Numerical dispersion performances of ADI-FDTD and S-FDTD methods have been compared. It has been shown that for time steps below the stability limits of the S-FDTD method it has much better dispersion performance compared with the ADI-FDTD method and that the S-FDTD method can be usefully employed for space increments in the order of \lambda/25 to \lambda/50.
Symplectic finite-difference time-domain (S-FDTD) method, alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method
KUŞAF, MEHMET and ÖZTOPRAK, ABDULLAH Y. (2008) "Dispersion Analysis of the ADI-FDTD and S-FDTD Methods," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 16: No. 3, Article 3. Available at: https://journals.tubitak.gov.tr/elektrik/vol16/iss3/3