对相控阵雷达副瓣的双极化干扰研究  

Study of Dual-polarization Jamming to Phased Array Radar Side-lobe

作　　者：韩昭[1] 胡东[1] 

机构地区：[1]南京电子技术研究所,江苏南京210039

出　　处：《舰船电子对抗》2017年第5期1-5,共5页Shipboard Electronic Countermeasure

摘　　要：相控阵雷达普遍采用自适应数字波束形成技术,能够有效对抗副瓣干扰。随着计算能力的提升,波束形成算法可以做到接近实时运算。这导致多点源闪烁干扰、重复噪声干扰等以往有效的方法效果也被大大削弱。自适应波束形成技术的原理是窄带条件下多个雷达天线单元接收到同一干扰机的信号高度相关。由于天线单元必然存在交叉极化分量,不同单元的交叉极化方向图有较大的幅相不一致性。基于这一点,利用一台干扰机产生2路极化不同的干扰信号,能够改变多个天线单元接收到数据的固有的相关性,从而消耗更多的雷达空域自由度。理论分析和仿真结果证明了上述结论。Phased array radars generally use adaptive digital beam-forming(ADBF)technology,which can effectively antagonize side-lobe interference.Along with the advancement of calculation capability,beam-forming algorithm can be close to the real time operation,which leads to the effect of effective methods in the past such as multi-source blinking jamming,repeat noise jamming,etc.have been greatly weakened.The principle of ADBF technology:under the condition of narrow band,the signals from the same jammer received by multiple radar antenna units are highly correlated.The cross-polarization component is inevitable in the antenna unit,and there are large differences of amplitude/phase in the cross-polarization antenna pattern of different units.Based on this,this paper uses one jammer to produce two jamming signals with different polarization mode,which can change the inherent correlation of the received data from the antenna units,thereby more spatial freedom degrees of radar are consumed.Theoretical analysis and simulation results prove the above conclusion.

关 键 词：雷达副瓣 自适应数字波束形成 双极化干扰 相控阵雷达 

分 类 号：TN972.1[电子电信—信号与信息处理]