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A triple-mode bandpass filter using a modified circular patch resonator

✍ Scribed by Ariana L. C. Serrano; Fatima Salete Correra

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
323 KB
Volume
51
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article presents a triple‐mode bandpass filter using a modified circular patch resonator. Etched slots in the resonator split the TM degenerate fundamental modes and also perturb the TM mode, approximating their resonant frequencies to form a third‐order bandpass filter. A 2.42 GHz centered filter was designed and fabricated. Experimental results showed a fractional bandwidth of 29%, return loss better than 16 dB, insertion loss of 0.5 dB, and good second harmonic band rejection. The filter exhibited a size reduction of 51% compared with a filter using an unperturbed circular patch resonator at the same frequency. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 178–182, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23950

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