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APPARATUS AND METHOD OF IMPLEMENTING A COMPACT AND TUNABLE MICROWAVE RESONATOR USING NbN KINETIC INDUCTANCE
APPARATUS AND METHOD OF IMPLEMENTING A COMPACT AND TUNABLE MICROWAVE RESONATOR USING NbN KINETIC INDUCTANCE
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机译:使用NBN动感实现紧凑型微波谐振器的装置和方法
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摘要
An apparatus and method for implementing a compact and tunable microwave resonator using NbN kinetic inductance, comprising: a DC source, an attenuator, an oxygen-free copper cavity, a superconducting coil, a first-stage amplifier, a second-stage amplifier, a vector network analyzer and a control computer, a small-sized tunable resonator whose size is reduced by 10-20 times as compared with an ordinary thin film microwave resonator is implemented in a microwave frequency band by using high kinetic inductance of an ultra-thin NbN thin film in a superconducting state, the tunability of the resonator lies in that the ultra-thin NbN thin film serves as the LC resonance circuit, a dc-SQUID is connected to the end of the resonator, and a change in the external magnetic field causes a change in the equivalent inductance of the dc-SQUID, thereby changing the total inductance of the resonator and modulating the resonant frequency of the resonance circuit.
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