扫频雷达单频连续波电磁辐射阻塞效应分析

Analysis of blocking effect for single frequency continuous wave electromagnetic radiation in swept frequency radar

为掌握扫频雷达装备连续波电磁辐射下的干扰规律,揭示单频连续波电磁辐射对扫频雷达干扰的作用机理,以Ku波段扫频雷达为受试对象,通过搭建试验平台,采用全电平辐照法对其进行带内单频连续波电磁辐射试验,从而确定雷达装备电磁干扰规律。带内单频点连续波电磁辐射试验结果表明,受试雷达的回波目标电平随干扰强度的变化而变化。不同干扰频率下,雷达装备电磁干扰效应变化规律基本一致。选取6 dB压制电平为敏感判据,测试不同频率下雷达装备干扰场强阈值。试验结果表明,受试雷达带内较小的电磁辐射(干扰频差为0.14 GHz时)就能对雷达装备造成有效干扰。

In order to master the interference rule of swept frequency radar equipment under continuous wave electromagnetic radiation,to reveal the interference mechanism of single frequency continuous wave electromagnetic radiation to swept frequency radar,the Ku-band swept radar is taken as the test object,and a test platform is established,the full level irradiation method is used to carry out the electromagnetic radiation test of the single frequency continuous wave in band,to determine the electromagnetic interference rule of radar equipment.The results of the single frequency continuous wave electromagnetic radiation test in the band show that the target level of the echo for the radar under test changes with the interference intensity.Under different interference frequencies,the change law of electromagnetic interference effect of radar equipment is basically the same.The 6 dB suppression level is selected as the sensitive criterion to test the radar equipment interference threshold at different frequencies.The test results show that the small electromagnetic radiation in the radar band(interference frequency difference at 0.14 GHz)under test can cause effective interference to radar equipment.