Title :
Dispersion analysis of the three-dimensional complex envelope ADI-FDTD method
Author :
Ma, Changning ; Chen, Zhizhang David
Author_Institution :
Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada
fDate :
3/1/2005 12:00:00 AM
Abstract :
In this paper, numerical dispersion properties of the three-dimensional complex envelope (CE) alternate-direction implicit finite-difference time-domain (ADI-FDTD) method are studied. The variations of dispersion errors with propagation direction, ratio of carrier to envelope frequencies, and spatial and temporal steps are presented. It is found that the CE ADI-FDTD scheme have much better accuracy and efficiency over the ADI-FDTD, especially with a higher ratio of carrier to envelope frequencies. Therefore, the CE ADI-FDTD is recommended for use in efficient narrow bandwidth electromagnetic modeling.
Keywords :
electromagnetic wave propagation; finite difference time-domain analysis; 3D complex envelope ADI-FDTD method; alternate-direction implicit finite-difference time-domain; carrier-to-envelope frequencies ratio; narrow bandwidth electromagnetic modeling; numerical dispersion properties; propagation direction; Bandwidth; Councils; Electromagnetic modeling; Finite difference methods; Frequency; Maxwell equations; Narrowband; Stability; Time domain analysis; Two dimensional displays; Alternate-direction implicit finite-difference time-domain (ADI-FDTD); complex envelope (CE); numerical dispersion;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.842602
