FDTD Analysis of Dipole Antenna on Multilayer Dielectric Slab

The FDTD method, which is one of the electromagnetic field analysis methods, has a problem that the time step width becomes small and the analysis cost increases due to the CFL condition when an attempt is made to accurately discretize and analyze a structure that is thinner than the wavelength. There is a subcell method as an analysis method for avoiding this problem, but few examples have been analyzed for a thin multilayer medium. Therefore, the purpose of this research is to reduce the cost of the analysis of multi-layer media that is thinner than the wavelength. In this paper, we analyze the effectiveness of this method by analyzing the antenna on a multilayer dielectric slab using the subcell method.