Frequency Dependence Effective Refractive Index of Meta–Materials by Effective Medium Theory

In this present communication we studied the frequency dependenceof the effective electromagnetic parameters of left-handed and relatedmeta-materials (NIMs) of the split ring resonator (SRR) and wire type.By varying the width of inserted material as well as the host material,we also calculate the effective parameters of NIM like effectivepermittivity and effective permeability. Using these parameters, wecalculate the effective refractive index and impedance of theconsidered medium. Our results reveal that the negative index ofmaterials can be achieved when the thickness of the host materialsshould equal to the thickness of the inserted materials.