摘要
介绍了仿射坐标系中傅立叶变换的基本原理。针对具有非正交的周期栅格排列的天线阵的方向图计算,描述了FFT在其中的应用以及计算步骤。以美国GBR-P雷达天线阵为例,用仿射坐标系的FFT计算其方向图。计算结果显示,该方法在保持计算精度的同时,大幅度地提高了计算效率。
The Fourier Transform in affine coordinate system is introduced in this paper.For the antenna array with non-orthogonal element arrangement,this paper shows how fast Fourier Transform(FFT) is used for pattern calculation and the calculation procedure.As an example,the pattern of GBR-P radar antenna is calculated by using affine FFT method.This example indicates the new method can provide the same precision in much less time.
出处
《微波学报》
CSCD
北大核心
2011年第2期8-12,共5页
Journal of Microwaves