单频电磁辐射对雷达的干扰规律

为了提高雷达电磁防护能力,揭示单频电磁辐射对雷达的干扰规律,首先基于雷达测距原理,通过电路非线性失真分析,初步掌握阻塞干扰和假目标干扰规律;而后开展效应试验,对干扰规律进行补充和完善。结果表明带内单频电磁辐射易对受试雷达造成干扰,假目标临界干扰场强明显低于阻塞干扰,最敏感处的差值可达30 dB,但敏感带宽要比阻塞干扰窄50%。随着干扰场强提高,回波峰值电平压缩量先缓慢增加而后近似线性增长,阻塞干扰虽然不会影响探测距离的准确度,但会导致探测距离缩短;假目标出现的位置是随机的,随着干扰场强提高,假目标电平先线性增长,而后趋于恒定。

Interference laws of single frequency electromagnetic radiation to radar

In order to improve the electromagnetic protection ability of radar and reveal the interference laws of single frequency electromagnetic radiation to radar,based on the principle of radar ranging,the blocking interference and false target interference laws are preliminary grasped through the analysis of nonlinear distortion for circuit firstly,and then the effect test is carried out to supplement and perfect the interference law.The results show that the single frequency electromagnetic radiation in the band is easy to interfere with the radar under test,and the critical interference field strength of the false target is significantly lower than that of the blocking interference,and the difference of the most sensitive part can reach 30 dB,but the sensitive bandwidth is 50%narrower than that of blocking interference.With the increase of interference field strength,the peak level compression of echo increases slowly first and then approximately linearly.Blocking interference will not affect the accuracy of detection distance,but will shorten the detection distance.The false target position is random.With the increase of interference field strength,the false target level first increases linearly and then gradually becomes constant.