Miniaturized 3 GHz cross-coupled planar microwave filters

Hui Kai Zeng*, Anting Hsiao, Wei Hsiu Hsu, Shao Wei Wu, Jiunn-Yuan Lin, Kaung-Hsiung Wu, Jenh-Yih Juang, Tseng Ming Uen, Yi Shun Gou, Jen Tsai Kuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Cross-coupled planar microwave filters were fabricated using YB 2Cu3O7-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.

Original languageEnglish
Pages (from-to)107-111
Number of pages5
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number1
DOIs
StatePublished - 1 Mar 2004

Keywords

  • Compact miniaturized hairpin resonators
  • High-temperature superconducting (HTS) thin films
  • Planar microwave filters

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