CN110061334B

CN110061334B - Filter structure of side direction regulation

Info

Publication number: CN110061334B
Application number: CN201910270349.XA
Authority: CN
Inventors: 方锋明; 彭蛟; 成钢; 许永超; 王波
Original assignee: Tongyu Communication Inc
Current assignee: Tongyu Communication Inc
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2024-06-04
Anticipated expiration: 2039-04-04
Also published as: CN110061334A

Abstract

The utility model provides a filter structure of side direction regulation, including the cavity, a pair of connector is all installed at the cavity both ends, all be connected with on every connector and take a percentage the piece, be provided with a plurality of baffles in the cavity, the baffle is kept apart the cavity inner chamber into a plurality of resonant cavities, all be equipped with the resonance pole in the resonant cavity, the both ends of resonance pole are fixed on the cavity lateral wall, be connected with low pass component on one of them piece of taking a percentage of with one end, another piece of taking a percentage is connected with the resonance pole in the cavity, at least one transfers the screw on two mutually parallel lateral walls of cavity and upper cover plate vertically has been seted up, it all wears to be equipped with the accent spiral shell subassembly that is used for adjusting the filter performance to transfer in the screw. The invention takes the side wall of the product in the width direction or the length direction of the appearance as the tuning direction of the product, changes the upper and lower tuning structure of the prior proposal into the lateral tuning structure, effectively increases the depth of the cavity, thereby increasing the adjustable range of the bandwidth and the frequency of the product and also increasing the power capacity of the product.

Description

Filter structure of side direction regulation

Technical Field

The invention relates to the field of modern communication, in particular to a laterally-adjusted filter structure.

Background

The filter is a typical frequency selection device, and can effectively inhibit useless signals, so that the useless signals can not pass through the filter, and only useful signals can smoothly pass through the filter, therefore, the quality of the whole communication system is directly influenced by the performance of the filter, and the filter is a vital device in modern microwave and millimeter wave communication systems.

The cavity filter is a very important filter, and compared with filters with other properties, the cavity filter has the advantages of firm structure, stable and reliable performance, small volume, moderate Q value, far high-end parasitic passband and good heat dissipation performance, and can be used for higher power and frequency.

With the development and application of 5G, the requirements on the filter are higher and higher, the miniaturization and light-weight trend of the filter product is developed, and the technical indexes are also more and more severe; it is increasingly difficult for existing conventional metal coaxial filters to meet these requirements, so new technologies and new solution developments are necessary for development.

The utility model provides an adjustable coupling structure that cavity filter was used, including two tip resonant cavities, be provided with a plurality of intermediate resonant cavity between two tip resonant cavities, install a resonant rod in every resonant cavity, two tip resonant cavities and a plurality of intermediate resonant cavity are along sharp evenly distributed, all leave the clearance between two adjacent intermediate resonant cavities and between intermediate resonant cavity and the tip resonant cavity, all the activity sets up an adjusting screw about every clearance in, intermediate resonant cavity fixedly connected with horizontally extending's first resonant piece, tip resonant cavity fixedly connected with horizontally extending's second resonant piece, link to each other through the coupling piece between first resonant piece and the second resonant piece or between arbitrary two first resonant pieces, two tip resonant cavities are connected through the tap piece with input, the output port, whole filter carries out input/output of signal through the coupling of resonant cavity, thereby realize the function.

Such a coupling adjustment device is only suitable for use with metal filters with coaxial resonant rods. Along with the demand of modern communication field front-end equipment for miniaturization of components such as diplexer, combiner, wave filter, etc., miniaturized diplexer, combiner, wave filter, etc. because of overall dimension restriction, the usable space of product is limited, and machining's space is too little, and coaxial wave filter under traditional thinking can not satisfy miniaturized, high demand product's requirement more and more, and this kind of scheme is little in product performance adjustment allowance, and the performance is difficult to realize, and assembly complicacy, manufacturing cost are high simultaneously, performance stability is not good.

The existing scheme has the defects that:

1) Because of the compact product external dimensions and small internal space, the assembly of the internal structural components of the filter (such as the resonant rod, the flying rod and the coupling piece) is quite difficult, and a large amount of assembly time and cost are increased.

