Analysis of Electromagnetic Scattering of Plasma-Coated Metal Cylinder Based on FDTD

In this paper, the effects of plasma with different collision frequency, thickness and electron density distribution on RCS of metal cylinder are given by ADE-FDTD method. The results show that the RCS can be effectively reduced by increasing collision frequency and thickness, but it is very difficult for actual equipment to produce plasma with too large collision frequency and thickness. The effect of electron density distribution on RCS reduction with different bandwidth is obviously different. Therefore, under the case of moderate collision frequency and coating thickness, the electron density distribution with RCS reduction of at least 10 dB in 8–12 GHz band is obtained by genetic algorithm. This paper has reference significance for RCS reduction of plasma-coated targets with low collision frequency and coating thickness.