介电常数色散的异向介质天线  

Metamaterial Antenna Based on Anisotropic Permittivity

作　　者：孙永志[1] 冉立新[1] 王伟光[1] 陈秋林[1] 朱伟强[1] 

机构地区：[1]中国航天科工集团8511研究所,南京210007

出　　处：《应用科学学报》2010年第4期413-416,共4页Journal of Applied Sciences

基　　金：国家自然科学基金(60531020);国家"863"高技术研究发展计划基金(2007AA701)助

摘　　要：推导出空间色散异向介质的色散特性方程,利用该材料其中一个方向的介电常数在某特定频率附近为零的特性来制作高指向性天线.研制了一种交叉金属条结构的异向介质,对放置于这种异向介质中的全向偶极天线进行了仿真,辐射场经过此异向介质与空气的交界面后,在自由空间中集中于异向介质与空气界面的法线方向上、频率为11.5GHz时实现了高指向性,其半功率波束宽度为5°,增益为17.68 dB.仿真结果与实验结果吻合.We present an equation of dispersion characteristics for anisotropic metamaterial in this paper. In a particular direction,the dielectric constant of the material is zero at certain frequency.This property is used to produce the high-directional antenna.We develop a new metamaterial with a metallic cross-sectional structure,and simulate the radiated field of an omni-directional dipole antenna placed in the metamaterial. The radiated field is concentrated around the normal to the interface between the metamaterial and the air so that to give highly directional radiation.The gain of the antenna is 17.68 dB at 11.5 GHz,and the half power beam width is 5 degrees.The experimental results are consistent with the simulation.

关 键 词：各向异性异向介质 色散特性 高指向天线 

分 类 号：TN82[电子电信—信息与通信工程]