涂覆吸波材料对飞行器散射截面的影响

THE EFFECT OF COATED ABSORBENT MATERIALS ON RADAR CROSS SECTION OF VEHICLES

有耗雷达目标的电磁散射缩比测量是飞行器隐身、反隐身技术发展过程中不可缺少的组成部分。根据量纲分析原理,提出了关于有耗雷达目标表面阻抗的相似准则关系式。应用这个简便的关系式,可从采用不同吸波材料的两次模型实测值来推断原型目标的雷达散射截面。

Electromagnetic scattering scale-measurement to lossy targets is an unavoidable step in the development of stealthy and anti-stealthy technology. Drawing on the experience of the principle of similitude in hydrodynamics, the formula of similitude-criterion concerning the surface impedance of target is proposed in this paper. By means of this simple formula, the RCS of prototype can be deduced by the measured values of two modelling targets coated with different kind of absorbent materials.