大型阵列天线辐射的近似分析  

Approximately Analysis of the Radiation of Large Array Antenna

作　　者：张鹏飞[1] 龚书喜[1] 徐云学[1] 刘英[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,西安710071

出　　处：《微波学报》2009年第1期46-50,共5页Journal of Microwaves

摘　　要：将散射矩阵推广到阵列天线的辐射分析当中,推导出阵列天线辐射计算基础理论公式。该公式综合考虑了天线与馈电系统的失配引起的反射、天线单元之间的互耦效应以及天线单元在阵列当中和位于自由空间的辐射特性的变化。采用算例验证了该计算公式的正确性,根据阵列单元的辐射特点和S参数特点,提出了大型阵列辐射场的近似计算方法。以此为基础采用泰勒馈电设计了副瓣电平低于-30dB的大型阵列天线。The basic theoretical calculation formula for radiation of array antenna is deduced by extending the scattering matrix to analyzing the radiation of array antenna, which takes the following factors into consideration. The first factor is the reflection arise from the mismatch between the antenna and its feeding system, and the second one is that the coupling between the cells of the array, the last one is the differences of the cell＇s radiation characters in free space from those in array. After the testifying of the formulation by an array, an approximation analyzing method for large scale array antenna is proposed according to the characters of the radiation and the S parameters of the cells in army. Finally a large scale array antenna with a side lobe less than -35dB is designed by using Taylor feed method.

关 键 词：阵列天线 辐射 低副瓣电平 

分 类 号：TN821[电子电信—信息与通信工程]