副瓣消隐技术在抑制雷达间电磁干扰中的应用

The application of sidelobe blanking technology in EMI suppression between radars

为了更好地抑制地面雷达之间的电磁干扰,通过与随队干扰的干扰样式进行对比,得出了雷达间电磁干扰信号主要通过天线副瓣耦合进入接收机的特点,并在此基础之上将副瓣消隐技术引入到抑制雷达间电磁干扰中。分析了副瓣消隐的基本原理,通过相位补偿的方法消除了传统副瓣消隐技术中的相位差问题。最后对副瓣消隐技术的抗干扰效能进行了验证。

Unlike the jamming from escort jammers,the EMI signals enter the receiver mainly via antenna sidelobe coupling,on the basis of which the sidelobe blanking technology is introduced to better suppress the EMI between ground radars.The analysis of the basic principles of the sidelobe blanking indicates that the phase difference occurring in the conventional sidelobe blanking technology can be eliminated through phase compensation.The antijamming capabilities of the sidelobe blanking technology are verified.The simulation results indicate that the antijamming improvement factor is 24.6 dB after phase compensation,which is improved by 2.7 dB compared with that before compensation,which means that the technology can suppress the interference between radars effectively.