A two-dimensional time-domain near-zone to far-zone transformation

Author

Luebbers, Raymond ; Ryan, Deirdre ; Beggs, John

Author_Institution

Dept. of Electr. & Comput. Eng., Pennsylvania State Univ., University Park, PA, USA

Volume

40

Issue

7

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

848

Lastpage

851

Abstract

A 2D version of a time-domain transformation useful for extrapolating 3D near-zone finite-difference time-domain (FDTD) results to the far zone is outlined. While the 3D transformation produced a physically observable far-zone time-domain field, this is not convenient for the 2D case. However, a representative, 2D far-zone time-domain result can be obtained directly. This result can then be transformed to the frequency domain using a fast Fourier transform, corrected with a simple multiplicative factor, and used, for example, to calculate the complex wideband scattering width of a target. If an actual time-domain far zone result is required, it can be obtained by inverse Fourier transform of the final frequency-domain result

Keywords

electromagnetic wave scattering; time-domain analysis; 3D near zone FDTD results; complex wideband scattering width; electromagnetic scattering; fast Fourier transform; frequency domain; inverse Fourier transform; near-zone to far-zone transformation; time-domain transformation; Antenna radiation patterns; Engine cylinders; Fast Fourier transforms; Finite difference methods; Fourier transforms; Frequency domain analysis; Integral equations; Radar scattering; Time domain analysis; Wideband;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.155753

Filename

155753