Abstract: A solution to the electromagnetic scattering problem for core-mantle (two-layered) spheroidal particles is obtained by separation of variables in the spheroidal coordinate system by considering the boundary condition for the dielectric medium and the target. The incident field, the scattered field and the internal radiation field are divided into the axisymmetric and the non-axisymmetric part in this study. The angular distributions of RCS of the backscattering and bistatic scattering from the spheroid covered with the plasma are presented by numerical implementations, and the dependences of RCS on different physical quantities such as the incident frequency, the azimuth angle, the collision frequency, the electron concentration as well as the thickness of the plasma mantle are discussed in detail. The results obtained are of the important significance for the investigation of the core-mantle spheroidal particles covered with the plasma.

Key words: plasma, core-mantle spheroid, electromagnetic scattering, collision frequency, electric density