CN104319443A - E-plane superconducting diaphragm filter - Google Patents
E-plane superconducting diaphragm filter Download PDFInfo
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- CN104319443A CN104319443A CN201410566100.0A CN201410566100A CN104319443A CN 104319443 A CN104319443 A CN 104319443A CN 201410566100 A CN201410566100 A CN 201410566100A CN 104319443 A CN104319443 A CN 104319443A
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Abstract
An E-plane superconducting diaphragm filter comprises a rectangular waveguide and two or more than two superconducting diaphragms fixed on the central E plane of the rectangular waveguide. The superconducting diaphragms and the rectangular waveguide are coupled to form a resonant cavity. The rectangular waveguide is formed by opposite butt joint of two [-shaped waveguide cavities, wherein superconducting films are grown on inner walls of the waveguide cavities. The joint surface of the waveguide cavities shaped like the Chinese character fang is the central E plane of the rectangular waveguide, and the opposite edges of the waveguide cavities shaped like the Chinese character fang extend outwards to form protrusions to be used for forming bolt holes so as to fix the waveguide cavities shaped like the Chinese character fang. The middle diaphragms are preferably metal diaphragms, wherein superconducting films are grown on the outer surfaces of the metal diaphragms. A pin alignment hole with the diameter of 0.2 mm is introduced. Accurate assembly of the filter is achieved through the alignment hole. The problem that an existing waveguide filter is large in millimeter wave band insertion loss and out-of-band rejection is insufficient is solved. Besides, due to the insertion loss of the filter, filters of more levels can be designed, the out-of-band rejection of the filter is improved, and the performance of the millimeter wave filter is greatly improved finally.
Description
Technical field
The invention belongs to millimeter waveguide technical field of filtering, relate to millimeter waveguide filter, particularly a kind of E face is the millimeter waveguide filter of superconduction diaphragm.
Background technology
Millimeter wave is in an increasingly wide range of applications in the fields such as radar communication, satellite communication and navigation, and filter is as the vitals of millimeter wave receiver, also play very important role, its filtering performance is one of key factor affecting receiver performance.Existing millimeter wave filter mainly contains waveguide filter and plane circuit filter two kinds.But have the features such as frequency range high (wavelength is short) due to millimeter wave, the loss that its propagation causes on common substrate is comparatively large, and therefore planar circuit filter almost will not adopt.
At present, the more of millimeter wave band filter research is waveguide filter.Waveguide filter is mainly divided into direct-coupling cavity filter, E face iris waveguide filter and comb-like waveguide filter.Wherein, what direct-coupling cavity filter adopted is that inductance diaphragm is coupled, and its Out-of-band rejection degree is poor; E face diaphragm filter is divided into again single-iris filter and two diaphragm filter, and the advantage of this kind of filter is the Out-of-band rejection degree that improve filter to a certain extent.But, no matter be that the E face diaphragm filter that direct-coupling cavity filter or employing inductance diaphragm carry out being coupled all cannot the fine demand that must meet to high performance millimeter wave receiver in engineering in prior art.Therefore, still must improve the performance of filter, namely reduce insertion loss, increase Out-of-band rejection and and the squareness factor obtained.Along with the maturation of superconductor technology/technique, superconducting film is taken seriously all the more than the advantage such as at least low order of magnitude of sheet resistance of common metal copper in the sheet resistance of millimeter wave band.But so far, not yet find that there is and superconduction diaphragm is applied to millimeter wave filtering to improve the technology of existing filter filtering performance.
Summary of the invention
The object of the invention is cannot meet demand to high performance millimeter wave receiver in engineering in order to solve existing millimeter wave filter because of parameters such as insertion loss, Out-of-band rejection and squareness factors, proposing a kind of E face superconduction diaphragm filter.
Technical scheme of the present invention is: E face superconduction diaphragm filter, comprises rectangular waveguide, it is characterized in that, E face is fixed with two or more superconduction diaphragm in rectangular waveguide central authorities, and superconduction diaphragm is coupled with rectangular waveguide and forms resonant cavity; Adjacent superconduction diaphragm unequal interval distribution, adjacent superconduction diaphragm is along coplanar on rectangular waveguide length direction, the waveguide that rectangular waveguide is Contraband type by two cross sections relatively fixedly forms, and the joint face of Contraband type waveguide is for formed rectangular waveguide is for the central E face of fixing superconduction diaphragm.
Further, the structure of fixing for the waveguide of the Contraband type bolt hole that to be the relative edge of Contraband type waveguide stretch out in the projection and projection that are formed in the direction being parallel to joint face.
Further, superconduction diaphragm is clamped and fastened on the central E face of rectangular waveguide.
Further, two or more superconduction diaphragm is fixedly connected with by fixed head, and fixed head is used for being connected with rectangular waveguide.
