A U-band Left-handed Metamaterial Based on Two-layered SRR Structure

A U-band left-handed metamaterial is designed and simulated to obtain the scattering parameters after the dimensions are estimated according to the transimission line theory of the left-handed metamaterial.Furthermore,the properties of transmission and the negative electromagnetic parameters are analyzed after effective permittivity;effective permeability and refraction index are calculated by the Smith parameter retrieval method.The results show that the proposed left-handed metamaterial structure behaviours the negative refraction characteristic while the real parts of effective permittivity and effective permeability are both negative in 48.8~59.9 GHz band.Thus,the existence of the left-handed metamaterial in U-band is demonstrated,and it is of great reference significance to research on metamaterials in higher band.