Title :
Evanescent waves in PML´s: origin of the numerical reflection in wave-structure interaction problems
Author :
Berenger, Jean-Pierre
Author_Institution :
Centre d´´Analyse de Defense, Arcueil, France
fDate :
10/1/1999 12:00:00 AM
Abstract :
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
Keywords :
dispersion (wave); electromagnetic fields; electromagnetic wave reflection; electromagnetic wave scattering; finite difference time-domain analysis; FDTD medium; PML; continuous medium; discretized finite-difference medium; dispersion relation; evanescent fields reflection; general evanescent waves; numerical electromagnetics; numerical reflection; perfectly matched layers; scattering structures; vacuum-PML interfaces; wave-structure interaction problems; Boundary conditions; Dispersion; Electromagnetic fields; Electromagnetic scattering; Finite difference methods; Microwave theory and techniques; Perfectly matched layers; Reflection; Tellurium; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
