CN104300197A - Superconducting resonator and superconducting filter composed of superconducting resonators - Google Patents
Superconducting resonator and superconducting filter composed of superconducting resonators Download PDFInfo
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- CN104300197A CN104300197A CN201410563981.0A CN201410563981A CN104300197A CN 104300197 A CN104300197 A CN 104300197A CN 201410563981 A CN201410563981 A CN 201410563981A CN 104300197 A CN104300197 A CN 104300197A
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Abstract
The invention discloses a high-performance and small-size superconducting resonator and a superconducting filter composed of superconducting resonators, wherein sapphire and high-temperature superconducting materials are applied to the design of the resonator or the design of the filter in a combined mode. The resonator comprises a waveguide resonant cavity and a cylindrical medium located in the center of the waveguide resonant cavity, one end of the cylindrical medium is connected with the bottom face of the waveguide resonant cavity to form a short-circuit end, the other end of the cylindrical medium is opened, the bottom face, connected with the cylindrical medium, of the waveguide resonant cavity is a short-circuit face, the short-circuit face comprises a superconducting film, and the cylindrical medium is made of sapphire. The superconducting resonator and the superconducting filter have the advantages that the filter has extremely low insertion loss (less than 0.1 dB), a rectangle coefficient approaching one and a small size; the insertion loss of the filter is reduced, more levels of filters can be designed accordingly, out-of-band rejection of the filters can be improved, and finally, the performance of the millimeter wave filters can be greatly improved.
Description
Technical field
The invention belongs to millimeter waveguide technical field of filtering, relate to millimeter waveguide resonator and the filter based on described resonator.
Background technology
Along with developing rapidly of modern mobile communication technology, frequency spectrum resource is more and more in short supply, makes the requirement of the front end receiver equipment to wireless communication system more and more higher.In order to reduce the interference between communication system, require that the filter of receiving front-end has higher squareness factor (namely band edge is more precipitous) and lower insertion loss.At present, along with the development of high temperature superconductor technology and cryogenic vacuum Refrigeration Technique, superconduction is by the design and fabrication using filter more and more widely.The quality factor (can reach 5000) of sapphire also Yin Qigao, are widely applied to phase noise oscillator.But, in resonator or design of filter, have no sapphire application.。
Summary of the invention
The present invention by sapphire and high temperature superconducting materia connected applications in resonator or design of filter, object be design a kind of high-performance, small size superconducting resonator and based on a kind of super conductive filter with same advantage of described resonator design.
Technical scheme of the present invention is: a kind of superconducting resonator, comprise waveguide resonant cavity and the cylindrical di being positioned at waveguide resonant cavity magnetic field center, it is characterized in that, one end of described cylindrical di and a bottom surface of waveguide resonant cavity are connected to form short-circuit end, the other end is opened a way, the bottom surface that waveguide resonator connects cylindrical di is short circuit face, and described short circuit bread is containing superconducting film.
Further, above-mentioned cylindrical di material is sapphire.
Further, above-mentioned waveguide resonant cavity is one of square wave guide cavity or circular waveguide chamber.
Further, the superconducting film above-mentioned short circuit face comprised is the superconducting thick-film being plated on wave guide resonance inner cavity surface.
Super conductive filter, it is characterized in that, comprise at least 2 superconducting resonators be of coupled connections, described superconducting resonator comprises waveguide resonant cavity and is positioned at the cylindrical di of waveguide resonant cavity magnetic field center, one end of described cylindrical di and a bottom surface of waveguide resonant cavity are connected to form short-circuit end, the other end is opened a way, and the bottom surface that waveguide resonator connects cylindrical di is short circuit face, and described short circuit bread is containing superconducting film.
Further, above-mentioned cylindrical di material is sapphire.
Further, above-mentioned waveguide resonant cavity is square wave guide cavity.
Further, direct-coupling, probe magnetic coupling, one of probe electric coupling or probe cross-couplings is coupled as between above-mentioned superconducting resonator.
Further, the input of super conductive filter and output are probe magnetic coupling, one of probe electric coupling or probe cross-couplings.
Further, the above-mentioned probe for being coupled is metal bar or sheet metal, described metal bar or sheet metal pass the common wall of adjacent resonators, in the electric field that resonator is inserted at two ends respectively or magnetic field, and bend the end of metal bar or sheet metal is positioned on same electric field or magnetic field intensity curved surface according to electric field or magnetic field intensity space distribution modes.
