A new FDTD algorithm - ADI/R-FDTD

Making use of the two modified finite-difference time-domain (FDTD) methods, that is, ADI-FDTD and R-FDTD, we propose a new time domain method in this paper. The method is established from Maxwell curl and divergence equations. It inherits the advantages of both former methods, i.e., not only eliminating the restraint of the Courant-Friedrich-Levy (C-F-L) condition, with an efficient saving of CPU time, but also leading to a direct memory reduction of 33% in the storage of the field components. The formulation is presented and some results of numerical examples are compared to FDTD, ADI-FDTD and R-FDTD. Good agreement is observed.