CN110224209B - Two-way sheet metal type filter - Google Patents
Two-way sheet metal type filter Download PDFInfo
- Publication number
- CN110224209B CN110224209B CN201910243127.9A CN201910243127A CN110224209B CN 110224209 B CN110224209 B CN 110224209B CN 201910243127 A CN201910243127 A CN 201910243127A CN 110224209 B CN110224209 B CN 110224209B
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- China
- Prior art keywords
- cavity
- resonant
- sheet metal
- rib
- filter
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- 239000002184 metal Substances 0.000 title claims abstract description 30
- 238000010009 beating Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 abstract description 13
- 238000011900 installation process Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
Abstract
The utility model provides a double-circuit sheet metal type filter, including one side open-ended cavity, the cavity is kept apart into two resonant cavities through the rib that separates that distributes along cavity length direction in the cavity, set up a plurality of intervals on the rib and be the location assembly bench of recess form, all install a panel beating resonance piece on every location assembly bench, two resonant cavities of separating the rib both sides are unsettled respectively in to panel beating resonance piece's both ends, panel beating resonance piece that is located cavity length direction both ends is connected with the tab of this end, all pack the spacer column in every location assembly bench, fix the panel beating resonance piece on separating the rib through the spacer column and keep apart the resonant cavity that separates the rib both sides simultaneously. According to the double-path filter, the left cavity and the right cavity share the integral resonant sheet, and the left and the right and the up and the down of the resonant sheet can be accurately positioned by opening the positioning assembly table on the spacing rib in the middle of the cavity, so that a specific fixture is not needed for positioning, and the installation process of the resonant sheet is simplified.
Description
Technical Field
The invention relates to the field of modern communication, in particular to a two-way sheet metal filter.
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.
The existing filters are divided into three schemes as follows:
first scheme-cavity filter scheme
The coupling structure generally adopts a rod-shaped resonant rod, the corresponding coupling adjusting device is arranged on the side surface of the resonant 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 resonant rod is realized.
However, such coupling adjustment devices are only suitable for coupling to rod-shaped resonator rods. Along with the increasingly urgent demands of front-end equipment in the modern communication field on miniaturization of components such as a duplexer, a combiner and a filter, when resonant rods adopted by the miniaturized components such as the duplexer, the combiner and the filter are not rod-shaped resonant rods, some miniaturized and high-requirement products have higher requirements on coupling strength, and the coupling strength adjustable range of the traditional coupling adjusting device is small and is not applicable any more.
And is heavy in weight.
Second scheme-ceramic dielectric scheme
The existing ceramic medium scheme has the advantages of small volume, easy assembly, good insertion loss performance of electrical performance indexes and high echo consistency (same batch). But the selection of materials is difficult; the firing process of the ceramic medium is complex, and the yield is low; poor lot-to-lot consistency, such as phase, amplitude, etc.; the far-end inhibition performance is poor, harmonic wave appears near the pass band almost, which is unfavorable for engineering application, but the weight is heavier, and the high power is easy to crack.
Third scheme-sheet metal resonant sheet scheme
The cavity is die-cast or machined, the width of the radial strip is very narrow, weight reduction is carried out, the resonator is made of sheet metal materials into a resonant sheet, the height is reduced by more than 1/2 of that of a conventional filter, the aim of miniaturization is achieved, but the electrical performance index is not lost, the debugging difficulty can be further reduced through simulation to determine the size requirement, the assembly time of the filter is shortened through a welding process, and the efficiency is improved.
Compared with the first scheme and the second scheme, the metal plate resonant sheet scheme has light weight, only 60 percent of the weight of the ceramic scheme, and has low cost accounting for about 70 percent of the weight of the ceramic scheme.
Disclosure of Invention
The invention aims to solve the problem that the existing sheet metal type filter resonant sheet is complex to install, and provides a double-path sheet metal type filter.
The invention solves the technical problems, and adopts the following technical scheme:
the utility model provides a double-circuit sheet metal type filter, includes one side open-ended cavity, installs on cavity length direction's both ends and takes a percentage piece and connector, and the cavity upper cover is equipped with first apron, and first apron seals the cavity open side with the piece of taking a percentage and the connector of wherein one end simultaneously in the cavity, and the piece of taking a percentage and the connector of the other end pass through the second apron and seal in the cavity, the cavity inner chamber keep apart into two resonant cavities through the rib that separates along cavity length direction distribution, set up a plurality of intervals on the rib and set up and be the location assembly bench of recess form, all install a panel beating resonant piece on every location assembly bench, the both ends of panel beating resonant piece are unsettled respectively to be arranged in two resonant cavities of rib both sides that separate, are located panel beating resonant piece and the tap piece of this end at cavity length direction both ends, all pack the spacer post in every location assembly bench, keep apart the resonant cavity of rib both sides with the panel beating resonant piece is fixed on the rib through the spacer post.
A plurality of adjusting screw installation holes are processed on one side surface, far away from the first cover plate, of the cavity, and projections of the adjusting screw installation holes fall on the sheet metal resonant piece.
