磁化等离子体对电磁波反射系数的计算分析

为了从理论上分析磁化等离子体对飞行器隐身的机理,采用等效输入阻抗方法计算金属平板前非均匀磁化等离子体层对垂直入射电磁波的功率反射系数,结果表明:电子数密度大小、入射波频率、等离子体碰撞频率和外磁场是功率反射系数的主要影响因素.电子数密度、等离子体碰撞频率取值必须合适,外加磁场才能明显降低等离子体对入射电磁波的功率反射系数.

Computation and Analysis of the Reflectance of Magnetized Plasma to Electromagnetic Wave

In order to study the mechanism of plasma cloak for craft,the total wave energy reflectance of the interface between magnetized plasma before conductor plate and atmosphere or vacuum can be calculated by applying the equivalent input impedance method.The study result is that reflection characteristics can be affected by electron numerical density,incidence wave frequency,collision frequency of plasma and magnetic intensity.Magnetic field will reduce wave energy reflectance obviously only when the electron numerical density and collision frequency of plasma are at appropriate value.