Title :
Dependence of microwave properties of HTS parallel coupled-line type 4-pole bandpass filters on enhanced electrodynamic properties of Ag-doped YBCO films
Author :
Kim, Jeha ; Han, Seok-Kil ; Kang, Kwang-Yong
Author_Institution :
Res. Dept., Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
We designed and fabricated high temperature superconducting (HTS) 4-pole Tchebyshev bandpass filters (BPFs) fabricated on Ag (5 wt.%, 10 wt.%, and 20 wt.%)-doped YBa2Cu3O7-δ thin films. The measured insertion losses of the filters appeared to interrelate strongly with Ag-doping while center frequency and bandwidth exhibited little change. The filter on Ag (10 wt.%)-doped YBCO film exhibited the lowest insertion loss of 0.22 dB at 37 K at the center frequency of 11.6 GHz. The bandwidth was 400 MHz
Keywords :
Chebyshev filters; band-pass filters; barium compounds; high-temperature superconductors; microwave filters; passive filters; silver; strip line filters; superconducting microwave devices; superconducting thin films; yttrium compounds; 0.22 dB; 11.6 GHz; 37 K; 4-pole bandpass filters; 400 MHz; Ag-doped YBCO films; HTSC bandpass filters; SHF; Tchebyshev bandpass filters; YBa2Cu3O7-δ thin films; YBaCuO:Ag; bandwidth; center frequency; electrodynamic properties; high temperature superconducting filter; insertion losses; microwave properties; parallel coupled-line type filters; Band pass filters; Bandwidth; Frequency measurement; High temperature superconductors; Insertion loss; Loss measurement; Superconducting filters; Superconducting microwave devices; Superconducting thin films; Yttrium barium copper oxide;
Conference_Titel :
Microwave and Optoelectronics Conference, 1997. Linking to the Next Century. Proceedings., 1997 SBMO/IEEE MTT-S International
Conference_Location :
Natal
Print_ISBN :
0-7803-4165-1
DOI :
10.1109/SBMOMO.1997.646844
