包含等离子体覆盖层的金属方柱RCS分析

Analysis on Radar Cross Section of Conducting Cube Scattering Covered with Plasma

应用(FD)2TD数值方法对等离子体的电磁波反射系数和相位进行研究,并与解析解进行比较,证明该方法的正确性。同时应用该数值方法计算了尺寸为入射波长2.0倍的金属方柱的雷达散射截面(RCS),其结果与矩量法进行了比较,接着计算了在金属方柱表面覆盖等离子体厚度分别为入射波长的0.5、1.0、和2.0倍3种情况下的RCS。结果表明:金属方柱的等离子体覆盖层可以有效地减小雷达目标的RCS,这一结论可以应用于航空飞行器的隐身技术中。

A frequency-dependent finite-difference time-domain （（FD）^2TD） algorithm is applied to study the electromagnetic wave reflection coefficient and phase of plasma. The numerical result is compared with analytical solution. As a result, the （FD）^2TD algorithm is verified. A radar cross section （RCS） of conducting cube with the size of 2.0 of incidence wavelength is calculated. The numerical result is also validated by comparing with the data obtained with moment of method, The RCS of conducting cube covered with plasma with thickness of 0.5,1.0 and 2.0 of incidence wavelength is calculated. The results show that the RCS of the perfectly conducting cube scatterer covered with plasma decreases. This technology can be used in aircraft stealthy.