对称方形环结构电磁超材料的设计与仿真

摘要

Based on the principle proposed by Smith on the array of thin metallic wires and the cyclic structure of split-ring resonators (SRR) ,w hose permittivity (ε) and permeability (μ) are both nega-tive in some frequencies ,the circular structure of SRRs is modified and a new split-ring resonator with symmetric structure is proposed .Compared to the characteristics of Smith′s SRRs ,this kind of SRRs can also achieve the double negative properties in a particular range of frequency and is symmetrical a-round with a more rational pattern of electrical current distribution and better electromagnetic per-formance .%基于Smith提出的金属细线阵列与开口谐振换（SRRs）周期结构能在某一频段内实现双负特性的原理，对圆形SRRs结构进行了改进，提出了一种不相互嵌入、对称的开路谐振环结构。与Smith提出的谐振结构相比，该结构也能够实现特定频域的双负特性，且结构上下、左右都具有对称性，电流分布形态更加合理，电磁性能更加优良。