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Compact wide stopband low-pass filter using rectangular patch compact microstrip resonant cell and defected ground structure

✍ Scribed by Santanu Dwari; Subrata Sanyal

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

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✦ Synopsis

Abstract

A new compact microstrip low‐pass filter (LPF) is presented using a novel rectangular patch compact microstrip resonant cell (RPCMRC) and square‐head defected ground structure (DGS). It exhibits wide, high stopband, and sharp rejection. A demonstration LPF having 3 dB cutoff frequency of 2.65 GHz was fabricated and measured. Measured rejection is better than 20 dB from 2.8 to 16 GHz. Electrical length of the filter is less than 20% of the guided wavelength at 3 dB cutoff frequency. Measured passband to stopband attenuation slope is more than 56 dB/GHz. Good match between experimental and simulated results are obtained. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 798–800, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22259

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