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Compact ultra-wideband bandpass filter based on novel defected ground structure and folded coupled lines

✍ Scribed by Jinchao Mou; Weihua Yu; Xin Lv

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
483 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A compact ultra‐wideband bandpass filter is presented. The proposed UWB filter consists of a couple of folded parallel lines and a low‐pass filter based on defected ground structure. Good bandpass performance and wide rejection characteristics can be achieved by this new structure. One prototype is fabricated to demonstrate the validity of the proposed strategies. The simulated and measured results indicated that the insertion loss is less than 1.5 dB between the 3.1 and 10.5 GHz with a sharp falling edge of 35 dB/GHz and its group delay is less than 0.5 ns in the pass band. The rejection is better than 20 dB from 12.5 to 25 GHz. The total size of the UWB BPF is 0.78 λ~g~ × 0.23 λ~g~ where λ~g~ is the guided wavelength at the center frequency of 7.4 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26045

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