Unconditionally stable nearly PML algorithm for linear dispersive media

Author

Ramadan, Omar

Author_Institution

Comput. Eng. Dept., Eastern Mediterranean Univ., Mersin, Turkey

Volume

15

Issue

7

fYear

2005

fDate

7/1/2005 12:00:00 AM

Firstpage

490

Lastpage

492

Abstract

Unconditional stable alternating direction implicit (ADI) formulations of the nearly perfectly matched layer (NPML) are presented for truncating linear dispersive finite difference time domain (FDTD) grids. The digital signal processing (DSP) algorithms developed for digital filters are used to implement the frequency dependent property of the media into the ADI-FDTD algorithm. The formulations have the advantage of simplicity of ADI-FDTD implementation. Numerical examples carried out for linear Debye and Lorentz dispersive domains are included to validate the proposed formulations.

Keywords

digital filters; dispersive media; electromagnetic wave propagation; finite difference time-domain analysis; signal processing; ADI-FDTD algorithm; alternating direction implicit formulations; digital filters; digital signal processing algorithms; finite difference time domain; frequency dependent property; linear Debye dispersive domains; linear Lorentz dispersive domains; linear dispersive FDTD grids; linear dispersive media; nearly perfectly matched layer; unconditionally stable nearly PML algorithm; Digital filters; Digital signal processing; Dispersion; Electromagnetic scattering; Equations; Finite difference methods; Frequency dependence; Perfectly matched layers; Signal processing algorithms; Time domain analysis; Alternating direction implicit (ADI); digital signal processing (DSP); finite difference time domain (FDTD); nearly perfectly matched layer (PML);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.851581

Filename

1458819