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Evanescent waves in PML's: origin of the numerical reflection in wave-structure interaction problems

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1 Author(s)
Berenger, J.-P. ; Centre d''Analyse de Defense, Arcueil, France

The theory of general evanescent waves in perfectly matched layers (PMLs) is presented, both in a continuous medium and in a discretized finite-difference medium. It is shown that evanescent waves may be strongly reflected from vacuum-PML interfaces in the discretized case. This allows the numerical reflection observed in wave-structure interaction problems to be interpreted as the reflection of evanescent fields surrounding the structures

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Antennas and Propagation, IEEE Transactions on  (Volume:47 ,  Issue: 10 )