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Conformal Perfectly Matched Layer for the Mixed Finite Element Time-Domain Method

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2 Author(s)
Donderici, B. ; Ohio State Univ., Columbus ; Teixeira, F.L.

We introduce a conformal perfectly matched layer (PML) for the finite-element time-domain (FETD) solution of transient Maxwell equations in open domains. The conformal PML is implemented in a mixed FETD setting based on a direct discretization of the first-order coupled Maxwell curl equations (as opposed to the second-order vector wave equation) that employs edge elements (Whitney 1-form) to expand the electric field and face elements (Whitney 2-form) to expand the magnetic field. We show that the conformal PML can be easily incorporated into the mixed FETD algorithm by utilizing PML constitutive tensors whose discretization is naturally decoupled from that of Maxwell curl equations (spatial derivatives). Compared to the conventional (rectangular) PML, a conformal PML allows for a considerable reduction on the amount of buffer space in the computational domain around the scatterer(s).

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:56 ,  Issue: 4 )

Date of Publication:

April 2008

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