CN109167127B - Low-temperature microwave filtering system based on adiabatic space electromagnetic coupling - Google Patents
Low-temperature microwave filtering system based on adiabatic space electromagnetic coupling Download PDFInfo
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- CN109167127B CN109167127B CN201810796875.5A CN201810796875A CN109167127B CN 109167127 B CN109167127 B CN 109167127B CN 201810796875 A CN201810796875 A CN 201810796875A CN 109167127 B CN109167127 B CN 109167127B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability
Abstract
The invention discloses a low-temperature microwave filtering system based on adiabatic space electromagnetic coupling, which can effectively solve the problem of large conduction heat leakage of a low-temperature microwave filtering assembly caused by direct connection of input and output cables; the microwave electronic system has the advantages that the overall size of the microwave electronic system is reduced, the performance is better, the power is higher, the miniaturization design is facilitated, the power consumption of a refrigeration platform is greatly reduced on the premise that the same number of low-temperature filter assemblies are additionally arranged, the size and the manufacturing cost of the superconducting electronic system are greatly reduced, and the realization of a plurality of paths of superconducting electronic systems which cannot be manufactured due to the limitation of low-temperature platforms in the prior art is possible.
Description
Technical Field
The invention belongs to the technical field of low-temperature microwave filtering, and particularly relates to a low-temperature microwave filtering system based on adiabatic space electromagnetic coupling.
Background
Microwave electronic systems play a crucial role in various communication systems, and technical indexes and characteristics of high-performance microwave systems play a critical role in the whole communication system.
Superconducting materials have been widely used in the fabrication of microwave devices since their discovery. However, the operating temperature of the high-temperature superconducting device or the low-temperature superconducting device which is commercially applied nowadays is below 100K (173 degrees centigrade below zero), and the requirement of lower operating environment temperature needs to be met.
The low-temperature filter assembly is an important microwave filter assembly, and its main function is to separate frequencies, i.e. to pass signals of certain frequencies and block signals of other frequencies, which are indispensable components for microwave communication. Compared with the conventional filter assembly, the low-temperature filter assembly has the characteristics of low insertion loss, steep band edge, high out-of-band rejection and performance closer to that of an ideal filter, and has wide application prospects in the aspects of mobile communication and weak signal detection.
The packaging method adopted by most microwave electronic systems applying the low-temperature filter assembly is shown in fig. 1, and comprises a vacuum cavity 1, a low-temperature platform 2 positioned in the vacuum cavity, and a low-temperature microwave filter assembly 3 arranged on the surface of the low-temperature platform 2; the input end of the low-temperature microwave filtering component 3 is connected with the microwave input end 6 of the air-tight microwave connector on the vacuum cavity through an input cable 4; the output end of the low-temperature microwave filtering component 3 is connected with the microwave output end 7 of the airtight microwave connector on the vacuum cavity through an output cable 5; because the input cable 4 and the output cable 5 are directly connected to the outside of the vacuum cavity 1, the input and output cables adopted by the packaging mode enable the low-temperature filtering component in a low-temperature state to be connected with the vacuum cavity in a room-temperature state, and generate large conduction heat leakage. The heat value is in direct proportion to the material heat conductivity and the sectional area of the microwave cable and in inverse proportion to the length of the microwave cable. Conduction leakage heat can cause non-uniform temperature of the superconducting filter assembly, thereby degrading device performance. In practical application, the performance of the low-temperature filter is continuously improved, meanwhile, conduction heat leakage is reduced, and the temperature uniformity of the superconducting filter component is ensured.
On the other hand, the refrigerator is an important component of the microwave electronic system, and the miniaturization of the modern microwave electronic system is increasingly demanding, but under the prior art means, the power of the refrigerator is generally proportional to the volume of the refrigerator, i.e. the larger the power to be consumed is, the larger the volume is, and the more the weight and the auxiliary facilities of the refrigerator are, which has become a bottleneck for the integration and application of the microwave electronic system. The more miniaturized refrigerators are the more difficult it is to increase the available power.
