Scattering reduction of perfectly electric conductive cylinder by coating plasma and metamaterial

This paper presents the radar cross section (RCS) reduction of scattering of perfectly electric conductive (PEC) cylinder coated with plasma and metamaterial by finite-difference time-domain (FDTD) method. Two coating schemes of the cylinder were studied to find better RCS reduction performance. One is to put the plasma layer at the outside and the other is to put the metamaterial layer outside. The influence of plasma's thickness and collision frequency was studied. The calculation results show that in the low frequency (f = 3 GHz), the target realizes a considerable RCS reduction in a wide bistatic angular range. In the high frequency (f = 18 GHz), the reduction performance is not as good as low frequency. The results also show that by the effect of plasma and metamaterial, the reduction performance is much better than coated with plasma.