Beneficial effect of the present invention: superconducting resonator of the present invention makes full use of the advantage of sapphire and superconduction bi-material, HFSS is utilized to carry out the analysis with field structure of building of model, the filter designed has pole low insertion loss (being less than 0.1dB), level off to 1 squareness factor and little volume.The electromagnetic field intensity distribution in resonant cavity can be affected to a certain extent due to medium/sapphire introducing, it is made to draw close centered by medium/sapphire, in resonant cavity, field strength distribution changes the low of the traditional direct-coupling efficiency caused, the present invention is according to field strength distribution situation design coupling probe, form the magnetic coupling between coupler, electric coupling or cross-couplings, effectively ensure that the efficiency be coupled between coupler.Introduce superconduction, particularly introduce superconducting film at medium short-circuit end, the energy loss that the heavy current avoiding short-circuit end formation causes.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 the structural representation of a specific embodiment of superconducting resonator of the present invention;
Fig. 2 is the super conductive filter structural representation of the present invention based on the resonator design shown in Fig. 1.
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, in the present embodiment, superconducting resonator comprises rectangular-wave resonant cavity 1 and is positioned at the cylindrical di 2 of rectangular-wave resonant cavity magnetic field center, one end of cylindrical di 2 and a bottom surface of waveguide resonant cavity are connected to form short-circuit end, the other end is opened a way, the bottom surface that waveguide resonator connects cylindrical di is short circuit face, and described short circuit bread is containing superconducting film 3.The convenient installation of resonator that cylindrical di adopts the form of short at one end one end open circuit can make on the one hand to design is fixing; On the other hand, relative to the structural design of two ends open circuit, the program effectively can reduce the volume of resonator, is conducive to the miniaturization of device.Consider the advantage of sapphire at dielectric constant, in the present embodiment, cylindrical di material is preferably sapphire.
Above-mentioned rectangular-wave resonant cavity only principle of the present invention and a kind of form of expression specifically exemplified for convenience of description, according to thought of the present invention, above-mentioned rectangular-wave resonant cavity can also change other forms of waveguiding structures such as doing circular waveguide chamber.As a kind of optimal way, the superconducting film that above-mentioned short circuit face comprises is the superconducting thick-film being plated on wave guide resonance inner cavity surface.
As shown in Figure 2, the super conductive filter of the present embodiment comprises at least 2 superconducting resonators be of coupled connections, and is specially 4 resonators in the present embodiment, and wherein the structure of resonator is identical with the superconducting resonator shown in Fig. 1.In like manner, in the present embodiment, cylindrical di material is preferably sapphire.Because direct-coupling belongs to the coupled mode between the resonator commonly used this area, the present embodiment can adopt this form equally.But because the introducing of sapphire or other media can make the magnetic distribution in resonant cavity draw close to medium, cause the electromagnetic field field intensity in other places in chamber more weak, continuation employing direct coupling system may have influence on the energy transfer efficiency between coupler.So, abandon direct coupling system in the present embodiment, then adopt the coupled modes such as probe magnetic coupling, probe electric coupling or probe cross-couplings.The problems referred to above are for the input of filter and output coupling is same is suitable for.Concrete, in order to improve coupling efficiency further, probe for being coupled specifically is selected as metal bar or sheet metal in the present embodiment, it is metal bar 4 shown in Fig. 2, described metal bar 4 or sheet metal pass the common wall of adjacent resonators, in the electric field that resonator is inserted at two ends respectively or magnetic field, and bend the end of metal bar or sheet metal is positioned on same electric field or magnetic field intensity curved surface according to electric field or magnetic field intensity space distribution modes.
Common practise according to this area is understood that: the size changing rectangular waveguide can change the centre frequency of described filter.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.
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.
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 (10)
1. a superconducting resonator, comprise waveguide resonant cavity and the cylindrical di being positioned at waveguide resonant cavity magnetic field center, it is characterized in that, one end of described cylindrical di and a bottom surface of waveguide resonant cavity are connected to form short-circuit end, the other end is opened a way, the bottom surface that waveguide resonator connects cylindrical di is short circuit face, and described short circuit bread is containing superconducting film.
2. superconducting resonator according to claim 1, is characterized in that, cylindrical di material is sapphire.
3. superconducting resonator according to claim 1 and 2, is characterized in that, waveguide resonant cavity is one of square wave guide cavity or circular waveguide chamber.
4. the superconducting resonator according to any one claim of claim 1-3, is characterized in that, the superconducting film that short circuit face comprises is the superconducting thick-film being plated on wave guide resonance inner cavity surface.
