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

Volume

14

Issue

1

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

107

Lastpage

111

Abstract

Cross-coupled planar microwave filters were fabricated using YBa₂Cu₃O_7-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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.824324

Filename

1288221