Design of microstrip bandpass and lowpass filters using coupling matrix method and a new hairpin defected ground structure

In this work, we present a novel compact hairpin defected ground structure (DGS) bandpass and lowpass microstrip filter using two hairpin‐slots etched in the ground plane. A compact microstrip BPF using coupled DGS resonators is designed using coupling matrix method. The designed BPF showed very wid...

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Bibliographic Details
Published in:Microwave and optical technology letters 2008-11, Vol.50 (11), p.2898-2901
Main Authors: Boutejdar, Ahmed, Omar, Abbas
Format: Article
Language:English
Subjects:
bandpass filter
compensated capacitor
DGS lowpass filter
hairpin DGS
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Summary:In this work, we present a novel compact hairpin defected ground structure (DGS) bandpass and lowpass microstrip filter using two hairpin‐slots etched in the ground plane. A compact microstrip BPF using coupled DGS resonators is designed using coupling matrix method. The designed BPF showed very wide stopband with two transmission zeros. Furthermore, a simple technique to transform the designed BPF to a LPF was presented. The BPF was fabricated and measured. The measurement results showed good agreement with the theoretical and simulation results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2898–2901, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23794
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.23794