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Stopband improvement of a dual-mode ring bandpass filter using DGS

✍ Scribed by Min Hung Weng; Hung Wei Wu

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
113 KB
Volume
44
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This paper presents the improved stopband of a novel dual‐mode bandpass filter (BPF) using an etched H‐shaped defected ground structure (DGS) at 2 GHz. The wide‐stopband characteristic results from the rejection‐band resonant characteristic of the DGS in the harmonic frequency of the dual‐mode BPF. The proposed BPF is designed and fabricated with the following frequency characteristics: central frequency f~0~ = 2 GHz, 3‐dB bandwidth of 3%, and wide stopband from 2.5 to 5 GHz at −40 dB. The measured results of the fabricated filter show good agreement with the simulation results. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 44: 247–249, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20600

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