CN210956938U

CN210956938U - Band elimination filter and combiner

Info

Publication number: CN210956938U
Application number: CN201922367130.XU
Authority: CN
Inventors: 罗贵文; 郭春波; 孟弼慧; 马浩军; 陈凯; 陈嘉元
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-07-07
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a band elimination filter and combiner, band elimination filter include metal cavity, coupling feed spare, metal level, insulating support piece and apron. The coupling feed piece comprises a main feed piece, a plurality of first connecting pieces and a plurality of first coupling feed plates. The other end of the first connecting piece is correspondingly connected with the first coupling feed board, and the other end of the first connecting piece extends into the first resonant cavity through the notch. The first coupling feed plate and the first resonance column are arranged at intervals. The main feed element, the first connecting element and the first coupling feed plate are of an integrated structure. The coupling feed element is isolated from the metal layer by the insulating support element, and the cover plate is covered on the metal cavity. Because main feed spare, first connecting piece and first coupling feeder panel are the integral structure, just need not to adopt if the tradition carries out welded connection's mode with main feed spare, first connecting piece, first coupling feeder panel three promptly to can reduce solder joint quantity, simplify the structure, low cost, the assembly is simple, and production efficiency is higher.

Description

Band elimination filter and combiner

Technical Field

The utility model relates to a wave filter technical field especially relates to a band elimination filter and combiner.

Background

In pursuit of resource sharing, the system has low cost, small device volume and light weight, and the mode that a plurality of systems and a plurality of frequency bands share one antenna feed system is widely applied. The improvement of the multi-system and multi-band branching and combining technology also becomes an important part in the development of communication technology. In the traditional combiner with the band-stop filter, a main path feeder line for connecting an input end connector and an output end connector is connected with a plurality of coupling branch lines in a welding mode, when the number of the coupling branch lines is large, the number of included welding spots or screws is large, the assembly process is complex, and the requirements of low cost and low intermodulation of products are difficult to meet.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to overcome the defects of the prior art, and provide a band-stop filter and a combiner, which can reduce the number of welding spots, simplify the structure, reduce the cost, simplify the assembly and improve the production efficiency.

The technical scheme is as follows: a band stop filter comprising: the antenna comprises a metal cavity, wherein a routing cavity and a plurality of first resonant cavities arranged along the routing cavity are arranged on one surface of the metal cavity, gaps communicated with the routing cavity are formed in the cavity walls of the first resonant cavities, and first resonant columns are arranged in the first resonant cavities; the coupling feed piece comprises a main feed piece, a plurality of first connecting pieces and a plurality of first coupling feed plates, the first coupling feed plates are arranged in a one-to-one correspondence mode with the first resonant cavities, the main feed piece is arranged in the wiring cavities, the main feed piece is connected with one ends of the first connecting pieces, the other ends of the first connecting pieces are correspondingly connected with the first coupling feed plates, the other ends of the first connecting pieces stretch into the first resonant cavities through the notches, the first coupling feed plates are arranged at intervals with the first resonant columns, and the main feed piece, the first connecting pieces and the first coupling feed plates are of an integrated structure.

The band elimination filter has the advantages that the main feed piece, the first connecting piece and the first coupling feed board are of an integrated structure, the mode that the main feed piece, the first connecting piece and the first coupling feed board are connected in a welding mode like the traditional mode is not needed, the number of welding points can be reduced, the structure is simplified, the cost is low, the assembly is simple, and the production efficiency is high.

In one embodiment, the band-stop filter further includes an insulating support and a cover plate, the coupling feed is isolated from the metal cavity by the insulating support, and the cover plate covers the metal cavity.

In one embodiment, the coupling feed piece is formed by forging and integrally molding, stamping and integrally molding or bending a metal plate piece.

In one embodiment, the main feeding member and the first connecting member are both sheet-shaped.

In one embodiment, the plate thicknesses of the main feeding piece, the first connecting piece and the first coupling feeding plate are the same.

In one embodiment, the main feeding piece and the first connecting piece are parallel to the bottom wall of the routing cavity, the first coupling feeding board is perpendicular to the first connecting piece, and a coupling gap is formed between the first coupling feeding board and the side wall of the first resonance column.

In one embodiment, the number of the insulating support members is two or more, and the two or more insulating support members are arranged at intervals along the main feed member.

In one embodiment, a mounting hole is formed in the main feed element, the insulating support element penetrates through the mounting hole to be fixedly connected with the main feed element, and two ends of the insulating support element are respectively abutted to the bottom wall of the wiring cavity and the cover plate.