A plurality of inner cavity return cavities protruding towards the outside of the cavity are formed on one side surface, far away from the first cover plate, of the cavity, and a plurality of supporting platforms located on the side surface of the cavity are formed after the inner cavity return cavities are protruded outwards.
The center line of the cavity body inner return cavity coincides with the center line of the separation rib.
The screw adjusting installation holes are distributed around the supporting platform, screw adjusting pieces used for adjusting the performance of the filter are installed in the screw adjusting installation holes, and the length of one exposed end of the screw adjusting pieces outside the cavity is not greater 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-1.5mm.
The isolation column is welded on the isolation ribs through a reflow welding process.
The beneficial effects of the invention are as follows: the left cavity and the right cavity of the dual-channel filter share the integral resonant sheet, the left and the right and the up and the down positions of the resonant sheet can be accurately positioned by opening the positioning assembly table on the spacing rib in the middle of the cavity, and no special fixture is needed for positioning, so that the installation process of the resonant sheet is simplified.
Drawings
FIG. 1 is an exploded view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the cavity of the present invention.
Fig. 3 is a schematic view of the bottom structure of fig. 2 in the present invention.
Fig. 4 is a schematic bottom view of the present invention in the installed state of fig. 1.
Fig. 5 is a cross-sectional view of fig. 4 along the length of the spacer in the present invention.
Fig. 6 is an exploded view of a conventional filter.
Fig. 7 is a schematic view of the assembled state of fig. 6.
The graphic indicia: 1. a cavity; 2. a tap piece; 3. a connector; 4. a first cover plate; 5. a separation column; 6. sheet metal resonance piece; 7. a second cover plate; 8. a screw adjusting piece; 9. a second resonant cavity; 10. a spacer rib; 11. positioning an assembly table; 12. the cavity is internally returned; 13. adjusting screw mounting holes; 14. a support platform; 15. a first resonant cavity.
Detailed Description
The specific embodiments shown in the drawings are as follows:
the utility model provides a double-circuit sheet metal type filter, including one side open-ended cavity 1, install on the both ends of cavity 1 length direction and take a percentage piece 2 and connector 3, cavity 1 upper cover is equipped with first apron 4, first apron 4 is sealed with the piece 2 and the connector 3 of taking a percentage of wherein one end simultaneously in cavity 1 with cavity open side, take a percentage piece 2 and the connector 3 of the other end seal in cavity 1 through second apron 7, take a percentage piece 2 and connector 3 and second apron 7 adopt traditional structure can, the specific connection installation relation is the conventional technical choice of technical key in this application, this does not belong to this application and consequently do not make detailed description, cavity 1 inner chamber is through the spacer bar 10 that distributes along cavity length direction be two resonant cavities, two resonant cavities are first resonant cavity 15 and second resonant cavity 9 respectively, set up a plurality of intervals on spacer bar 10 and be the location assembly platform 11 of recess form, all install a resonant piece 6 on every location assembly platform 11 in this double-circuit sheet metal filter (the sheet metal filter) and take a percentage piece 3 and second resonant cavity 7 adopt traditional structure can, this specific connection installation relation is the conventional technique selection of technical key in this application personnel, this is not belonged to the spacer bar 5 in the two ends of the cavity 1, can be fixed with two resonant cavity 5 to the resonant cavity 5 in the spacer bar 1, two ends are arranged in the spacer bar 5 and two resonant cavity 5 are located at two ends, the spacer bar 5 are fixed to the two resonant cavity 5, the resonant cavity is equipped with the spacer bar 1, the two resonant cavity is equipped with the two resonant cavity 5 and is equipped with the frock 1. Then the isolation column 5 is inserted (solder paste is coated on the surface of the isolation column before the isolation column is inserted), and the isolation column and the middle isolation rib are welded together through a reflow welding process, so that the shielding problem of the left cavity and the right cavity is solved.
A plurality of screw adjusting installation holes 13 are formed in a side surface, far away from the first cover plate 4, of the cavity 1, the projection of the screw adjusting installation holes 13 falls on the sheet metal resonant piece 6, a plurality of cavity inner return cavities 12 protruding towards the outside of the cavity 1 are formed in the side surface of the cavity 1, after the cavity inner return cavities 12 are protruded outwards, a plurality of supporting platforms 14 located on the side surface of the cavity are formed, the center lines of the cavity inner return cavities 12 coincide with the center lines of the ribs 10, the screw adjusting installation holes 13 are distributed around the supporting platforms 14, screw adjusting pieces 8 used for adjusting the performance of the filter are installed in the screw adjusting installation holes 13, and the length of one ends of the screw adjusting pieces 8 exposed outside the cavity is not greater than that of the side walls of the protruding cavities of the supporting platforms.
The thickness of the first cover plate 4 is 0.5mm, the screw adjusting piece 8 is arranged at the bottom of the cavity (usually arranged on the cover plate of the cavity), and the thickness of the cover plate can be reduced to 0.5mm (if the cover plate is provided with the screw adjusting hole, the thickness is at least 1.5 mm), so that the height direction of the filter can be reduced by at least 1mm. In the 5G communication era, the RRU integrated design is realized, and the critical 1mm height space can greatly improve the market competitiveness of the product.
