CN209896220U

CN209896220U - Double-circuit strip gold type filter

Info

Publication number: CN209896220U
Application number: CN201920408443.2U
Authority: CN
Inventors: 方锋明; 彭蛟; 成钢; 王波
Original assignee: Tongyu Communication Inc
Current assignee: Tongyu Communication Inc
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-01-03
Anticipated expiration: 2029-03-28

Abstract

The utility model provides a double-circuit board gold formula filter, including one side open-ended cavity, the cavity is kept apart into two resonant cavities through the separating muscle that distributes along cavity length direction, set up a plurality of intervals on the separating muscle and set up and be the positioning assembly platform of recess form, all install a board gold resonance piece on every positioning assembly platform, the both ends of board gold resonance piece are unsettled respectively and are arranged in two resonant cavities of separating muscle both sides in, the board gold resonance piece that is located cavity length direction both ends is connected with the piece of taking a percentage of this end, it has the insulated column all to pack in every positioning assembly platform, fix the board gold resonance piece on separating the muscle through the insulated column and keep apart the resonant cavity that will separate the muscle both sides simultaneously. The utility model provides a cavity sharing a holistic resonance piece about double-circuit filter through opening out the positioning assembly platform on the muscle that separates in the middle of the cavity, can pinpoint the resonance piece about with from top to bottom position, need not specific frock location to simplify the installation of resonance piece.

Description

Double-circuit strip gold type filter

Technical Field

The utility model belongs to the technical field of modern communication and specifically relates to a gold formula wave filter is pulled to double-circuit.

Background

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

The cavity filter is an 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.

The existing filter is divided into three schemes as detailed below:

first scheme-cavity filter scheme

The coupling structure generally adopts a rod-shaped resonance rod, the corresponding coupling adjusting device is arranged on the side surface of the resonance rod, and the coupling adjusting device generally adopts a metal flying rod, or flying rod discs are additionally arranged at the front end and the rear end of the metal flying rod, so that the coupling with the resonance rod is realized.

However, this coupling adjustment device is only suitable for coupling with a rod-shaped resonance rod. Along with the miniaturization of components such as duplexers, combiners and filters by front-end equipment in the modern communication field, the miniaturization of the components such as duplexers, combiners and filters is more and more urgent, and when resonance rods adopted by the components such as the miniaturized duplexers, combiners and filters are not rod-shaped resonance rods any more, the requirements of some miniaturized and high-requirement products on coupling strength are higher, the coupling strength adjustable range of the traditional coupling adjusting device is small, and the traditional coupling adjusting device is not applicable any more.

And is heavy.

Second scheme-ceramic dielectric scheme

The existing ceramic dielectric scheme has the advantages of small volume, easy assembly, good electrical performance index insertion loss performance and high echo consistency (same batch). But the difficulty of selecting materials is large; the ceramic medium firing process is complex, and the yield is low; poor consistency among batches, such as phase, amplitude, etc.; the far-end rejection performance is poor, harmonic waves almost appear near a passband, engineering application is not facilitated, but the far-end rejection performance is heavy, and high power is easy to crack.

Third scheme-gold-pulling resonant chip scheme

The cavity is die-cast or machined, the width of the radial strip is narrow, weight reduction is carried out, the resonator is made of sheet metal materials, the height of the resonator is reduced by more than 1/2 of a conventional filter, the miniaturization target is achieved, but electrical performance indexes are not lost, the size requirement is determined through simulation, the debugging difficulty can be further reduced, the assembly time of the filter is reduced through a welding process, and the efficiency is improved.

Compared with the first and second schemes, the gold-pulling resonant chip scheme has light weight, only 60% of the weight of the ceramic scheme, and low cost, which accounts for about 70% of the ceramic scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-circuit gold pulling type filter for solving the problem that the resonant piece of the current gold pulling type filter is complicated to install.

The utility model discloses a solve above-mentioned technical problem not enough, the technical scheme who adopts is:

a double-way metal-pulling type filter comprises a cavity with an opening at one side, wherein a tap piece and a connector are arranged at two ends of the cavity in the length direction, a first cover plate is covered on the cavity and seals the opening side of the cavity and seals the tap piece and the connector at one end in the cavity, a tap piece and a connector at the other end in the cavity are sealed by a second cover plate, the cavity inner cavity is separated into two resonant cavities by a spacing rib distributed along the length direction of the cavity, a plurality of positioning assembly platforms which are arranged at intervals and are in a groove shape are arranged on the spacing rib, a gold-pulling resonant chip is arranged on each positioning assembly platform, two ends of the gold-pulling resonant chip are respectively suspended in two resonant cavities at two sides of the spacing rib, the gold-pulling resonant chips at two ends of the cavity in the length direction are connected with a tapping chip at the end, an isolation column is filled in each positioning assembly platform, the gold-pulling resonant chip is fixed on the spacing rib through the isolation column, and the resonant cavities on two sides of the spacing rib are isolated.

