Title :
An FDTD formulation for dispersive media using a current density
Author :
Chen, Qing ; Katsurai, Makoto ; Aoyagi, Paul H.
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ., Japan
fDate :
11/1/1998 12:00:00 AM
Abstract :
A novel finite-difference time-domain (FDTD) formulation for dispersive media called the JE convolution (JEC) method is derived using the convolution relationship between the current density J and the electric field E. The high accuracy of the JEC method is confirmed by computing the reflection and transmission coefficients for a nonmagnetized plasma slab in one dimension. It is found that the new method has an accuracy comparable to the auxiliary differential equation (ADE) while having the same computational efficiency as the less accurate recursive convolution (RC) method. Numerical simulations also show that the JEC method exhibits significantly higher accuracy than the RC method in modeling wave attenuation inside the plasma
Keywords :
convolution; current density; dispersive media; electromagnetic wave absorption; electromagnetic wave reflection; electromagnetic wave transmission; finite difference time-domain analysis; plasma electromagnetic wave propagation; 1D nonmagnetized plasma slab; FDTD formulation; JE convolution method; accuracy; auxiliary differential equation; computational efficiency; current density; dispersive media; electric field; finite-difference time-domain; numerical simulations; recursive convolution; reflection coefficient; transmission coefficient; wave attenuation modeling; Convolution; Current density; Differential equations; Dispersion; Finite difference methods; Plasma density; Plasma simulation; Reflection; Slabs; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on