【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。更多还原

【Abstract】 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.更多还原