Title :
3-D Isotropic Dispersion FDTD Algorithm for Rectangular Grid
Author :
Kim, Woo-Tae ; Koh, Il-Suek ; Yook, Jong-Gwan
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fDate :
7/2/1905 12:00:00 AM
Abstract :
An updated equation of the 3-D isotropic dispersion finite-difference time-domain (ID-FDTD) scheme is proposed for a rectangular grid. The scaling and weighting factors are formulated to reduce the anisotropic dispersion error. Especially, the least mean square (LMS) method is used to calculate the weighting factors to minimize the fluctuation of the dispersion over an entire spatial domain. The dispersion behavior of the proposed ID-FDTD scheme is characterized. Then, the formulated 3-D ID-FDTD scheme is verified for two scattering problems.
Keywords :
dispersion (wave); electromagnetic wave scattering; finite difference methods; least squares approximations; time-domain analysis; 3D isotropic dispersion finite-difference time-domain scheme; anisotropic dispersion error reduction; least mean square method; rectangular grid; scaling factors; weighting factors; Finite-difference time domain (FDTD); isotropic dispersion; least mean square (LMS); numerical analysis; radar cross section (RCS); rectangular grid;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2010.2051313
