频控阵雷达对雷达侦察测向的欺骗机理研究

Research on the Deception Mechanism of Frequency Diverse Array Radar in Radar Reconnaissance and Direction Finding

对地攻击任务中需要根据事先获得的威胁源情报数据借助战术任务规划系统制定打击计划并下发给攻击机。无源雷达侦察测向系统通过对接收信号进行处理,可以解算出威胁源位置信息并提供给任务规划系统。当敌方雷达为频控阵体制而非相控阵体制时,由于频控阵雷达波束的弯曲特性,会对无源测向系统产生欺骗。本文在分析频控阵雷达基本结构的基础上,对比相控阵与频控阵等相位面特性,以干涉仪测向系统为例研究频控阵雷达对比相法测向的欺骗效果。几种非线性FDA阵列的欺骗仿真结果表明,log-FDA的虚拟发射机交点坐标偏离量大于sin-FDA。当干涉仪x轴坐标x_(G)=300 km时,虚拟发射机交点坐标随着干涉仪y轴坐标y_(G)的增加而逐渐逼近FDA阵列实际位置,交点偏移量log-FDA>sin-FDA>reciprocal-FDA。

In the ground attack mission,the attack plan needs to be formulated and distributed to the attack aircraft based on the threat source intelligence data obtained in advance with the help of the tactical mission planning system.The passive radar reconnaissance and direction finding system can calculate the location information of threat sources and provide it to the task planning system by processing the received signal.When the enemy radar is a frequency diverse array system rather than a phased array system,the bending characteristics of the beam of the frequency diverse array radar can deceive the passive direction finding system.On the basis of analyzing the basic structure of frequency diverse array radar,this article compares the phase plane characteristics of phased array and frequency diverse array,and takes the interferometer direction finding system as an example to study the deception effect of frequency diverse array radar compared to phase method direction finding.The deception simulation results of several nonlinear FDA arrays show that the virtual transmitter intersection coordinate deviation of log-FDA is greater than that of sin-FDA.When the x-axis coordinate of the interferometer is x_(G)=300 km,the virtual transmitter intersection coordinates gradually approach the actual position of the FDA array as the y-axis coordinate of the interferometer increases.The intersection offset is log-FDA>sin-FDA>reciprocal-FDA.