MEASUREMENTS AND MODELING OF THE KINETIC INDUCTANCE IN HIGH CRITICAL-TEMPERATURE SUPERCONDUCTING TRANSMISSION-LINES

This paper presents both experimental investigations and modeled resul ts on high temperature superconductive (HTS) microstrip lines. Our mod eling concept is based on solving integral equations using the moment method. An electromagnetic characterization YBa2Cu3O7-x of an inverted microstrip line has been carried out in order to validate the model, in the 5 MHz-3 GHz bandwidth and in the 10 K-85 K temperature range. E xperimental results are presented and a good agreement is observed wit h modeling data. It is shown that the two-fluid model is applicable ov er a wide range of temperatures below the critical temperature. The co mparison of the bipolaron model and the classical London model is carr ied out. In addition, different thin film deposition techniques have b een investigated. Other important issues such as accurate analytic exp ression of the kinetic inductance are addressed for these structures.