非正弦波SAR的方位向分辨力

Research on the Cross-Range Resolution of Synthetic- Aperture Radar Based on Nonsinusoidal Waves

为研究非正弦波SAR的方位向分辨力 ,从波束形成的角度分析了非正弦波SAR的方位向聚焦原理 ,导出了基于矩形脉冲和高斯脉冲的合成孔径天线阵列方向图表达式 ,并与常规窄带SAR进行比较 ,指出影响非正弦波SAR方位向分辨力的主要因素为合成孔径长度和信号带宽 ,而与信号载频无关。

From the angle of a beam forming, the cross range focusing principle of the synthetic aperture radar based on nonsinusoidal waves is studied. The expressions of antenna pattern for both rectangular signal and Gaussian signal are presented. Compared with the conventional narrow bandwidth SAR whose cross rang resolution is determined by the carrier frequency, the cross range resolution of the nonsinusoidal SAR is affected by the signal bandwidth.