高溫超導薄膜微波表面電阻測試方法的改進

介紹了一種12 GHz附近的高溫超導薄膜微波表面電阻Rs測試系統(tǒng)。該系統(tǒng)采用低損耗高介電常數(shù)的藍寶石，構(gòu)成工作在TE011+δ諧振模式的介質(zhì)諧振器，在77 K時，利用測量介質(zhì)諧振器的Q值得到單片高溫超導薄膜的微波表面電阻Rs。分析了其耦合裝置對校準物理模型的影響，通過改進耦合裝置可提高系統(tǒng)測試的準確度。該系統(tǒng)與前三代測試系統(tǒng)進行比較，其測試準確度有明顯地提高。A kind of High Tc superconductive thin film microwave surface resistance test system around 12 GHz is described in this paper. The surface resistance of a single piece of high Tc superconductive thin film can be measured by a sapphire resonator with TE011+δ mode non-destructivity, at 77 K. By measuring the value of the resonator’s quality factor, the surface resistance of testing sample can be also determined. And the influence of coupling device on calibrating physical model is also analyzed in this paper. Then testing accuracy of the system can be raised by improving coupling device. The test system is compared with former generations, and the testing accuracy is raised obviously.