Design of compact dual-band bandpass filter using frequency transformation and its implementation with Split Ring Resonator Dual-band bandpass filter using SRR

This paper presents the design and implementation of acompact dual-band band-pass filter using metamaterial Split Ring Resonators. The coupling matrix is generated by frequency transformation technique applied to advance filtering functions for symmetric dual-band band-pass filter. The dual-band filter (2×2) pole, with return loss20 dB and bandwidth of 142 MHz and 138 MHz in two bands, at center frequencies3.14 GHz and 3.37 GHz respectively are designed, fabricated and tested. The measured and simulated results are in good agreement over the desired band. The size of the filter, which is as small as 55 mm ×55 mm ×1.27 mm, can be used for WiMAX Applications.