CN102013538A - Cross coupling flying rod-free microwave filter with multiple transmission zeros - Google Patents
Cross coupling flying rod-free microwave filter with multiple transmission zeros Download PDFInfo
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- CN102013538A CN102013538A CN2010105096290A CN201010509629A CN102013538A CN 102013538 A CN102013538 A CN 102013538A CN 2010105096290 A CN2010105096290 A CN 2010105096290A CN 201010509629 A CN201010509629 A CN 201010509629A CN 102013538 A CN102013538 A CN 102013538A
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Abstract
The invention discloses a cross coupling flying rod-free microwave filter with multiple transmission zeros. The microwave filter is formed by cascading two filtering modules, wherein the two filtering modules are conventional asymmetrical filtering modules and are respectively an H phi coupling cavity and an H z coupling cavity. In the microwave filter, a cross coupling flying rod arranged on a cover plate and a corresponding supporting material in the conventional design are saved, multiple symmetrical or asymmetrical transmission zeros are generated by adopting nonadjacent resonant cavity coupling, and the microwave filter has a simple structure and is easy to process and assemble, correspondingly reduces the production cost and simultaneously improves the product reliability.
Description
Technical field
The present invention relates to a kind of filter, especially a kind of do not have a microwave filter with many transmission zeros that cross-couplings flies bar.
Background technology
Adopting all cavitys is the technical scheme commonly used of wireless base system median filter design now in conplane design all, and the characteristics of this design are that mechanical structure is simple, are convenient to processing and assembling; It adopts non-conterminous resonant cavity coupling, and cavity body filter can be that stopband produces symmetry or asymmetrical transmission zero in the both sides of passband, and the band that can reach expectation suppresses index request outward.Usually in this kind design, adopt cross-couplings window or cross-couplings to fly bar and produce the different transmission zeros that require.But this type of cross-couplings needs extra parts, flies bar as metal, backing material, and this is with the limits product debugging efficiency and reduce product reliability, also will bring higher processing charges etc. simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of microwave filter, can not use cross-couplings to fly under the situation of bar, produce symmetry or asymmetrical transmission zero.
For achieving the above object, by the following technical solutions:
A kind of do not have a microwave filter with many transmission zeros that cross-couplings flies bar, formed by two filtration module cascades, and each filtration module is conventional asymmetric filtration module, is respectively H φ coupling cavity and Hz coupling cavity.
Described H φ coupling cavity is the metal coaxial cavity.
Described Hz coupling cavity is a TE01 mould medium cavity.
Microwave filter of the present invention, cancel the cross-couplings that is installed in the conventional design on the cover plate and flown bar and corresponding backing material, adopt non-conterminous resonant cavity coupling, can produce symmetry or asymmetrical many transmission zeros, simple in structure, be easy to processing and assembling, reduced production cost accordingly, improved reliability of products simultaneously.
Description of drawings
According to embodiment and accompanying drawing the present invention is described in further detail below.
Fig. 1 is the perspective view of 8 grades of filters of microwave filter of the present invention;
Fig. 2 is the plane graph of the physical structure of the described 8 grades of filters realization of embodiment.
Among the figure:
1,2,3,4, medium cavity; 5,6,7,8, metal coaxial cavity; 9, radio frequency input adapter; 10, radio frequency out splice going splice; 11, coupling window.
Embodiment
As shown in Figure 1,8 grades of Filter Structures schematic diagrames of microwave filter of the present invention have been provided. Not a valid link., the plane graph of the physical structure of its realization as shown in Figure 2, cavity 1 and 4 is Hz field coupling, and the Hz field is coupled, the direction of "+" expression field is for from inside to outside wearing out the direction of paper, and " o " expression field is for entering the direction of paper from outside to inside; Cavity 5 and 8 is H φ coupling, sword head direction indication magnetic direction.The coupled magnetic field of cavity 1 to 4 can be synthetic by TE01 mould medium cavity, the coupled magnetic field of cavity 5 to 8 can be synthetic by the metal coaxial cavity, the medium cavity is to form by putting a dielectric material in the cavity, and the metal coaxial cavity then is to form coaxial concussion by putting a metal material in the cavity.