Further, the joint face of fixed head and the waveguide of Contraband type is provided with mutually corresponding alignment mark.
Further, described alignment mark is be arranged at the contraposition through hole in the projection of fixed head and the waveguide of Contraband type respectively, and described contraposition through hole is simultaneously as the bolt hole making the waveguide of Contraband type fix composition rectangular waveguide.
Further, the inwall growth of described rectangular waveguide has superconducting film.
Beneficial effect of the present invention: superconduction diaphragm filter in E face of the present invention not only solves the problem that existing waveguide filter millimeter wave band Insertion Loss is large, Out-of-band rejection degree is inadequate, the Rectangular Waveguide Structure of the novelty simultaneously proposed is easy to assembling, and the alignment mark set up ensure that simulation value and actual test value obtain consistency.Compared with the wave-guide cavity wave formed with traditional metal, cavity inner wall growth of the present invention has superconducting film, E facial mask sheet is adopted superconduction diaphragm simultaneously, reduce the insertion loss of filter, and then more multistage filter can be designed, improve the Out-of-band rejection of filter, finally make the performance of millimeter wave filter greatly improve.
Accompanying drawing explanation
Fig. 1 is a kind of concrete structure of superconduction diaphragm filter in E face of the present invention;
The detonation configuration that Fig. 2 is the filter of millimeter waveguide shown in Fig. 1 illustrates.
Embodiment
Embodiments of the invention design according to principle of the present invention, is further elaborated principle of the present invention below in conjunction with accompanying drawing and specific embodiment.
As shown in Figures 1 and 2, the E face superconduction diaphragm filter of the present embodiment, comprises rectangular waveguide 1, and E face is fixed with two or more superconduction diaphragm 3 in rectangular waveguide central authorities; The distribution of adjacent superconduction diaphragm unequal interval, adjacent superconduction diaphragm is along coplanar on rectangular waveguide length direction.Coupling coefficient between the number resonant cavity of adjustment resonant cavity is to obtain different design objectives, and described design objective refers to the parameters such as the bandwidth of operation of filter, ripple coefficient, insertion loss and Out-of-band rejection.Coupling coefficient between the number resonant cavity of wherein resonant cavity can be obtained by the size changing the size of superconduction diaphragm, quantity and rectangular waveguide.Because the position of superconduction diaphragm in rectangular waveguide is extremely important, directly have influence on the performance of filter and the consistency with design parameter.For the ease of the installation of superconduction diaphragm, it is made to be easily fixed on the tram of rectangular waveguide, the waveguide 11 (12) that the rectangular waveguide of the present embodiment is Contraband type by two cross sections relatively fixedly forms, and the joint face of Contraband type waveguide is for formed rectangular waveguide is for the central E face of fixing superconduction diaphragm.That is, superconduction diaphragm should be fixedly installed on the joint face of Contraband type waveguide.
Rectangular waveguide adopts the mode of two Contraband type waveguide splicings to be conveniently accurately install superconduction diaphragm, and then guarantees that the filter performance parameters that product and software modeling design is consistent.And make the waveguide of Contraband type fix composition rectangular waveguide can to adopt various feasible fixed form, the present embodiment also illustrates a kind of comparatively practical fixed form: the concrete structure bolt hole that to be the relative edge of Contraband type waveguide stretch out in the projection 21 (22) and projection that are formed in the direction being parallel to joint face.The reliable fixing of two Contraband types waveguide can be realized by bolt.And adopting bolt to fix and also have certain benefit: bolt is demountable structure, superconduction diaphragm can being made to be installed on optimum position by repeating Installation And Test.
Superconduction diaphragm and rectangular waveguide fixing to meet relative position for standard, can adopt any fixed form in principle.As optimal way of the present invention, described superconduction diaphragm adopts the central E face being fixed on rectangular waveguide by the mode gripped.Its advantage is, without the need to additional technique or material, and adjustment can be repeated according to test result in fixed position.
Although the position of superconduction diaphragm can adjust according to test result in an embodiment of the present invention, but testing and debugging difficulty is larger after all, special in a fairly large number of situation of superconduction diaphragm, owing to affecting the many factors of result, so adjustment is had no way of doing it especially.In order to make multiple superconduction diaphragm be fixed to fast on the position of design, two or more superconduction diaphragm 31 is fixedly connected with by fixed head 32 by the present embodiment, and fixed head is used for being connected with rectangular waveguide.One of Main Function of fixed head is that the relative position of multiple superconduction diaphragm is accurately fixed.The multiple superconduction diaphragms fixing in order to the plate that makes to be fixed quick and precisely are installed on rectangular waveguide, present invention employs following preferred implementation: on the joint face of fixed head and the waveguide of Contraband type, be provided with mutually corresponding alignment mark.The effect of alignment mark is to make superconduction diaphragm entirety and rectangular waveguide quick and precisely contraposition, can adopt various mode such as such as scale, buckle etc.
