Optimum PML ABC conductivity profile in FDFD

Author

Margengo, E.A. ; Rappaport, Carey M. ; Miller, Eric L.

Author_Institution

Center for Electromagn. Res., Northeastern Univ., Boston, MA, USA

Volume

35

Issue

3

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

1506

Lastpage

1509

Abstract

We address the problem of optimally choosing the conductivity (σ) profile of a perfectly-matched-layer absorbing boundary condition (PML ABC) with prescribed number of layers so as to minimize reflections for a wide range of incidence angles and for a narrow (CW) or broad frequency-band. A new one-dimensional (1-D), frequency-domain description of 2-D PML performance is developed, validated and used in PML-σ profile optimization. An exhaustive search for PML-σ profiles that minimize reflections over a prescribed wide angle-range is carried out. Our procedure yields PML-σ profiles with better performance than previously reported values, for given number of layers

Keywords

electrical conductivity; electromagnetic wave absorption; electromagnetic wave reflection; finite difference methods; frequency-domain analysis; 2-D PML performance; EM field computation; EM reflections minimisation; FDFD; absorbing boundary condition; broad frequency-band; conductivity profile; finite difference frequency domain analysis; incidence angles; narrow frequency-band; one-dimensional frequency-domain description; perfectly-matched-layer; Bandwidth; Boundary conditions; Conductivity; Cost function; Electromagnetic reflection; Finite difference methods; Frequency; Lattices; Magnetic fields; Time domain analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.767253

Filename

767253