MHz range analysis by FDTD/autoregressive moving average model method

MHz frequency range is widely used as Induction Heating (IH) heater, wireless power transfer (WPT) system and so on. On the other hands, the FDTD method is powerful tools for complicated models. However, long calculation time is required in MHz range analysis by FDTD method, because, time period of MHz range becomes long, and the time step size of the FDTD method should be small with cell size reducing. In this paper, in order to accelerate of FDTD MHz range analysis, we utilize an Autoregressive moving average model (ARMA) for MHz range FDTD analysis. In this paper, we calculate input impedance of dipole antenna. In the ARMA model, linear transfer function H(z) as indicated below is used to estimate calculation result such as input impedance of the antenna.