in the base station antenna embodiment of the present application;

[0017] Figure 7 Partial structural schematic of the base station antenna embodiment of the present application Figure 2 ;

[0018] Figure 8 Partial structural schematic of the base station antenna embodiment of the present application Figure 3 ;

[0019] Figure 9 Schematic diagram of the structure of the insulating fixing bracket of the base station antenna embodiment of the present application from one angle;

[0020] Figure 10 Schematic diagram of the structure of the insulating fixing bracket of the base station antenna embodiment of the present application from another angle;

[0021] Figure 11 Schematic diagram of the cross-sectional structure of the base station antenna embodiment of the present application;

[0022] Figure 12 is Figure 11 Partial enlarged structure schematic of part B in;

[0023] Figure 13 is Figure 11 Partial enlarged structure schematic of part C in;

[0024] Figure 14 Schematic diagram of the structure of the feeding structure of the base station antenna embodiment of the present application from one angle;

[0025] Figure 15 Schematic diagram of the structure of the feeding structure of the base station antenna embodiment of the present application from another angle;

[0026] Figure 16 is Figure 15 Partial enlarged structure schematic of part D in;

[0027] Figure 17 Schematic diagram of the structure of the reflector of the base station antenna embodiment of the present application;

[0028] Figure 18 Schematic diagram of the structure of the antenna balun of the base station antenna embodiment of the present application;

[0029] Figure 19 Schematic diagram of the structure of the dipole arm of the base station antenna embodiment of the present application.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100. Reflector; 110. Bottom plate; 120. Side plate; 121. Convex rib; 122. Partition board; 130. Chute; 140. First buckle position; 200. Feeding structure; 210. Circuit board; 220. Feeding strip line; 230. Window; 240. Support frame; 250. Fifth positioning part; 300. Antenna unit; 310. Antenna balun; 311. Coupling part; 312. Cross arm; 313. Longitudinal arm; 320. Dipole arm; 321. First sub-arm; 322. Second sub-arm; 323. Third sub-arm; 330. Second buckle position; 340. Second positioning part; 350. Hook position; 360. Fourth positioning part; 400. Insulating mounting bracket; 410. Base; 420. First buckle; 421. Connecting part; 422. Operating part; 423. Chuck; 430. Second buckle; 431. Column; 432. Extension part; 440. First positioning part; 450. Third positioning part; 500. Insulating fixing bracket; 510. Chassis; 520. Clamping structure; 521. First clamping part; 5211. First clamping plate; 5212. Second clamping plate; 522. Second clamping part; 5221. First supporting sub-arm; 5222. Second supporting sub-arm; 5223. Support head; 523. Clamping space; 524. Deformation space; 530. Hook holding part.

[0032] The realization, functional features and advantages of the objectives of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the embodiments of the present application.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, in the embodiments of the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the embodiments of the present application, unless otherwise clearly specified or limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0037] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present application.

[0038] With the advent of the 5G high-speed information era, compared with traditional 4G antenna products with 2T2R or 8T8R, the Massive MIMO (Massive Multiple Input Multiple Output) antenna array has a more compact structure and more array oscillator units, which is beneficial to improving the base station capacity and versatility, so as to meet the needs of users in most areas.

[0039] However, setting more array oscillator units increases the complexity of the feeding lines. Taking the large-scale array antenna with the mainstream 32T scheme in current 5G base stations as an example, it is usually composed of 2 rows and 16 columns of antenna sub-arrays arranged according to a certain rule, and the corresponding is 32 feeding lines. At present, the industry generally adopts the air strip line feeding scheme to reduce the line loss, and the air strip line feeding scheme is connected through welding points during assembly. The welding points will cause partial energy loss, the feeding performance will be uncertain, and it will also bring inconvenience to the later installation. In addition, the complex feeding lines will bring more welding points, higher line losses, higher manufacturing costs, and more complex assembly processes. The number of welding points of the entire antenna is extremely large, which has an adverse effect on the intermodulation index of the antenna.

[0040] In view of this, the embodiments of the present application provide a base station antenna, which uses an insulating mounting bracket to install and fix the antenna unit, does not require any welding operations, can reduce the process steps in the process of assembling the antenna, reduce the complexity of assembly, improve the assembly efficiency, and at the same time eliminate the adverse impact of welding on the antenna intermodulation index.

[0041] In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings.

[0042] Such as Figure 1 and Figure 2As shown in the figure, an embodiment of the present application provides a base station antenna, which includes:

[0043] A reflector 100, with a reflection cavity formed inside the reflector 100;

[0044] A feeding structure 200, suspended in the reflection cavity;

[0045] An antenna unit 300, arranged in the reflection cavity; and

[0046] An insulating mounting bracket 400, on which the antenna unit 300 is detachably arranged. The insulating mounting bracket 400 is arranged in the reflection cavity and is detachably connected to the reflector 100, so that the feeding structure 200 and the reflector 100 are respectively coupled to the antenna unit 300.