5. super conductive filter, it is characterized in that, comprise at least 2 superconducting resonators be of coupled connections, described superconducting resonator comprises waveguide resonant cavity and is positioned at the cylindrical di of waveguide resonant cavity magnetic field center, one end of described cylindrical di and a bottom surface of waveguide resonant cavity are connected to form short-circuit end, the other end is opened a way, and the bottom surface that waveguide resonator connects cylindrical di is short circuit face, and described short circuit bread is containing superconducting film.
6. super conductive filter according to claim 5, is characterized in that, cylindrical di material is sapphire.
7. the super conductive filter according to claim 5 or 6, is characterized in that, waveguide resonant cavity is square wave guide cavity.
8. super conductive filter according to claim 7, is characterized in that, is coupled as direct-coupling, probe magnetic coupling, one of probe electric coupling or probe cross-couplings between superconducting resonator.
9. super conductive filter according to claim 7, is characterized in that, the input of super conductive filter and output are probe magnetic coupling, one of probe electric coupling or probe cross-couplings.
10. the super conductive filter according to any one claim of claim 5-9, it is characterized in that, probe for being coupled is metal bar or sheet metal, described metal bar or sheet metal pass the common wall of adjacent resonators, in the electric field that resonator is inserted at two ends respectively or magnetic field, and bend the end of metal bar or sheet metal is positioned on same electric field or magnetic field intensity curved surface according to electric field or magnetic field intensity space distribution modes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410563981.0A CN104300197A (en) | 2014-10-21 | 2014-10-21 | Superconducting resonator and superconducting filter composed of superconducting resonators |
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| CN201410563981.0A CN104300197A (en) | 2014-10-21 | 2014-10-21 | Superconducting resonator and superconducting filter composed of superconducting resonators |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654498A (en) * | 2016-12-14 | 2017-05-10 | 电子科技大学 | Cavity resonator and filter based on deformable high-temperature superconducting material |
| CN106654501A (en) * | 2016-12-15 | 2017-05-10 | 电子科技大学 | Manufacturing method for cavity resonator based on deformable high-temperature superconducting material |
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| US5608363A (en) * | 1994-04-01 | 1997-03-04 | Com Dev Ltd. | Folded single mode dielectric resonator filter with cross couplings between non-sequential adjacent resonators and cross diagonal couplings between non-sequential contiguous resonators |
| WO1997019486A1 (en) * | 1995-11-20 | 1997-05-29 | Forschungszentrum Jülich GmbH | Microwave resonator, method of producing such a resonator and method of compensating the temperature coefficient of the resonant frequency of a microwave resonator |
| CN1192593A (en) * | 1996-11-08 | 1998-09-09 | Kmw株式会社 | Dual-resonator microwave filter |
| CN1666379A (en) * | 2002-05-07 | 2005-09-07 | 微波与材料设计Ip私人有限公司 | Filter assembly |
| CN204088545U (en) * | 2014-10-21 | 2015-01-07 | 成都顺为超导科技股份有限公司 | The super conductive filter of superconducting resonator and formation |
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2014
- 2014-10-21 CN CN201410563981.0A patent/CN104300197A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5608363A (en) * | 1994-04-01 | 1997-03-04 | Com Dev Ltd. | Folded single mode dielectric resonator filter with cross couplings between non-sequential adjacent resonators and cross diagonal couplings between non-sequential contiguous resonators |
| WO1997019486A1 (en) * | 1995-11-20 | 1997-05-29 | Forschungszentrum Jülich GmbH | Microwave resonator, method of producing such a resonator and method of compensating the temperature coefficient of the resonant frequency of a microwave resonator |
| CN1192593A (en) * | 1996-11-08 | 1998-09-09 | Kmw株式会社 | Dual-resonator microwave filter |
| CN1666379A (en) * | 2002-05-07 | 2005-09-07 | 微波与材料设计Ip私人有限公司 | Filter assembly |
| CN204088545U (en) * | 2014-10-21 | 2015-01-07 | 成都顺为超导科技股份有限公司 | The super conductive filter of superconducting resonator and formation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654498A (en) * | 2016-12-14 | 2017-05-10 | 电子科技大学 | Cavity resonator and filter based on deformable high-temperature superconducting material |
| CN106654498B (en) * | 2016-12-14 | 2020-08-18 | 电子科技大学 | Cavity resonator and filter based on deformable high-temperature superconducting material |
| CN106654501A (en) * | 2016-12-15 | 2017-05-10 | 电子科技大学 | Manufacturing method for cavity resonator based on deformable high-temperature superconducting material |
| CN106654501B (en) * | 2016-12-15 | 2019-04-23 | 电子科技大学 | Cavity resonator production method based on deformable high temperature superconducting materia |
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Application publication date: 20150121 |