The present invention proposes following optimal way to described alignment mark, described alignment mark is the contraposition through hole 4 (41 be arranged at respectively in the projection of fixed head and the waveguide of Contraband type, 42,43), described contraposition through hole is simultaneously as the bolt hole making the waveguide of Contraband type fix composition rectangular waveguide.This structure is simple, realizes technique simple, is beneficial to the standardization of products and produces.But, still there is alignment error in above-mentioned alignment mark mode, source of error is mainly the preset clearance of bolt and bolt hole.In order to overcome this problem, the present embodiment further provides improvement project, improvement project is: increase fixed muffle, the external diameter of fixed muffle is identical with above-mentioned contraposition through hole internal diameter, the internal diameter bolt external diameter of fixed muffle is corresponding, the length of fixed muffle is no more than the degree of depth sum of corresponding bolt hole, connects the waveguide of two Contraband types and realizes contraposition and fix in the contraposition through hole that described fixed muffle inserts accurate contraposition.
In order to reduce the insertion loss of device further, improve device performance, the present embodiment described rectangular waveguide inwall growth of superconductive film (superconducting thick-film) or adopt inwall growth to have the rectangular waveguide of superconducting film.Due to superconducting thick-film growth technique not innovative point of the present invention, belong to prior art category simultaneously, therefore do not describe in detail at this.
Be below a preferred implementation of the present invention: comprise the rectangular waveguide that grown on interior walls has superconducting film, and the growth of inserting in the central E face of square wave guide cavity have the diaphragm of superconducting film.Wherein rectangular waveguide is grown to be docked in opposite directions by the Contraband font waveguide cavity of superconducting film by two inwalls and forms.The growth that E face is inserted has the metallic membrane of superconducting film to be extruded in opposite directions by Contraband font waveguide cavity, and is fixed by screw.Diaphragm and rectangular waveguide acting in conjunction form resonant cavity one by one, and the coupling coefficient between the number resonant cavity of the resonant cavity of design is obtained by the design objective (as bandwidth of operation, ripple coefficient, insertion loss, Out-of-band rejection etc.) of filter.The size of resonator is determined by the centre frequency of the filter designed.
Middle diaphragm preferably adopts outer surface to grow the metallic membrane (mechanical property is better) having superconducting film.Be coupled by diaphragm between resonant cavity, wherein the width of diaphragm determines the size of the coupling coefficient between each resonant cavity, can adjust required coupling coefficient by regulating the width of matrix.Because the thickness of diaphragm is in actual applications usually very little, conveniently assemble, simultaneously in order to meet the demand of machining accuracy, the diaphragm integration that the present invention will use in filter, namely has in same growth on the metallic membrane of superconducting film and cuts out required diaphragm shapes (connecting the public part of a diaphragm as connecting plate).Because diaphragm directly can have influence on relative to the position of rectangular waveguide the performance that the resonance frequency of resonant cavity and coupling coefficient finally affect filter, based on this, patent of the present invention introduces a pin registration holes (contraposition through hole), and the diameter of registration holes is 0.2mm.By registration holes, realize the lean and correct assembly of filter.
Above-described embodiment is by former cavity, diaphragm integrated filter, change into left cavity, diaphragm, the filter that right cavity three part is formed, convenient installation, also greatly reduces difficulty of processing simultaneously, reduces processing cost, improve machining accuracy, simulation value and test value are farthest consistent.The filter of this kind of structure has the features such as insertion loss is little, Out-of-band rejection degree is high, squareness factor is good.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from essence of the present invention according to these technology enlightenment disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (7)
1.E face superconduction diaphragm filter, comprises rectangular waveguide, it is characterized in that, E face is fixed with two or more superconduction diaphragm in rectangular waveguide central authorities, and superconduction diaphragm is coupled with rectangular waveguide and forms resonant cavity; Adjacent superconduction diaphragm unequal interval distribution, adjacent superconduction diaphragm is along coplanar on rectangular waveguide length direction, the waveguide that rectangular waveguide is Contraband type by two cross sections relatively fixedly forms, and the joint face of Contraband type waveguide is for formed rectangular waveguide is for the central E face of fixing superconduction diaphragm.
2. superconduction diaphragm filter in E face according to claim 1, is characterized in that, the structure of fixing for the waveguide of the Contraband type bolt hole that to be the relative edge of Contraband type waveguide stretch out in the projection and projection that are formed in the direction being parallel to joint face.
3. superconduction diaphragm filter in E face according to claim 1 and 2, is characterized in that, superconduction diaphragm is clamped and fastened on the central E face of rectangular waveguide.
4. superconduction diaphragm filter in E face according to claim 3, is characterized in that, two or more superconduction diaphragm is fixedly connected with by fixed head, and fixed head is used for being connected with rectangular waveguide.
