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MODAL ABSORPTION IN THE FDTD METHOD: A CRITICAL REVIEW

✍ Scribed by F. ALIMENTI; P. MEZZANOTTE; L. ROSELLI; R. SORRENTINO

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
413 KB
Volume
10
Category
Article
ISSN
0894-3370

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✦ Synopsis

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.

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