CN112736386A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN112736386A CN112736386A CN202011643490.9A CN202011643490A CN112736386A CN 112736386 A CN112736386 A CN 112736386A CN 202011643490 A CN202011643490 A CN 202011643490A CN 112736386 A CN112736386 A CN 112736386A
- Authority
- CN
- China
- Prior art keywords
- cavity
- cover plate
- capacitor
- capacitor structure
- cavity filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 61
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 238000010923 batch production Methods 0.000 abstract description 4
- 238000006880 cross-coupling reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
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
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a cavity filter, which comprises a cavity, a cover plate, at least two resonators, a medium seat, a capacitor structure and an adjustable capacitor screw rod, wherein the cover plate is arranged on the cavity; the cover plate is covered on the cavity, at least two resonant cavities are formed in the cavity, and at least two resonators are respectively and correspondingly arranged on the at least two resonant cavities; the dielectric base is fixed in a cavity between two adjacent resonant cavities, the capacitor structure is mounted on the dielectric base, a first end of the capacitor structure is close to the resonator on one side of the dielectric base to form capacitive coupling and is upwards connected with the cover plate, a second end of the capacitor structure is close to the resonator on the other side of the dielectric base to form capacitive coupling, the adjustable capacitor screw is arranged on the cover plate, and the inner end of the adjustable capacitor screw extends into the cavity and is positioned right above the capacitor structure. The invention can improve the one-time pass rate of batch production and reduce the rework and rejection rate.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a cavity filter.
Background
Aiming at the requirements of 5G communication on the volume and the weight of equipment, the filter is used as an important component of a communication system and also meets the requirements of small volume and light weight. Meanwhile, the 5G coverage frequency is wider, the carrier wave is wider, the filter frequency is required to be higher, and the bandwidth is wider than that of 4G. The requirement leads to the whole volume of wave filter to shrink like this, and the size such as syntonizer reduces greatly, also is more and more high to each part precision requirement of product for traditional capacitive coupling mode can not satisfy batch production operation requirement. And the size is smaller and smaller, so that the requirement on the size of the capacitor cross coupling is high, the requirement on the position precision and the tolerance of the installation position tool is higher, and the product one-time pass rate, the rework rate and the rejection rate are greatly increased by the conventional scheme at present.
Disclosure of Invention
The invention aims to provide a cavity filter which can improve the one-time pass rate of products and reduce the rework rate and the rejection rate.
In order to achieve the above object, the present invention provides a cavity filter, which comprises a cavity, a cover plate, at least two resonators, a dielectric base, a capacitor structure and an adjustable capacitor screw; the cover plate is covered on the cavity, at least two resonant cavities are formed in the cavity, and at least two resonators are respectively and correspondingly arranged on the at least two resonant cavities; the dielectric base is fixed in a cavity between two adjacent resonant cavities, the capacitor structure is mounted on the dielectric base, a first end of the capacitor structure is close to the resonator on one side of the dielectric base to form capacitive coupling and is upwards connected with the cover plate, a second end of the capacitor structure is close to the resonator on the other side of the dielectric base to form capacitive coupling, the adjustable capacitor screw is arranged on the cover plate, and the inner end of the adjustable capacitor screw extends into the cavity and is positioned right above the capacitor structure.
Optionally, the second end of the capacitor structure forms a surrounding structure, one side of which surrounds the corresponding resonator.
Optionally, the surrounding structure is U-shaped, V-shaped or circular arc-shaped.
Optionally, the first end of the capacitor structure is connected to the cover plate by means of nut locking, welding or clinching.
Optionally, the cover plate is provided with a communication hole corresponding to the first end of the capacitor structure, and the first end of the capacitor structure is conductively connected with the communication hole in a nut locking, welding or riveting manner.
Optionally, the capacitor structure is a metal sheet, a PCB, or a silver-plated metal wire.
Optionally, the upper end of the medium seat is fixedly connected to the inner wall of the cover plate, an opening penetrating upwards is formed in the middle of the medium seat, the inner end of the adjustable capacitor screw extends into the opening, and the capacitor structure portion is located right below the opening and close to the opening.
Optionally, the media holder is made of polytetrafluoroethylene.
Optionally, the adjustable capacitor screw is mounted on the cover plate by means of press riveting or screw connection.
Optionally, the cover plate is fixedly connected with the cavity in a screw fastening or welding manner.