In one embodiment, the insulating support member includes a first support column and a second support column, a bottom end surface of the first support column abuts against the bottom wall of the wiring cavity, a top end surface of the first support column is provided with an insertion column, a bottom end surface of the second support column is provided with an insertion hole corresponding to the insertion column, a top end surface of the second support column abuts against the cover plate, the insertion column penetrates through the mounting hole and is inserted into the insertion hole, and the main feed member is clamped and fixed between the top end surface of the first support column and the bottom end surface of the second support column.

In one embodiment, a plurality of the first resonant cavities are alternately arranged on two sides of the trace cavity along the trace cavity, and a plurality of the first connectors are alternately arranged on two sides of the main feed along the main feed.

A combiner comprises the band elimination filter, wherein a plurality of second resonant cavities are further arranged on one surface of the metal cavity, second resonant columns are arranged in the second resonant cavities, the second resonant cavities and the second resonant columns form a band-pass filter, and the second resonant columns in the second resonant cavities close to the signal output end of the main feed element are mutually coupled with the signal output end of the main feed element.

The combiner comprises the band elimination filter, so that the technical effect is brought by the band elimination filter, and the beneficial effects comprise the beneficial effects of the band elimination filter. In addition, the band-pass filter formed by the plurality of second resonant cavities and the plurality of second resonant columns can realize the coupling transmission of narrow-band signals to the main feed element, so that the main feed element can realize the outward transmission of broadband signals of the band-stop filter on one hand and can realize the outward transmission of narrow-band signals of the band-pass filter on the other hand, namely, the function of signal transmission by combining of the combiner is realized.

In one embodiment, the coupling feed element further comprises a second connecting element and a second coupling feed plate, one end of the second connecting element is connected with the main feed element, and the other end of the second connecting element is connected with the second coupling feed plate; an opening is formed in the cavity wall of the second resonant cavity close to the signal output end of the main feed piece, the second connecting piece penetrates through the opening and extends into the second resonant cavity, and the second coupling feed plate and the second resonant column are arranged at intervals.

In one embodiment, the main feeding element, the first connecting element, the first coupling feeding board, the second connecting element, and the second coupling feeding board are integrated.

Drawings

Fig. 1 is a schematic structural diagram of a combiner according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a coupling feed element of a combiner according to an embodiment of the present invention;

fig. 3 is an exploded view of an insulating support member of a combiner according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coupling feed element of a combiner according to an embodiment of the present invention, which is matched with an insulating support element.

Reference numerals:

10. a metal cavity; 11. a wiring cavity; 12. a first resonant cavity; 121. a notch; 13. a first resonant column; 14. a second resonant cavity; 141. a coupling window; 15. a second resonant column; 20. coupling a feed; 21. a main feed; 211. mounting holes; 22. a first connecting member; 23. a first coupling feed plate; 24. a second connecting member; 25. a second coupling feed plate; 30. a metal layer; 40. an insulating support; 41. a first support column; 411. inserting a column; 42. a second support column; 421. a jack; 50. a cover plate; 60. a first input end connector; 70. an output end connector; 80. a second input terminal.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

In one embodiment, referring to fig. 1 and 2, a band-stop filter includes a metal cavity 10, a coupling feed 20, a metal layer 30, an insulating support 40, and a cover plate 50. A trace cavity 11 and a plurality of first resonant cavities 12 arranged along the trace cavity 11 are disposed on one surface of the metal cavity 10. A gap 121 communicated with the routing cavity 11 is formed in the cavity wall of the first resonant cavity 12, and a first resonant column 13 is arranged in the first resonant cavity 12. The coupling feed 20 comprises a main feed 21, a plurality of first connecting members 22 and a plurality of first coupling feed plates 23. The first coupling feed plates 23 are arranged in one-to-one correspondence with the first resonant cavities 12. The main feed element 21 is disposed in the routing cavity 11, and the main feed element 21 is connected to one end of the first connection element 22. The other end of the first connecting element 22 is correspondingly connected to the first coupling feed plate 23, and the other end of the first connecting element 22 extends into the first resonant cavity 12 through the gap 121. The first coupling feed plate 23 is arranged at a distance from the first resonant column 13. The main feeding element 21, the first connecting element 22 and the first coupling feeding plate 23 are of an integrated structure. Further, the coupling feed 20 is isolated from the metal layer 30 by the insulating support 40, and the cover plate 50 covers the metal chamber 10.

