CST – Computer Simulation Technology

New CPW low-pass filter based on a slow wave structure

Title:
New CPW low-pass filter based on a slow wave structure
Author(s):
F. Martín , F. Falcone , J. Bonache , T. Lopetegi , M. A. G. Laso , M. Sorolla
Source:
Microwave and Optical Technology Letters
Vol./Issue/Date:
Volume: 38, Issue: 3, 5 August 2003
Year:
2003
Page(s):
190 - 193
Keywords:
coplanar waveguide technology, microwave filters, slow-wave structures
Abstract:
A new periodic loaded coplanar waveguide (CPW) low-pass filter with very sharp cutoff has been designed and fabricated. The device consists of a CPW structure with T-shaped periodic patterns on both the central strip and ground planes. With such a design, capacitive coupling is added between the signal strip and ground planes at periodic positions, resulting in a filtering action and slow-wave effect. In addition to a sharp cutoff, the device exhibits very low insertion loss in the pass band, wide rejection bandwidth, and simple design and fabrication
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