A plurality of adjusting screw mounting holes are processed on one side surface of the cavity far away from the first cover plate, and the projections of the adjusting screw mounting holes fall on the wrenching resonance plate.

A plurality of cavity inner return cavities protruding towards the outside of the cavity are arranged on one side face, far away from the first cover plate, of the cavity, and a plurality of supporting platforms located on the side face of the cavity are formed after the cavity inner return cavities protrude outwards.

The central line of the cavity returning in the cavity is superposed with the central line of the partition rib.

The adjusting screw mounting holes are distributed around the supporting platform, the adjusting screw pieces used for adjusting the performance of the filter are mounted in the adjusting screw mounting holes, and the length of one end, exposed out of the cavity, of each adjusting screw piece is not larger than the length of the supporting platform protruding out of the side wall of the cavity.

The thickness of the first cover plate is 0.5mm-1.5 mm.

The isolation column is welded on the spacer rib through a reflow soldering process.

The utility model has the advantages that: the utility model provides a cavity sharing holistic resonance piece about double-circuit filter, through leave out the location assembly platform on the muscle that separates in the middle of the cavity, can pinpoint resonance piece about and position from top to bottom, need not specific frock location, thereby simplify the installation of resonance piece, transfer the spiral shell setting in this application on one side of keeping away from first apron promptly in the cavity bottom, consequently the apron can reduce thickness, thereby reduce the whole thickness of wave filter, simultaneously can reduce cost, reduce the consumptive material, it can transfer spiral shell spare back weight utilization space to be provided with supporting platform on the cavity lateral wall in the installation, draw out available space in the cavity and be the cavity back chamber promptly, can effectively increase the unloaded Q value of wave filter, reduce the insertion loss.

Drawings

Fig. 1 is an explosion diagram of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the cavity of the present invention.

Fig. 3 is a schematic bottom structure diagram of fig. 2 in the present invention.

Fig. 4 is a bottom schematic view of the present invention in the installation state of fig. 1.

Fig. 5 is a cross-sectional view of fig. 4 along the length direction of the spacer bar in the present invention.

Fig. 6 is an exploded view of a conventional filter.

Fig. 7 is a schematic structural view of the assembled state of fig. 6.

Graphic notation: 1. a cavity; 2. tapping pieces; 3. a connector assembly; 4. a first cover plate; 5. an isolation column; 6. a gold-pulling resonance sheet; 7. a second cover plate; 8. a screw adjusting piece; 9. a second resonant cavity; 10. separating ribs; 11. positioning an assembly table; 12. returning the cavity body into the cavity; 13. adjusting a screw mounting hole; 14. a support platform; 15. a first resonant cavity.

Detailed Description

The specific embodiment shown in the figure is as follows:

a double-throw metal filter comprises a cavity 1 with an opening at one side, wherein a tap piece 2 and a connector 3 are arranged at two ends of the cavity 1 in the length direction, a first cover plate 4 is covered on the cavity 1, the opening side of the cavity is sealed by the first cover plate 4, the tap piece 2 and the connector 3 at one end are sealed in the cavity 1, the tap piece 2 and the connector 3 at the other end are sealed in the cavity 1 through a second cover plate 7, the tap piece 2, the connector 3 and the second cover plate 7 adopt the traditional structure, the specific connection and installation relation is the conventional technical choice of technicians in the field, the technical key points in the application are not described in detail, an inner cavity of the cavity 1 are separated into two resonant cavities through a partition rib 10 distributed along the length direction of the cavity, the two resonant cavities are respectively a first resonant cavity 15 and a second resonant cavity 9, and a plurality of positioning assembly tables 11 which are arranged at intervals and are in a groove shape are arranged on the partition rib 10, each positioning assembly table 11 is provided with a wrenching resonant piece 6, in the application, (a double-way wrenching filter) the resonant pieces in the two cavities of the first resonant cavity 15 and the second resonant cavity 9 are shared (are whole wrenching pieces), two ends of the wrenching resonant piece 6 are respectively suspended in the two resonant cavities at two sides of the spacing rib, the wrenching resonant pieces 6 at two ends of the cavity 1 in the length direction are connected with the tapping piece 2 at the end, each positioning assembly table 11 is filled with an isolation column 5, the wrenching resonant pieces 6 are fixed on the spacing rib 10 through the isolation columns 5, the resonant cavities at two sides of the spacing rib 10 are isolated, the positioning assembly table 11 is arranged on the spacing rib 10 in the middle of the cavity 1, the left and right positions and the upper and lower positions of the resonant pieces can be accurately positioned, and specific tool positioning is not needed. Then the isolation column 5 is inserted (the surface of the isolation column is coated with tin paste before insertion), and the isolation column and the middle isolation rib are welded together through a reflow soldering process, so that the shielding problem of the left cavity and the right cavity is solved.

