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A compact U-shaped defected ground structure microstrip low-pass filter with wideband rejection

✍ Scribed by Kuan Deng; Wenjie Feng; Wenquan Che

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
189 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A compact triple U‐shaped slots etched on the microstrip ground are used to implement a novel low‐pass filter.A rectangular open stub and a radius stub are used to produce transmission zeros and thus result in wide stopband. Good low‐pass performance and wide stopband characteristics can be achieved by this new structure. One prototype is fabricated to demonstrate the validity of the design strategies. The simulated and measured results indicate that the insertion loss is less than 0.25 dB and the return loss is less than −16.7 dB in the whole passband. In addition, significant improvement on rejection band can be observed; the stopband bandwidth better than −25 dB is about 105% (from 2.6 to 8.4 GHz). © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 497–499, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24960

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