A High-Order Unconditionally Stable FDTD-Based Propagation Method

This letter introduces a finite-difference time-domain (FDTD) propagation method employing a moving window algorithm and a new formulation based on three features: high-order and unconditionally stable method with a material independent perfect matched layer (PML) formulation. The achievement is an efficient and accurate time-domain (multiband) propagation method. The formulation is validated through an analytic problem. Finally, we analyze two measurement campaigns with HF and VHF signals to evaluate the performance of method.