波束赋形是改善星载合成孔径雷达（SAR）距离模糊的有力选择之一。从天线波束赋形角度出发，提出一种均匀直线天线阵的算法，将二次功率约束转化为线性场强约束，能够快速的改善天线的旁瓣特性，在模糊带区域形成局部低副瓣，从而有效的抑制星载合成孔径雷达的距离模糊。

An iterative algorithm was proposed in this paper which can be used to improve range ambiguity for spaceborne SAR. To optimize patterns quickly, second-order restrictions which refer to power side lobe are converted to linear restrictions in relation with electric field. Local lower side lobes are formed in ambiguous regions which suppress range ambiguity in SAR effectively.