A finite-difference time-domain method for solving electromagnetic problems with bandpass-limited sources

Author

Pursel, J.D. ; Goggans, P.M.

Author_Institution

Dept. of Electr. Eng., Mississippi Univ., MS, USA

Volume

47

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

9

Lastpage

15

Abstract

The complex-envelope representation of bandpass-limited signals is used to formulate a bandpass-limited vector wave equation and a new finite-difference time-domain (FDTD) scheme that solves the bandpass-limited vector wave equation is presented. For narrow-band electromagnetic systems, this new method allows the time step to be several orders of magnitude larger than current FDTD formulations while maintaining an amplification factor equal to one. Example results obtained by this method are presented and compared with analytic solutions

Keywords

bandlimited signals; electromagnetic wave propagation; finite difference time-domain analysis; signal representation; signal sampling; wave equations; FDTD; amplification factor; bandpass-limited signals; bandpass-limited sources; complex-envelope representation; electromagnetic problems solution; finite-difference time-domain method; lD free-space filled cavity; lowpass-limited sampling theorem; narrow-band electromagnetic systems; perfect electric conducting walls; plane wave source; vector wave equation; Bandwidth; Electromagnetic scattering; Finite difference methods; Fourier transforms; Frequency; Narrowband; Partial differential equations; Power line communications; Sampling methods; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.752978

Filename

752978