“交叉眼”干扰在单脉冲雷达中表现特征分析

“交叉眼”干扰技术被认为是最具发展前景的现代电子防卫手段之一。为开展其对抗技术研究，对单脉冲雷达在“交叉眼”干扰环境下的和、差接收信号进行了数学建模，并通过仿真计算分析了和、差接收信号所表现出的特征。初步分析结果表明：“交叉眼”干扰会导致单脉冲雷达差接收波束方向图发生畸变。畸变的严重性主要取决于干扰源和单脉冲雷达间的距离以及两干扰点源输出信号功率之比；“交叉眼”干扰同样会导致差、和接收信号功率之比出现异常。干扰源与单脉冲雷达间的距离越小和（或）“交叉眼”干扰的诱偏能力越强，差、和接收信号功率之比出现异常的角度范围越大。

Characteristic analysis of cross-eye jamming of monopulse radar signals

Cross‐eye jamming is supposed to be one of the most prospective ECM technologies for self‐protection against monopulse tracking systems .In order to develop anti‐cross‐eye jamming techniques ,the mathematics model of the received sum and difference monopulse radar signals under conditions of cross‐eye jamming is presented ,and then s the characteristics of these received signals are analyzed by simulations .Pre‐liminary results show that cross‐eye jamming causes distortion of difference beam pattern of the monopulse radar .The magnitude of distortion depends mainly on the distance between the monopulse radar and the jamming sources ,and on the output power ratio of two cross‐eye sources .Cross‐eye jamming also causes ab‐normality of power ratio of the difference signal to the sum signal . The shorter the distance between the monopulse radar and the jamming sources and (or ) the stronger the angle deception ability of cross‐eye jamming ,the wider the angle range in which the power of the difference signal is greater than that of the sum sig nal .