Effect of loss and coupling on the resonance of metamaterial:An equivalent circuit approach  

作　　者：ZHANG YongGang WU JingBo LIANG LanJu ZHOU GaoChao JIN BiaoBing FENG YiJun 

机构地区：[1]Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering,Nanjing University [2]School of Electrical and Information Engineering, Anhui University of Science and Technology [3]Department of Electronic Engineering, School of Electronic Science and Engineering, Nanjing University

出　　处：《Science China(Information Sciences)》2014年第12期164-171,共8页中国科学（信息科学）（英文版）

基　　金：partially supported by the National Basic Research Program of China(Grant Nos.2011CBA00107and 2014CB339800);the National Natural Science Foundation of China(Grant Nos.60990322,61071009,61027008 and 61007034);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD);Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave

摘　　要：In this work we establish an equivalent circuit model to analyze the resonace of the metamaterial considering the loss of the unit cell and coupling effect between them. From this model, we find that metamaterial can be divided into three categories： weak, critical and strong couplings, depending on the values of the loss and coupling strength, where the different resonant properties are presented. The physical reason of the division is whether the loss in each unit cell can be offset by energy coupling from the adjunct unit cells. Full-wave electromagnetic simulations have also been carried out to verify the equivalent circuit analysis. Our circuit analysis provides a simple and effective way to understand the coupling of the metamaterial and gives guidance for the analysis and design of the metamaterial.In this work we establish an equivalent circuit model to analyze the resonace of the metamaterial considering the loss of the unit cell and coupling effect between them. From this model, we find that metamaterial can be divided into three categories： weak, critical and strong couplings, depending on the values of the loss and coupling strength, where the different resonant properties are presented. The physical reason of the division is whether the loss in each unit cell can be offset by energy coupling from the adjunct unit cells. Full-wave electromagnetic simulations have also been carried out to verify the equivalent circuit analysis. Our circuit analysis provides a simple and effective way to understand the coupling of the metamaterial and gives guidance for the analysis and design of the metamaterial.

关 键 词：METAMATERIALS equivalent circuit resonant property coupling frequency splitting 

分 类 号：TN629.1[电子电信—电路与系统]