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Modeling the electromagnetic field in lossy dielectrics using finite elements and vector absorbing boundary conditions

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2 Author(s)
V. N. Kanellopoulos ; Lab. de Genie Electr. de Paris, CNRS, Gif-sur-Yvette, France ; J. P. Webb

A new functional for the finite element method is described for the distribution of high-frequency electromagnetic fields in arbitrarily shaped, lossy dielectrics in 3D. The method uses a brick-shaped edge element (covariant-projection element) and a second-order, symmetric, vector absorbing boundary condition. Analytic solutions are available for the case of a plane wave incident on a lossy sphere, and these are used to show that the new method is capable of predicting the fields in and around the sphere to an average accuracy of 1-2%, even when the outer, absorbing boundary is no more than a third of a wavelength from the sphere

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:43 ,  Issue: 4 )