Title :
A problem about TF/SF technique in the FDTD simulations of cylindrical waves and spherical waves
Author :
Jianyong Wang;Cuihong Liu
Author_Institution :
Department of Mathematics and Physics, Hohai University, Changzhou, Jiangsu Province, 213022, China
Abstract :
The finite difference time domain methods(FDTD methods) are the most popular simulation methods of the electromagnetic waves, and the total field/scattered field technique(TF/SF technique) is the main source technique of the FDTD methods. The amplitude of the electric fields and the amplitude of the magnetic fields are considered as invariant in the connection interface between the total field regions and the scattered field regions, when cylindrical waves and spherical waves are simulated by the FDTD methods and the TF/SF technique is applied. But this consideration is wrong because that the amplitude of cylindrical waves and the amplitude of spherical waves are both not constants on the direction of propagation, and thus the computational results are effected. A new method for applying TF/SF technique in the FDTD simulations of cylindrical waves and spherical waves is brought forward. The method considers the variations of the amplitude of cylindrical waves and the amplitude of spherical waves on the direction of propagation, and thus the problem is solved. Numerical experiments were done, and the experiments indicate that the new method can effectively improve the simulation results.
Keywords :
"Finite difference methods","Decision support systems","Time-domain analysis","Power industry","Electromagnetic scattering","Electric fields","Magnetic fields"
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2015 5th International Conference on
DOI :
10.1109/DRPT.2015.7432491