Title :
Exponential time differencing for QPML in cylindrical FDTD
Author :
Ma, JiaJun ; Cao, Xiang Yu ; Liu, Tao
Author_Institution :
Telecommun. Eng. Inst., Air Force Eng. Univ., Xi´´an
Abstract :
The exponential time-differencing (ETD) schemes for the Quasi-PML (QPML) for coordinates finite-difference time-domain (FDTD) is presented in this paper. By these results we can see that the ETD-QPML algorithm is more accurate and efficient than centered time-differencing schemes, and the ETD-QPML algorithm requires only 3 PML-layers in ETD scheme instead of at least 10 PML-layers in centered time-differencing case, it can also provide a comparative absorption level, generally about -80 Db reflection error, in two dimensional FDTD.
Keywords :
computational electromagnetics; electromagnetic wave absorption; finite difference time-domain analysis; inhomogeneous media; QPML; absorption level; coordinates finite-difference time-domain; cylindrical FDTD; exponential time differencing; perfectly matched layer; Absorption; Computational modeling; Dielectric losses; Difference equations; Electromagnetic scattering; Finite difference methods; Grid computing; Maxwell equations; Optical reflection; Time domain analysis;
Conference_Titel :
Automation Congress, 2008. WAC 2008. World
Conference_Location :
Hawaii, HI
Print_ISBN :
978-1-889335-38-4
Electronic_ISBN :
978-1-889335-37-7
