基于双层金属开口环谐振器结构的U波段左手材料

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

基于左手介质的传输线理论,经过估算尺寸后设计出相应的结构并仿真得到散射参量,然后利用Smith的参量提取方法提取有效介电常量、有效磁导率和折射率,对一种双层金属开口环谐振器结构的U波段左手材料的传输特性和电磁参量特性进行分析.数值仿真结果表明,该结构在48.8～59.9GHz频带内有效介电常量和有效磁导率均为负值,同时在该频率范围内具有负折射特性,从而证实了该结构在U波段的左手特性,对左手介质在更高波段的研究具有一定的参考意义.

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.