Parameter extraction for symmetric coupled-resonator filters

Heng-Tung Hsu*, Zhenyu Zhang, Kawthar A. Zaki, Ali E. Atia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


A new parameter-extraction procedure for symmetric coupled-resonator filters is presented. Closed-form recursive formulas are derived for the synthesis of all the filter parameters (resonant frequencies of the individual resonators and couplings between resonators) from known measured or simulated zeros and poles of input impedance functions of the singly terminated even- and odd-mode networks. Capable of accurately predicting the unavoidable spurious couplings between nearby resonators, this simple and straightforward procedure can eliminate complicated optimization routines and have extensive applications in design and tuning of filters.

Original languageEnglish
Pages (from-to)2971-2978
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
StatePublished - 1 Dec 2002


  • Coupled resonator
  • Filter

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