2) The resonant rods in the parts are various, assembly errors are easy, meanwhile, the materials are various, and the material cost is increased.

3) The thickness direction of the product is limited, and the effective screwing length of a screw for fastening the resonant rod is insufficient, so that the resonant rod is loosened, and the performance of the product is influenced.

4) The coupling piece between the first resonant cavity and the third resonant cavity is fixed in a welding mode due to insufficient space, but the space is not easy to cause cold joint, and the product performance is affected.

5) The product is structurally limited in size and does not have enough space to increase the low pass.

Disclosure of Invention

The invention aims to solve the problems of various types of resonant rods and complex installation of parts caused by arrangement of resonant cavities of the existing filter, and provides a laterally-adjustable filter structure.

The invention solves the technical problems, and adopts the following technical scheme:

The utility model provides a filter structure of side direction regulation, includes the equal open-ended cavity of upper end and lower extreme, upper end opening part lid is equipped with the upper cover plate, lower extreme opening part lid is equipped with the lower cover plate, a pair of connector is all installed at cavity length direction's both ends, all be connected with the piece of taking a percentage on every connector, the cavity in be provided with the baffle of a plurality of interval perpendicular to upper cover plate, baffle and cavity wherein two lateral walls that are parallel to each other are perpendicular, the baffle keeps apart the cavity into a plurality of resonant cavities, all is equipped with the resonant rod in the resonant cavity, the both ends of resonant rod are fixed on the cavity lateral wall and the length of resonant rod is not less than the interval of two lateral walls, be connected with low pass through the subassembly on one of the piece of taking a percentage with another and be connected with the resonant rod in the cavity, set up at least one on two lateral walls that are parallel to each other of cavity and upper cover plate is perpendicular, all worn to be equipped with in the adjusting the screw hole and be used for adjusting filter performance.

The two ends of the resonant rod are fixed on the side wall of the cavity in a welding or press riveting mode.

The resonant rods are parallel to each other and are parallel to the partition plate, and the resonant rods are parallel to the upper cover plate.

The screw adjusting components are parallel to each other, the screw adjusting components are parallel to the upper cover plate, and the screw adjusting components are parallel to the resonance rod or perpendicular to the resonance rod.

The baffle be close to and set up flutedly on its vertically cavity lateral wall's one end, the bolt subassembly is located unsettled in the recess after penetrating the cavity lateral wall.

The low-pass assembly is installed in the low through hole of seting up on the cavity, the low-pass assembly includes low-pass and cover establishes at the outside pyrocondensation pipe of low-pass, the low-pass includes two discs and spliced pole, two discs are parallel to each other and connect as an organic wholely through the spliced pole, the disc is kept away from and is provided with the connection boss on the one end of spliced pole, processing has the parting line of following its axial distribution on the disc outer circumference, parting line position is cut edge and is handled in order to prevent that the parting line from appearing drapeing over one's head over one's shoulders. The low pass is formed by zinc alloy die casting.

The beneficial effects of the invention are as follows: the invention takes the side wall of the product in the width direction or the length direction of the appearance as the tuning direction of the product, changes the upper and lower tuning structure of the prior proposal into the lateral tuning structure, effectively increases the depth of the cavity, thereby increasing the adjustable range of the bandwidth and the frequency of the product and also increasing the power capacity of the product; meanwhile, the size and the types of the resonance rods are unified, and on the premise of ensuring the performance, the parts such as the flying rod, the flying rod seat and the coupling piece are reduced, so that the assembly efficiency is effectively improved; the fastening direction of the resonant rod is changed into a lateral pressure riveting or welding mode, so that loosening can be effectively prevented, and the performance is ensured; the low pass is increased, zinc alloy die casting is adopted for the low pass, and the traditional brass turning mode is not adopted, so that the cost is greatly reduced.

Drawings

Fig. 1 is an exploded view of the present invention.

FIG. 2 is a top view of the invention with the upper cover plate removed.

Fig. 3 is a bottom view of the present invention with the lower cover plate removed.

Fig. 4 is a side view of the present invention.

Fig. 5 is a schematic view of the assembled structure of the present invention.

Fig. 6 is a schematic diagram of the low-pass structure in the present invention.

