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Electrically Tunable Superconducting Microstrip Line Band-Pass Filter for Mobile Applications
Hiroyuki KAYANO Hiroyuki FUKE Fumihiko AIGA Mutsuki YAMAZAKI Yoshiaki TERASHIMA Tatsunori HASHIMOTO
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/02/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Superconducting Electronic Devices and Their Applications)
high-Tc superconductor, tunable filter, microstrip line filter, interdigital electrode,
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2 GHz band electrically tunable superconducting microstrip line band-pass filter was developed. The tunable filter used a thin interdigital electrode. The dielectric distribution of SrTiO3 substrate included a calculated nonlinear effect of the electrode and ferroelectric material. As a result, the tunable microstrip line filter design with interdigital electrode enabled calculation by the finite element method and the moment method. The tunable filter with a measured unloaded Q factor of 9700 and a frequency shift of 1.25 MHz was obtained.