Title :
HTS/ferroelectric devices for microwave applications
Author :
Gevorgian, S.S. ; Carlsson, E.F. ; Rudner, S. ; Helmersson, U. ; Kollberg, E.L. ; Wikborg, E. ; Vendik, O.G.
Author_Institution :
Dept. of Microwave Technol., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
6/1/1997 12:00:00 AM
Abstract :
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.
Keywords :
barium compounds; ferroelectric devices; high-temperature superconductors; strontium compounds; superconducting microwave devices; yttrium compounds; 0.5 to 2.0 GHz; HTS/ferroelectric device; STO; YBCO; YBaCuO-SrTiO/sub 3/; bulk single crystal; coplanar waveguide; delay line; electrically tunable high power filter; high temperature superconductor; inter-digital capacitor; loss; low power microwave device; microwave communication; modelling; parallel-plate resonator; phase shifter; thin film; Coplanar waveguides; Ferroelectric devices; Ferroelectric materials; High temperature superconductors; Microwave devices; Phase shifters; Superconducting filters; Superconducting microwave devices; Superconducting thin films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
