针对低空多径效应导致角跟踪误差的问题,分析了弹目相对运动情况下的多径几何关系,建立了雷达导引头单脉冲角跟踪误差模型,提出了采用窗函数降低天线和差波束旁瓣,采用频率分集技术处理接收信号的方法,仿真分析了角跟踪误差与弹目距离、擦地角之间的关系,结果表明,导弹以布鲁斯特角飞向目标,综合利用低旁瓣和频率分集处理导引头信号,能够有效降低多径效应对角跟踪误差的影响。该分析能为雷达导引头提高角跟踪精度提供参考和帮助。

In view of angle tracking error caused by low-altitude multipath effects, low-level multipath geometry of missile-target relative motion was analyzed, a model of mono-pulse radar seeker angle tracking error was established, the method of window function was proposed to reduce the different and the sum beam side lobes of antenna, frequency diversity was used to deal with reception signal, the relationship between angle tracking error, missile-target distance and grazing angle was simulated. The result shows that the missile flies to target with Brewster angle, using the low side lobe and frequency diversity to deal with seeker signal, can effectively reduce the impact of multipath effects on the angle tracking error. This analysis can provide reference and help for improving radar seeker angle tracking accuracy.