[0047] In the technical solution adopted in this embodiment, the insulating mounting bracket 400 is used to directly fix the antenna unit 300 in the reflection cavity inside the reflector 100, so that the antenna unit 300 is respectively coupled to the feeding structure 200 and the reflector 100, eliminating the operation of welding the antenna unit 300 to the reflector 100 during the installation of the traditional antenna. This can reduce the number of solder joints, lower the energy loss, and is beneficial to improving the intermodulation index of the antenna. Moreover, the antenna unit 300 is detachably arranged on the insulating mounting bracket 400, and the insulating mounting bracket 400 is directly used to fix each component in the antenna unit 300, ensuring that the relative positions between the components will not change, improving the reliability of the fixation, and replacing the welding fixation operation between the components, which can further reduce the number of solder joints, and thus improve the intermodulation index of the antenna. A technical solution proposed in the present application uses the insulating mounting bracket 400 to install and fix the antenna unit 300, without any welding operation, which can reduce the process steps in the antenna assembly process, reduce the complexity of the assembly, improve the assembly efficiency, and at the same time eliminate the influence of welding on the intermodulation index of the antenna.

[0048] Specifically, the base station antenna includes a reflector 100, a feeding structure 200, an antenna unit 300, and an insulating mounting bracket 400. The material of the reflector 100 is metal, and a reflection cavity is formed inside the reflector 100. It can be integrally formed by the pultrusion process, with low processing difficulty and high consistency. Preferably, referring to Figure 17 , the reflector 100 includes a bottom plate 110 and side plates 120 connected to the bottom plate 110. The side plates 120 and the bottom plate 110 cooperate to jointly enclose the reflector 100 with a reflection cavity. In one embodiment, multiple reflectors 100 can be provided, and the same side plate 120 can be shared between two adjacent reflectors 100, which is not limited herein.

[0049] The feeding structure 200 is disposed in the reflection cavity and suspended therein. The feeding structure 200 can be a PCB board or a metal strip line. By using air as the medium for electromagnetic wave transmission, the circuit loss can be effectively reduced. It can be understood that the feeding structure 200 provided in this embodiment adopts the working principle of an air stripline, which will not be elaborated here. Refer to Figure 17 , the air stripline requires the presence of metal grounds above and below the feeder. For this reason, partition plates 122 are further provided on the side plates 120. The partition plates 122 and the bottom plate 110 are disposed on the upper and lower sides of the feeding structure 200 and jointly form the above-mentioned metal ground to meet the working conditions of the air stripline. Preferably, one partition plate 122 is provided on each of the two opposite side plates 120 and extends in a direction approaching each other but does not intersect, that is, a gap is formed between the two partition plates. Through the gap, a through space can be provided for the antenna unit 300, which is convenient for the installation of the antenna unit 300.

[0050] The antenna unit 300 is disposed in the reflection cavity. It can be understood that one end of the antenna unit 300 is in the reflection cavity and is respectively coupled to the feeding structure 200 and the bottom plate 110 of the reflector 100, and the other end extends to the outside of the reflection cavity. Multiple antenna units 300 can be provided, and the multiple antenna units 300 are arranged at intervals along the extension direction of the reflection cavity. Preferably, the multiple antenna units 300 are arranged in an array along the length direction of the reflection cavity. In one embodiment, refer to Figure 3 , Figure 4 , Figure 12 and Figure 13 , the antenna unit 300 includes an independently provided antenna balun 310 and a dipole arm 320. Specifically, at least two antenna baluns 310 and dipole arms 320 are respectively provided. Preferably, two antenna baluns 310 are provided, and four dipole arms 320 are symmetrically provided.

[0051] The insulating mounting bracket 400 is used to assemble the antenna unit 300 and fix the assembled antenna unit 300 inside the reflector 100. In one embodiment, the antenna unit 300 is detachably connected to the insulating mounting bracket 400, for example, by snap fixation. In this way, the welding operation during the assembly of the antenna unit 300 can be replaced, the number of welding points can be reduced, the energy loss can be reduced, and the relative positions of the various components of the antenna unit 300 can be ensured not to change. In addition, the insulating mounting bracket 400 is detachably connected to the bottom plate 110 of the reflector 100, for example, by snap fixation, eliminating the operation of welding the antenna unit 300 to the reflector 100 during the traditional antenna installation, further reducing the number of solder joints and being beneficial to improving the intermodulation index of the antenna. That is to say, through the setting of the insulating mounting bracket 400, the antenna unit 300 can be fixed inside the reflector 100 without using welding operation. Moreover, the antenna unit 300 can be respectively coupled and connected to the bottom plate 110 of the reflector 100 and the feeder structure synchronously, reducing the number of welding points and also reducing the complexity of the assembly process. Specifically, one insulating mounting bracket 400 is correspondingly provided for each antenna unit 300, so that the separate and independent installation of each antenna unit 300 can be realized. Preferably, the material of the insulating mounting bracket 400 is plastic or hard plastic, which can insulate and isolate the electrical signals on the antenna unit 300 from each other, and this is not limited herein. Preferably, the antenna balun 310 is coupled to the feeder structure, and the dipole arm 320 is coupled to the bottom plate 110 of the reflector 100.

