An efficient MHz range analysis by ARMA-FDTD method with AIC

MHz frequency range is often used for wireless power transmission (WPT), antenna engineering and so on. The FDTD method is one of the powerful tools in EM field. In the FDTD method, small cell size is required to model complex geometry such as human body. Therefore, the FDTD method needs long calculation time in MHz range analysis, because the time step of the FDTD method is should be small with cell size reducing. Furthermore, time period of MHz range becomes long. On the other hand, ARMA (Autoregressive moving average model)-FDTD method is effective to reduce calculation time. In this research, ARMA-FDTD is applied to MHz range analysis to reduce calculation time. Furthermore, AIC (Akaike Information Criterion) is utilized to determine number of coefficients in ARMA-FDTD method.