调频步进雷达的和差单脉冲测角

Sum-Difference Monopulse Angle Measurement for Modulated Frequency Stepped Radar

角度测量是现代雷达的基本功能之一,而和差单脉冲测角是雷达中常用的一种测角方式,该文研究了调频步进雷达的和差单脉冲测角问题。在雷达采用均匀线阵、发射频率步进线性调频相参脉冲串信号的情况下,文中推导了调频步进雷达和差单脉冲测角的角敏函数,它等于各相参脉冲对应的差波束方向图之和与和波束方向图之和的比值,借助于该角敏函数可以进行目标角度测量,最后通过仿真实例检验了测角的效果。所得结论对工程实际具有参考意义。

The angle measurement is one of the basic functions of modern radar,and the sum-difference monopulse angle measurement is a commonly used angle measurement method in the radar.The sumdifference monopulse angle measurement of the modulated frequency stepped radar is investigated in this paper.Under the condition that the radar adopts the uniform linear array and transmits the stepped frequency coherent pulse train of linear frequency modulation,the angle sensitivity function of the modulated frequency stepped radar is elaborately derived in this paper,which is equal to the ratio of the sum of difference beam patterns to the sum of sum beam patterns.With the aid of this angle sensitivity function,the target angle can be measured.Finally,a numerical simulation example is provided to verify the effect of angle measurement.The obtained conclusions have reference significance for engineering practice.