WO2023130690A1

WO2023130690A1 - Multi-frequency fusion phase-shifting feed network and base station antenna

Info

Publication number: WO2023130690A1
Application number: PCT/CN2022/103260
Authority: WO
Inventors: 王胜; 范雄辉; 孙彦明; 程伟; 周江
Original assignee: 中信科移动通信技术股份有限公司
Priority date: 2022-01-04
Filing date: 2022-07-01
Publication date: 2023-07-13
Also published as: EP4325665A1; CN114447611A

Abstract

The present application relates to the technical field of antennas, and provides a multi-frequency fusion phase-shifting feed network and a base station antenna. The multi-frequency fusion phase-shifting feed network comprises a plurality of phase-shifting assemblies, each phase-shifting assembly comprises a phase-shifting circuit board and a slider assembly rotatably connected to the phase-shifting circuit board, and a phase-shifting circuit is provided on each phase-shifting circuit board; the plurality of phase-shifting circuit boards are divided into a first phase-shifting circuit board and a second phase-shifting circuit board, a combination circuit is provided on the first phase-shifting circuit board, and phase-shifting output ports of the phase-shifting circuit on the first phase-shifting circuit board and the phase-shifting circuit on the second phase-shifting circuit board are respectively connected to combined input ports of the combination circuit. By means of the multi-frequency fusion phase-shifting feed network and the base station antenna provided by the present application, multi-frequency independent phase shifting and fusion output can be realized, a combiner does not need to be independently arranged, reduction of occupancy of an antenna space is facilitated, layout is simplified, and cable solder joints are reduced; the phase-shifting feed network has good phase change stability and good consistency, and is convenient to assemble.

Description

A multi-frequency fusion phase shift feed network and base station antenna

Cross References to Related Applications

This application claims the priority of the Chinese patent application with application number 202210002185.4 filed on January 04, 2022, and the title of the invention is "a multi-frequency fusion phase-shift feeding network and base station antenna", which is fully incorporated by reference. into this article.

technical field

The present application relates to the technical field of antennas, in particular to a multi-frequency fusion phase-shift feeding network and a base station antenna.

Background technique

With the development of mobile communication technology, there are more and more mobile users, and the requirements for communication quality are getting higher and higher, and the capacity is getting larger and larger. In order to meet the growing demand for mobile networks, operators have introduced a variety of communication network standards. In order to save site and antenna resources and reduce operating costs, co-site and co-site multi-frequency synchronous antennas have become the first choice for network construction.

At the same time, in order to improve the utilization efficiency and coverage of the base station, different frequency bands of the base station antenna form different beam orientations, adjust the beam orientation for different users, accurately cover user targets, and greatly improve service quality and communication efficiency. In this case, a multi-frequency fusion feed network for independent ESCs in different frequency bands is required.

The existing solution is mainly to set a combiner under the radiation oscillator, and each frequency band is connected to the combiner after being electrically adjusted by a phase shifter for combination and then connected to the radiation oscillator. The existing feed network has the problems of large antenna space occupation, complex layout, many cable solder joints, high risk of intermodulation, and poor index consistency.

Contents of the invention

This application provides a multi-frequency fusion phase-shift feed network and base station antenna, which are used to solve the existing feed network that occupies a large space for the antenna, has a complex layout, and at the same time has many solder joints, high risk of intermodulation, and poor index consistency. The problem.

The present application provides a multi-frequency fusion phase-shifting feed network, including a plurality of phase-shifting components, each of which includes a phase-shifting circuit board and a slide assembly that is rotatably connected to the phase-shifting circuit board. A phase-shifting circuit is provided on the phase-shifting circuit board corresponding to the slider assembly, and the multiple phase-shifting circuit boards are divided into a first phase-shifting circuit board and a second phase-shifting circuit board, and the first phase-shifting circuit A combination circuit is arranged on the board, and the phase-shifting output ports of the phase-shifting circuit on the first phase-shifting circuit board and the phase-shifting circuit on the second phase-shifting circuit board are connected to the combining circuit respectively. The combined input port of the circuit.

According to the multi-frequency fusion phase-shift feeding network provided in the present application, the combination circuit is connected to the phase-shift output port on the first phase-shift circuit board through a microstrip line, and the combination circuit is connected to the phase-shift output port on the first phase-shift circuit board. The phase-shift output ports on the second phase-shift circuit board are connected through cables.

