Tri-band bandpass filter with sharp passband skirts designed using tri-section SIRs

Chung I.G. Hsu, Ching Her Lee, Yi Huan Hsieh

Research output: Contribution to journalArticle

177 Citations (Scopus)


This letter presents a second-order tri-band bandpass filter (BPF) designed using tri-section stepped-impedance resonators (TSSIRs). The impedance ratios of the TSSIRs were computed using the formulas expressed as functions of the passband center frequencies, which are located at 1.57, 2.45, and 3.5 GHz. A cross-coupled configuration was arranged to sharpen the passband skirts. The newly designed tri-band BPF was verified by circuit implementation and very good agreement between the simulated and measured results was observed.

Original languageEnglish
Pages (from-to)19-21
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number1
Publication statusPublished - 2008 Jan 1


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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