H φ coupling cavity is used to produce positive cross-couplings, can produce transmission zero at the high frequency stopband of passband.
The Hz coupling cavity is used to produce required positive and negative cross-couplings, can produce transmission zero at the low frequency stopband of passband.
Microwave filter of the present invention, the cross-couplings of having cancelled the cover plate in the conventional design and being installed on the cover plate flies bar and corresponding backing material, adopts non-conterminous resonant cavity coupling, can produce symmetry or asymmetrical many transmission zeros, simple in structure, be easy to processing and assembling.
Claims (3)
1. one kind is not had the microwave filter with many transmission zeros that cross-couplings flies bar, is formed by two filtration module cascades, it is characterized in that, each filtration module is conventional asymmetric filtration module, is respectively H φ coupling cavity and Hz coupling cavity.
2. no cross-couplings according to claim 1 flies the microwave filter with many transmission zeros of bar, it is characterized in that, described H φ coupling cavity is the metal coaxial cavity.
3. no cross-couplings according to claim 1 flies the microwave filter with many transmission zeros of bar, it is characterized in that, described Hz coupling cavity is a TE01 mould medium cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105096290A CN102013538A (en) | 2010-10-18 | 2010-10-18 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105096290A CN102013538A (en) | 2010-10-18 | 2010-10-18 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
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| CN102013538A true CN102013538A (en) | 2011-04-13 |
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| CN2010105096290A Pending CN102013538A (en) | 2010-10-18 | 2010-10-18 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403558A (en) * | 2011-07-13 | 2012-04-04 | 江苏贝孚德通讯科技股份有限公司 | TE011 mold circular cavity filter for a plurality of unsymmetrical zeros |
| CN102593557A (en) * | 2012-01-15 | 2012-07-18 | 江苏贝孚德通讯科技股份有限公司 | Asymmetric regular mode-mixing filter |
| CN104218281A (en) * | 2014-08-27 | 2014-12-17 | 西安空间无线电技术研究所 | TE01 mode dielectric filter |
| CN106025465A (en) * | 2016-06-07 | 2016-10-12 | 中国电子科技集团公司第三十六研究所 | Cavity filter |
| CN111377732A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter, communication equipment, and method for preparing dielectric block and filter |
| CN111384505A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, method for preparing dielectric filter and communication equipment |
| CN111384544A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN113036357A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN113036362A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication device and filter thereof |
| CN113394538A (en) * | 2021-06-10 | 2021-09-14 | 京信射频技术(广州)有限公司 | Resonant cavity structure, resonator, filter and communication device |
| CN113394537A (en) * | 2021-06-10 | 2021-09-14 | 京信射频技术(广州)有限公司 | Resonant cavity structure, resonator, filter and communication device |
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| CN1352814A (en) * | 1999-04-02 | 2002-06-05 | 康达特斯公司 | Method for microstrip cross-coupling control apparatus |
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2010
- 2010-10-18 CN CN2010105096290A patent/CN102013538A/en active Pending
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403558A (en) * | 2011-07-13 | 2012-04-04 | 江苏贝孚德通讯科技股份有限公司 | TE011 mold circular cavity filter for a plurality of unsymmetrical zeros |
| CN102593557A (en) * | 2012-01-15 | 2012-07-18 | 江苏贝孚德通讯科技股份有限公司 | Asymmetric regular mode-mixing filter |
| CN104218281A (en) * | 2014-08-27 | 2014-12-17 | 西安空间无线电技术研究所 | TE01 mode dielectric filter |
| CN106025465A (en) * | 2016-06-07 | 2016-10-12 | 中国电子科技集团公司第三十六研究所 | Cavity filter |
| CN111384544A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN111377732A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter, communication equipment, and method for preparing dielectric block and filter |
| CN111384505A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, method for preparing dielectric filter and communication equipment |
| CN113036357A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN113036362A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication device and filter thereof |
| CN113394538A (en) * | 2021-06-10 | 2021-09-14 | 京信射频技术(广州)有限公司 | Resonant cavity structure, resonator, filter and communication device |
| CN113394537A (en) * | 2021-06-10 | 2021-09-14 | 京信射频技术(广州)有限公司 | Resonant cavity structure, resonator, filter and communication device |
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Application publication date: 20110413 |