According to the multi-frequency fusion phase-shifting feed network provided by the present application, the combining circuit is distributed at both ends of the first phase-shifting circuit board, and at either end of the first phase-shifting circuit board, the combining circuit Both the combination input port and the combination output port connecting the circuit with the second phase-shifting circuit board are arranged at the end of the phase-shifting circuit board.

According to the multi-frequency fusion phase-shifting feed network provided by this application, the first phase-shifting circuit board is connected to the first support plate, and the two ends of the first support plate are respectively provided with line cards, and the line cards are provided with Has a cable slot.

According to the multi-frequency fusion phase-shift feeding network provided in the present application, a stepped portion is provided at the end of the first support plate, and the line clamp is disposed on the stepped portion.

According to the multi-frequency fusion phase-shifting feeding network provided in the present application, a plurality of the phase-shifting circuit boards are stacked up and down, and two adjacent phase-shifting circuit boards are connected by a support.

According to the multi-frequency fusion phase-shifting feed network provided by the present application, the slider assembly includes a coupling slider and a rotating shaft, and the rotating shaft passes through one end of the coupling slider and the phase-shifting circuit board in sequence, and the rotating shaft A fastener is detachably connected to one end passing through the phase-shifting circuit board, the coupling slide is rotatably connected to the rotating shaft, and the rotating shaft is integrally fixedly connected to the phase-shifting circuit board through the fastener .

According to the multi-frequency fusion phase-shifting feed network provided in the present application, the fastener is a fastening nut, and the part where the rotating shaft passes through the phase-shifting circuit board is provided with an external thread matching the fastening nut; And the side of the fastening nut facing the phase-shifting circuit board is provided with an elastic arm.

According to the multi-frequency fusion phase-shifting feed network provided in this application, a positioning structure is also provided between the fastening nut and the phase-shifting circuit board; a bump on one side of the phase circuit board, and a positioning hole provided on the first support plate to match the bump.

The present application also provides a base station antenna, which includes the above-mentioned multi-frequency fusion phase-shift feeding network, and also includes a plurality of radiation oscillators, and the plurality of radiation oscillators are connected to the combination output ports of the plurality of combination circuits in one-to-one correspondence .

This application provides a multi-frequency fusion phase-shifting feed network and base station antenna. Multiple phase-shifting components are set to achieve independent phase-shifting in different frequency bands. At the same time, the phase-shifting output ports of multiple phase-shifting components are connected to the first phase-shifting circuit. On the combination circuit of the board, different frequency bands are fused through the combination circuit to realize multi-frequency independent phase shifting and fusion output; the combination circuit is integrated on the first phase shifting circuit board, no need to set up a separate combiner, which can be easily connected , which is beneficial to reduce the occupied antenna space, simplify the layout, and reduce the solder joints of cables; the phase-shifting component includes a phase-shifting circuit board and a slide component, which is simple in structure and is conducive to reducing the installation space; the phase-shifting feed network has good phase change Stable, consistent and easy to assemble.

Description of drawings

In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

FIG. 1 is an overall exploded schematic diagram of the multi-frequency fusion phase-shifting feed network provided by the present application;

Fig. 2 is the exploded schematic view that the first phase-shifting circuit board provided by the present application is arranged;

Fig. 3 is the schematic diagram of the first phase-shifting circuit board provided by the present application;

Fig. 4 is the schematic diagram of the second phase-shifting circuit board provided by the present application;

Figure 5 is a schematic structural view of the first support plate provided by the present application;

FIG. 6 is a schematic structural diagram of a line card provided by the present application;

Figure 7 is a schematic structural view of the support provided by the present application;

Fig. 8 is a schematic structural view of the rotating shaft provided by the present application;

Fig. 9 is the first schematic diagram of the fastening nut provided by the present application;

Fig. 10 is a second schematic diagram of the fastening nut provided by the present application;

Fig. 11 is a schematic structural view of the fixing clip provided by the present application;

Reference signs:

101: the first phase-shifting circuit board; 102: the second phase-shifting circuit board; 201: the first supporting board;

202: Second support plate; 2011: Step part; 2012: Install card slot;

2013: Opening hole; 2014: Assembly hole; 2015: Positioning hole;

3: slide assembly; 301: coupling slide; 302: shaft;

303: fastening nut; 304: fixing clip; 3021: blocking platform;

3022: cut surface; 3023: external thread; 3031: threaded hole;

3032: elastic arm; 3033: bump; 3041: round hole;

3042: Elastic part; 4: Phase-shifting circuit; 5: Combining circuit;

501: combined input port; 502: combined output port; 503: welding pad;

6: Support piece; 601: Mounting hole; 602: Positioning column;

7: Line card; 701: Cable slot; 702: Installation buckle.

