一种新型人工异向介质结构的设计和仿真  

Design and simulation of new type left-handed metamaterial structure

作　　者：皇甫江涛[1] 冉立新[1] 陈抗生[1] 

机构地区：[1]浙江大学信息与电子工程学系

出　　处：《浙江大学学报（工学版）》2005年第4期584-587,共4页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(60371010).

摘　　要：根据异向介质可以由具有等效负磁导率的开路环形谐振器阵列和具有等效负介电常数的细金属导线阵列构成的基本原理,提出了一种新型的、相互对等嵌入的开路环形谐振器的结构.与传统的开路环谐振器相比,新结构中内环和外环相互对称,具有更好的电流分布形态和电磁特性.采用这种新型开路环形谐振器阵列和细金属导线阵列组合,得到了一种新型的人工异向介质,并同时给出了完整的设计和仿真过程.通过对上述介质的功率传输特性和“负”Snell折射特性的仿真,表明该结构在特定的频段内表现出了明显的“异向”性质.Based on the basic principle that left-handed material can be a combination of periodically arranged split-ring resonators and thin metallic rods which having negative effective permeability and negative effective permittivity respectively, a new split-ring resonator with symmetric structure was proposed. Compared to the original characteristics, the new structure has two symmetric rings with more uniformly distributed current and better electromagnetic properties. A new left-handed metamaterial was then fabricated with such split-ring resonators array and thin metallic rods arrays, and a detailed description of the design and simulation procedure was given simultaneously. Simulation of the power transmission and the negative Snell refraction properties show that the metamaterial exhibits obvious left-handed behavior in a specific frequency range.

关 键 词：异向介质 负折射率 负磁导率 

分 类 号：TM154.4[电气工程—电工理论与新技术] O411.3[理学—理论物理]