Design of cross-coupled quarter-wave SIR filters with plural transmission zeros

Ching Luh Hsu*, Jen Tsai Kuo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

A cross-coupled bandpass filter is designed with quarter-wave stepped-impedance resonators (SIRs) on a single circuit plane. The entire circuit has not only a compact area since half-sized SIRs are used, but also a wide upper stopband because the first spurious peak occurs at a frequency much higher than the passband. Plural transmission zeros on both sides of the passband can be realized by non-adjacent couplings and tapped input/output. Two-port Z-parameters are employed to formulate the analysis of the transmission zeros. An experimental filter is fabricated and measured to validate the design.

Original languageEnglish
Article number4015138
Pages (from-to)1205-1208
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
DOIs
StatePublished - 2006
Externally publishedYes
Event2006 IEEE MTT-S International Microwave Symposium Digest - San Francisco, CA, United States
Duration: 11 06 200616 06 2006

Keywords

  • Bandpass filter
  • Combline filter
  • Cross-coupled stepped-impedance resonator (SIR)
  • Transmission zero

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