Title :
Tunable superconducting band-stop filters
Author :
Gevorgian, S.S. ; Carlsson, E.F. ; Kollberg, E.L. ; Wikborg, E.
Author_Institution :
Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
Electrically tunable notch filters based on bulk single crystal SrTiO/sub 3/ (STO) parallel-plate resonators with High Temperature Superconducting (HTS) electrodes are reported. The filters operate at temperatures below 90 K. The center frequency, located in the range 0.5-2.0 GHz, can be controlled with an applied voltage, in some cases more than 100%. Filters are designed for operation at high microwave power levels in advanced wireless communication systems.
Keywords :
UHF filters; circuit tuning; ferroelectric devices; high-temperature superconductors; microwave filters; notch filters; passive filters; resonator filters; superconducting microwave devices; superconducting thin films; 0.5 to 2 GHz; 90 K; HTS electrodes; HTSC films; STO parallel-plate resonators; SrTiO/sub 3/; bulk single crystal SrTiO/sub 3/; electrically tunable notch filters; high microwave power levels; superconducting band-stop filters; wireless communication systems; Electrodes; Frequency; High temperature superconductors; Microwave filters; Resonator filters; Superconducting filaments and wires; Superconducting filters; Superconducting microwave devices; Temperature control; Temperature distribution;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705168
