Summary
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High-Tc Superconducting Sharp Skirt Tunable Filters Hiroyuki FUKE Yoshiaki TERASHIMA Fumihiko AIGA Mutsuki YAMAZAKI Hiroyuki KAYANO Tatsunori HASHIMOTO Publication IEICE TRANSACTIONS on Electronics Vol.E85-C No.3 pp.704-707 Publication Date: 2002/03/01 Online ISSN: DOI: Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Special Issue on Superconductive Electronics) Category: Microwave Devices and Systems Keyword: superconducting device, microwave filter, sapphire substrate, mechanical tunable filter, Full Text: PDF>>
Summary: We developed a compact rf receiver subsystem using a high-Tc superconducting sharp skirt band-pass filter with a center frequency tuning function. A 24-pole hairpin-type 2 GHz microstrip-line filter was fabricated with YBa2Cu3Oy thin films deposited on a LaAlO3 substrate. Attenuation characteristics were more than 30 dB at 1 MHz apart from both the lower and the higher pass-band edges. For center frequency tuning, a 1-mm-thick dielectric sapphire plate was stacked on the filter, and the filtering characteristics were tuned by moving the plate using a piezoelectric bending actuator. The range of the center frequency modulation was more than 12 MHz with no degradation of the low-loss and sharp-skirt characteristics. | |||||
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