According to the band elimination filter, the main feed piece 21, the first connecting piece 22 and the first coupling feed board 23 are of an integrated structure, and the mode that the main feed piece 21, the first connecting piece 22 and the first coupling feed board 23 are connected in a welding mode in the traditional mode is not needed, so that the number of welding points can be reduced, the structure is simplified, the cost is low, the assembly is simple, and the production efficiency is high.

In one embodiment, referring to fig. 1 and 2, the coupling feed 20 is formed by forging, stamping, or bending a metal plate. Therefore, the processing and manufacturing are convenient, no welding point exists, and the production efficiency is high.

Further, referring to fig. 1 and fig. 2, the main feeding element 21 and the first connecting element 22 are both sheet-shaped. In this way, for example, by cutting and bending a plate-shaped metal member, the coupling feed member 20 can be obtained quickly and conveniently, and the production efficiency is high. Further, the plate thicknesses of the main feeder 21, the first connection member 22, and the first coupling feeder 23 are the same. Of course, the plate thicknesses of the main feeding element 21, the first connecting element 22 and the first coupling feeding plate 23 may also be different, and are not described herein again.

In an embodiment, referring to fig. 1 and fig. 2, the main feeding element 21 and the first connecting element 22 are both parallel to the bottom wall of the routing cavity 11, the first coupling feeding plate 23 is perpendicular to the first connecting element 22, and a coupling gap is formed between the first coupling feeding plate 23 and a side wall of the first resonant column 13.

In one embodiment, the number of the insulating supports 40 is two or more, and the two or more insulating supports 40 are spaced along the main feed 21. Thus, the two or more insulating supporting members 40 can ensure that the coupling feeding element 20 is stably disposed in the trace cavity 11, and the coupling feeding element 20 is prevented from electrically contacting the metal layer 30.

In an embodiment, referring to fig. 1 to 4, a mounting hole 211 is disposed on the main feeding element 21, the insulating support 40 penetrates through the mounting hole 211 to be fixedly connected with the main feeding element 21, and two ends of the insulating support 40 respectively abut against the bottom wall of the routing cavity 11 and the cover plate 50.

Further, referring to fig. 3 and 4, the insulating support 40 includes a first support column 41 and a second support column 42. The bottom end face of the first support column 41 is abutted to the bottom wall of the routing cavity 11, and the top end face of the first support column 41 is provided with an insertion column 411. The bottom end surface of the second supporting column 42 is provided with an insertion hole 421 corresponding to the insertion column 411, and the top end surface of the second supporting column 42 is abutted to the cover plate 50. The insertion column 411 is inserted into the insertion hole 421 through the mounting hole 211, and the main feed 21 is clamped and fixed between the top end surface of the first support column 41 and the bottom end surface of the second support column 42. Therefore, on the one hand, the coupling feeding element 20 can be fixedly installed in the wiring cavity 11 through the insulating support element 40, and on the other hand, after the inserting column 411 of the first supporting column 41 passes through the mounting hole 211, the inserting hole 421 and the second supporting column 42 to be connected, the coupling feeding element 20 can be fixedly installed in the wiring cavity 11, so that the operation is convenient.

Further, referring to fig. 3 and 4, the plug 411 is, for example, fixed in the insertion hole 421 by clipping, or fixed in the insertion hole 421 by screwing, so as to achieve the combined fixation between the insulating support 40 and the main feed 21.

It is understood that the insulating support 40 may be a cylindrical support, a cubic support, or a prismatic support, which is not limited herein.

As an optional solution, the insulating support member 40 is disposed on the sidewall of the routing cavity 11, for example, it may be fixedly bonded to the sidewall of the routing cavity 11, or it may be fixedly screwed to the sidewall of the routing cavity 11, or it may be fixedly clamped to the sidewall of the routing cavity 11. In addition, the main feeding member 21 may be fixed to the insulating support member 40 by clipping, or fixed to the insulating support member 40 by bonding, or the like.

In one embodiment, referring to fig. 1 and fig. 2 again, a plurality of the first resonant cavities 12 are alternately disposed on two sides of the trace cavity 11 along the trace cavity 11, and a plurality of the first connectors 22 are alternately disposed on two sides of the main feeder 21 along the main feeder 21. Therefore, the mode that the plurality of first resonant cavities 12 are alternately and sequentially arranged on the two sides of the main feed part 21 can ensure the processing precision and the no-load Q value of the size of the parallel resonators, greatly shorten the length of the band elimination filter when the performance of the band elimination filter reaches the same level as that of single-side arrangement, and simultaneously avoid the defects of large processing difficulty and poor consistency caused by the bending or fold line trend of the main feed part 21.