[0052] In this embodiment, four dipole arms 320 are provided, and one insulating mounting bracket 400 can be provided, and the four dipole arms 320 are assembled on the insulating mounting bracket 400 at the same time; two insulating mounting brackets 400 can also be provided, the two insulating mounting brackets 400 are snap-connected and enclose an installation space, and the dipole arms 320 are arranged in the installation space, and two dipole arms 320 are respectively assembled and fixed on each insulating mounting bracket 400.

[0053] Further, in one embodiment of the present application, Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 17 , the insulating mounting bracket 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 position 140, and the first buckle 420 is snap-connected to the first buckle position 140.

[0054] In this embodiment, the insulating mounting bracket 400 includes a base 410 and a first buckle 420. Specifically, the base 410 serves as the main structure of the insulating mounting bracket 400, which can provide a mounting position and has a certain load-bearing capacity. The shape of the base 410 can be rectangular, square, or other irregular shapes, which is not limited herein. Preferably, an installation space is provided in the middle of the base 410, and the antenna unit 300 is detachably arranged in the installation space. The first buckle 420 is arranged on the outer side of the base 410 and is connected to the base 410 for clamping with the bottom plate 110 of the reflector 100.

[0055] Specifically, a first buckle position 140 corresponding to the first buckle 420 is provided on the bottom plate 110 of the reflector 100. When the first buckle 420 is snapped into the first buckle position 140, the fixation between the base 410 and the bottom plate 110 of the reflector 100 can be realized; when the first buckle 420 is disengaged from the first buckle position 140, the disassembly between the base 410 and the bottom plate 110 of the reflector 100 can be realized. With such a setting, through the cooperation of the first buckle 420 and the first buckle position 140, the detachable connection between the base 410 and the reflector 100 can be conveniently realized. Preferably, the first buckle position 140 can be a bayonet or a card slot, which is not limited herein. In one embodiment, a plurality of first buckles 420 are provided, and the plurality of first buckles 420 are arranged at intervals along the circumference of the base 410. Further, the plurality of buckles are arranged on the opposite sides of the base 410, which can reduce the number of first buckles 420 used and lower the product cost on the premise of ensuring the balanced force on the opposite sides of the base 410, and also provide an avoidance position at the position where the first buckle 420 is not provided, facilitating the assembly of the base 410 with other components. Preferably, four first buckles 420 are provided, and two first buckles 420 are respectively arranged on the opposite sides of the base 410.

[0056] It should be noted that when a plurality of insulating mounting brackets 400 are provided, the bases 410 in two adjacent insulating mounting brackets 400 are clamped, and the two bases 410 enclose the above-mentioned installation space. Preferably, two bases 410 are provided.

[0057] In one embodiment, the first buckle 420 is integrally formed with the base 410, which can simplify the process flow and improve the overall structural strength.

[0058] Further, in one embodiment of the present application, with reference to Figure 5 , the first buckle 420 includes a connecting portion 421, an operating portion 422, and a clamping head 423. The operating portion 422 is arranged at an interval from the circumferential side of the base 410. The connecting portion 421 connects the operating portion 422 and the clamping head 423. The clamping head 423 is arranged at one end of the operating portion 422 far from the connecting portion 421 and extends in a direction away from the base 410. The clamping head 423 and the base 410 cooperate to clamp the opposite side surfaces of the reflector 100.

