CN109216839B - Novel miniaturized interdigital ceramic tube medium cavity filter - Google Patents
Novel miniaturized interdigital ceramic tube medium cavity filter Download PDFInfo
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- CN109216839B CN109216839B CN201811137909.6A CN201811137909A CN109216839B CN 109216839 B CN109216839 B CN 109216839B CN 201811137909 A CN201811137909 A CN 201811137909A CN 109216839 B CN109216839 B CN 109216839B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 42
- 238000013461 design Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
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- 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
-
- 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
- H01P1/2002—Dielectric waveguide filters
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Abstract
The invention discloses a novel miniaturized interdigital ceramic tube medium cavity filter, which belongs to the technical field of microwave components and comprises a metal tube shell cavity, metal tuning pins/columns, ceramic medium loading tubes and connectors, wherein cavity through holes are formed in two opposite side walls of the metal tube shell cavity, the metal tuning pins/columns and the ceramic medium loading tubes extend into the cavity through holes, and the metal tuning pins/columns and the ceramic medium loading tubes are distributed in a staggered manner on the two side walls; the invention miniaturizes the interdigital ceramic tube dielectric cavity filter, has no fastening fittings, loads and tunes the filter dielectric, is easy to design, process and manufacture, is suitable for the development and production of the filter in harsh environments with mechanical vibration, wide-temperature working and the like, and has important application value in modern electronic communication systems.
Description
Technical Field
The invention relates to the technical field of microwave components, in particular to a novel miniaturized interdigital ceramic tube medium cavity filter.
Background
The microwave filter is an indispensable key device in electronic countermeasure, radar, communication and other systems, and the comb-shaped cavity filter belongs to one of the microwave filters, and has the advantages of compact structure, good electromagnetic shielding, low insertion loss, high rectangular degree, good out-of-band rejection and the like. The typical structure of the current interdigital cavity filter is shown in fig. 1, and mainly comprises a metal cavity 1, a metal tuning screw 2, a metal tuning nut 3, a microwave connector 4 and the like, wherein the metal cavity realizes resonance and coupling of the filter, and the metal tuning screw realizes accurate tuning of the filter.
Such conventional comb-cavity filters of the present invention have the following drawbacks.
Firstly, in order to obtain good microwave performance, the resonant unit of the cavity filter is related to wavelength, and air medium is adopted to load, so that the cavity filter is huge, for example, a conventional interdigital cavity filter with a center frequency of 4.5GHz is formed, and the dimensions of length, width and height are 50mm, 30mm and 15mm, so that the miniaturization of modern electronic equipment and systems is not facilitated.
And the conventional interdigital cavity filter is tuned by adopting a metal screw, a metal nut is locked, and the volume occupied by the metal nut is irrelevant to the microwave performance of the product, so that the miniaturization of the cavity filter is not facilitated.
Disclosure of Invention
The invention aims to provide a novel miniaturized interdigital ceramic tube dielectric cavity filter so as to solve the problems.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a novel miniaturized interdigital ceramic pipe medium cavity filter, includes metal tube shell cavity, metal tuning pin/post, ceramic medium loading tube and connector, wherein, the relative both sides wall of metal tube shell cavity all is provided with the cavity through-hole, metal tuning pin/post with ceramic medium loading tube all stretches into the cavity through-hole, and metal tuning pin/post with ceramic medium loading tube is at both sides wall all crisscross distribution.
The invention is characterized in that a metal tube shell cavity, a metal tuning pin/column, a ceramic medium loading tube and a connector work cooperatively, and the ceramic tube medium loading and tuning are adopted to improve the Q value of a filling material and realize low-loss design; the physical size of a 1/4 wavelength resonance unit of the compression filter is realized by adopting ceramic tube medium loading, and the miniaturization design is realized; the debugging ceramic tube is adopted to enter the cavity hole to realize the debugging design of the cavity filter, generate microwave resonance and realize microwave signal filtering. The working frequency band of the miniaturized comb-shaped ceramic tube medium cavity filter is covered to be 100 MHz-20 GHz, and the frequency band can replace the traditional interdigital cavity filter.
As a preferable technical scheme: the ceramic medium loading tube is bonded with the cavity through hole.
Namely, the ceramic tube fastening assembly of the miniaturized cavity filter is realized by adopting an adhesive technology.
As a preferable technical scheme: the metal tuning pins/posts are welded with the cavity wall through holes.
I.e. preferably a soldering process is used to achieve a miniaturized cavity filter tuning pin/post assembly design.
Compared with the prior art, the invention has the advantages that: the invention miniaturizes the interdigital ceramic tube dielectric cavity filter (such as an interdigital cavity filter with a center frequency of 4.5GHz, and the length, width and height of the interdigital cavity filter are 25mm, 10mm and 4 mm), has no fastening fittings, and is easy to design, process and manufacture, suitable for the development and production of the filter in harsh environments with mechanical vibration, wide temperature working and the like, and has important application value in modern electronic communication systems.
Drawings
Fig. 1 is a schematic diagram of a comb-cavity filter according to the prior art.
Fig. 2 is an exploded view of an embodiment of the present invention.
Fig. 3 and 4 are schematic structural views of an assembled embodiment of the present invention.
Fig. 5 is a schematic illustration of the connection of the metal tuning pins/posts of fig. 3 to the metal shell cavity.
Fig. 6 is a schematic diagram of the connection of the ceramic dielectric loading tube to the metal shell cavity of fig. 4.
