A Dual Mode BPF with Improved Spurious Response Using DGS Cells Embedded on the Ground Plane of CPW

Min-Hang WENG; Chang-Sin YE; Cheng-Yuan HUNG; Chun-Yueh HUANG

doi:10.1093/ietele/e91-c.2.224

Regular Section

A Dual Mode BPF with Improved Spurious Response Using DGS Cells Embedded on the Ground Plane of CPW

Min-Hang WENG, Chang-Sin YE, Cheng-Yuan HUNG, Chun-Yueh HUANG

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Keywords: bandpass filter (BPF), coplanar-waveguide (CPW), dual-mode resonator, rejection, spurious response, defected ground structure (DGS)

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2008 Volume E91.C Issue 2 Pages 224-227

DOI https://doi.org/10.1093/ietele/e91-c.2.224

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Abstract

A novel dual mode bandpass filter (BPF) with improved spurious response is presented in this letter. To obtain low insertion loss, the coupling structure using the dual mode resonator and the feeding scheme using coplanar-waveguide (CPW) are constructed on the two sides of a dielectric substrate. A defected ground structure (DGS) is designed on the ground plane of the CPW to achieve the goal of spurious suppression of the filter. The filter has been investigated numerically and experimentally. Measured results show a good agreement with the simulated analysis.

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