[0059] In this embodiment, the first buckle 420 includes a connecting portion 421, an operating portion 422, and a chuck 423. Among them, the connecting portion 421 is directly connected to the base 410 and extends away from the base 410. An operating portion 422 is provided at one end of the connecting portion 421 facing away from the base 410. The operating portion 422 extends toward the bottom plate 110 of the reflector 100. The operating portion 422 is spaced from the base 410 to form a buffer space therebetween. By pressing the operating portion 422, the operating portion 422 can be bent toward the base 410. The chuck 423 is provided at one end of the operating portion 422 away from the connecting portion 421 and extends away from the base 410. When the operating portion 422 is bent toward the base 410, the chuck 423 can pass through the first buckle position 140 and abut against the side of the bottom plate 110 of the reflector 100 facing away from the base 410, while the base 410 abuts against the side of the bottom plate 110 of the reflector 100 facing away from the chuck 423. That is to say, the base 410 and the chuck 423 abut against the opposite two side surfaces of the bottom plate 110 of the reflector 100, thereby realizing the fixed connection between the base 410 and the bottom plate 110 of the reflector 100. In one embodiment, a groove is provided on the side surface of the bottom plate 110 of the reflector 100 facing away from the base 410. The groove has a bottom surface. The first buckle position 140 penetrates the bottom surface. After the chuck 423 passes through the first buckle position 140, it enters the groove and abuts against the bottom surface. With such a setting, the chuck 423 can be hidden in the groove, preventing the chuck 423 from being exposed, reducing the overall thickness after the reflector 100 and the insulating mounting bracket 400 are assembled, and making the product structure more compact and small.

[0060] Furthermore, in one embodiment of the present application, with reference to Figure 5 , Figure 6 and Figure 19 , the insulating mounting bracket 400 further includes a second buckle 430. The second buckle 430 is connected to the base 410, and a second buckle position 330 cooperating with the second buckle 430 is provided on the antenna unit 300.

[0061] In this embodiment, for the convenience of the detachable connection between the antenna unit 300 and the insulating mounting bracket 400, a second buckle 430 is provided on the insulating mounting bracket 400, and a second buckle position 330 is provided on the antenna unit 300 at the same time. Through the cooperation of the second buckle 430 and the second buckle position 330, the connection between the antenna unit 300 and the insulating mounting bracket 400 is realized. It can be understood that the antenna unit 300 and the insulating mounting bracket 400 are snap-fitted and fixed. Among them, the second buckle position 330 can be a card hole or a card slot, which is not limited herein. Preferably, the second buckle position 330 is provided on the dipole arm 320.

[0062] Furthermore, in one embodiment of the present application, with reference to Figure 5, the second buckle 430 includes a column 431 and an extension 432 provided on the column 431, and the extension 432 cooperates with the second buckle position 330.

[0063] In this embodiment, the second buckle 430 includes a column 431 and an extension 432. One end of the column 431 is connected to the base 410, and the other end extends away from the base 410. The extending direction of the column 431 is parallel to the extending direction of the antenna unit 300. The extension 432 is arranged on the side of the column 431 facing the antenna unit 300 and extends in the direction close to the antenna unit 300. Preferably, the column 431 is arranged on the inner wall of the installation space. During the process of inserting the dipole arm 320 into the installation space, the extension 432 first abuts against the surface of the dipole arm 320. Since the extension 432 protrudes from the column 431, the insertion of the dipole arm 320 will drive the column 431 to bend away from the dipole arm 320 from the initial position until the extension 432 snaps into the second buckle position 330 of the dipole arm 320, and the column 431 returns to the initial position. Through the cooperation between the extension 432 and the second buckle position 330, the movement of the dipole arm 320 in the first direction can be restricted, realizing the assembly of the dipole arm 320 and the insulating mounting bracket 400. Preferably, the first direction is the vertical direction. When it is necessary to disassemble the dipole arm 320, an acting force is applied to the column 431 to drive the column 431 to bend away from the dipole arm 320, and the extension 432 is separated from the second buckle position 330, and the dipole arm 320 can be withdrawn from the installation space.

[0064] In one embodiment, a plurality of second buckles 430 are arranged at intervals along the circumferential direction of the installation space. Each dipole arm 320 can be correspondingly provided with a plurality of second buckles 430 to improve the reliability of fixation; a plurality of dipole arms 320 can also be arranged in the installation space, and each dipole arm 320 is correspondingly provided with a second buckle 430. The specific setting method of the second buckle 430 is not limited herein, and it can be preferentially selected in actual applications.

[0065] Furthermore, in an embodiment of the present application, referring to Figure 6 , a first positioning portion 440 is provided on the base 410, and a second positioning portion 340 cooperating with the first positioning portion 440 is provided on the antenna unit 300.