Cavity 1 keep away from on the side of first apron 4 processing have a plurality of screw mounting holes 13 of transferring, transfer the projection of screw mounting hole 13 and fall on turning gold resonance piece 6, cavity 1 keep away from a side of first apron 4 and be provided with a plurality of cavities that are bellied outside cavity back 12 to cavity 1, form a plurality of supporting platforms 14 that are located on the cavity side after cavity back 12 evagination, the cavity in return the central line of cavity 12 and the coincidence of the central line of spacer bar 10, transfer screw mounting holes 13 and distribute around supporting platform 14, transfer and install in the screw mounting hole 13 and be used for adjusting the accent spiral shell spare 8 of filter performance, transfer the exposed length of one end with the cavity outside of spiral shell spare 8 and be not more than the length of supporting platform protrusion cavity lateral wall.

First apron 4 thickness be 0.5mm, transfer spiral shell spare 8 in the cavity bottom (set up on the cavity apron usually), owing to need not set up on the apron and transfer the screw, the plate thickness of apron can reduce to 0.5mm (if have above the apron and transfer the screw, thickness needs to 1.5mm at least), the utility model discloses the wave filter direction of height can reduce 1mm at least. In the 5G communication era, RRU is integrally designed, and the market competitiveness of the product can be greatly improved by the key 1mm height space.

As shown in fig. 6 and 7, in the structure diagram of the gold-plated single-pass filter, the sheet metal resonator plate 6 needs to be welded to the side wall of the cavity 1, and the sheet metal resonator plate 6 affects the frequency and Q value of the filter regardless of the up-down, left-right reference displacement relative to the cavity 1. Due to the suspension structure, the datum hole needs to be positioned in the structural design, and a relatively complex positioning welding tool needs to be designed during welding so as to guarantee the assembly precision. And the adjusting screws are arranged above the cover plate, so that the space between the adjusting screws is not reasonably utilized, and the space waste is caused (the cover plate is usually a plane wrenching piece). The utility model discloses (see fig. 3) transfer the spiral shell in the cavity bottom, the position between the nut is drawn out available space in the cavity and is formed the cavity and return the chamber, can effectively increase the no-load Q value of wave filter, reduces the insertion loss.

The technical solution and the implementation method listed in the present invention are not limiting, and the technical solution and the implementation method listed in the present invention are equivalent or have the same effect.

Claims

1. The utility model provides a two-way gold-pulling type filter, includes one side open-ended cavity, installs tap piece and connector on cavity length direction's the both ends, and the cavity upper cover is equipped with first apron, and first apron is sealed with cavity opening side simultaneously with wherein the tap piece and the connector of one end sealed in the cavity, and the tap piece and the connector of the other end pass through the second apron and seal in the cavity, its characterized in that: the cavity inner chamber keep apart into two resonant cavities through the separating muscle that distributes along cavity length direction, set up a plurality of intervals on the separating muscle and set up and be the positioning assembly platform of recess form, all install a gold resonance piece on every positioning assembly platform, the both ends of pulling gold resonance piece are unsettled respectively and are arranged in two resonant cavities of separating muscle both sides in, the gold resonance piece that pulls that is located cavity length direction both ends is connected with the piece of taking a percentage of this end, it has the insulated column all to pack in every positioning assembly platform, will pull gold resonance piece and fix the resonant cavity of separating muscle both sides on the separating muscle simultaneously through the insulated column.

2. A double-throw gold filter according to claim 1, wherein: a plurality of adjusting screw mounting holes are processed on one side surface of the cavity far away from the first cover plate, and the projections of the adjusting screw mounting holes fall on the wrenching resonance plate.

3. A double-throw gold filter according to claim 2, wherein: a plurality of cavity inner return cavities protruding towards the outside of the cavity are arranged on one side face, far away from the first cover plate, of the cavity, and a plurality of supporting platforms located on the side face of the cavity are formed after the cavity inner return cavities protrude outwards.

4. A double-throw gold filter according to claim 3, wherein: the central line of the cavity returning in the cavity is superposed with the central line of the partition rib.

5. A double-throw gold filter according to claim 3, wherein: the adjusting screw mounting holes are distributed around the supporting platform, the adjusting screw pieces used for adjusting the performance of the filter are mounted in the adjusting screw mounting holes, and the length of one end, exposed out of the cavity, of each adjusting screw piece is not larger than the length of the supporting platform protruding out of the side wall of the cavity.

6. A double-throw gold filter according to claim 1, wherein: the thickness of the first cover plate is 0.5mm-1.5 mm.

7. A double-throw gold filter according to claim 1, wherein: the isolation column is welded on the spacer rib through a reflow soldering process.