Design of a novel quad-band microstrip BPF using quarter-wavelength stepped-impedance resonators

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

Research output: Contribution to specialist publicationArticle

21 Citations (Scopus)

Abstract

In this article, a new quad-band microstrip bandpass filter (BPF) is proposed. The BPF is composed of resonators whose first four resonant frequencies can be tuned to the desired passbands. Each resonator is formed by combining two unequal-size stepped-impedance resonators (SIR) with part of their structures shared. The designed quad-band BPF is implemented on an RT/Duroid 6010 substrate. The measured fractional bandwidths (minimum insertion losses) for the 1.57 GHz (GPS), 2.45 GHz (ISM), 3.55 GHz (WiMAX) and 5.25 GHz (WLAN) bands are 6.4 percent (1.85 dB), 8.2 percent (1.4 dB), 8.7 percent (2 dB) and 12.2 percent (1.06 dB), respectively, which agree well with the simulated results. For miniaturization purposes, the resonators are meandered to give an overall circuit size of only 12.3×9.1 mm.

Original languageEnglish
Pages102-112
Number of pages11
Volume50
No.2
Specialist publicationMicrowave Journal
Publication statusPublished - 2007 Feb 1

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Bandpass filters
Resonators
Wavelength
Insertion losses
Wireless local area networks (WLAN)
Global positioning system
Natural frequencies
Bandwidth
Networks (circuits)
Substrates

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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Design of a novel quad-band microstrip BPF using quarter-wavelength stepped-impedance resonators. / Hsu, Chung I G; Lee, Ching-Her; Jhuang, He Kai.

In: Microwave Journal, Vol. 50, No. 2, 01.02.2007, p. 102-112.

Research output: Contribution to specialist publicationArticle

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