Detailed ways

In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application , but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

A multi-frequency fusion phase-shift feeding network and a base station antenna of the present application will be described below with reference to FIGS. 1 to 11 .

Referring to Fig. 1, the present embodiment provides a multi-frequency fusion phase-shifting feed network, which includes a plurality of phase-shifting components, each of which includes a phase-shifting circuit board and a rotating connection On the slider assembly 3 of the phase-shifting circuit board, a phase-shifting circuit 4 is provided on the phase-shifting circuit board corresponding to the slider assembly 3 . The slide assembly 3 is rotatable relative to the phase-shifting circuit board, and the phase-shifting circuit 4 can be arranged within the rotation range of the slide assembly 3 . The phase shifting assembly rotates the slide assembly 3 relative to the phase shifting circuit board so that the phase difference of each port changes, thereby realizing downtilting of the antenna beam of the base station.

A plurality of said phase-shifting circuit boards are divided into a first phase-shifting circuit board 101 and a second phase-shifting circuit board 102, said first phase-shifting circuit board 101 is provided with a combining circuit 5, said first phase-shifting circuit The phase shifting output ports of the phase shifting circuit 4 on the board 101 and the phase shifting circuit 4 on the second phase shifting circuit board 102 are respectively connected to the combining input port 501 of the combining circuit 5 .

In this embodiment, the phase-shifting circuit board provided with the combining circuit 5 is called the first phase-shifting circuit board 101 , and the phase-shifting circuit board without the combining circuit 5 is called the second phase-shifting circuit board 102 . That is to say, in this embodiment, the combining circuit 5 is integrated on the first phase-shifting circuit board 101; the phase-shifting output ports of a plurality of phase-shifting circuit boards are connected to the combining input port 501 of the combining circuit 5 at the same time, thereby through The combining circuit 5 outputs after combining. Multiple phase-shifting circuit boards can correspond to antenna signals of multiple frequency bands, thereby realizing multi-frequency combined output through the combining circuit 5 .

In the multi-frequency fusion phase-shift feeding network provided in this embodiment, multiple phase-shifting components are set to realize independent phase-shifting in different frequency bands, and at the same time, the phase-shifting output ports of multiple phase-shifting components are connected to the first phase-shifting circuit board 101 On the combiner circuit 5, the different frequency bands are fused by the combiner circuit 5 to realize multi-frequency independent phase shifting and fusion output; the combiner circuit 5 is integrated and arranged on the first phase shifting circuit board 101, without a separate combiner, It can be easily connected, which is conducive to reducing the space occupied by the antenna, simplifying the layout, and reducing solder joints of cables; the phase-shifting assembly includes a phase-shifting circuit board and a slide assembly 3, which is simple in structure and is conducive to reducing the installation space; the phase-shifting feed network has Good phase change stability, good consistency and easy assembly.

Specifically, the number of phase-shifting output ports on each phase-shifting circuit board is the same as the number of combining circuits 5, and the number of combining input ports 501 of each combining circuit 5 is identical to the number of phase-shifting circuit boards , each combiner circuit 5 is provided with a combiner output port 502 . The corresponding phase-shifting output ports on multiple phase-shifting circuit boards are connected to multiple combining input ports 501 of a combining circuit 5 in one-to-one correspondence, and output after being combined.