Disclosure of Invention
In view of this, the present invention provides a low-temperature microwave filtering system based on adiabatic space electromagnetic coupling, which reduces the conduction heat leakage of a low-temperature microwave device in a vacuum environment, improves the temperature uniformity of a low-temperature microwave filtering assembly, and realizes a high-performance low-temperature microwave filtering characteristic.
A low-temperature microwave filtering system based on electromagnetic coupling of a heat insulation space comprises a microwave input end (6), a microwave output end (7), a vacuum cavity (1), a low-temperature platform (2) positioned in the vacuum cavity, a low-temperature microwave filtering assembly (3) arranged on the surface of the low-temperature platform (2), an input coupling device (10) and an output coupling device (11) which are respectively connected with the microwave input end (6) and the microwave output end (7); the input coupling device (10) is over against the input end of the low-temperature microwave filtering component (3), and the input coupling device and the low-temperature microwave filtering component complete microwave signal transmission in a space electromagnetic coupling mode; the output coupling device (11) is over against the output end of the low-temperature filter assembly (3), and the output coupling device and the low-temperature filter assembly complete microwave signal transmission in a space electromagnetic coupling mode; and three-dimensional adjusting devices are arranged on the input coupling device (10) and the output coupling device (11) and are used for adjusting the relative positions of the input coupling device (10) relative to the input end of the warm microwave filtering component (3) and the output coupling device (11) and the output end of the low temperature filtering component (3).
The invention has the following beneficial effects:
(1) the low-temperature microwave filtering system can effectively solve the problem of large heat conduction leakage of the low-temperature microwave filtering assembly caused by direct connection of the input and output cables, and reduces the heat conduction leakage of the low-temperature microwave filtering assembly in a mode of thermal insulation space electromagnetic coupling, so that the overall temperature of the low-temperature microwave filtering assembly is uniform and stable, and the performance of the low-temperature microwave filtering assembly is more stable and excellent.
(2) Compared with the prior cable with more excellent usability, namely the cable is thicker and shorter, the low-temperature microwave filtering system has the advantages that the overall volume of a microwave electronic system is reduced, the performance is better, the power is higher, and the miniaturization design is facilitated.
(3) The low-temperature microwave filtering system greatly reduces the power consumption of the refrigeration platform on the premise of additionally arranging the same number of low-temperature filtering assemblies, so that the volume and the manufacturing cost of a superconducting electronic system are greatly reduced.
(4) The low-temperature microwave filtering system of the invention enables the realization of some original multi-path superconducting electronic systems which cannot be manufactured due to the limitation of a low-temperature platform.
Drawings
FIG. 1 is a schematic diagram of the components of a conventional low-temperature microwave electronic system;
FIG. 2 is a schematic diagram of the electromagnetic coupling mode of a microwave device of a conventional low-temperature microwave electronic system;
FIG. 3 is a schematic diagram of the composition of a low-temperature microwave electronic system based on adiabatic space electromagnetic coupling according to the present invention;
FIG. 4 is an enlarged view of the circle shown in FIG. 3, illustrating the electromagnetic coupling of the normal temperature and low temperature microwave electronic device according to the present invention;
the device comprises a vacuum cavity 1, a low-temperature platform 2, a low-temperature microwave filtering component 3, an input cable 4, an output cable 5, a microwave input end 6, a microwave output end 7, a three- dimensional adjusting device 8,9, an input coupling device 10 and an output coupling device 11.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 3, which is a schematic diagram of the composition of the low-temperature microwave electronic system based on the adiabatic space electromagnetic coupling of the present invention, the system also includes a vacuum chamber 1, a low-temperature platform 2 located inside the vacuum chamber, and a low-temperature microwave filter assembly 3 disposed on the surface of the low-temperature platform 2; unlike the conventional low-temperature microwave electronic system, the input coupling device 10 and the output coupling device 11 are arranged to replace the direct connection mode of the input cable 4 and the output cable 5; the input coupling device 10 is over against the input end of the low-temperature microwave filtering component 3, and the input coupling device and the input end are not