Design of spur-line-loaded cross-coupled dual-band bandpass filter with wide upper-end stopband

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

Research output: Contribution to journalArticle

6 Citations (Scopus)


This article presents the design of a compact fourth-order cross-coupled dual-band bandpass filter (BPF) having a wide upper-end stopband. Quarter-wavelength (λ/4) stepped-impedance resonators (SIRs) were employed to construct the BPF to have a relatively small circuit size and high spurious harmonics, as compared with the BPF using half-wavelength (λ/2) SIRs. The resonators tapped by the input and output feeding lines were loaded by a spur-line to suppress the first spurious passband so as to further broaden the upper-end stopband. BPFs with and without the embedded spur-lines were both simulated to compare their frequency responses. Very good agreement between the simulated and measured results was observed.

Original languageEnglish
Pages (from-to)691-694
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number3
Publication statusPublished - 2008 Mar 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

Cite this