As shown in fig. 6 and 7, the sheet metal resonator plate 6 is welded on the side wall of the cavity 1, and the sheet metal resonator plate 6 affects the frequency and Q value of the filter no matter how the reference displacement of the sheet metal resonator plate 6 is up, down, left and right relative to the cavity 1. Because of the suspended structure, the reference hole positioning is needed to be performed on the structural design, and a comparatively complex positioning welding tool is needed to be designed during welding so as to ensure the assembly precision. And the adjusting screws are arranged on the cover plate, so that the space between the guiding adjusting screws is not reasonably utilized, and space waste is caused (the cover plate is usually a planar sheet metal part). According to the invention (see figure 3), the adjusting screw is arranged at the bottom of the cavity, and the available space is drawn out of the cavity at the position between the nuts to form the cavity inner return cavity, so that the unloaded Q value of the filter can be effectively increased, and the insertion loss is reduced.
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 (5)
1. The utility model provides a double-circuit panel beating formula wave filter, includes one side open-ended cavity, installs on the both ends of cavity length direction and takes a percentage piece and connector, and the cavity upper cover is equipped with first apron, and first apron seals the piece and the connector that take a percentage of wherein one end simultaneously with cavity open side seal in the cavity, and the piece and the connector that take a percentage of the other end pass through the second apron and seal in the cavity, its characterized in that: the cavity is divided into two resonant cavities through spacing ribs distributed along the length direction of the cavity, a plurality of positioning assembly tables which are arranged at intervals and are in groove shapes are arranged on the spacing ribs, each positioning assembly table is provided with a sheet metal resonant sheet, two ends of each sheet metal resonant sheet are respectively suspended in the two resonant cavities at two sides of the spacing ribs, the sheet metal resonant sheets at two ends of the cavity in the length direction are connected with tap sheets at the ends, each positioning assembly table is filled with a separation column, and the sheet metal resonant sheets are fixed on the spacing ribs through the separation column and simultaneously isolate resonant cavities at two sides of the spacing ribs;
a plurality of adjusting screw mounting holes are processed on one side surface of the cavity far away from the first cover plate, and projections of the adjusting screw mounting holes fall on the sheet metal resonance sheet; the isolation column is welded on the isolation ribs through a reflow welding process.
2. The two-way sheet metal filter of claim 1, wherein: a plurality of inner cavity return cavities protruding towards the outside of the cavity are formed on one side surface, far away from the first cover plate, of the cavity, and a plurality of supporting platforms located on the side surface of the cavity are formed after the inner cavity return cavities are protruded outwards.
3. The two-way sheet metal filter of claim 2, wherein: the center line of the cavity body inner return cavity coincides with the center line of the separation rib.
4. The two-way sheet metal filter of claim 2, wherein: the screw adjusting installation holes are distributed around the supporting platform, screw adjusting pieces used for adjusting the performance of the filter are installed in the screw adjusting installation holes, and the length of one exposed end of the screw adjusting pieces outside the cavity is not greater than the length of the supporting platform protruding out of the side wall of the cavity.
5. The two-way sheet metal filter of claim 1, wherein: the thickness of the first cover plate is 0.5mm-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243127.9A CN110224209B (en) | 2019-03-28 | 2019-03-28 | Two-way sheet metal type filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243127.9A CN110224209B (en) | 2019-03-28 | 2019-03-28 | Two-way sheet metal type filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110224209A CN110224209A (en) | 2019-09-10 |
| CN110224209B true CN110224209B (en) | 2024-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910243127.9A Active CN110224209B (en) | 2019-03-28 | 2019-03-28 | Two-way sheet metal type filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN110224209B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115411477B (en) * | 2022-09-21 | 2023-10-31 | 苏州立讯技术有限公司 | Filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201897A (en) * | 2012-09-26 | 2013-07-10 | 华为技术有限公司 | Cavity filter |
| CN205944360U (en) * | 2016-07-06 | 2017-02-08 | 广东通宇通讯股份有限公司 | Cavity band elimination filter |
| CN109244617A (en) * | 2018-10-16 | 2019-01-18 | 广东通宇通讯股份有限公司 | A kind of metal plate resonance piece filter |
| CN209896220U (en) * | 2019-03-28 | 2020-01-03 | 广东通宇通讯股份有限公司 | Double-circuit strip gold type filter |
-
2019
- 2019-03-28 CN CN201910243127.9A patent/CN110224209B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201897A (en) * | 2012-09-26 | 2013-07-10 | 华为技术有限公司 | Cavity filter |
| CN205944360U (en) * | 2016-07-06 | 2017-02-08 | 广东通宇通讯股份有限公司 | Cavity band elimination filter |
| CN109244617A (en) * | 2018-10-16 | 2019-01-18 | 广东通宇通讯股份有限公司 | A kind of metal plate resonance piece filter |
| CN209896220U (en) * | 2019-03-28 | 2020-01-03 | 广东通宇通讯股份有限公司 | Double-circuit strip gold type filter |
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| Publication number | Publication date |
|---|---|
| CN110224209A (en) | 2019-09-10 |
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