New cross-coupled filter design using improved hairpin resonators

Sheng-Yuan Lee Sheng-Yuan, Chih Ming Tsai

Research output: Contribution to journalArticlepeer-review

258 Citations (Scopus)


Stepped-impedance resonators have been thoroughly studied in this paper. Two equations for odd- and even-mode resonance are derived from a new network model. The size and resonant frequencies of the resonator could then be designed based on these two equations. A new resonator-embedded cross-coupled filter, constructed by stepped-impedance hairpin resonators and miniaturized hairpin resonators, is presented. This new filter is very compact and has lower spurious response. A 0° feed structure, which adds two transmission zeros to the filter response, is also studied. The two zeros are so close to the passband that the selectivity and out-of-band rejection of the filter are significantly increased. The design has been verified by experiment results.

Original languageEnglish
Pages (from-to)2482-2490
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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