提出一种对合成孔径雷达(SAR)的干扰新方法:遮蔽区域可控的移频干扰。该方法将干扰载频在脉间步进递增或递减变化,人为产生距离向和方位向的耦合效应,同时进行方位向移频,这可在SAR成像中形成区域可控的遮蔽干扰效果。此干扰独特之处在于能够将干扰能量仅出现在需要遮盖的目标上,从而有效提高了干扰能量的利用效率。仿真实验证明了该方法用于SAR 局部干扰的正确性和有效性。

An shading area-controlled shift-frequency jamming method is presented for synthetic aperture radar (SAR). While the carrier frequency of the interference is stepped between pulse to pulse to generate the coupling effect between range and azimuth,an azimuth shift-frequency is added. The combination of them provides an area-controlled shading jamming. The unique of the jamming method is that the energy can only appear on the target that needs to be covered, so that less jamming energy is needed. Simulation results verify the analysis and its jamming effectiveness for SAR.

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国家自然科学基金资助项目(61671453);总装预研基金资助项目(5133030103)