Compared with the prior art, the adjustable capacitor screw has the advantages that the capacitor structure is arranged and the adjustable capacitor screw is matched and utilized, so that the adjustment of the capacitor can be realized, the one-time pass rate of batch production is improved, the rework rate and the rejection rate are reduced, the realization of adjustable indexes is more flexible, the processing precision of other matched materials can be reduced, and the problem of poor products caused by processing errors can be solved.
Drawings
Fig. 1 is a schematic cross-sectional view of a cavity filter according to the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.
Referring to fig. 1 and 2, the present invention discloses a cavity filter, which includes a cavity 1, a cover plate 2, at least two resonators 3, a dielectric base 4, a capacitor structure 5 and an adjustable capacitor screw 6; the cover plate 2 is covered on the cavity 1, at least two resonant cavities 20 are formed in the cavity 1, and the at least two resonators 3 are respectively and correspondingly arranged on the at least two resonant cavities 20; the medium base 4 is fixed in a cavity 21 between two adjacent resonant cavities 20, the capacitor structure 5 is installed on the medium base 4, a first end of the capacitor structure 5 is close to the resonator 3 on one side of the medium base 4 to form capacitive coupling and is upwards connected with the cover plate 2, a second end of the capacitor structure 5 is close to the resonator 3 on the other side of the medium base 4 to form capacitive coupling, the adjustable capacitor screw 6 is arranged on the cover plate 2, and the inner end of the adjustable capacitor screw 6 extends into the cavity 21 and is located right above the capacitor structure 5.
According to the invention, the capacitor structure 5 is arranged and the adjustable capacitor screw 6 is utilized in a matched manner, so that the capacitance can be adjusted, the one-time pass rate of batch production is improved, the rework rate and the rejection rate are reduced, the realization of adjustable indexes is more flexible, the processing precision of other matched materials can be reduced, and the problem of poor products caused by processing errors can be solved.
In some embodiments, the second end of the capacitive structure 5 forms a surrounding structure 50, one side of the surrounding structure 50 surrounding the corresponding resonator 3.
Specifically, the enclosure 50 is U-shaped, V-shaped, circular arc-shaped, or other similar open structure.
In some embodiments, the first end of the capacitor structure 5 is fastened, welded or clinched to the cover plate 2 by a nut.
Specifically, the cover plate 2 is provided with a communication hole 22 corresponding to the first end of the capacitor structure 5, and the first end of the capacitor structure 5 is conductively connected to the communication hole 22 through a nut locking, welding or press riveting.
In the present invention, the capacitive structure 5 may be a metal sheet, a PCB, a silver-plated metal wire or other conductor. The invention is not limited in this regard.
In some embodiments, the upper end of the dielectric holder 4 is fixedly connected to the inner wall of the cover plate 2, the middle of the dielectric holder 4 forms an opening 40 extending upward, the inner end of the adjustable capacitor screw 6 extends into the opening 40 and is adjusted in position in the opening 40, and the capacitor structure 5 is partially located right below the opening 40 and close to the opening 40. Through the design, not only the stable installation of the medium seat 4 is convenient to realize, but also the contact between the adjustable capacitor screw 6 and the capacitor structure 5 can be avoided.
In some embodiments, the media holder 4 is a polytetrafluoroethylene material. But is not limited thereto.
In some embodiments, the adjustable capacitance screw 6 is mounted on the cover plate 2 by means of clinching or screwing. But is not limited thereto.
In some embodiments, the cover plate 2 is fixedly connected with the cavity 1 by means of screw fastening or welding. But is not limited thereto.
The following takes the cavity filter in the specific example shown in fig. 1 and fig. 2 as an example to briefly describe the working principle:
when the adjustable capacitor screw 6 is used, the adjustable capacitor screw 6 extends into the opening 40 with different depths, and the capacitance can be adjusted due to different changes of the simulation cross coupling value. As shown in the following table:
| experimental data | Adjustable capacitance screw depth | Cross coupling value of resonant cavity capacitance |
| 1st | 0mm | -33.5 |
| 2nd | 2mm | -20.5 |
| 3rd | 3mm | -10.7 |
| 4th | 5mm | -6.6 |
The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Claims (10)
1. A cavity filter is characterized by comprising a cavity, a cover plate, at least two resonators, a medium seat, a capacitor structure and an adjustable capacitor screw rod; the cover plate is covered on the cavity, at least two resonant cavities are formed in the cavity, and at least two resonators are respectively and correspondingly arranged on the at least two resonant cavities; the dielectric base is fixed in a cavity between two adjacent resonant cavities, the capacitor structure is mounted on the dielectric base, a first end of the capacitor structure is close to the resonator on one side of the dielectric base to form capacitive coupling and is upwards connected with the cover plate, a second end of the capacitor structure is close to the resonator on the other side of the dielectric base to form capacitive coupling, the adjustable capacitor screw is arranged on the cover plate, and the inner end of the adjustable capacitor screw extends into the cavity and is positioned right above the capacitor structure.
