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Parallel-coupled bandpass filters with broad rejection band using interdigital fingers and DGS

✍ Scribed by Man-Long Her; Wen Ko; Ming-Wei Hsu; Yu-Lin Wang; Chou-Jung Hsu

Publisher: John Wiley and Sons
Year: 2006
Tongue: English
Weight: 88 KB
Volume: 48
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.21449

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✦ Synopsis

Abstract

A novel parallel‐coupled bandpass filter (PC‐BPF) with a fundamental frequency of 2.4 GHz is presented in this paper. This proposed filter achieves a broad rejection bandwidth and a sufficient attenuation level by using the distributed interdigital fingers to attenuate the spurious even harmonics of 2f~0~ and 4f~0~, and employing a defected ground structure (DGS) resonator to suppress the 3f~0~ spurious response. The measured results show a satisfactory rejection bandwidth of 8.6 GHz with a rejection level of −30 dB at 2f~0~. The improved performance will be very attractive for application in many communication systems. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 705–707, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21449

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