For example, with reference to Fig. 1 and Fig. 2, be provided with a first phase-shifting circuit board 101 and a second phase-shifting circuit board 102 in the present embodiment, a phase-shifting input port and 7 phase-shifting input ports are arranged on the first phase-shifting circuit board 101 Phase-shifting output port, there is also a phase-shifting input port and 7 phase-shifting output ports on the second phase-shifting circuit board 102; On the first phase-shifting circuit board 101, corresponding to the 7 phase-shifting output ports, there are respectively combined circuits The circuit 5 , that is, the first phase-shifting circuit board 101 is provided with seven combining circuits 5 ; each combining circuit 5 has two combining input ports 501 and one combining output port 502 . One of the two combining input ports 501 of each combining circuit 5 is connected with the phase-shifting output port on the first phase-shifting circuit board 101, and the other is connected with the corresponding phase-shifting output port on the second phase-shifting circuit board 102 . Thereby a group of corresponding phase-shifting output ports on the first phase-shifting circuit board 101 and the second phase-shifting circuit board 102 are connected with a combining circuit 5, and output after combining.

In other embodiments, the number of phase-shift output ports on each phase-shift circuit board can also be other, and the number of corresponding combining circuits 5 can also be other, which is not specifically limited. The number of phase-shifting circuit boards can also be three or more, so as to realize combined output of more different frequency bands, which is not specifically limited.

On the basis of the above-described embodiments, further, with reference to Fig. 1 , the combination circuit 5 is connected with the phase-shift output port on the first phase-shift circuit board 101 by a microstrip line, and the combination circuit 5 is set On the first phase-shifting circuit board 101 , a microstrip line can be directly arranged to connect the phase-shifting output port and the combining input port 501 on the first phase-shifting circuit board 101 , so as to reduce cable setting, solder joints, and facilitate connection. The combining circuit 5 is connected to the phase-shifting output port on the second phase-shifting circuit board 102 through a cable. Specifically, it can be connected by cable welding.

On the basis of the foregoing embodiments, further referring to FIG. 3 , the combining circuit 5 is distributed at both ends of the first phase-shifting circuit board 101, and at either end of the first phase-shifting circuit board 101, Both the combination input port 501 and the combination output port 502 of the combination circuit 5 connected to the second phase-shifting circuit board 102 are provided at the end of the phase-shifting circuit board. In this embodiment, the combining circuit 5 is distributed on the two ends of the first phase-shifting circuit board 101, which can facilitate the distribution of each connecting port of the combining circuit 5 on the end of the first phase-shifting circuit board 101, thereby facilitating the combination circuit. 5; and the phase shifting circuit is located in the middle of the first phase shifting circuit board 101, which facilitates the setting of the slide assembly 3.

Specifically, the combination input port 501 and the combination output port 502 of the combination circuit 5 connected to the second phase-shifting circuit board 102 are arranged in a row. The ports are arranged in an orderly manner, which facilitates orderly connection and facilitates cable arrangement. Further, the connection ports of the phase-shifting circuit on the second phase-shifting circuit board 102 can also be distributed at both ends; so that they are connected in order.

Further, referring to FIG. 3 , pads 503 are provided at the combination input port 501 and the combination output port 502 where the combination circuit 5 is connected to the second phase-shifting circuit board 102 . For soldering connections with cables. At either end of the first phase-shifting circuit board 101 , the pads 503 can be arranged in a row, so that they are connected in an orderly manner, which is convenient for soldering. Referring to FIG. 4 , pads 503 may also be provided at each connection port of the phase shifting circuit 4 on the second phase shifting circuit board 102 for soldering connection with cables.

On the basis of the above embodiments, further referring to FIG. 2 , the first phase-shifting circuit board 101 is connected to the first supporting board 201 . The first support plate 201 can support and fix the first phase-shifting circuit board 101 , so as to facilitate the support and installation of the first phase-shifting circuit board 101 . The two ends of the first support plate 201 are respectively provided with cable clips 7 , and the cable clips 7 are provided with cable clip slots 701 . At both ends of the first phase-shifting circuit board 101, the cables connected to the connecting ports of the combiner circuit 5 can be fixed and supported by the cable slot 701 on the line card 7, so that the cables can be arranged in an orderly manner.

Further, the first phase-shifting circuit board 101 and the first support plate 201 can be fixedly connected by rivets, etc., and the specific connection method can also be other, which is not limited. Referring to FIG. 1 , the second phase-shifting circuit board 102 is connected to the second supporting board 202 . The second support plate 202 can support and fix the second phase-shifting circuit board 102 , so as to facilitate the support and installation of the second phase-shifting circuit board 102 . Further, the two ends of the second support plate 202 can also be respectively provided with cable clips 7 for fixing the cables; the specific arrangement structure can be similar to the arrangement of the cable clips 7 on the first support plate 201 and will not be repeated here.