[0066] In this embodiment, to facilitate the positioning of the antenna unit 300 during the assembly with the insulating mounting bracket 400, a first positioning portion 440 is provided on the base 410, and a second positioning portion 340 is provided on the antenna unit 300. Through the cooperation of the first positioning portion 440 and the second positioning portion 340, precise positioning between the antenna unit 300 and the insulating mounting bracket 400 is achieved, improving the accuracy during the assembly of the two. Specifically, the first positioning portion 440 is a positioning pin, and the second positioning portion 340 is a positioning hole; alternatively, the first positioning portion 440 is a positioning hole, and the second positioning portion 340 is a positioning pin. Preferably, the second positioning portion 340 is provided on the dipole arm 320. Specifically, referring to Figure 7 , Figure 8 and Figure 19 , the dipole 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 in a first direction, and a second latching portion 330 is provided on the first sub-arm 321; the second sub-arm 322 is bent and connected to one end of the first sub-arm 321 close to the bottom plate 110 of the reflector 100, and the second sub-arm 322 extends in a direction away from the installation space, and the second positioning portion 340 is provided on the second sub-arm 322; the third sub-arm 323 is bent and connected to one end of the first sub-arm 321 away 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 assembling the dipole arm 320, first pass the third sub-arm 323 through the installation space to the side of the base 410 facing away from the bottom plate 110 of the reflector 100, then use the first positioning portion 440 and the second positioning portion 340 to position the second sub-arm 322 and the base 410, and finally move the first sub-arm 321 in the installation space in a direction close to the column 431, so that the extending portion 432 snaps into the second latching portion 330 on the first sub-arm 321. With such a setting, the abutment of the second sub-arm 322 against the base 410 can limit the second sub-arm 322 from continuing to move in a direction close to the column 431, and the engagement of the extending portion 432 with the second latching portion 330 on the first sub-arm 321 can limit the second sub-arm 322 from moving in a direction away from the base 410, thereby realizing the positioning and fixing of the dipole arm 320 in two opposite directions, and further realizing the accurate assembly of the dipole arm 320 and the base 410.

[0067] Further, in an embodiment of the present application, referring to Figure 1 , the base station antenna further includes an insulating fixing bracket 500. The insulating fixing bracket 500 is provided on the side of the base 410 facing the second buckle 430, and the antenna unit 300 is detachably connected to the insulating fixing bracket 500.

[0068] In this embodiment, in order to facilitate the assembly of the antenna unit 300 and improve the firmness of fixation, an insulating fixing frame 500 is provided. The insulating fixing frame 500 is arranged at intervals on one side of the base 410 and is located on the side of the base 410 facing the second buckle 430. The antenna unit 300 is detachably connected to the insulating fixing frame 500. Preferably, the antenna balun 310 in the antenna unit 300 is detachably connected to the insulating fixing frame 500, that is, the antenna balun 310 is assembled on the insulating fixing frame 500. It can be understood that one end of the antenna balun 310 is detachably connected to the insulating fixing frame 500, and the other end of the antenna balun 310 extends into the installation space and is coupled to the feeder structure.

[0069] Further, in an embodiment of the present application, referring to Figures 9 - 11 , the insulating fixing frame 500 includes a chassis 510 and a clamping structure 520 connected to the chassis 510. A through hole is provided on the chassis 510, and the clamping structure 520 is connected to the inner wall of the through hole. The clamping structure 520 clamps on opposite sides of the antenna unit 300.

[0070] In this embodiment, the insulating fixing frame 500 includes a chassis 510 and a clamping structure 520. Among them, the chassis 510 is the main structure and has a certain load-bearing capacity. A through hole is provided on the chassis 510, and the antenna balun 310 in the antenna unit 300 passes through the through hole and extends in the direction close to the bottom plate 110 of the reflector 100. The clamping structure 520 is arranged on the inner wall of the through hole and is used to clamp and fix the antenna balun 310 in the antenna unit 300, realizing the fixed connection between the antenna balun 310 and the chassis 510. It can be understood 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 the direction close to the reflector 100 and is coupled to the feeder structure. Specifically, the chassis 510 can be square or circular, which is not limited here. The clamping structure 520 can be a fixture that can clamp the antenna balun 310.

[0071] In one embodiment, a plurality of clamping structures 520 can be provided, and the plurality of clamping structures 520 are arranged at intervals along the circumferential direction of the through hole. Specifically, one clamping structure 520 can be provided corresponding to each antenna balun 310, or a plurality of clamping structures 520 can be provided. Preferably, two clamping structures 520 are provided corresponding to one antenna balun 310, and the two clamping structures 520 are arranged on two opposite inner walls of the through hole to clamp two different positions of the antenna balun 310, improving the reliability of clamping and fixing.

[0072] In another embodiment, there are two antenna baluns 310, and at least one clamping structure 520 is correspondingly arranged for each antenna balun 310. Preferably, two clamping structures 520 are correspondingly arranged for each antenna balun 310. Specifically, the clamping structures 520 correspondingly arranged for different antenna baluns 310 are arranged at intervals in the first direction. Wherein, the first direction is the vertical direction. The clamping structures 520 correspondingly arranged for different antenna baluns 310 have a height difference in the vertical direction, so that the two antenna baluns 310 are arranged to avoid each other.

