Application of the FDTD Hybrid “M3d24-Yee” for simulating EM scattering from two objects separated by long distances

In this paper we present the application of the hybrid "M3d₂₄-Yee" with subgridding algorithm for solving problems of the electromagnetic radiation or scattering from multiple objects separated by long distances. The large distances between the objects is simulated using the M3d₂₄ with low-resolution grid while the objects and the surrounding regions around the objects are simulated using the Yee algorithm with high resolution. For a test case of scattering from two PEC parallelepipeds the memory required for the M3d₂₄-Yee scheme is found to be less than 10% of the memory required for the Yee algorithm to solve the same problem.