Fig. 7 is an exploded view of a conventional filter structure.

Fig. 8 is a top view of the conventional filter structure of fig. 7 with the debug cover plate removed.

Fig. 9 is an assembled state diagram of the conventional filter structure of fig. 7.

The graphic indicia: 1. a screw adjusting component; 2. a low pass component; 201. a low pass; 2011. a connecting boss; 2012. a parting line; 2013. a connecting column; 2014. a disc; 3. a tap piece; 4. a connector; 5a, debugging a cover plate; 5b, small cover plate; 5c, an upper cover plate; 5d, a lower cover plate; 6. a resonant rod; 7. a cavity; 8. a coupling piece; 9. a fly-stick assembly; 10. a partition board.

Detailed Description

The specific embodiments shown in the drawings are as follows:

A laterally adjustable filter structure as shown in fig. 1 to 6, comprising a cavity 7 with an upper end and a lower end both open, an upper cover plate 5c is covered at the opening of the upper end, a lower cover plate 5d is covered at the opening of the lower end, a pair of connectors 4 are installed at both ends of the cavity 7 in the length direction, the connectors 4 are positioned in corresponding mounting holes on the cavity, the mounting holes are mutually isolated from the cavity, each connector 4 is connected with a tap 3, nine partition plates 10 with intervals vertical to the upper cover plate are arranged in the cavity, the partition plates 10 are vertical to two side walls of the width direction of the cavity (the two side walls of the partition plates along the length direction of the cavity are also arranged but relatively more complicated than the width direction process, the structure according to the embodiment can be deduced to the technical personnel in the field, the structure belongs to the protection scope of the application, but will not be repeated, the partition board 10 isolates the cavity into ten resonant cavities, resonant rods 6 are arranged in the resonant cavities, the resonant rods 6 are parallel to each other and parallel to the partition board 10, the resonant rods 6 are parallel to the upper cover board 5c, two ends of the resonant rods 6 are fixed on the side walls of the cavity by press riveting, the length of the resonant rods 6 is not smaller than the distance between the two side walls so as to meet the press riveting process, meanwhile, the resonant rods 6 can be uniformly sized and uniformly installed, (the embodiment uses the press riveting fixation as an example and adopts welding or other equivalent fixation modes not to describe in detail, for the person skilled in the art, the application belongs to the conventional technical selection), one tap 3 at the same end is connected with a low-pass component 2, the low-pass component 2 is installed in a low-pass hole formed on the cavity, the low-pass hole is mutually isolated from the cavity, the low-pass assembly 2 comprises a low-pass 201 formed by die casting zinc alloy and a heat shrinkage tube sleeved outside the low-pass, the low-pass 201 comprises two discs 2014 and a connecting column 2013, the two discs 2014 are mutually parallel and connected into a whole through the connecting column 2013, a connecting boss 2011 is arranged at one end of each disc 2014 far away from the connecting column 2013, parting lines 2012 distributed along the axial direction of each disc are processed on the outer circumference of each disc, trimming processing is carried out at the positions of the parting lines to prevent the parting lines from forming burrs, the other tap piece 3 is connected with a resonant rod 6 in the cavity, the tap piece 3 is led into the cavity inner cavity through a notch formed in the side wall of the cavity and then is connected with the resonant rod, two side walls in the width direction (two side walls in the length direction can also be arranged in the same manner, and the conventional technology selection in the field) are provided with two rows of screw adjusting holes, and the screw adjusting assembly 1 for adjusting the performance of a filter is penetrated in the screw adjusting holes.

The screw adjusting components 1 are parallel to each other, the screw adjusting components 1 are parallel to the upper cover plate 5c, the screw adjusting components 1 are parallel to the resonant rod 6 or perpendicular to the resonant rod 6 (only the situation that the screw adjusting components 1 are parallel to the resonant rod 6 is shown in the drawing of the embodiment, and the other situation is not described in detail how the screw adjusting components are arranged according to the structure of the application for those skilled in the art), a groove is formed on one end of the partition board 10 near the cavity side wall perpendicular to the partition board, wherein one row of screw adjusting components 1 penetrate through the cavity side wall and are suspended in the groove, and the other row of screw adjusting components are positioned in the resonant cavity.

