A two dielectric resonator method using two sapphire-rod resonators has been proposed as the most promising method to measure surface resistance Rs of high-Tc superconductor films precisely. In this paper, the frequency dependence of the Rs measurement precision is estimated analytically, taking account of the frequency dependences of tanδ of sapphire and Rs of YBCO films in the frequency range from 10 to 50 GHz. The temperature dependence of Rs for YBCO films was measured at 20 GHz. The measurement precision of Rs=0.16 mΩ at 20 K was estimated to be 5 percents
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Microwave Conference, 2000 Asia-Pacific
Date of Conference: 2000