源嵌入负折射率传输线介质板的透镜成像研究  

Imaging of a negative-refractive-index transmission-line slab lens excited by an embedded source

作　　者：徐新河[1] 文光俊[1] 谢康[1] 

机构地区：[1]电子科技大学通信学院,四川成都610054

出　　处：《电波科学学报》2009年第2期238-242,248,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.60571024;No.60771046;No.60588502)

摘　　要：分析了板内无数个电流源所激励起的平面电压波与负折射率传输线媒质平板透镜的相互作用,导出了平板透镜内外的电压分布,并着重讨论了倏逝波和传播波在z方向的波矢。微波电路仿真结果表明:由于板内倏逝场的增强,在透镜两个界面附近存在很高的电压波幅度。该结果证实了源点的倏逝波幅度在像点被精确地重构,从而取得亚波长成像。最后给出了板内单个电流源产生的电压解。The plane voltage wave interaction with a negative-refractive-index transmission-line slab lens excited by infinite embedded current sources is analyzed. The voltage distribution inside and outside such slab lens is derived. In particular, the z-directed wavenumber of the evanescent voltage wave is discussed. The micro- wave-circuit simulation results presented show that there are strong voltage amplitudes near the two interfaces of the slab due to the growth of evanescent field in the slab. The results confirm that the amplitudes of evanescent voltage waves at the source are exactly reconstructed at the images, thus achieving subwavelength imaging. Finally, voltage wave solutions due to a single current source in the slab are derived for the slab lens.

关 键 词：负折射率 亚波长成像 平板透镜 加载传输线 

分 类 号：TN011[电子电信—物理电子学]