The embodiments of the filters of fig. 1 to 6 in the present invention are as follows:

1, firstly, the resonance rod 6 is riveted on the cavity 7, and only one resonance rod 6 is provided, and the sizes are consistent. The assembly is simple, the automation is easy to realize, the efficiency is high, and meanwhile, the press riveting structure is firm and reliable.

2, The connector 4 is arranged at two ends of the cavity 7, the low-pass component 2 is arranged in the low through holes at two ends of the cavity 7, and the corresponding tapping sheet 3 is arranged and welded. The material types are few, the assembly is simple, the welding space of the tap 3 is enough, and the reliability is good; the low pass 201 is made of die-casting zinc alloy, and has low cost.

And 3, brushing solder paste on the cavity 7, then installing an upper cover plate 5c and a lower cover plate 5d, fastening by reflow soldering, and finally screwing the screw adjusting assembly 1 into the screw adjusting holes on the two side surfaces in the width direction. The cavity 7 is small in size, but the space is greatly increased through a side tuning mode, and no excessively small parts (a flying rod assembly and a coupling piece are omitted), so that the assembly precision is improved, and the performance requirement of a product is met.

The conventional filter structure as shown in fig. 7 to 9 comprises a cavity 7 with one end open, a debugging cover plate 5a is covered at the opening of the cavity 7, the cavity is divided into a plurality of resonant cavities by a plurality of folded linear partition boards protruding upwards vertically from the bottom of the cavity 7, a plurality of resonant rods 6 arranged on a vertical cavity bottom plate are arranged in the resonant cavities, a coupling piece 8 and a flying rod assembly 9 are also arranged in the cavities, a connector 4 and a tap piece 3 are arranged at two ends of the cavity, the two tap pieces 3 are connected with the resonant rods 6, meanwhile, the mounting holes of the connector 4 are mutually communicated with the inner cavity of the cavity 7, a small cover plate 5b for sealing the mounting holes of the connector is arranged at one end of the bottom of the cavity 7, a plurality of adjusting screw holes are formed in the debugging cover plate 5a, and a screw adjusting assembly 1 is arranged in the adjusting screw holes.

The implementation method of the filter of the traditional scheme is as follows:

1. Firstly, 2 coupling pieces 8 are arranged on positioning holes beside a cavity resonance rod boss, and then the coupling pieces 8 are welded and fixed; and then the flying rod is clamped into the flying rod seat to form a flying rod assembly 9, and then the flying rod assembly 9 is inserted into a clamping groove on the cavity. Because the cavity size is small, the space in the cavity is small, the dimensional accuracy is difficult to control, the virtual welding is easy to cause when the coupling piece 8 is welded, the flying rod seat in the rod assembly 9 is easy to jack up the debugging cover plate 5a, and the product performance is directly influenced.

2. The resonance rods 6 are assembled in turn on the bosses in the cavity and then fastened with screws. The resonant rod 6 is various, does not stay, is easy to assemble incorrectly, and is easy to lock due to the fact that the screw diameter for fastening the resonant rod is small.

3. The connector 4 is put into a corresponding hole of the cavity 7, the screw thread is screwed, then the tap sheet is sleeved into the port resonance rod 6, the tap sheet is aligned with the hole position of the connector, and the resonance rod is locked by welding and fixing. The tap 3 is pressed below the resonant rod, and then the resonant rod is locked loose, poor in contact and directly affects the performance.

4. The cavity 7 is brushed with solder paste through a fixture, then two cover plates of the size of the debugging cover plate 5a and the small cover plate 5b are assembled, reflow soldering is carried out together, and finally the screw adjusting assembly 1 is screwed. Because the space in the cavity is narrow, the assembly welding precision is difficult to ensure, the filter performance consistency cannot be met, meanwhile, the size of the product in the thickness direction is too small, the tuning space of the product is insufficient, and the power capacity cannot be met easily.

Compared with the prior art, the novel scheme has the following advantages:

1. The resonant rod is single in type and convenient to assemble.

2. The material type is few, small parts such as a flying rod, a flying rod seat, a coupling piece and the like are not needed, the assembly precision is high, the reliability is good, the production efficiency is high, and the product weight is light.

