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This paper presents both experimental investigations and modeled results on high temperature superconductive (HTS) microstrip lines.Our modeling concept is based on solving integral equations using the moment method. An electromagnetic characterization YBaz Cu307-= 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. Experimental results are presented and a good agreement is observed with modeling data. It is shown that the two-fluid model is applicable over a wide range of temperatures below the critical temperature. The comparison of the bipolaron model and the classical London model is carried out. In addition, different thin film deposition techniques have been investigated. Other important issues such as accurate analytic expression of the kinetic inductance are addressed for these structures.

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