基于雷达天线方向图的压制干扰暴露区建模

Modeling on Exposed Area of Suppressing Jamming Based on Radar Antenna Beam Pattern

当前的雷达暴露区模型不够精确,需要考虑雷达天线方向图对干扰效果的影响。为实现突防策略的科学选择,引入雷达天线方向图对烧穿距离的计算方法进行改进,建立雷达天线方向图修正下的雷达暴露区模型。在对新模型进行分析的基础上,给出单部干扰机对雷达实施压制干扰时被掩护目标的突防策略,即突防方向应选择天线副瓣极大值处。针对移动雷达平台,对多部干扰机同时实施压制干扰的雷达暴露区进行仿真和分析,得到存在多部干扰机时的目标突防策略:多部干扰机相对于雷达的夹角小于一定值并且等于天线副瓣极大值对应的角度时,雷达暴露区毛刺稀疏,突防方向在很大的角度范围内都可以得到非常理想的压制干扰效果。仿真结果表明,基于新模型下的烧穿距离随角度变化关系与试验结果一致。

Current radar exposed area model is imprecise as the influnce of antenna beam pattern needs to be considered.In order to implement the optimized penetrating strategy of protected targets,the radar antenna beam pattern was introduced in calculating burn-through distance,and a new radar exposed area model modified by radar antenna beam pattern was built.On basis of analysis of the new model,the penetrating strategy of protected targets when radar is interfered by just one jammer is presented,in which the penetrating direction should be selected at radar antenna sidelobes'maximum.Radar exposed area of moving platform under suppressing jamming of multiple jammers was simulated and analyzed,and a targets penetrating strategy with multiple jammers was built.When an angle between multiple jammer and radar is less than a certain value and equal to the angles corresponding to radar antenna sidelobes'maximum,the radar exposed area has few glitches,which leads to good suppressing effect with wide scope of penetrating direction.The simulated results show that burn-through distance obtained by the proposed model varying with directions is consistent with experimental results.