Numerical reflection from FDTD-PMLs: a comparison of the split PML with the unsplit and CFS PMLs

Author

Wrenger, J.-P.

Author_Institution

Centre d´Analyze de Defense, Arcueil

Volume

50

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

258

Lastpage

265

Abstract

Although perfectly matched layer (PML) absorbing boundary conditions are perfect in theory, an amount of spurious reflection is present in actual computations with the finite-difference time-domain (FDTD) method. This paper compares the reflections produced by three different PMLs, namely the split PML, the unsplit PML, and the recently introduced complex frequency shifted (CFS) PML. It is shown that the reflections from the split and unsplit PMLs are identical, while the CFS PML allows the reflection of evanescent waves to be significantly reduced

Keywords

electromagnetic wave absorption; electromagnetic wave reflection; finite difference time-domain analysis; CFS PML; FDTD method; FDTD-PML; absorbing boundary conditions; complex frequency shifted PML; evanescent waves reflection; finite-difference time-domain method; numerical reflection; perfectly matched layer; split PML; spurious reflection; unsplit PML; Boundary conditions; Difference equations; Finite difference methods; Finite element methods; Frequency; Perfectly matched layers; Reflection; Tellurium; Time domain analysis; Two dimensional displays;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.999615

Filename

999615