3. As shown in FIG. 6, the die-casting zinc alloy is adopted to form low-pass, so that the die-casting zinc alloy can be produced in a large scale, and the cost is greatly reduced.

4, As shown in fig. 5, the two side tuning modes are adopted, so that the cavity depth is greatly increased, the bandwidth and the frequency adjustable range of the product are improved, and the power capacity of the product is increased.

The invention mainly adopts a side tuning structure, and tuning screws are arranged on two end surfaces in the width direction, so that the mode that the conventional tuning screws of the filter product are arranged in the height direction of the product is changed as shown in fig. 5, and the mode is shown in fig. 1,2 and 3; the resonant rod adopts a cantilever press riveting structure, the low pass is in a zinc alloy die casting forming mode as shown in fig. 6, the width direction dimension is taken as the cavity depth direction as shown in fig. 1, the cavity depth is increased, the power capacity of a product is effectively increased, the depth of a debugging screw is also increased, and the bandwidth and the frequency adjustable range of the product are improved. The technical scheme and the embodiment of the invention are not limited, and the technical scheme and the embodiment which are equivalent or have the same effect as those of the technical scheme and the embodiment of the invention are all within the protection scope of the invention.

Claims

1. The utility model provides a filter structure of side direction regulation, includes the equal open-ended cavity of upper end and lower extreme, and upper end opening part lid is equipped with the upper cover plate, and lower extreme opening part lid is equipped with the lower cover plate, and a pair of connectors are all installed at cavity length direction's both ends, all are connected with the piece of taking a percentage on every connector, its characterized in that: the connector is positioned in a corresponding mounting hole on the cavity, and the mounting hole is mutually isolated from the inner cavity of the cavity; the filter is characterized in that a plurality of partition plates perpendicular to the upper cover plate are arranged in the cavity, the partition plates are perpendicular to two side walls of the cavity, which are parallel to each other, the partition plates isolate the cavity into a plurality of resonant cavities, resonant rods are arranged in the resonant cavities, two ends of each resonant rod are fixed on the side walls of the cavity, the length of each resonant rod is not smaller than the distance between the two side walls, one tap piece at the same end is connected with a low-pass component, the low-pass component is arranged in the low-pass hole formed in the cavity, the low-pass hole is isolated from the cavity, the other tap piece is connected with the resonant rods in the cavity through a notch formed in the side wall of the cavity, at least one screw adjusting hole is formed in the two side walls of the cavity, which are parallel to each other, of the cavity and the upper cover plate are perpendicular to each other, and screw adjusting components for adjusting the performance of the filter are arranged in the screw adjusting holes in a penetrating mode.

2. A laterally tuned filter arrangement according to claim 1, wherein: the two ends of the resonant rod are fixed on the side wall of the cavity in a welding or press riveting mode.

3. A laterally tuned filter arrangement according to claim 1, wherein: the resonant rods are parallel to each other and are parallel to the partition plate, and the resonant rods are parallel to the upper cover plate.

4. A laterally tuned filter arrangement according to claim 1, wherein: the screw adjusting components are parallel to each other, the screw adjusting components are parallel to the upper cover plate, and the screw adjusting components are parallel to the resonance rod or perpendicular to the resonance rod.

5. A laterally tuned filter arrangement according to claim 1, wherein: the baffle be close to and set up flutedly on its vertically cavity lateral wall's one end, the bolt subassembly is located unsettled in the recess after penetrating the cavity lateral wall.

6. A laterally tuned filter arrangement according to claim 1, wherein: the low-pass assembly is installed in the low through hole of seting up on the cavity, the low-pass assembly includes low-pass and cover establishes at the outside pyrocondensation pipe of low-pass, the low-pass includes two discs and spliced pole, two discs are parallel to each other and connect as an organic wholely through the spliced pole, the disc is kept away from and is provided with the connection boss on the one end of spliced pole, processing has the parting line of following its axial distribution on the disc outer circumference, parting line position is cut edge and is handled in order to prevent that the parting line from appearing drapeing over one's head over one's shoulders.

7. A laterally tuned filter arrangement according to claim 1, wherein: the low pass is formed by zinc alloy die casting.