Title :
Determination of optimum conductivity profile for PML and PML-D using multiple-variables Pade approximation
Author :
Jing Cao ; Ao Sheng Rong ; Hua Xin Wang ; Xing Hao Chen
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
A novel technique is presented for the determination of the optimum conductivity profiles of the PML and PML-D. A closed-form interpolation function of numerical reflection coefficients with respect to the frequency and the conductivity profiles is given by extending the multiple-variables Pade approximation. With the closed-form expression, the anneal simulation optimum algorithm is used to minimize the reflection coefficient of PML and PML-D for a given frequency range. Numerical experiments are presented to show that a significant performance improvement can be achieved by optimizing the conductivity profiles of the PML and PML-D.
Keywords :
electrical conductivity; electromagnetic wave reflection; finite difference time-domain analysis; interpolation; simulated annealing; FDTD; PML; PML-D; absorbing boundary condition; conductivity profile; electromagnetic wave reflection coefficient; interpolation function; multiple-variables Pade approximation; numerical method; optimization algorithm; simulated annealing; Boundary conditions; Conductivity; Electromagnetic reflection; Electronic mail; Finite difference methods; Frequency; Interpolation; Laboratories; Millimeter wave technology; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.863557
