Scattering from a rectangular cavity using FDTD

Author

Penney, C. ; Luebbers, R.

Author_Institution

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

fYear

1993

fDate

June 28 1993-July 2 1993

Firstpage

1780

Abstract

Far zone backscatter from a perfectly conducting rectangular cavity with one open end has been measured. The cavity is 2.5 /spl times/ 2.5 /spl times/ 3.75 inches, with one of the 2.5 /spl times/ 2.5 inch square ends open. Wide-frequency bandwidth backscatter measurements were made at 0/spl deg/ incidence (directly into the opening of the cavity), 33.5/spl deg/, and 53.5/spl deg/ for both polarizations. Calculations of the radar cross section (RCS) of the cavity were made using a finite difference time domain (FDTD) computer code, which uses a scattered field formulation for the FDTD calculations with linear time differencing. Example results are shown, including the time-domain far-zone backscattered electric field, and the corresponding scattering cross section compared with measured results.<>

Keywords

backscatter; finite difference time-domain analysis; radar cross-sections; backscatter measurements; finite difference time domain; linear time differencing; perfectly conducting rectangular cavity; radar cross section; scattered field formulation; Dielectric loss measurement; Electric variables measurement; Electromagnetic transients; Finite difference methods; Frequency measurement; Polarization; Radar cross section; Radar scattering; Time domain analysis; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1993. AP-S. Digest

Conference_Location

Ann Arbor, MI, USA

Print_ISBN

0-7803-1246-5

Type

conf

DOI

10.1109/APS.1993.385547

Filename

385547