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MODAL ABSORPTION IN THE FDTD METHOD: A CRITICAL REVIEW
Author(s) -
ALIMENTI F.,
MEZZANOTTE P.,
ROSELLI L.,
SORRENTINO R.
Publication year - 1997
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/(sici)1099-1204(199707)10:4<245::aid-jnm278>3.0.co;2-p
Subject(s) - finite difference time domain method , modal , lossless compression , absorption (acoustics) , homogeneous , perfectly matched layer , computer science , implementation , boundary value problem , mathematics , algorithm , calculus (dental) , mathematical analysis , physics , optics , materials science , combinatorics , data compression , polymer chemistry , programming language , medicine , dentistry
This paper deals with absorbing boundary conditions for the finite difference time domain (FDTD) method applied to homogeneous lossless waveguide structures. A theoretical formulation of the so‐called ‘modal absorption’ (MA) is developed. On the basis of this theory different implementations available in the literature have been derived and compared. Then, some techniques to enhance the efficiency of the method have been proposed and tested. It is demonstrated that, with the proposed methods, the high level of accuracy of the original formulations is retained, while the computational cost is strongly reduced. © 1997 John Wiley & Sons, Ltd.