Fig. 7 is a schematic diagram of a filter debugging structure according to an embodiment of the present invention.
In the figure: 1. a metal cavity; 2. a metal tuning screw; 3. a metal tuning nut; 4. a microwave connector; 5. a metal shell cavity; 6. metal tuning pins/posts; 7. a ceramic dielectric loading tube; 8. a solder layer; 9. and an adhesive layer.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Examples:
referring to fig. 2, 3 and 4, a novel miniaturized interdigital ceramic tube dielectric cavity filter comprises a metal tube shell cavity 5, a metal tuning pin/column 6, a ceramic dielectric loading tube 7 and a microwave connector 4, wherein cavity through holes are formed in two opposite side walls of the metal tube shell cavity 5, the metal tuning pin/column 6 and the ceramic dielectric loading tube 7 extend into the cavity through holes, and the metal tuning pin/column 6 and the ceramic dielectric loading tube 7 are distributed in a staggered manner on the two side walls; the metal tube shell cavity 5 comprises an upper cover, a lower bottom plate and a middle cavity.
The ceramic dielectric loading tube 7 is bonded with the cavity through hole, that is, the ceramic tube fastening assembly of the miniaturized cavity filter is realized by adopting a bonding process, as shown in fig. 6, an adhesive layer 9 is arranged between the ceramic dielectric loading tube 7 and the cavity through hole of the metal tube shell cavity 5.
The metal tuning pins/columns 6 are welded with the cavity through holes, namely, a soldering process is adopted to realize the assembly design of the tuning pins/columns of the miniaturized cavity filter, as shown in fig. 5, a soldering tin layer 8 is arranged between the metal tuning pins/columns 6 and the cavity through holes of the metal tube shell cavity 5.
The debugging of the cavity filter is realized by debugging the length of the ceramic tube entering the cavity hole as shown in fig. 7.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. A novel miniaturized interdigital ceramic tube medium cavity filter is characterized in that: the metal tuning pin/column and the ceramic medium loading tube extend into the resonance unit through the cavity through holes, and the metal tuning pin/column and the ceramic medium loading tube are distributed on two side walls in a staggered mode.
2. The novel miniaturized interdigital ceramic tube dielectric cavity filter of claim 1, wherein: the ceramic medium loading tube is bonded with the cavity through hole.
3. The novel miniaturized interdigital ceramic tube dielectric cavity filter of claim 1, wherein: the metal tuning pins/posts are welded with the cavity through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137909.6A CN109216839B (en) | 2018-09-28 | 2018-09-28 | Novel miniaturized interdigital ceramic tube medium cavity filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137909.6A CN109216839B (en) | 2018-09-28 | 2018-09-28 | Novel miniaturized interdigital ceramic tube medium cavity filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109216839A CN109216839A (en) | 2019-01-15 |
| CN109216839B true CN109216839B (en) | 2024-03-22 |
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| CN201811137909.6A Active CN109216839B (en) | 2018-09-28 | 2018-09-28 | Novel miniaturized interdigital ceramic tube medium cavity filter |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459847B (en) * | 2019-08-02 | 2021-04-20 | 成都理工大学 | Electromagnetic coupling interdigital band-pass filter based on multiple through holes and design method |
| CN110676547A (en) * | 2019-10-12 | 2020-01-10 | 南京理工大学 | Ku wave band interdigital cavity filter |
| CN110875506B (en) * | 2019-12-02 | 2021-07-13 | 成都雷电微力科技股份有限公司 | Compact dielectric filling waveguide filter |
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|---|---|---|---|---|
| CN101630768A (en) * | 2009-08-11 | 2010-01-20 | 京信通信系统（中国）有限公司 | Cavity medium filter |
| CN101645525A (en) * | 2009-08-07 | 2010-02-10 | 大富（深圳）科技有限公司 | Cavity body filter |
| CN201966312U (en) * | 2010-12-06 | 2011-09-07 | 武汉凡谷电子技术股份有限公司 | TM (Transverse Magnetic) mode dielectric filter |
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| CN202231127U (en) * | 2011-09-01 | 2012-05-23 | 中国电子科技集团公司第三十八研究所 | Miniature microwave filter |
| WO2014075457A1 (en) * | 2012-11-16 | 2014-05-22 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communications device having same |
| CN104916888A (en) * | 2015-05-14 | 2015-09-16 | 中国电子科技集团公司第四十一研究所 | High-power filter |
| CN106129550A (en) * | 2016-08-18 | 2016-11-16 | 武汉凡谷陶瓷材料有限公司 | Local medium loaded medium waveguide filter |
| CN106207338A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of adjustable cavity body filter |
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| US7352264B2 (en) * | 2005-10-24 | 2008-04-01 | M/A-Com, Inc. | Electronically tunable dielectric resonator circuits |
| CN104170162B (en) * | 2013-11-18 | 2017-02-15 | 华为技术有限公司 | Resonator, filter, duplexer and multiplexer |
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2018
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| CN202231127U (en) * | 2011-09-01 | 2012-05-23 | 中国电子科技集团公司第三十八研究所 | Miniature microwave filter |
| WO2014075457A1 (en) * | 2012-11-16 | 2014-05-22 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communications device having same |
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| CN106129550A (en) * | 2016-08-18 | 2016-11-16 | 武汉凡谷陶瓷材料有限公司 | Local medium loaded medium waveguide filter |
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