[0073] In one embodiment, there are four clamping structures 520 and two antenna baluns 310, and two clamping structures 520 are arranged for each antenna balun 310. Wherein, the four clamping structures 520 are arranged in an array along the circumferential direction of the through hole, and two adjacent clamping structures 520 are arranged in a staggered manner, and the two relatively arranged clamping structures 520 are used to clamp and fix the same antenna balun 310. It can be understood that the two relatively arranged clamping structures 520 are on the same plane, forming two different planes in total, and the two different planes are parallel to each other but do not coincide.

[0074] Further, in one embodiment of the present application, referring to Figure 9 and Figure 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 arranged at intervals 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.

[0075] In this embodiment, the clamping structure 520 includes a first clamping portion 521 and a second clamping portion 522. The second clamping portion 522 and the first clamping portion 521 are arranged at intervals in the first direction to form a clamping space 523. Wherein, the second clamping portion 522 is provided with a deformation space 524 communicating with the clamping space 523, so that the antenna balun 310 moves from the deformation space 524 into the clamping space 523.

[0076] Specifically, referring to Figure 18, the antenna balun 310 includes a coupling portion 311, a cross arm 312, and a longitudinal arm 313. Among them, longitudinal arms 313 are respectively provided at both ends of the cross arm 312. The longitudinal arms 313 are bent and connected to the cross arm 312. A coupling portion 311 is provided on one of the two longitudinal arms 313. The coupling portion 311 is provided at the 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 the end of the deformation space 524 close to the clamping space 523 is smaller than the inner diameter of the end of the deformation space 524 away from the clamping space 523, or a supporting protrusion is provided on the inner wall of the deformation space 524. The supporting protrusion is provided at the end of the deformation space 524 close to the clamping space 523. In this way, the cross arm 312 of the antenna balun 310 can move from the deformation space 524 to the clamping space 523, and is clamped on the opposite sides of the cross arm 312 of the antenna balun 310 through the first clamping portion 521 and the second clamping portion 522, realizing the fixation of the antenna balun 310.

[0077] It can be understood that the inner diameter of the end of the deformation space 524 close to the clamping space 523 is smaller than the outer diameter of the cross arm 312 in the initial state. The bending of the two opposite side walls of the end of the deformation space 524 close to the clamping space 523 in the direction away from each other under the action of an external force enables the cross arm 312 to pass through. After the cross arm 312 passes through, it returns to its original state, and the second clamping portion 522 abuts against the side of the cross arm 312 facing the longitudinal arm 313.

[0078] Preferably, referring to Figure 9 and Figure 10 , the first clamping portion 521 includes a first clamping plate 5211 and a second clamping plate 5212. Among them, the first clamping plate 5211 is connected to the inner wall of the through hole and extends along the first direction. The second clamping plate 5212 is bent and provided at the end of the first clamping plate 5211 away from the insulating mounting bracket 400 and extends in a direction away from the first clamping plate 5211. The second clamping portion 522 includes two sets of clamping arms arranged oppositely. Each set of clamping arms includes a first supporting sub-arm 5221, a second supporting sub-arm 5222, and a supporting head 5223. Among them, the first supporting sub-arm 5221 is bent and connected to the 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. The supporting head 5223 is bent and connected to the end of the second supporting sub-arm 5222 close to the second clamping plate 5212 and is spaced from the second clamping plate 5212, forming a clamping space 523. The two supporting heads 5223 in the two sets of clamping arms extend in a direction close to each other and do not intersect. The second supporting sub-arms 5222 in the two sets of clamping arms are spaced apart, jointly forming a deformation space 524 communicating with the clamping space 523.

[0079] Furthermore, in an embodiment of the present application, referring to Figure 9 andFigure 10 On the chassis 510, a holding part 530 is provided, and on the dipole arm 320, a hook position 350 is provided. The holding part 530 and the hook position 350 cooperate to clamp a plurality of dipole arms 320.

[0080] In this embodiment, in order to facilitate clamping of a plurality of dipole arms 320, a holding part 530 is provided on the chassis 510, and at the same time, a hook position 350 is provided on the dipole arm 320. Preferably, the hook 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 dipole arm 320 is swung towards the chassis 510. The holding part 530 hooks the hook position 350 on the third sub-arm 323, so that the third sub-arm 323 has a tendency to move towards the chassis 510, thereby assembling and fixing the insulating fixing frame 500, the insulating mounting frame 400, the antenna balun 310, and the dipole arm 320 into a complete antenna unit 300. A plurality of holding parts 530 are arranged at intervals along the circumferential direction of the chassis 510, and each dipole arm 320 can respectively correspond to a plurality of holding parts 530 to improve the reliability of fixing the dipole arm 320. It can be understood that by providing the holding part 530, a plurality of dipole arms 320 can be arranged compactly towards the chassis 510 to prevent them from being scattered from each other. Specifically, the holding part 530 includes a hook arm and a hook head. The hook arm is connected to the chassis 510 and extends away from the through hole; the hook head is bent and provided at one end of the hook arm away from the chassis 510 and extends away from the hook arm. The hook head cooperates with the hook position 350.

