Title :
Efficient implementation of 3-D ADI-FDTD method for lossy media
Author :
Heh, Ding Yu ; Tan, Eng Leong
Author_Institution :
Sch. of EEE, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
This paper presents the efficient implementation of 3-D alternating direction implicit finite-difference time-domain (ADI-FDTD) method for lossy media. Utilizing forward-backward scheme and symmetrical source implementation, the efficient ADI-FDTD method features better efficiency and simplicity where the conductivity terms and source excitation are required only for the first substep. Detail formulation of the efficient algorithm is shown and it yields exactly the same computation as the conventional ADI-FDTD method for lossy media. The accuracy and higher efficiency are also illustrated and verified by means of numerical results.
Keywords :
absorbing media; finite difference time-domain analysis; microwave materials; radiowave propagation; 3D ADI-FDTD method; alternating direction implicit finite-difference time-domain; forward-backward scheme; lossy media; symmetrical source implementation; Conductivity; Current density; Finite difference methods; Maxwell equations; Numerical simulation; Symmetric matrices; Time domain analysis; Alternating direction implicit finte-difference time-domain (ADI-FDTD); lossy media; unconditionally stable method;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165696