On the basis of the above embodiments, further referring to FIG. 5 , a stepped portion 2011 is provided at the end of the first support plate 201 , and the line card 7 is disposed on the stepped portion 2011 . Make the surface flush with the lower surface of the first phase-shifting circuit board 101 . The end of the first support plate 201 can be integrally bent to form a stepped portion 2011, so that the surface of the end portion is lower than the surface of the middle portion, so that when the line card 7 is installed on the stepped portion 2011, the upper surface of the line card 7 can be aligned with the stepped portion 2011. The surface of the first phase-shifting circuit board 101 is even, which is convenient for fixing the cable on the line card 7 .

5 and 6, the upper surface and the lower surface of the line card 7 are respectively provided with a cable card slot 701, and the first support plate 201 is provided with an opening 2013 corresponding to the cable card slot 701 on the lower surface of the line card 7 . The cable slot 701 on the lower surface of the line card 7 corresponds to pass through the opening 2013 on the first support plate 201 for fixing the cable. The lower surface of the line card 7 is provided with a mounting buckle 702 , and the first support plate 201 is provided with a mounting groove 2012 matching the mounting buckle 702 . The installation buckle 702 on the line card 7 cooperates with the installation slot 2012 on the first support plate 201 to realize the connection and fixation of the line card 7 and the first support plate 201 . FIG. 5 only shows the structural arrangement of the opening 2013 and the installation slot 2012 , and does not limit the specific location and quantity of the opening 2013 and the installation slot 2012 .

On the basis of the above embodiments, further referring to FIG. 1 , a plurality of phase-shifting circuit boards are stacked up and down, and two adjacent phase-shifting circuit boards are connected by a support member 6 . In this embodiment, the phase-shifting components adopt a stacked structure, which is convenient for cable setting and connection, and has a compact structure, which is conducive to reducing the space occupied by installation.

Further, referring to FIG. 7 , mounting holes 601 are respectively provided on the top and bottom of the support member 6 , and the phase-shifting circuit board is detachably connected to the support member 6 at the mounting holes 601 ; it can be detachably connected by screws or the like. A matching positioning structure is also provided between the support member 6 and the phase-shifting circuit board. Specifically, in this embodiment, the support member 6 can be in the shape of an I, and the upper and lower surfaces are used to connect with the adjacent phase-shifting circuit board; the support member 6 can also have other structures, which are not specifically limited. Positioning posts 602 can be provided on the top and bottom of the support member 6 respectively, and matching through holes can be provided on the phase-shifting circuit board, and the positioning can be realized through the insertion of the positioning posts 602 and the through holes, which is convenient for installation.

On the basis of the above-mentioned embodiments, further referring to FIG. 2 , the slide assembly 3 includes a coupling slide 301 and a rotating shaft 302, and the rotating shaft 302 passes through one end of the coupling slide 301 and the phase shifter in turn. A circuit board, one end of the rotating shaft 302 passing through the phase-shifting circuit board is detachably connected with a fastener, the coupling slide 301 is rotatably connected to the rotating shaft 302, and the rotating shaft 302 is connected to the phase-shifting circuit The plates are integrally fixedly connected by said fasteners. One end of the rotating shaft 302 passing through the phase-shifting circuit board is connected with the fastener to realize integral connection with the phase-shifting circuit board, that is, the rotating shaft 302 is non-rotatably connected with respect to the phase-shifting circuit board. A coupling circuit is provided on the coupling slide 301 , the coupling slide 301 is rotatable relative to the rotating shaft 302 , and the phase shift adjustment can be realized by the rotation of the coupling slide 301 .

Furthermore, the phase-shifting circuit board is provided with an assembly hole 2014 through which the rotating shaft 302 passes. The mounting hole 2014 is a non-circular hole 3041 , and the part corresponding to the rotating shaft 302 and the phase-shifting circuit board matches the non-circular hole 3041 . Referring to Fig. 8, the side wall of the rotating shaft 302 can be provided with a tangent surface 3022, so that the part of the rotating shaft 302 is a non-circular section, which is used to match the assembly hole 2014 on the phase-shifting circuit board, so that the relative phase-shifting circuit board of the rotating shaft 302 can be realized. Cannot be turned. Further, on the support plate (including the first support plate 201 or the second support plate 202 ), an assembly hole 2014 can also be provided corresponding to the rotation shaft 302, and the assembly hole 2014 is a non-circular hole 3041, which is used to match the rotation shaft 302 to realize the rotation shaft 302 Non-rotatable connection to the support plate. The mounting hole 2014 may be a D-shaped hole.

