基于FFT平面相控阵天线方向图快速计算  

Fast Computation of Planar Phased Array Pattern Based on FFT

作　　者：李建新[1,2] 陈瑞[1] 

机构地区：[1]南京电子技术研究所,南京210039 [2]天线与微波技术国防科技重点实验室,南京210039

出　　处：《微波学报》2009年第6期12-17,共6页Journal of Microwaves

摘　　要：研究了二维矩形栅格平面相控阵天线方向图快速FFT计算方法,通过严格数学推导过程,揭示了平面阵列方向图与二维FFT之间内在必然联系。借助可见空间的概念,给出FFT应用详解。结合实例,验证处理方法正确性,并检验计算速度。最后,文中描述了切面方向图处理、扫描角精度分析、方向性系数计算等。The paper presented a method for fast computation of the radiation pattern of the two-dimensional planar phased array with rectangular grid, which is based on Fast Fourier Transform （FFT）. The strict mathematical derivation is given to show the intrinsic relationship between planar array pattern and two-dimensional Fb^F. In virtue of the conception of visible space, the applied technique of FFT algorithm on the fast computation of planar array pattern is demonstrated. Meanwhile, examples are given to validate its precision and speed. At last, some details are described, such as the pattern transacting at a specific cut plane, analysis on accuracy of scanning angles, computation of directional coefficient.

关 键 词：快速傅立叶变换 平面阵列 方向图 可见空间 

分 类 号：TN821.8[电子电信—信息与通信工程]