An Unconditionally Stable Conformal LOD-FDTD Method for Curved PEC Objects and its Application to EMC Problems

The traditional finite-difference time-domain (FDTD) method is constrained by the Courant–Friedrich–Levy condition and suffers from notorious staircase error in electromagnetic simulations. This article proposes a 3-D conformal locally one-dimensional FDTD (CLOD-FDTD) to address two issues for modeling perfectly electrical conducting (PEC) objects. By considering partially filled cells, proposed CLOD-FDTD can significantly improve accuracy compared with (LOD-FDTD) method. At same time, preserves unconditional stability, which analyzed numerically validated using von Neumann Significant gains central processing unit time are achieved large steps without sacrificing accuracy. Two numerical examples, including PEC cylinder missile, used verify its efficiency different meshes steps. It be found these examples that shows better those of LOD-FDTD