Referring to Fig. 2 and Fig. 8, one end of the rotating shaft 302 passing through the coupling slide 301 is provided with a blocking platform 3021, and the cross-sectional size of the blocking platform 3021 is larger than that of the rotating shaft 302; one end of the rotating shaft 302 is provided with a blocking platform 3021, and the other end passes through After coupling the sliding piece 301 and the phase-shifting circuit board, it is connected with the fastener. The blocking platform 3021 is used to prevent the rotating shaft 302 from sliding out from the coupling slide 301 and the phase-shifting circuit board and falling off. The blocking platform 3021 is provided with a fool-proof structure. The fool-proof structure is used to mark the correct matching position of the rotating shaft 302 and the assembly hole 2014, so that the rotating shaft 302 can pass through the assembly hole 2014 smoothly and realize the smooth connection with the phase-shifting circuit board. Specifically, the fool-proof structure can be the shape identification of the blocking platform 3021, that is, the blocking platform 3021 can be set as a non-centrosymmetric structure for marking the assembly direction; the fool-proof structure can also be in other forms, which are not specifically limited.

On the basis of the above embodiments, further referring to FIG. 8 and FIG. 9 , the fastener is a fastening nut 303 . The fastening nut 303 has a threaded hole 3031; the position where the rotating shaft 302 passes through the phase-shifting circuit board is provided with an external thread 3023 matching the fastening nut 303; the rotating shaft 302 and the fastening nut 303 can be connected by threads. And the fastening nut 303 is provided with an elastic arm 3032 on one side facing the phase-shifting circuit board. The elastic arm 3032 is an elastic structure. When the fastening nut 303 is connected to the rotating shaft 302 , the elastic arm 3032 can be in contact with the phase-shifting circuit board or the support plate to realize the fast connection of the rotating shaft 302 .

Specifically, referring to FIG. 9 and FIG. 10 , in this embodiment, a plurality of elastic arms 3032 can be arranged on the fastening nut 303 in the circumferential direction, and the specific number of elastic arms 3032 is not limited.

On the basis of the above embodiments, further, a positioning structure is provided between the fastening nut 303 and the phase-shifting circuit board; referring to Fig. 5 and Fig. 9, the positioning structure includes The nut 303 faces the protrusion 3033 on the side of the phase-shifting circuit board, and the positioning hole 2015 provided on the first support plate 201 matched with the protrusion 3033 . When the rotating shaft 302 and the fastening nut 303 are connected in place, the protrusion 3033 on the fastening nut 303 can be inserted into the positioning hole 2015 on the first support plate 201 correspondingly, and the position of the fastening nut 303 can be limited to ensure a firm connection sex.

Further, referring to FIG. 5 , multiple positioning holes 2015 are provided, and the multiple positioning holes 2015 are distributed in a circle. The fastening nut 303 has multiple positioning positions along the circumferential direction, which improves installation flexibility and applicability. Further, the connection between the fastening nut 303 and the second support plate 202 is similar to that of the first support plate 201 , and will not be repeated here.

With reference to Fig. 2, the slider assembly 3 also includes a fixed clip 304, the coupling slider 301 is provided with a fixed clip 304 on the side away from the phase-shifting circuit board, the fixed clip 304 is rotatably connected to the rotating shaft 302 at the first end, and the second end is provided with a fixed clip 304. There is a slot for the coupling sliding piece 301 to pass through; the coupling sliding piece 301 passes through the slot to realize integral rotational connection with the fixing clip 304 . The first end of the fixing clip 304 can be provided with a round hole 3041 through which the rotating shaft 302 can rotate, so as to realize the rotating connection with the rotating shaft 302 . Moreover, a supporting structure is provided between the fixing clip 304 and the coupling slide 301 . The support structure is used to exert a supporting force on the coupling slide 301 towards the phase-shifting circuit board, so that the gap between the coupling slide 301 and the phase-shifting circuit board remains stable, and improves the phase-shifting stability.

