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Defected-ground coupled microstrip lines bandpass filter with suppressed spurious resonances

✍ Scribed by Muhammad A. Salah-Eddin; Amr M. E. Safwat

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
150 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Defected‐ground coupled microstrip lines (DCL) bandpass filter is proposed. The length of the proposed filter is quarter the length of conventional coupled‐line filter and it has a wide stopband and suppressed spurious resonances up to 4f~0~, where f~0~ is the filter central frequency. Five hundred and fifty megahertz single‐section and two‐section DCL filters were designed and fabricated. Simulations and measurements show that the rejection levels of the spurious resonances at 2f~0~, 3f~0~ as well as 4f~0~ are better than −11 and −14 dB for single‐section DCL and double‐section DCL, respectively. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2038–2039, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22590

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