Design of Novel Hairpin-DGS Microstrip Bandpass and Lowpass Filters Using Coupling Matrix Method

Conference: GeMIC 2008 - German Microwave Conference
03/10/2008 - 03/12/2008 at Hamburg-Harburg, Germany

Proceedings: GeMIC 2008

Pages: 4Language: englishTyp: PDF

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Boutejdar, A.; Omar, A. (Chair of Microwave and Communication Engineering, University of Magdeburg, Germany)
Elsherbini, A. (Electronics and Communications, Faculty of Engineering, Ain Shams University, Cairo, Egypt)

In this paper, we present a novel compact hairpin DGS bandpass and lowpass microstrip filter employing two hairpin U-slots etched in the ground plane. A compact microstrip BPF employing coupled DGS resonators is designed using coupling matrix method. The designed BPF showed very wide stopband with two transmission zeros. Then 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.