Title :
Quasi-optical millimeter-wave band-pass filters using high-T c superconductors
Author :
Zhang, Dawei ; Matloubian, Mehran ; Kim, Tae Wan ; Fetterman, Harold R. ; Chou, Kevin ; Praskash, S. ; Deshpandey, C.V. ; Bunshah, Rointan F. ; Daly, Kenneth
Author_Institution :
California Univ., Los Angeles, CA, USA
fDate :
9/1/1991 12:00:00 AM
Abstract :
Quasioptical millimeter-wave band-pass filters using YBa2 Cu3O7 high-Tc superconducting films were fabricated on MgO and LaAlO3 substrates. Transmitted power through the filter was investigated in the 75 GHz to 110 GHz frequency range at temperatures ranging from 15 to 300 K. At 15 K the measured center frequency and the bandwidth of the superconducting filter were 92 GHz and 0.85 GHz, respectively. Measurements of YBa2Cu3O7 filters were compared with similar filters fabricated using gold. At 15 K and 92 GHz, an improvement of 75% in the quality factor of the superconducting filter was obtained compared with a similar gold filter
Keywords :
Q-factor; band-pass filters; barium compounds; high-temperature superconductors; microwave filters; passive filters; strip line components; superconducting devices; superconducting thin films; yttrium compounds; 0.85 GHz; 15 to 300 K; 75 to 110 GHz; EHF; LaAlO3 substrates; MgO substrates; Q-factor; YBa2Cu3O7; band-pass filters; bandwidth; center frequency; high temperature superconductors; high-Tc superconducting films; quality factor; quasioptical filters; Band pass filters; Bandwidth; Frequency measurement; Gold; Power filters; Power measurement; Q factor; Superconducting films; Superconducting filters; Temperature distribution;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
