隐身飞机雷达目标特性初探

The Researching for the Target Characters of Stealth Aircraft

本文介绍有关美国隐身飞机 F-117A 模型雷达截面(RCS)的测试情况,讨论测试数据的处理方法,并对测试结果进行了分析。分析结果表明,F-117A 在微波波段具有良好的隐身性能,在鼻锥方向士45°范围内,其 RCS 的值都很低。但随着频率的降低,RCS 有明显增长趋势,特别是在米波波段可呈现极高的谐振点。另外,在雷达波的不同极化状态下,将出现不同的 RCS 结果。实际上,目标的极化特性与其频率特性和空间特性的联系十分密切。上述情况说明,采用米波雷达、极化自适应技术和机载预警系统进行反隐身将有良好的前景。

In this article,we introduce the information of target characters measurement for stealth plane F-117A,discuss the treatment methods of measurement data and analysis the results.We can see from the analytical results,F-117A owns good RCS characters in microwave frequency.In the range of±45 deg.to direction of plane nose,its RCS is very low.But RCS of F-117A increases obviously with the decreas- ing of frequency,especially in meter-wave band it has the highest resonant point.Also RCS results of radar wave vary in different polarization state,and the polarization characters have tight connection with frequency characters and space characters.The information referred above demonstrates that meter-wave radar and the technique of polarization adaptive system may have good future for anti-stealth.