Design of a new bandpass filter using anti-parallel coupled asymmetric SIRs

Ching Her Lee, Chung I.G. Hsu, He Kai Jhuang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this paper a newly designed internally-coupled asymmetric stepped-impedance resonator (SIR) bandpass filter (BPF) is proposed. The asymmetric SIR structure not only can effectively reduce the circuit size but also can provide two flexibly tunable transmission zeros near the lower and upper passband edges. The first transmission zero is due to the series resonance of the quarter-wavelength open stepped-impedance stub, and the second one is produced by anti-parallel coupling between adjacent SIRs, The proposed BPF was fabricated and simulated using the commercial software HFSS, and agreement between the measured and simulated results was observed. A 0.9-dB insertion loss and a shape factor of 3.6 were achieved in the passband, thus indicating that the proposed filter structure is of practical value.

Original languageEnglish
Pages (from-to)571-575
Number of pages5
JournalIEICE Transactions on Electronics
VolumeE89-C
Issue number4
DOIs
Publication statusPublished - 2006 Apr

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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