电磁波极化改变干扰试验效果的技术分析

Technical Analysis on Result Change of Jamming Experiment by Electromagnetic Polarization

电磁波极化是天线辐射特性的一个重要参数,通过对一次电子对抗试验中对机载接收设备干扰无效的技术分析,判断出水平极化干扰电磁波以近似零度角入射时,机载圆极化接收天线产生了一个近似于"雷达盲区"的极化响应是干扰设备对机载圆极化设备干扰效果差的根本原因,当追加圆极化罩后,干扰效果相当令人满意。

Electromagnetic polarization is an important parameter of antenna radiation. Through technical analysis of jamming failure in a countermeasure experiment of interfering to the airborne receiver,the jamming device would be ineffective to the airborne circularly polarized receiving antenna when the incident angle of the horizontal- polarized electromagnetic interfering wave is almost zero degree. The fundamental reason for this jamming ineffectiveness is that a zero polarization response similar to the radar blind space is produced by the airborne circularly polarized receiving antenna. However,the jamming performance could be greatly satisfied when a circularly polarized radome is added to the transmitting antenna,and experimental results prove the correctness of this analysis.