Title :
Accurate implementation of current sources in the ADI-FDTD scheme
Author :
García, S. González ; Bretones, A. Rubio ; Martín, R. Gómez ; Hagness, Susan C.
Author_Institution :
Departimento Electromagnetismo y Fisica de la Materia, Granada Univ., Spain
Abstract :
This letter presents a new method of implementing current sources in the alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method. The current source condition is derived systematically, starting with the fully implicit Crank-Nicolson (CN) FDTD scheme for Maxwell´s curl equations and building the ADI-FDTD scheme as a second-order-in-time perturbation of the CN-FDTD scheme. We demonstrate that the accuracy of this new source condition is superior to previously proposed techniques.
Keywords :
Maxwell equations; computational electromagnetics; finite difference time-domain analysis; perturbation techniques; ADI-FDTD scheme; CN-FDTD scheme perturbation; Crank-Nicolson scheme; Maxwell curl equations; alternating-direction-implicit FDTD; current source implementation; finite-difference time-domain method; incident wave source conditions; numerical stability;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2004.831078