in contact; the output coupling device 11 is over against the output end of the low-temperature filter component 3, and a certain gap is also reserved; different from the electromagnetic coupling mode of the conventional low-temperature microwave electronic system shown in fig. 2, the space electromagnetic coupling mode is adopted between the input coupling device 10 and the input end of the low-temperature filter component 3 and between the output coupling device 11 and the output end of the low-temperature filter component 3, and because the mutually overlapped electric field and magnetic field exist between the microwave circuit resonators, when the overlapped electric field meets certain frequency and position matching, resonance coupling is generated, and the selective transmission of microwave signals is realized; the invention respectively arranges a three- dimensional adjusting device 8,9 for an input coupling end 10 and an output coupling end 11, which are used for adjusting the space three-dimensional position adjustment of the input coupling end 10 and the output coupling end 11 to adjust the interaction between the electric field and the magnetic field of two opposite microwave devices, and when the adjustment meets a certain position relation, the upper microwave device and the lower microwave device generate resonance coupling to realize the selective transmission of microwave signals.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A low-temperature microwave filtering system based on electromagnetic coupling of an insulated space comprises a microwave input end (6), a microwave output end (7), a vacuum cavity (1), a low-temperature platform (2) positioned in the vacuum cavity and a low-temperature microwave filtering assembly (3) arranged on the surface of the low-temperature platform (2), and is characterized by further comprising an input coupling device (10) and an output coupling device (11) which are respectively connected with the microwave input end (6) and the microwave output end (7); the input coupling device (10) is over against the input end of the low-temperature microwave filtering component (3), and the input coupling device and the low-temperature microwave filtering component complete microwave signal transmission in a space electromagnetic coupling mode; the output coupling device (11) is over against the output end of the low-temperature microwave filtering component (3), and the output coupling device and the low-temperature microwave filtering component complete microwave signal transmission in a space electromagnetic coupling mode; because the mutually overlapped electric field and magnetic field exist between the microwave circuit resonators, when the overlapped electromagnetic field meets certain frequency and position matching, resonance coupling is generated, and selective transmission of microwave signals is realized; and three-dimensional adjusting devices are arranged on the input coupling device (10) and the output coupling device (11) and are used for adjusting the relative positions of the input coupling device (10) relative to the input end of the low-temperature microwave filtering assembly (3) and the output end of the output coupling device (11) and the low-temperature microwave filtering assembly (3) so as to adjust the interaction between the electric field and the magnetic field of the two relative microwave devices, and when the input coupling device (10) and the output coupling device (11) are adjusted to meet a certain position relation, the upper microwave device and the lower microwave device are enabled to generate resonance coupling, so that the selective transmission of.
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| CN201810796875.5A CN109167127B (en) | 2018-07-19 | 2018-07-19 | Low-temperature microwave filtering system based on adiabatic space electromagnetic coupling |
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| CN201810796875.5A CN109167127B (en) | 2018-07-19 | 2018-07-19 | Low-temperature microwave filtering system based on adiabatic space electromagnetic coupling |
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| CN109167127B true CN109167127B (en) | 2020-06-23 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336018A (en) * | 1999-02-26 | 2002-02-13 | 富士通株式会社 | Superconducting filter module, superconducting filter, and heat-insulated coaxial cable |
| US6367266B1 (en) * | 1998-10-07 | 2002-04-09 | Fujitsu Limited | Heat insulation chamber, thermostatic chamber and cryostat |
| JP3392367B2 (en) * | 1999-03-12 | 2003-03-31 | 株式会社デンソー | Non-contact type high frequency transmission device |
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2018
- 2018-07-19 CN CN201810796875.5A patent/CN109167127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6367266B1 (en) * | 1998-10-07 | 2002-04-09 | Fujitsu Limited | Heat insulation chamber, thermostatic chamber and cryostat |
| CN1336018A (en) * | 1999-02-26 | 2002-02-13 | 富士通株式会社 | Superconducting filter module, superconducting filter, and heat-insulated coaxial cable |
| JP3392367B2 (en) * | 1999-03-12 | 2003-03-31 | 株式会社デンソー | Non-contact type high frequency transmission device |
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