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

Volume

47

Issue

10

fYear

1999

fDate

10/1/1999 12:00:00 AM

Firstpage

1497

Lastpage

1503

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;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.805891

Filename

805891