Title :
Magnetically tunable superconductor filters using yttrium iron garnet films
Author :
Tsutsumi, Makoto ; Fukusako, Takeshi ; Shimasaki, Hitoshi
Author_Institution :
Kyoto Inst. of Technol., Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
Magnetically tunable superconducting single-resonator filters using YIG films have been demonstrated experimentally. Tunability of 400 MHz at a center frequency of 6 GHz was achieved for a half wavelength microstrip comprising a YIG-YBCO-MgO composite structure. The reason why the quality factor of the filter is relatively low is possibly due to an increase of the magnetic linewidth ΔH at liquid nitrogen temperature. The theory on dispersion relation of the filter is also presented
Keywords :
Q-factor; barium compounds; circuit tuning; garnets; high-temperature superconductors; magnesium compounds; magnetic microwave devices; microstrip filters; superconducting microwave devices; yttrium compounds; 6 GHz; YFe5O12-YBa2Cu3O7-MgO; YIG films; YIG-YBCO-MgO; YIG-YBa2Cu3O7-MgO; dispersion relation theory; half wavelength microstrip line; magnetic linewidth; magnetically tunable superconducting single-resonator filters; quality factor; Frequency; Iron; Magnetic films; Magnetic separation; Microstrip; Q factor; Superconducting films; Superconducting filters; Superconducting magnets; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
