矩形阵反向交叉眼干扰建模

Interference modeling of rectangular array retrodirective cross-eye method

交叉眼是干扰单脉冲雷达最有效的方式之一,针对两点源反向交叉眼的参数容限苛刻以及作用范围的局限性等问题,引入矩形阵反向交叉眼。采用扩展性分析法推导了矩形阵反向交叉眼干扰的数学模型,得到单脉冲雷达指示角与调制参数、干扰环路布局的一般公式,并分析了调制参数与干扰环路布局对交叉眼干扰效果的影响。以最优布局因子为指导,对矩形阵不同布局方式进行了研究,并与两点源交叉眼干扰效果展开了对比。仿真结果表明:矩形阵反向交叉眼在两组干扰环路的夹角为50°时干扰效果最佳,对单脉冲雷达测角造成的角度偏移以及干扰覆盖的范围均要优于两点源反向交叉眼。

The cross- eye jamming is one of the most effective ways to interfere the monopulse radar.In order to solve the problem of the strict tolerance and the limitation of the range of the two-point source retrodirective cross-eye,the rectangular array retrodirective cross-eye jamming is introduced.The mathematical model of rectangular array retrodirective cross-eye jamming is deduced by expansibility analysis.The general formulas of the indication angle and modulation parameters of monopulse radar and the layout of jamming loops on the cross-eye jamming effect are obtained.The influence of modulation parameters and the layout of jamming loops on the cross-eye jamming effect is analyzed.With the guidance of the optimal layout factor,different layout modes of rectangular arrays are studied and compared with the two-point sources retrodirective cross-eye.The simulation results show that the rectangular array cross-eye jamming method has the best jamming effect when the angle between the two jamming loops is 50°.The angle offset and the range of interference coverage caused by the rectangular array retrodirective cross-eye jamming are better than the two-point source cross-eye jamming.