Title :
Miniaturized 3 GHz cross-coupled planar microwave filters
Author :
Zeng, Hui-Kai ; Hsiao, Anting ; Hsu, Wei-Hsiu ; Wu, Shao-Wei ; Lin, Jiunn-Yuan ; Wu, Kaung-Hsiung ; Juang, Jenh-Yih ; Uen, Tseng-Ming ; Gou, Yi-Shun ; Kuo, Jen-Tsai
Author_Institution :
Dept. of Electrophys., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
fDate :
3/1/2004 12:00:00 AM
Abstract :
Cross-coupled planar microwave filters were fabricated using YBa2Cu3O7-δ superconducting thin films deposited on both sides of a LaAlO3 single crystal substrate by pulsed laser deposition. The hairpin resonator geometry allows one to miniaturize the 3-GHz filters by compacting the entire filter onto a substrate with dimensions 0.5 cm × 1 cm. By adjusting the relative spacing among the resonators to establish adequate couplings, filters with very sharp rejection skirt and extremely small insertion loss in passband were obtained.
Keywords :
barium compounds; high-temperature superconductors; microwave filters; superconducting filters; superconducting thin films; yttrium compounds; 3 GHz; HTS thin films; LaAlO3; YBa2Cu3O7; compact miniaturized hairpin resonators; couplings; cross-coupled planar microwave filters; hairpin resonator geometry; high-temperature superconductors; insertion loss; passband; pulsed laser deposition; single crystal substrate; superconducting thin films; Geometrical optics; Insertion loss; Masers; Microwave filters; Optical pulses; Passband; Pulsed laser deposition; Resonator filters; Superconducting filters; Superconducting thin films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.824324