2. The cavity filter of claim 1, wherein the second end of the capacitive structure forms a surrounding structure, one side of the surrounding structure surrounding the corresponding resonator.
3. The cavity filter of claim 2, wherein the surround structure is U-shaped, V-shaped, or arc-shaped.
4. The cavity filter of claim 1, wherein the first end of the capacitor structure is fastened, welded, or clinched to the cover plate by a nut.
5. The cavity filter of claim 4, wherein the cover plate is provided with a communication hole corresponding to the first end of the capacitor structure, and the first end of the capacitor structure is conductively connected to the communication hole by nut locking, welding or riveting.
6. The cavity filter of claim 1, wherein the capacitive structure is a metal sheet, a PCB, or silver plated metal wire.
7. The cavity filter of claim 1, wherein the upper end of the dielectric holder is fixedly connected to the inner wall of the cover plate, an opening penetrating upward is formed in the middle of the dielectric holder, the inner end of the adjustable capacitor screw extends into the opening, and the capacitor structure is partially located right below the opening and close to the opening.
8. The cavity filter of claim 1, wherein the dielectric holder is made of teflon.
9. The cavity filter of claim 1, wherein the adjustable capacitance screw is mounted on the cover plate by means of clinching or screwing.
10. The cavity filter of claim 1, wherein the cover plate is fixedly connected to the cavity by means of screw fastening or welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643490.9A CN112736386A (en) | 2020-12-30 | 2020-12-30 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643490.9A CN112736386A (en) | 2020-12-30 | 2020-12-30 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112736386A true CN112736386A (en) | 2021-04-30 |
Family
ID=75609257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011643490.9A Pending CN112736386A (en) | 2020-12-30 | 2020-12-30 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112736386A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085913A (en) * | 1999-09-09 | 2001-03-30 | Murata Mfg Co Ltd | Dielectric resonator, dielectric filter, duplexer and communication unit |
| CN102299420A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | Annular multiple-wave-trap ultra-wideband antenna |
| CN102751554A (en) * | 2012-06-29 | 2012-10-24 | 摩比天线技术（深圳）有限公司 | Mixed-mode filter |
| CN208478530U (en) * | 2018-08-10 | 2019-02-05 | 鑫联波通信（东莞）有限公司 | A kind of miniaturization tunable capacitor cross-coupling suitable for communication products |
| CN210182543U (en) * | 2019-09-26 | 2020-03-24 | 鑫联波通信（东莞）有限公司 | Capacitor structure suitable for coupling in narrow space of 5G filter |
| CN214153145U (en) * | 2020-12-30 | 2021-09-07 | 东莞鸿爱斯通信科技有限公司 | Cavity filter |
-
2020
- 2020-12-30 CN CN202011643490.9A patent/CN112736386A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085913A (en) * | 1999-09-09 | 2001-03-30 | Murata Mfg Co Ltd | Dielectric resonator, dielectric filter, duplexer and communication unit |
| CN102299420A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | Annular multiple-wave-trap ultra-wideband antenna |
| CN102751554A (en) * | 2012-06-29 | 2012-10-24 | 摩比天线技术（深圳）有限公司 | Mixed-mode filter |
| CN208478530U (en) * | 2018-08-10 | 2019-02-05 | 鑫联波通信（东莞）有限公司 | A kind of miniaturization tunable capacitor cross-coupling suitable for communication products |
| CN210182543U (en) * | 2019-09-26 | 2020-03-24 | 鑫联波通信（东莞）有限公司 | Capacitor structure suitable for coupling in narrow space of 5G filter |
| CN214153145U (en) * | 2020-12-30 | 2021-09-07 | 东莞鸿爱斯通信科技有限公司 | Cavity filter |
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