5. superconduction diaphragm filter in E face according to claim 4, is characterized in that, the joint face of fixed head and the waveguide of Contraband type is provided with mutually corresponding alignment mark.
6. superconduction diaphragm filter in E face according to claim 5, it is characterized in that, described alignment mark is be arranged at the contraposition through hole in the projection of fixed head and the waveguide of Contraband type respectively, and described contraposition through hole is simultaneously as the bolt hole making the waveguide of Contraband type fix composition rectangular waveguide.
7. the E face superconduction diaphragm filter according to any one claim of claim 4-6, is characterized in that, the inwall growth of described rectangular waveguide has superconducting film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566100.0A CN104319443A (en) | 2014-10-21 | 2014-10-21 | E-plane superconducting diaphragm filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566100.0A CN104319443A (en) | 2014-10-21 | 2014-10-21 | E-plane superconducting diaphragm filter |
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| CN104319443A true CN104319443A (en) | 2015-01-28 |
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| CN201410566100.0A Pending CN104319443A (en) | 2014-10-21 | 2014-10-21 | E-plane superconducting diaphragm filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935944A (en) * | 2017-03-14 | 2017-07-07 | 西安电子科技大学 | E faces bending rectangular waveguide tunable filter based on super transmission barrier film |
| CN107910624A (en) * | 2017-11-06 | 2018-04-13 | 江苏贝孚德通讯科技股份有限公司 | Coated by dielectric tunable filter and its design method, adjustable duplexer |
| CN110350287A (en) * | 2018-04-08 | 2019-10-18 | 中国科学院理化技术研究所 | A kind of torispherical resonant cavity closure method of discrimination |
| CN110920802A (en) * | 2019-11-15 | 2020-03-27 | 沪东中华造船(集团)有限公司 | Waveguide movable clamping piece, waveguide penetrating device and method for installing waveguide |
| CN113224481A (en) * | 2021-04-30 | 2021-08-06 | 电子科技大学 | Circularly symmetric TE0nMode filter |
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| US5750473A (en) * | 1995-05-11 | 1998-05-12 | E. I. Du Pont De Nemours And Company | Planar high temperature superconductor filters with backside coupling |
| CN1652393A (en) * | 2004-02-03 | 2005-08-10 | 株式会社Ntt都科摩 | Microwave filter |
| CN204088532U (en) * | 2014-10-21 | 2015-01-07 | 成都顺为超导科技股份有限公司 | A kind of E face superconduction diaphragm filter |
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2014
- 2014-10-21 CN CN201410566100.0A patent/CN104319443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5750473A (en) * | 1995-05-11 | 1998-05-12 | E. I. Du Pont De Nemours And Company | Planar high temperature superconductor filters with backside coupling |
| CN1652393A (en) * | 2004-02-03 | 2005-08-10 | 株式会社Ntt都科摩 | Microwave filter |
| CN204088532U (en) * | 2014-10-21 | 2015-01-07 | 成都顺为超导科技股份有限公司 | A kind of E face superconduction diaphragm filter |
Non-Patent Citations (2)
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| RAAFAT R. MANSOUR等: "Superconducting Millimeter-Wave E-Plane Filters", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
| V.N. SKRESANOV等: "Experience in developing Ka-band waveguide filter with HTS E-plane insert", 《PHYSICS AND ENGINEERING OF MICROWAVES，MILLIMETER AND SUBMILLIMETER WAVES（MSMW），2013 INTERNATIONAL KHARKOV SYMPOSIUM ON》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935944A (en) * | 2017-03-14 | 2017-07-07 | 西安电子科技大学 | E faces bending rectangular waveguide tunable filter based on super transmission barrier film |
| CN106935944B (en) * | 2017-03-14 | 2019-01-29 | 西安电子科技大学 | The face E based on super transmission diaphragm bends rectangular waveguide tunable filter |
| CN107910624A (en) * | 2017-11-06 | 2018-04-13 | 江苏贝孚德通讯科技股份有限公司 | Coated by dielectric tunable filter and its design method, adjustable duplexer |
| CN110350287A (en) * | 2018-04-08 | 2019-10-18 | 中国科学院理化技术研究所 | A kind of torispherical resonant cavity closure method of discrimination |
| CN110350287B (en) * | 2018-04-08 | 2021-04-06 | 中国科学院理化技术研究所 | Quasi-spherical resonant cavity closure discrimination method |
| CN110920802A (en) * | 2019-11-15 | 2020-03-27 | 沪东中华造船(集团)有限公司 | Waveguide movable clamping piece, waveguide penetrating device and method for installing waveguide |
| CN113224481A (en) * | 2021-04-30 | 2021-08-06 | 电子科技大学 | Circularly symmetric TE0nMode filter |
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Application publication date: 20150128 |