主瓣干扰条件下双极化单脉冲角度估计方法

Angle estimation method of dual polarized monopulse radar with mainlobe interference

主瓣干扰是在雷达照射波束内制造一个与目标位置不同的射频掩护干扰,破坏单脉冲天线口面的相位波前,使雷达不能给出正确的角度指示。提出一种双极化单脉冲雷达的目标角度估计方法,将雷达接收天线改为双极化接收,并增加相应的和差网络,可以在数字域形成6路处理通道,通过估计干扰的极化特性,消除干扰信号对目标角度的耦合误差,估计出目标的真实角度,维持单脉冲雷达正常的测角和跟踪,为对抗主瓣干扰提供了一种简单而有效,且非常易于工程实现的方法。

The main lobe jamming produces a radio frequency shield interference which is different from the target position in the radar irradiation beam, and destroys the phase wave front of the mono pulse antenna sur- face, so that the radar can not give the correct angle indication. A target angle estimates method for dual po- larization monopulse radar is put forward. The radar receiving antenna for dual polarization receiver, and a corresponding increase in the sum and difference network, can form six channels in the digital domain. After polarization characteristics of interference estimation, the coupling error of interference signal is eliminated, the true the angle of the target is estimated, and the normal monopulse radar angle measurement and tracking is maintained. It provides a simple and effective method to counter the mainlobe interference, and it＇s easy to realize in engineering.