A compact cpw-fed UWB BPF using combined microstrip sir

Yu Cheng Chen, Ching Her Lee, Chung I.G. Hsu

Research output: Contribution to journalArticle

4 Citations (Scopus)


This article presents a multimode-resonator (MMR)-based ultra-wideband (UWB) bandpass filter (BPF) fed by modified coplanar waveguides (CPWs). The MMR employed in the UWB BPF is formed by combining two quarter-wavelength (λ/4) microstrip stepped-impedance resonators (SIRs) in a structure-shared fashion. The first two resonant frequencies of the inherent λ/4 SIRs and the fundamental one of the embedded half-waveiength (λ/2) resonator were designed and located inside the UWB passband. Experiments on a prototype UWB BPF were carried out for validating the filter design. The measured frequency responses show an insertion loss of less titan 1 dB between the first and the last |S11| null frequencies in the UWB passband and an upper-20-dB stopband band-width of about 6.14 GHz.

Original languageEnglish
Pages (from-to)918-921
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2009 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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