A compact triangular SRR loaded CPW line and its use in highly selective wideband bandpass filter for WiMAX communication system

In this paper we purpose a triangular split ring resonator (TSRR) loaded with co-planar waveguide (CPW) line for realizing a planar band-pass filter for miniaturization and high data rate WiMAX communication system. It consists of a 50Ω CPW line with triangular resonator etched on backside of substrate, parallel to the CPW. Because of negative permeability offered by the SRR and series capacitance this structure exhibits backward wave propagation in the vicinity of its resonant frequency. Due to the strong inductive coupling between resonator and line and periodically loading the line with narrow wires, resulting high selectivity with low insertion loss in the wide band-pass characteristic.