Further, referring to FIG. 11 , the support structure includes an elastic member 3042 disposed on the fixing clip 304; In between, an elastic supporting force is applied to the coupling slide 301 . The elastic member 3042 has elasticity, and can be a structure such as an elastic block, an elastic sheet, or an elastic bump, and is not specifically limited. FIG. 2 and FIG. 11 mainly show the arrangement forms of the circular hole 3041 on the fixing clip 304, the slot and the supporting structure, and do not limit other structures.

On the basis of the above embodiments, further, this embodiment provides a base station antenna, the base station antenna includes the multi-frequency fusion phase-shift feeding network described in any one of the above embodiments, and also includes a plurality of radiation oscillators, multiple Each of the radiation oscillators is connected to the combining output ports 502 of the plurality of combining circuits 5 in a one-to-one correspondence.

On the basis of the above embodiments, further, this embodiment is based on the fact that the existing phase shifters and combiners are independently placed inside the base station antenna, which occupies a large space inside the base station antenna and has a complex layout. At the same time, various frequency bands are connected to each other through cable terminals Connection, many solder joints, high risk of intermodulation, and poor index consistency. A multi-frequency fusion independent phase-shifting feed network integrating the phase-shifting circuit and the combining circuit 5 is provided. The phase-shifting feed network includes: a phase-shifting circuit, a combining circuit 5, a coupling circuit, a supporting fixed structure, and a rotating structure; the rotation of the rotating structure drives the coupling circuit to rotate around the rotating shaft 302 close to the phase-shifting circuit, realizing independent phase-shifting in different frequency bands At the same time, different frequency bands are fused through cable connection to achieve phase-shift and combined output, and achieve multi-frequency independent phase-shift and fusion output. This embodiment has good phase change stability, and has the advantages of simple structure, low cost, good consistency and easy assembly.

Specifically, the phase-shifting circuit, the combining circuit 5 and the coupling circuit include: the phase-shifting circuit board is a PCB board, and the PCB board is fixed on a sheet metal support plate; the combining circuit 5 is integrated on a phase-shifting circuit board; the coupling circuit is designed On the coupling slide 301. The supporting and fixing structure and the rotating structure include a fixing clip 304 , a first support plate 201 , a second support plate 202 , a high temperature resistant backstop rivet, a wire clamp 7 , a rotating shaft 302 ie a fixing screw and a fastening nut 303 . The sliding piece is close to the PCB board under the limiting action of the fixing clip 304 and the fixing screw, and the fixing screw passes through the fixing clip 304, the sliding piece, the PCB board and the sheet metal support plate, and has a limit feature and can be fixed with the sheet metal support plate. Cooperate with the fastening nut 303 through the screw thread, and the fixing clip 304 and the slide plate are rotatably connected with the fixing screw.

The fastening nut 303 has a standard nut feature, that is, a threaded hole 3031, and can use a torque tool to realize automatic assembly. The tightening nut 303 is equipped with a nut top dead position, that is, a bump 3033, which can achieve the top dead effect after being fixed with the above-mentioned fixing screw, and has the characteristics of the elastic arm 3032 at the same time. The tightening force ensures that the sliding piece PCB and the PCB board between the fastening nut 303 and the fixing screw are closely attached. The sheet metal support plate has a fastening nut 303 positioning hole 2015, which can ensure that the nut is clamped in the positioning hole 2015 after being fixed to prevent loosening. The sheet metal support plate has a bending feature and a fixing hole feature of the line card 7, and the bending feature is consistent with the thickness of the line card 7, which can ensure that the upper surface of the line card 7 can be flush with the lower surface of the main PCB substrate after the line card 7 is fixed.

The first PCB board and the second PCB board are provided with a plurality of uniformly distributed arc-shaped slow-wave microstrip line structures, that is, phase-shifting circuits, and the arc-shaped slow-wave microstrip line structures have the same center of circle. The combining circuit 5 is arranged on the first PCB, and the two ends of the arc-shaped slow-wave microstrip line structure are connected to it through the microstrip circuit. The first PCB board and the second PCB board are connected by several coaxial cables.

