TEM喇叭天线阵列辐射特性研究  

Transient Radiation Analysis of TEM-horn Arrays

作　　者：廖勇[1] 孟凡宝[1] 周海京[2] 杨周炳[1] 马弘舸[1] 李科[1] 谢平[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900 [2]北京应用物理与计算数学研究所,北京100088

出　　处：《绵阳师范学院学报》2003年第2期45-49,共5页Journal of Mianyang Teachers＇ College

摘　　要：应用FDTD方法分析TEM喇叭天线阵列的瞬态辐射特性 ,分析了阵列单元之间的互耦对天线阵列远场辐射的影响。TEM喇叭天线阵列单元沿E面叠状排列可以改善阵列的低频辐射。原理上阵元越多 ,天线阵列的增益越高 ,而线性阵列只压缩一个面的方向图。改变阵列单元间馈入信号的时延 ,可以实现阵列方向图主瓣方向的偏移。用半TEM喇叭天线组成槽状排列二元线阵和四元线阵 ,进行了相应的原理性实验 ,实验结果与理论数值模拟基本一致。In this paper, the radiation of transverse electron-magnetic (TEM) born antenna arrays is analyzed by FDTD method. The mutual coupling influence between the elements to far-field radiation is analyzed. The radiation performance at lower frequencies can be improved by the stacked TEM-horn configuration. Increasing the number of arrays can compress the pattern of plane in which the arrays lie and increase the gain of arrays. The beam radiated from a transient array could be steered by properly timing input signals which fed to individual elements. Experiments of TEM-horn array verified the result of FDTD simulation.

关 键 词：TEM喇叭天线阵列 瞬态辐射特性 FDTD 信号 时域有限差分 

分 类 号：TN820.1[电子电信—信息与通信工程]