Finite Difference Time Domain Formulations for 2D Scattering Problems With Oblique Incident Plane Waves

The electromagnetic scattering from two dimensional objects under oblique incident plane wave using the finite difference time domain technique is hardly realized. In a recent attempt, the constant-kz formulation is reported where the numerical results can only be provided, after one simulation, for a limited number of frequencies each associated with a specific oblique incident angle. The approach proposed here provides a broader frequency range results for any selected angle of incidence using one simulation on a 2D finite difference grid. Formulations and sample simulation results are presented.