HTS/ferroelectric devices for microwave applications
Gevorgian, S.S.; Carlsson, E.F.; Rudner, S.; Helmersson, U.; Kollberg, E.L.; Wikborg, E.; Vendik, O.G.
Applied Superconductivity, IEEE Transactions on
Volume 7, Issue 2, Jun 1997 Page(s):2458 - 2461
Digital Object Identifier   10.1109/77.621737
Summary:High Temperature Superconducting (HTS, e.g. YBCO) microwave devices based on bulk or thin film ferroelectrics (e.g. Strontium Titanate-STO) are studied theoretically and experimentally. YBCO/STO/YBCO parallel-plate resonators and based on bulk single crystal STO are for electrically tunable high power filters, phase shifters and other devices in the frequency band 0.5-2.0 GHz of advanced microwave communication systems. Thin film YBCO/STO Inter-digital Capacitors (IDC), Coplanar Waveguides (CPW) phase shifters/delay lines are also designed and studied experimentally for low microwave power applications. Modelling problems of these devices and microwave losses in ferroelectrics are also discussed

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