Title :
Characteristics of the Boundary Model in the 2-D NS-FDTD Method
Author :
Ohtani, Tadao ; Kanai, Yasushi
Abstract :
This paper investigates the representation of the dielectric boundary and the absorbing boundary conditions (ABC) that are major concerns in the nonstandard FDTD (NS-FDTD) method. The effective permittivity model of the dielectric boundary is examined and it is found that its accuracy decreases when the boundary coincides with a node. To overcome this difficulty, we propose an alternative, highly accurate boundary model based on an analytic boundary condition. The accuracy of Berenger´s split-field perfectly matched layer (PML) as an ABC is also demonstrated for the NS-FDTD algorithm.
Keywords :
finite difference time-domain analysis; permittivity; 2D NS-FDTD method; Berenger split-field perfectly matched layer; absorbing boundary condition; analytic boundary condition; boundary model; dielectric boundary condition; effective permittivity model; nonstandard finite difference time-domain method; Accuracy; Analytical models; Boundary conditions; Dielectrics; Finite difference methods; Permittivity; Time domain analysis; Absorbing boundary conditions; dielectric boundary condition; effective permittivity model; nonstandard FDTD methods; perfectly matched layer;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2173160
