Validation of FDTD RCS computations for PEC targets

Author

Trueman, C.W. ; Kubina, S.J. ; Luebbers, R.J. ; Kunz, K.S. ; Mishra, S.R. ; Larose, C.

Author_Institution

Concordia Univ., Montreal, Que., Canada

fYear

1992

fDate

18-25 June 1992

Firstpage

1984

Abstract

The radar cross-section (RCS) of perfectly conducting (PEC) targets calculated by the finite-difference time-domain (FDTD) method is compared with measured data. For face-on incidence on a cube, excellent agreement is obtained over a 30-to-1 frequency range. For end-on incidence on a 200*20*20 cell rod, very good agreement is obtained over the measurement range of size from 0.5 lambda to 10 lambda rod length, provided 20 cells of free-space separate the rod from the absorbing boundary. For a 110*11 cell circular cylinder, very good agreement is obtained out to lengths of 10 lambda with 22 cells of white space. Thinner white spaces greatly reduce the computation time, but compromise the agreement with the measurement.<>

Keywords

conductors (electric); finite difference time-domain analysis; radar cross-sections; FDTD; PEC targets; absorbing boundary; cell rod; circular cylinder; cube; end-on incidence; face-on incidence; finite-difference time-domain; measurement; perfectly conducting targets; radar cross-section; rod length; white space; Finite difference methods; Frequency; Laboratories; Length measurement; Radar cross section; Radar measurements; Radar scattering; Surface waves; Testing; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE

Conference_Location

Chicago, IL, USA

Print_ISBN

0-7803-0730-5

Type

conf

DOI

10.1109/APS.1992.221480

Filename

221480