Design of dual-band bandpass filter incorporating tri-section SIRs and CPW SIRs

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

Research output: Contribution to journalArticle

Abstract

A dual-band microstrip bandpass filter (BPF) designed using half-wavelength (λ/2) tri-section microstrip steppedimpedance resonators (TSSIRs) and quarter-wavelength (λ/4) coplanar-waveguide (CPW) stepped-impedance resonators (SIRs) is presented. The center frequencies of the passbands are located at commercially practical frequencies (2.45 and 5.25 GHz) for wireless local-area network (WLAN) applications. A pair of TSSIRs in the top layer of the BPF provides a path for the 2.45 and 5.25 GHz signals, and a pair of CPW SIRs in the ground layer furnishes a path for the 5.25 GHz signal. All these resonators are coupled by microstrip feed lines. For passband selectivity improvement, a cross-coupling path is established by connecting an anti-parallelcoupled line section to the ends of the input and output feed lines to form the source-load coupling.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalJournal of Microwaves and Optoelectronics
Volume8
Issue number1
Publication statusPublished - 2009 Jun 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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