导弹目标单、双基地雷达散射截面对比分析

Comparison analysis of mono-static and bi-static radar cross sections for missile target

目标单、双基地雷达散射截面(RCS)反映了目标是否容易被单、双基地雷达检测到。目前缺乏单、双基地RCS对比的量化指标。首先定义了双基地RCS相对于单基地RCS的RCS增强因子和RCS增强率,然后应用该定义统计分析了某隐身目标和非隐身目标双基地RCS计算结果。结果显示:对隐身目标,RCS增强因子大,RCS增强率高,对于非隐身目标,其RCS增强因子显著下降,RCS增强率不高。结合指标含义,应用双基地RCS有助于隐身目标检测,而对非隐身目标效果并不明显,这与雷达界认识相一致。这也说明,应用上述两个指标进行单、双基地RCS对比分析是有效的。此外根据隐身目标在较窄双基地角范围内的双基地RCS分析结果,应用双基地角20°~40°范围内的双基地RCS即可提高对隐身目标的检测效果。

Mono-static and bi-static radar cross sections（RCS）of target reflect that whether the target could be separately detected by mono-static and bi-static radars easily.Currently,there is no quantitative index for comparison between mono-static and bi-static RCS.In this paper,definitions of RCS enhancement factor and RCS enhancement ratio of bi-static RCS relative to mono-static are given at first.Then,the two definitions are applied to analyze bi-static RCS of some stealth target and non-stealth target.The result shows that,the RCS enhancement factor is big and RCS enhancement ratio is high for stealth target,but the factor is small and the ratio is low for non-stealth target.Combined with meaning of the two indexes,it can be found that,utilization of bi-static RCS is helpful for detection of stealth target,but this effect is not obvious for non-stealth target,which is consistent with the understanding of the radar community.This also shows that the application of the above two indexes in comparison analysis between mono-static RCS and bi-static RCS is effective.In addition,according to the analysis result of bi-static RCS in narrow bi-static angle for stealth target,the detection effect can be improved when bi-static RCS in bi-static angle range from 20°to 40°is used.