Title :
Magnetically tunable superconducting microstrip resonators using yttrium iron garnet single crystals
Author :
Tsutsumi, M. ; Fukusako, T.
Author_Institution :
Dept. of Electron. & Inf. Sci., Kyoto Inst. of Technol., Japan
Abstract :
A magnetically tunable microstrip superconducting resonator using an yttrium iron garnet (YIG) single crystal was demonstrated experimentally. Tunability of 200 MHz at a center frequency of 5.3 GHz was observed, and a quality factor of 965 with minimum insertion loss of 19.5 dB was measured for a half-wavelength microstrip line consisting of a YIG-YBCO-MgO composite structure. The dispersion relation of the resonator was analyzed using the spectral domain method and discussed with experimental results on the mixed states of TEM and magnetostatic wave modes.
Keywords :
Q-factor; barium compounds; dispersion (wave); dispersion relations; garnets; high-temperature superconductors; magnesium compounds; magnetic microwave devices; magnetostatic wave devices; microstrip filters; microstrip resonators; spectral-domain analysis; superconducting microwave devices; superconducting resonators; yttrium compounds; 19.5 dB; 200 MHz; 5.3 GHz; MgO; TEM modes; YFe5O12-YBa2Cu3O7-MgO; YIG-YBa/sub 2/Cu/sub 3/O/sub 7/-MgO; dispersion relation; half-wavelength microstrip line; insertion loss; magnetically tunable resonators; magnetostatic wave modes; quality factor; spectral domain method; superconducting microstrip resonators; Frequency measurement; Garnets; Insertion loss; Iron; Loss measurement; Magnetostatic waves; Microstrip resonators; Q factor; Superconducting magnets; Yttrium;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.596612
