垂直入射条件下厚金属环结构的负磁导率与左手材料行为  

The thick ring resonators to achieve negative permeability andits left-handed behavior in perpendicular propagation

作　　者：刘亚红[1] 宋娟[1] 罗春荣[1] 付全红[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,西安710072

出　　处：《物理学报》2008年第2期934-939,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50632030);国家重点基础研究发展计划(批准号:2004CB719805);航空基金;国防基础研究资助的课题.~~

摘　　要：用矩形波导法实验研究了微波垂直入射于具有一定厚度的金属铜圆环结构的微波电磁响应行为.结果表明,当金属铜环的厚度增加到一定值时,在中心频率为14·5GHz处出现透射禁带,并且相位在透射禁带处发生跃变.采用双各向异性媒质理论计算了铜圆环结构的磁导率随频率变化关系,在透射禁带处磁导率为负.对厚金属圆环与金属线一一对应组合的样品,微波沿环面垂直入射时测量到左手透射通带和相位超前,通带带宽达到1·5GHz,强度为-21dB.We experimentally investigated the microwave transmittance properties of the thick ring resonators in a rectangular waveguide for propagation perpendicular to the plane of the ring resonators. Our ring resonators are different from the conventional split ring resonators which have the certain thickness. It is found that a transmission dip occurs at ld. 5 GHz and the transmission phase has a shift at the resonance frequency for the thick ring resonators. Furthermore, we calculated the permeability of the thick ring resonators applying bianisotropic composite modeling and found the negative permeability near the resonance transmission dip. We measured the left-handed peak and phase advance by using the thick ring resonators combined with wires which have transmission pass bandwidth of 1.5 GHz and transmission value of -21 dB.

关 键 词：负磁导率 垂直入射 厚金属环结构 左手材料行为 矩形波导法 

分 类 号：O441.6[理学—电磁学]