变极化技术抗干扰效能分析

Antijamming effectiveness analysis of changing polarization technique

针对变极化技术抗干扰的效能评估问题,以变极化技术抗单一积极干扰效能的评估方法为基础,分析了雷达探测区存在两个线性极化干扰波时变极化技术的抗干扰效能,得出了极化抗干扰得益与两干扰能量比以及极化状态点球半径夹角之间的定量关系。并进一步讨论了雷达探测区存在两个任意极化干扰波以及多个任意极化干扰波时的抗干扰评估方法。实验结果表明,变极化技术抗单一极化有源干扰得益大于20 dB,变极化技术抗复合积极干扰得益大于3 dB。

In view of the antijamming effectiveness evaluation of changing polarization technology,antijamming effectiveness is analyzed when there exist two linear polarization jamming waves in the detection area of radar,which is based on the antijamming effectiveness evaluation method of single polarization jamming.The quantitative relationship of the antijamming gain,power ratio and the included angle of the polarization state point is proposed,and the antijamming effectiveness evaluation method is discussed when there exist two or more random polarization jamming waves in the detection area of radar.A series of correlative experiment results indicate that the antijamming gain for single polarization jamming is greater than 20 dB and the antijamming gain for multiple active jamming is greater than 3 dB.