Frequency Transform Synthesis Method for Cross-Coupled Resonator Bandpass Filters

X Wang, D Yingjie, Peter Gardner, Hooshang Ghafouri-Shiraz

Research output: Contribution to journalArticle

2 Citations (Scopus)


In this letter, an improved synthesis method for equal-ripple cross-coupled resonator bandpass filter is proposed based on the frequency transform method and Atia's method. In this method, the conventional lowpass prototype method is revised by replacing the low pass prototype with the frequency transform method. The detailed element extraction procedure in z-domain is given. Also the coupling matrix reduction implemented by optimization algorithm is described. This method is powerful for filter synthesis with asymmetric frequency response and complex transmission zeros. The design examples are presented and the experimental results validate its effectiveness.
Original languageEnglish
Pages (from-to)533-535
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number8
Publication statusPublished - 1 Aug 2005


  • frequency transform method
  • bandpass filter synthesis
  • cross-coupled resonator


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