Exploring split ring resonators for GHz applications

Split Ring Resonators (SRRs) are a class of Meta material structures, which are composed of two metallic rings that are separated by a gap and splits etched on opposite side of the rings. These structures have been successfully exploited to understand its magnetic, electric and electromagnetic properties. This paper gives (i) a systematic understanding on the resonant frequency of SRR structure which is intended to be used in the GHz range, (ii) its magnetic and electric excitation modes under two different excitation conditions, (iii) the steps involved in obtaining the Scattering Parameters of these structures using classic waveguide approach and (iv) the procedure for retrieving the effective material parameters like permeability and permittivity. Difference in resonance with respect to single SRR structure and an array of structures are also enlightened. The results are obtained from HFSS and CST and are compared. Both the results were found similar and satisfactory.