机载相控阵雷达ARM检测工作方式研究

The Researches on Working Mode of Detecting ARM inAirborne Phased Array Radar

及时发现ＡＲＭ袭击是采取各种后续抗反辐射导弹措施的前提。对ＡＲＭ告警，有两种可行的思路：一是根据ＡＲＭ与载机之间速度的差异，检测已脱离载机后高速运行的ＡＲＭ；二是根据弹机分离时刻ＡＲＭ的加速度特征，分离出强回波信号（ＡＲＭ载机回波信号）附近的弱回波信号（ＡＲＭ回波信号）。两种方法各有优缺点。本文设计的抗ＡＲＭ工作方式综合了上述两种方法的优点，通过加速度二次相位补偿后突出ＡＲＭ回波信号，然后同时在跟踪距离门和其它距离门中探测ＡＲＭ，以达到高的ＡＲＭ发现概率。

Finding the attack of ARM in time is the precondition of taking the posterior measures to antagonize the ARM. There are two possible methods to find the attack of ARM: one is to detect directly the ARM flying in high speed after it leaves the carrier according to the speed difference between the ARM and the carrier, the other is to separate the weak echo signal(ARM echo signal) form the strong echo signal(the carrier echo signal) according to the acceleration characteristic of the ARM when it′s launched by the carrier. Both methods have merits as well as demerits. In this paper, we propose an Anti-ARM working mode of airborne phased array radar that has synthesized the merits of the above-mentioned two methods. The finding probability of ARM launching can be increased by the way of making secondary phase compensation to acceleration in order to stress the ARM echo signal and then detecting the ARM in the tracking range gate and the other range gates simultaneously.