Computer-aided diagnosis and tuning of cascaded coupled resonators filters

Heng-Tung Hsu*, Hui Wen Yao, Kawthar A. Zaki, Ali E. Atia

*Corresponding author for this work

Research output: Contribution to journalArticle

47 Scopus citations


A model for the determination of the individual resonant frequencies and inter-resonator couplings of a system consisting of cascaded coupled resonators is presented. Measuring or computing the phase of the reflection coefficient of short-circuit terminated networks synthesizes all the inter-resonator couplings and resonant frequencies. The loading effect on the last resonator due to the unknown position of the short-circuit reference plane is accurately accounted for by a systematic method. A deterministic finite steps tuning method based on the model is developed. The method is proven successful experimentally and the noniterative nature of the method makes fully automatic tuning of filters possible.

Original languageEnglish
Pages (from-to)1137-1145
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number4
StatePublished - 1 Apr 2002


  • Computer-aided
  • Filters
  • Tuning

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