Microstrip ring resonator technique for measuring microwaveattenuation in high-Tc superconducting thin films |
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| Authors: | Takemoto JH Oshita FK Fetterman HR Kobrin P Sovero E |
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| Affiliation: | Dept. of Electr. Eng., California Univ., Los Angeles, CA; |
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| Abstract: | Microwave attenuation of high-Tc superconducting (HTS) films sputtered on MgO and ZrO2 were measured using a microstrip ring resonator circuit. The results of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O resonators were compared to those for gold-plated resonators of identical design. The losses of superconducting and gold-plated films were determined from unloaded Q-factor measurements. The attenuation of Y-Ba-Cu-O film on an MgO substrate is approximately 31% lower than that of gold films at 6.6 GHz and 33% lower at 19.2 GHz for temperatures below 50 K. The approach of using microstrips to characterize microwave losses shows the usefulness of HTS films in integrated circuit technology |
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