In one embodiment, referring to fig. 1 and fig. 2, the band-stop filter further includes a first input terminal 60 and an output terminal 70 disposed on the metal cavity 10. The first input terminal 60 is electrically connected to one end of the main feeding element 21, the output terminal 70 is electrically connected to the other end of the main feeding element 21, and the first input terminal 60 is configured to transmit an external signal to the main feeding element 21.

In an embodiment, referring to fig. 1, a combiner includes the band-stop filter of any of the above embodiments, and a plurality of second resonant cavities 14 are further disposed on one surface of the metal cavity 10. A second resonant column 15 is arranged in the second resonant cavity 14. A plurality of the second resonant cavities 14 and a plurality of the second resonant pillars 15 constitute a band pass filter. The second resonator column 15 in the second resonator cavity 14 close to the signal output of the main feed 21 is coupled to the signal output of the main feed 21.

The combiner comprises the band elimination filter, so that the technical effect is brought by the band elimination filter, and the beneficial effects comprise the beneficial effects of the band elimination filter. In addition, the band-pass filter formed by the plurality of second resonant cavities 14 and the plurality of second resonant columns 15 can realize the coupling transmission of the narrow-band signal to the main feed element 21, so that the main feed element 21 can realize the outward transmission of the wide-band signal of the band-stop filter on one hand, and can realize the outward transmission of the narrow-band signal of the band-pass filter on the other hand, that is, the function of combining transmission signal of the combiner is realized.

It should be noted that, in order to form a band pass filter, there are many ways of disposing the plurality of second resonant cavities 14 on one surface of the metal cavity 10, for example, the plurality of second resonant cavities 14 are sequentially disposed on the metal cavity 10, and the cavity walls of two adjacent second resonant cavities 14 are disposed with coupling windows 141 for energy exchange; for another example, two or more second resonant cavities 14 of the plurality of second resonant cavities 14 are arranged in parallel, a cavity wall on one side of the second resonant cavities 14 arranged in parallel is provided with a coupling window 141 communicated with the previous second resonant cavity 14, and a cavity wall on the other side of the second resonant cavities 14 arranged in parallel is provided with a coupling window 141 communicated with the next second resonant cavity 14. In addition, the second resonant cavity 14 may also adopt other arrangements, which are not described in detail herein.

In one embodiment, referring to fig. 1 and 2, the coupling feeding element 20 further includes a second connecting element 24 and a second coupling feeding board 25. One end of the second connecting member 24 is connected to the main feeding member 21, and the other end of the second connecting member 24 is connected to the second coupling feeding plate 25. An opening is arranged on the wall of the second resonant cavity 14 close to the signal output end of the main feed element 21, the second connecting element 24 extends into the second resonant cavity 14 through the opening, and the second coupling feed plate 25 is arranged at a distance from the second resonant column 15.

Further, referring to fig. 1 and fig. 2, the main feeding element 21, the first connecting element 22, the first coupling feeding board 23, the second connecting element 24, and the second coupling feeding board 25 are integrated. Therefore, the processing and manufacturing are convenient, no welding point exists, and the production efficiency is high. In addition, it is not necessary to solder-connect the feeding line coupled with the coupling feeding part 20 and the second resonance column 15 as is conventional, but the second connection part 24 and the second coupling feeding plate 25 replace the conventional feeding line and are integrally provided on the main feeding part 21, so that the production efficiency can be greatly improved.

Further, referring to fig. 1 and 2, the combiner further includes a second input terminal 80 disposed on the metal cavity 10, and the second input terminal 80 is configured to transmit an external signal to a band-pass filter.

It will be appreciated that the first input terminal connector 60 to the output terminal connector 70 carries broadband signals of relatively wide bandwidth, and the second input terminal connector 80 to the output terminal connector 70 carries narrowband signals of relatively narrow bandwidth.

It can be understood that the first resonant cavity 12 and the first resonant column 13 in the first resonant cavity 12 cooperate to form a structure corresponding to a parallel resonator, that is, the band-stop filter is formed with a plurality of parallel resonators corresponding to the first resonant cavity 12.

The implementation principle of the band-stop filter is as follows: when a transmission signal is input to the coupling feed 20 from the first input terminal connector 60, signal energy of a certain frequency is directly coupled to the corresponding parallel resonator through the first coupling feed plate 23, so that a transmission zero is generated in the parallel resonator. Each of the parallel resonators generates a transmission zero, and a plurality of transmission zeros generated by the plurality of parallel resonators are combined to form a transmission stop band, and finally output by the output terminal connector 70, so that the function of the band-stop filter can be realized.