[0081] Further, in an embodiment of the present application, with reference to Figure 6 and Figure 18 on the base 410, a third positioning part 450 is provided, and on the antenna balun 310, a fourth positioning part 360 is provided. The third positioning part 450 and the fourth positioning part 360 cooperate.

[0082] In this embodiment, to facilitate accurate positioning of the antenna balun 310 and the base 410, a third positioning part 450 is provided on the base 410, and at the same time, a fourth positioning part 360 is provided on the antenna balun 310. After the third positioning part 450 and the fourth positioning part 360 cooperate, the antenna balun 310 and the insulating fixing frame 500 are assembled. Preferably, the third positioning part 450 is provided on the side of the base 410 facing the bottom plate 110 of the reflector 100, and the fourth positioning part 360 is provided on the coupling part 311 of the antenna balun 310. Specifically, the third positioning part 450 is a protrusion, and at the same time, the fourth positioning part 360 is a groove; or the third positioning part 450 is a groove, and at the same time, the fourth positioning part 360 is a protrusion. The specific setting methods of the third positioning part 450 and the fourth positioning part 360 are not limited herein.

[0083] Further, in an embodiment of the present application, the reflector 100 is provided with an opening communicating with the reflection cavity.

[0084] In this embodiment, the reflector 100 is provided with an opening communicating with the reflection cavity, so that the reflection cavity is in an open shape, which can greatly reduce the overall weight of the reflector 100, and the antenna unit 300 can be directly mounted on the bottom plate 110 of the reflector 100 through the insulating mounting frame 400, reducing the height of the entire base station antenna. Preferably, there are two side plates 120 of the reflector 100, and the two side plates 120 are arranged oppositely and jointly enclose a reflection cavity with three-side openings with the bottom plate 110, so that the reflection cavity is in an open shape or a semi-open structure.

[0085] Further, referring to Figure 17 , in an embodiment of the present application, a chute 130 is provided on the inner wall of the reflection cavity, and the feeding structure 200 is slidably connected to the chute 130.

[0086] In this embodiment, in order to facilitate the installation of the feeding structure 200, a chute 130 is provided on the inner wall of the reflection cavity. The sliding fit between the feeding structure 200 and the chute 130 can realize the disassembly and assembly of the feeding structure 200 and the reflector 100. It can be understood that through the chute 130, the feeding structure 200 can be slid into the reflection cavity, or the feeding structure 200 can be slid out of the reflection cavity. Preferably, a chute 130 is provided on each of the opposite side walls of the reflection cavity. Specifically, referring to Figure 17 , two convex ribs 121 are provided at intervals on the side wall of the reflection cavity, and the chute 130 is formed at the interval between the two convex ribs 121.

[0087] Further, in an embodiment of the present application, referring to Figures 14 - 16 , the feeding structure 200 includes a circuit board 210 suspended in the reflection cavity and a feeding strip line 220 provided on the circuit board 210. The coupling point of the feeding strip line 220 is coupled to the antenna balun 310. An opening window 230 is provided on the circuit board 210 so that the coupling point of the feeding strip line 220 is suspended. The base station antenna further includes a support frame 240, and the support frame 240 is detachably provided in the opening window 230 to support the ground side of the feeding strip line 220.

[0088] In this embodiment, the circuit board 210 is slidably connected to the chute 130, and the feeding strip line 220 is electrically connected to the circuit board 210. By providing an opening window 230 on the circuit board 210, the feeding strip line 220 is suspended at the opening window 230, so that air is used as the medium for electromagnetic wave transmission, effectively reducing the circuit loss. In addition, through the provided skylight, the antenna unit 300 can pass through, facilitating the assembly of the antenna unit 300 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 feeding strip line 220, the feeding strip line 220 is prone to bending at the suspended position, which affects the coupling connection with the antenna balun 310. For this reason, a support frame 240 is provided at the opening window 230. The support frame 240 supports the side of the feeding strip line 220 facing away from the antenna balun 310, provides support for the feeding strip line 220, prevents the feeding strip line 220 from bending, and can ensure the stability of the spacing at the coupling connection. Preferably, the support frame 240 is detachably connected to the circuit board 210, such as by snap connection or screw connection, which is not limited herein.

[0089] Further, referring to Figure 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 cooperates with the third positioning portion 450.

