CN204088536U - A kind of E face superconduction iris waveguide filter - Google Patents
A kind of E face superconduction iris waveguide filter Download PDFInfo
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- CN204088536U CN204088536U CN201420611729.8U CN201420611729U CN204088536U CN 204088536 U CN204088536 U CN 204088536U CN 201420611729 U CN201420611729 U CN 201420611729U CN 204088536 U CN204088536 U CN 204088536U
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Abstract
Superconduction iris waveguide filter in E face of the present utility model insert in order to the E face between resonant cavity of solving have that difficulty of processing is large, particular location is difficult to fix, easily assembly difficulty that is broken and filter is large waits deficiency for superconductor substrate (as magnesium oxide substrate and lanthanum aluminate substrate), rectangular waveguide central authorities E face is fixed with two or more superconduction diaphragm, and superconduction diaphragm is coupled with rectangular waveguide and forms resonant cavity; The distribution of adjacent superconduction diaphragm unequal interval, 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.Wherein, 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.Beneficial effect is, millimeter wave band Insertion Loss is little and Out-of-band rejection degree is high, and Rectangular Waveguide Structure is easy to assembling.
Description
Technical field
The utility model belongs to millimeter wave technical field of filtering, relates to a kind of millimeter waveguide filter, and particularly a kind of central 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 shortcoming is that 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, the performance of raising filter, namely reduces insertion loss, increase Out-of-band rejection and and the squareness factor obtained seems more necessary.Along with the maturation of superconductor technology/technique, superconducting film has and 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, because the E face insertion between the resonant cavity of existing E facial mask sheet filter construction of single superconduction diaphragm exists, difficulty of processing is large, particular location is difficult to unfavorable factors such as fixing, the easy assembly difficulty that is broken and filter of superconductor substrate (as magnesium oxide substrate and lanthanum aluminate substrate) is large, therefore not yet finds that there is and superconduction diaphragm is applied to the filtering of E facial mask sheet millimeter wave to improve the technology of existing filter filtering performance.
Utility model content
The purpose of this utility model be between the resonant cavity in order to solve existing E facial mask sheet millimeter wave filter structure E face insert have that difficulty of processing is large, particular location is difficult to fix, easily assembly difficulty that is broken and filter is large waits deficiency for superconductor substrate (as magnesium oxide substrate and lanthanum aluminate substrate), proposes a kind of E face superconduction iris waveguide filter.
The technical solution of the utility model is: a kind of E face superconduction iris waveguide 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; The distribution of adjacent superconduction diaphragm unequal interval, 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; By the coupling coefficient between adjustment superconduction diaphragm width adjustment resonant cavity; The size changing rectangular waveguide can change the centre frequency of described filter; 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 in E face is magnesium oxide substrate or the lanthanum aluminate substrate of two-sided covering superconducting thin film.
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, the inwall growth of described rectangular waveguide has superconducting film.
Further, described two or more superconduction diaphragm is formed by the cutting of same superconduction diaphragm.
The beneficial effects of the utility model: superconduction iris waveguide filter in E face of the present utility model 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 utility model 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 iris waveguide filter in E face of the present utility model;
The detonation configuration that Fig. 2 is waveguide filter shown in Fig. 1 illustrates.
Embodiment
Embodiment of the present utility model designs according to principle of the present utility model, is further elaborated principle of the present utility model below in conjunction with accompanying drawing and specific embodiment.
As shown in Figures 1 and 2, the E face superconduction iris waveguide 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.Prior art theoretical category is belonged to owing to calculating rectangular waveguide and superconducting film chip size according to the design objective of filter and calculating the position of superconduction diaphragm in rectangular waveguide, common practise is belonged to for those of ordinary skill in the art, therefore does not launch to describe in detail at this.Thus the technology that this programme relates to this aspect realizes being clear and complete.Superconduction diaphragm in E face preferably adopts magnesium oxide substrate or the lanthanum aluminate substrate of two-sided covering superconducting thin film.
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 adopt various feasible fixed form, the present embodiment also illustrates a kind of comparatively practical fixed form: the concrete structure bolt hole 4 (41,42) 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 utility model, 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 embodiment of the present utility model, 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, and makes its relative position keep fixing, do not affect circuit parameter by the end connecting each superconduction diaphragm.The multiple superconduction diaphragms fixing in order to the plate that makes to be fixed quick and precisely are installed on rectangular waveguide, and the utility model have employed 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.
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 utility model, belong to prior art category simultaneously, therefore do not describe in detail at this.
Be below a preferred implementation of the present utility model: 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 can adopt the substrate (as: magnesium oxide substrate or lanthanum aluminate) of the low-dielectric loss of two-sided covering superconducting thin film, be coupled by superconduction diaphragm between resonant cavity, wherein the width of superconduction diaphragm determines the coupling coefficient between each resonant cavity, can adjust required coupling coefficient by regulating the width of superconduction matrix.
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.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 utility model 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).
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 utility model, should be understood to that protection range of the present utility model 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 the utility model essence according to these technology enlightenment disclosed in the utility model, and these distortion and combination are still in protection range of the present utility model.
Claims (7)
1. an E face superconduction iris waveguide 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; The distribution of adjacent superconduction diaphragm unequal interval, 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; By the coupling coefficient between adjustment superconduction diaphragm width adjustment resonant cavity; The size changing rectangular waveguide can change the centre frequency of described filter; 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.
2. waveguide filter according to claim 1, is characterized in that, superconduction diaphragm in E face is magnesium oxide substrate or the lanthanum aluminate substrate of two-sided covering superconducting thin film.
3. waveguide filter according to claim 1, is characterized in that, superconduction diaphragm is clamped and fastened on the central E face of rectangular waveguide.
4. waveguide filter according to claim 1 and 2, 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. waveguide filter 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. waveguide filter according to claim 5, is characterized in that, the inwall growth of described rectangular waveguide has superconducting film.
7. waveguide filter according to claim 6, is characterized in that, described two or more superconduction diaphragm is formed by the cutting of same superconduction diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611729.8U CN204088536U (en) | 2014-10-21 | 2014-10-21 | A kind of E face superconduction iris waveguide filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611729.8U CN204088536U (en) | 2014-10-21 | 2014-10-21 | A kind of E face superconduction iris waveguide filter |
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| CN204088536U true CN204088536U (en) | 2015-01-07 |
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| CN201420611729.8U Expired - Fee Related CN204088536U (en) | 2014-10-21 | 2014-10-21 | A kind of E face superconduction iris waveguide filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300191A (en) * | 2014-10-21 | 2015-01-21 | 成都顺为超导科技股份有限公司 | Waveguide filter for superconducting membranes on E surface |
-
2014
- 2014-10-21 CN CN201420611729.8U patent/CN204088536U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300191A (en) * | 2014-10-21 | 2015-01-21 | 成都顺为超导科技股份有限公司 | Waveguide filter for superconducting membranes on E surface |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20211021 |
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| CF01 | Termination of patent right due to non-payment of annual fee |