Further, the parallel resonators are arranged on two sides of the main feed element 21, so that the processing precision and the no-load Q value of the size of the parallel resonators can be guaranteed, the length of the band elimination filter can be greatly shortened when the performance of the parallel resonators reaches the same level as that of single-side arrangement, and the defects of high processing difficulty and poor consistency caused by bending or folding line trend of the main feed element 21 are avoided.

The metal layer 30 is disposed on the outer wall of the metal cavity 10, the wall of the first resonant cavity 12, the wall of the trace cavity 11, and the wall of the second resonant cavity 14 by, for example, electroplating, sputtering, spraying, or 3D printing, but is not limited thereto.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A band stop filter, comprising:

the antenna comprises a metal cavity, wherein a routing cavity and a plurality of first resonant cavities arranged along the routing cavity are arranged on one surface of the metal cavity, gaps communicated with the routing cavity are formed in the cavity walls of the first resonant cavities, and first resonant columns are arranged in the first resonant cavities;

the coupling feed piece comprises a main feed piece, a plurality of first connecting pieces and a plurality of first coupling feed plates, the first coupling feed plates are arranged in a one-to-one correspondence mode with the first resonant cavities, the main feed piece is arranged in the wiring cavities, the main feed piece is connected with one ends of the first connecting pieces, the other ends of the first connecting pieces are correspondingly connected with the first coupling feed plates, the other ends of the first connecting pieces stretch into the first resonant cavities through the notches, the first coupling feed plates are arranged at intervals with the first resonant columns, and the main feed piece, the first connecting pieces and the first coupling feed plates are of an integrated structure.

2. The band stop filter of claim 1, further comprising an insulating support and a cover plate, wherein the coupling feed is isolated from the metal cavity by the insulating support, and the cover plate covers the metal cavity.

3. The band-stop filter according to claim 2, wherein the coupling feed is formed by forging, stamping or bending a metal plate.

4. The band stop filter of claim 2, wherein the primary feed and the first connector are both plate-shaped.

5. The band stop filter of claim 4, wherein the plate thicknesses of the main feed, the first connection, and the first coupling feed plate are the same.

6. The band stop filter of claim 5, wherein the main feed and the first connection are both parallel to the bottom wall of the trace cavity, the first coupling feed plate is perpendicular to the first connection, and a coupling gap is formed between the first coupling feed plate and a side wall of the first resonant column.

7. The band stop filter of claim 2, wherein the number of the insulating support members is two or more, and the two or more insulating support members are spaced apart along the primary feed.

8. The band-stop filter of claim 2, wherein a mounting hole is formed in the main feed element, the insulating support element penetrates through the mounting hole to be fixedly connected with the main feed element, and two ends of the insulating support element are respectively abutted against the bottom wall of the routing cavity and the cover plate.

9. The band stop filter of claim 8, wherein the insulating support comprises a first support column and a second support column, a bottom surface of the first support column abuts against a bottom wall of the routing cavity, a top surface of the first support column is provided with an insertion column, a bottom surface of the second support column is provided with an insertion hole corresponding to the insertion column, a top surface of the second support column abuts against the cover plate, the insertion column penetrates through the mounting hole and is inserted into the insertion hole, and the main feed element is clamped and fixed between the top surface of the first support column and the bottom surface of the second support column.

10. The band reject filter according to any of claims 1 to 9, wherein a number of the first resonant cavities are alternately arranged on both sides of the trace cavity along the trace cavity, and a number of the first connectors are alternately arranged on both sides of the main feed along the main feed.

11. A combiner, comprising the band stop filter of any one of claims 1 to 10, wherein a plurality of second resonant cavities are further disposed on one surface of the metal cavity, a second resonant pillar is disposed in the second resonant cavity, the plurality of second resonant cavities and the plurality of second resonant pillars form a band pass filter, and the second resonant pillars in the second resonant cavities close to the signal output end of the main feed element are mutually coupled to the signal output end of the main feed element.

12. The combiner of claim 11, wherein the coupled feed further comprises a second connector and a second coupled feed plate, one end of the second connector is connected to the main feed, and the other end of the second connector is connected to the second coupled feed plate; an opening is formed in the cavity wall of the second resonant cavity close to the signal output end of the main feed piece, the second connecting piece penetrates through the opening and extends into the second resonant cavity, and the second coupling feed plate and the second resonant column are arranged at intervals.

13. The combiner of claim 12, wherein the primary feed, the first connection, the first coupling feed plate, the second connection, and the second coupling feed plate are a unitary structure.