[0090] In this embodiment, to improve the accuracy of the assembly of the antenna balun 310, a fifth positioning portion 250 is provided on the support frame 240. By the cooperation of the fifth positioning portion 250 and the third positioning portion 450, the correctness of the installation direction is improved. Preferably, the fifth positioning portion 250 is a positioning through hole, and the third positioning portion 450 is a positioning post. The positioning post passes through the positioning through hole, thereby realizing the positioning during the assembly of the antenna balun 310.

[0091] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the embodiments of the present application. Any equivalent structural transformation made under the inventive concept of the embodiments of the present application by using the description and drawings of the embodiments of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the embodiments of the present application.

Claims

1. A base station antenna, characterized in that, The base station antenna includes: A reflector, within which a reflection cavity is formed; A feeding structure, suspended within the reflection cavity; An antenna element, disposed within the reflection cavity; and An insulating mounting bracket, on which the antenna element is detachably disposed. The insulating mounting bracket is disposed within the reflection cavity and is detachably connected to the reflector, such that the feeding structure and the reflector are respectively coupled to the antenna element; The feeding structure includes a circuit board suspended within the reflection cavity and a feeding strip line disposed on the circuit board. The antenna element includes an independently provided antenna balun and a dipole arm. The dipole arm is coupled to the reflector. The coupling point of the feeding strip line is coupled to the antenna balun. An opening is provided on the circuit board such that the coupling point of the feeding strip line is suspended. The base station antenna further includes a support frame, which is disposed at the opening to support the ground side of the feeding strip line.

2. The base station antenna according to claim 1, characterized in that, The insulating mounting bracket includes a base and a first buckle connected to the base. The reflector is provided with a first buckling position, and the first buckle is snap-fitted with the first buckling position.

3. The base station antenna according to claim 2, characterized in that, The first buckle includes a connecting portion, an operating portion, and a clamping head. The operating portion is spaced from the periphery of the base. The connecting portion connects the operating portion and the clamping head. The clamping head is disposed at one end of the operating portion away from the connecting portion and extends away from the base. The clamping head and the base cooperate to clamp the opposite side surfaces of the reflector.

4. The base station antenna according to claim 2, characterized in that The insulating mounting bracket further includes a second buckle, which is connected to the base. The antenna element is provided with a second buckling position that cooperates with the second buckle.

5. The base station antenna according to claim 4, characterized in that, The second buckle includes a column and an extension portion disposed on the column. The extension portion cooperates with the second buckling position.

6. The base station antenna according to claim 5, characterized in that, The base is provided with a first positioning portion, and the antenna element is provided with a second positioning portion that cooperates with the first positioning portion.

7. The base station antenna according to claim 6, characterized in that, The base station antenna further includes an insulating fixing bracket, which is disposed on a side of the base facing the second buckle. The antenna element is detachably connected to the insulating fixing bracket.

8. The base station antenna according to claim 7, wherein The insulating fixing bracket includes a chassis and a clamping structure connected to the chassis. A through hole is provided on the chassis, and the clamping structure is connected to the inner wall of the through hole. The clamping structure clamps the opposite sides of the antenna element.

9. The base station antenna according to claim 8, characterized in that, The clamping structure includes a first clamping portion and a second clamping portion. The first clamping portion and the second clamping portion are spaced apart to form a clamping space. The second clamping portion is provided with a deformation space communicating with the clamping space.

10. The base station antenna according to claim 9, characterized in that, The second buckling position and the second positioning portion are disposed on the dipole arm. The first clamping portion and the second clamping portion clamp the antenna balun. Among them, at least two antenna baluns and dipole arms are respectively symmetrically provided. Two bases are provided, and the two bases are detachably connected to enclose an installation space. The antenna baluns and the dipole arms are disposed within the installation space.

11. The base station antenna according to claim 10, characterized in that, A hook portion is provided on the chassis, and a hook position is provided on the dipole arm. The hook portion cooperates with the hook position to clamp multiple dipole arms.

12. The base station antenna according to claim 10, characterized in that, The base is provided with a third positioning portion, and the antenna balun is provided with a fourth positioning portion, and the third positioning portion cooperates with the fourth positioning portion.

13. The base station antenna according to claim 12, characterized in that, The reflector is provided with an opening communicating with the reflection cavity.

14. The base station antenna according to claim 13, wherein, The inner wall of the reflection cavity is provided with a sliding groove, and the feeding structure is slidably connected to the sliding groove.

15. The base station antenna according to claim 14, characterized in that, The support frame is detachably arranged on the window opening.

16. The base station antenna according to claim 15, characterized in that, The support frame is provided with a fifth positioning portion, and the fifth positioning portion cooperates with the third positioning portion.

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