一种基于旋转角反射器的双基地前视SAR干扰方法

收发分离的双基地前视SAR侦察范围广、隐蔽性强,有源干扰实施困难。针对该问题,将旋转角反射器用于双基地前视SAR干扰,建立了旋转角反射器的回波信号模型,利用级数反演法推导了成像结果。分析可知,单个旋转角反射器由于旋转运动对SAR回波的多普勒调制,在方位向上形成条带状干扰点阵。为了形成面状干扰,有效遮蔽重点区域,提出了三角形布阵方法。仿真结果表明,三角形布阵的旋转角反射器可在双基地前视SAR图像中形成大片遮挡,且能够干扰不同构型的双基地前视SAR。

A Jamming Method to Bistatic Forward-looking SAR Based on Rotating Angular Reflector

Bistatic forward-looking synthetic aperture radar (SAR) with separated transmitter and receiver has wide scope of reconnaissance and well hidden ability,thus active jamming methods can hardly work on it.For this problem,rotating angular reflector is applied on bistatic forward-looking SAR jamming.Firstly,the echo model of rotating angular reflector is built,and its imaging result is derived through series reversion method.Then it is known through analysis that single rotating angle reflector forms jamming-dot strips along azimuth,because of micro-Doppler modulation.In order to form plane jamming and effectively cover key areas,a triangular array method is proposed.Simulation results show that the rotating angle reflector with triangular array can form large occlusion in bistatic forward-looking SAR images,and can interfere with bistatic forward-looking SAR with different configurations.