Numerical analysis of the electromagnetic wave scattering from a moving dielectric body by Overset Grid Generation method

This paper presents an alternative approach for the analysis of EM field with moving boundaries by FDTD method combined with Overset Grid Generation method, considering Lorentz transformation for the higher velocity cases. This approach has been previously proposed for the case of moving/rotating body with empty grids. Here, the approach is expanded to a moving dielectric body that moves linearly towards and against to the incident wave. The scattering of the EM fields when the incident wave hits the dielectric moving body with high velocity are analyzed. The numerical results are compared with the theoretical results and achieved good agreements between both results. This numerical approach may have numerous situations to which it can be applied. This may be involved with the design of the high-frequency devices such as microactuator, commutator and the others.