Analysis of Composite Right/Left-handed Coplanar Waveguide Zeroth-order Resonators with Application to a Band-pass Filter

摘要

Design and performance of a coplanar waveguide (CPW) bandpass filter (BPF) using Composite Right/Left-handed (CRLH) Zeroth-order Resonators have been studied. The Bloch analysis is applied based on the S parameters to derive the characteristics of the eigenmodes (Bloch modes), from which the right/left-handed frequency band and the zeroth-order resonant frequency are clearly determined. Then, the susceptance slope parameter of the resonator is extracted and the admittance (J-) inverters are introduced to synthesize a capacitively coupled CPW BPF. The measured results show that the size of the filter is greatly reduced (more than 60%) when compared to a conventional structure.