The first phase-shifting network is that the slide PCB sticks to the first PCB under the action of the fixing clip 304 and rotates around the fixing screw, and the signal passes through the slide PCB and the arc-shaped slow-wave microstrip line structure to achieve specific power distribution. and phase changes. The second phase-shifting network is that the slide PCB is closely attached to the second PCB under the action of the fixing clip 304 , and realizes independent phase-shifting in the same manner as the first phase-shifting network. The first phase-shifting network and the combining network are on the same main PCB and connected through a microstrip line; the second phase-shifting network and the combining network are connected through a cable, and an independent phase-shifting network with different frequency fusion is realized through the cable output.

Wherein, the line card 7 has a buckle feature and is fixed on the above-mentioned sheet metal support plate. After the line card 7 is fixed, it can support the solder joints of the PCB substrate, so as to ensure that there is no stress between the cable and the PCB after welding. The first phase-shifting network and the second phase-shifting network are fixedly supported by a plurality of I-shaped supports 6 .

In this embodiment, the phase-shifting and combining network is integrated on the first PCB, which greatly improves the integration of the feeder circuit. The entire feeder network makes the volume smaller, and the performance consistency is better. In the case of a small communication base station volume, the communication efficiency is improved at the same time.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

A multi-frequency fusion phase-shifting feed network, including a plurality of phase-shifting components, each of the phase-shifting components includes a phase-shifting circuit board and a slide assembly that is rotatably connected to the phase-shifting circuit board, and the phase-shifting circuit A phase-shifting circuit is provided on the board corresponding to the slider assembly, and a plurality of the phase-shifting circuit boards are divided into a first phase-shifting circuit board and a second phase-shifting circuit board, and the first phase-shifting circuit board is provided with There is a combining circuit, and the phase-shifting output ports of the phase-shifting circuit on the first phase-shifting circuit board and the phase-shifting circuit on the second phase-shifting circuit board are connected to the ports of the combining circuit respectively. combined input port.
The multi-frequency fusion phase-shifting feed network according to claim 1, wherein the combining circuit is connected to the phase-shifting output port on the first phase-shifting circuit board through a microstrip line, and the combining circuit It is connected with the phase-shift output port on the second phase-shift circuit board through a cable.
The multi-frequency fusion phase-shifting feed network according to claim 1, wherein the combining circuit is distributed at both ends of the first phase-shifting circuit board, and at either end of the first phase-shifting circuit board, the Both the combination input port and the combination output port of the combination circuit connected to the second phase-shifting circuit board are arranged at the end of the phase-shifting circuit board.
The multi-frequency fusion phase-shifting feed network according to any one of claims 1-3, wherein the first phase-shifting circuit board is connected to the first support plate, and the two ends of the first support plate are respectively provided with The cable card is provided with a cable card slot.
The multi-frequency fusion phase-shift feeding network according to claim 4, wherein a step is provided at the end of the first support plate, and the line clamp is arranged at the step.
The multi-frequency fusion phase-shifting feed network according to any one of claims 1-3, wherein a plurality of said phase-shifting circuit boards are stacked up and down, and two adjacent phase-shifting circuit boards are supported by pieces are connected.
The multi-frequency fusion phase-shifting feed network according to claim 4, wherein the slider assembly includes a coupling slider and a rotating shaft, and the rotating shaft passes through one end of the coupling slider and the phase-shifting circuit board sequentially, One end of the rotating shaft passing through the phase-shifting circuit board is detachably connected with a fastener, the coupling slide is rotatably connected to the rotating shaft, and the rotating shaft and the phase-shifting circuit board pass through the fastener One fixed connection.
The multi-frequency fusion phase-shifting feed network according to claim 7, wherein the fastener is a fastening nut, and the part where the rotating shaft passes through the phase-shifting circuit board is provided with a screw that matches the fastening nut. an external thread; and an elastic arm is provided on a side of the fastening nut facing the phase-shifting circuit board.
The multi-frequency fusion phase-shifting feed network according to claim 8, wherein a positioning structure is also provided between the fastening nut and the phase-shifting circuit board; The bump on one side of the phase-shifting circuit board, and the positioning hole provided on the first supporting board to match the bump.
A base station antenna, comprising the multi-frequency fusion phase-shifting feed network described in any one of claims 1-9 above, and further comprising a plurality of radiation oscillators, a plurality of said radiation oscillators and a plurality of said combining circuits The combined output ports are connected in one-to-one correspondence.