A modified FDTD implementation for EM scattering by stratified medium for oblique incidence by TM wave

A modified FDTD implementation, by which EM wave transmission characteristic can be analyzed for oblique incidence on stratified medium, is proposed. This method transforms two-dimensional electromagnetic wave transmission question as one-dimensional question, FDTD iterative formula are deduced in the TM wave oblique incidence situation, and the connection boundary (CB) and the absorbing boundary condition (ABC) in the oblique incidence situation are carried out the revision. The EM wave reflection coefficients of the medium slab and isotropic plasma slab are calculated in the TM wave oblique incidence situation, the computed results and the analytic solutions are in good agreement. The computed results indicate the accuracy and validity of this method.