Abstract:

The relationship of permittivity tensor of anisotropic medium in principal coordinate system and laboratory coordinate system is given. The characteristics of permittivity tensor of uniaxial anisotropic medium in the laboratory coordinate system are discussed. Then, divided the uniaxial anisoptropic medium along the axes of the laboratory coordinate system into three same dimension sample plates. The back scattering characteristics of the samples are discussed when the direction of electric field polarization is changed and the electromagnetic (EM) wave incident perpendicularity to the samples plate. A new scheme confirming the optic axis direction of the uniaxial medium in laboratory coordinate system is proposed. Using the finite difference time domain (FDTD) method the back scattering radar cross section (RCS) of a lossy anisotropic plate is computed when the EM wave is perpendicularity to the plate. A numerical example is presented. The computed results show the availability of the presented scheme.