曲线合成孔径雷达最佳孔径研究(英文)

Research on Opti mal Aperture for Curvilinear SAR

基于曲线合成孔径雷达原理与空间几何关系,讨论了曲线合成孔径雷达信号模型与成像方法,推导出目标的一维信号模型、二维信号模型,并将其扩展到了三维信号模型。考虑到不同的曲线孔径形状将对方位分辨率和高度分辨率有不同影响,详细研究了各种不同形状的曲线孔径,分析和对比了各种形状的孔径,给出了各自的优缺点和适用条件。结论是上下、左右对称的孔径形状较不对称的效果更优,L型孔径将导致很高的旁瓣。仿真实验可以对真实飞行航迹起指导作用。

Based on theory and space geometry relation of Curvilinear Synthetic Aperture Radar, the paper discussed signal model and imaging method for Curvilinear Synthetic Aperture Radar. The 1-D signal model and 2-D signal model for the target were deduced, And the 3-D signal model was also deduced as extension. Because different curvilinear aperture shape would influence the azimuth resolution and height resolution differently, the paper studied all kinds of curvillnear aperture shape in detail. The aperture shape was analyzed and compared. The merit, defect and working condition for each were given out, The conclusion is symmetric aperture shape from up to down, or from left to right can get better effect than asymmetric ones. L-shape aperture will cause high side-lobe. The simulation experiment can direct real flight path.