Radar cross section of symmetric parabolic reflectors with cavity-backed dipole feeds

Author

Jenn, D.C. ; Fletcher, J.E. ; Prata, A.

Author_Institution

Dept. of Electr. & Comput. Eng., US Naval Postgraduate Sch., Monterey, CA, USA

Volume

41

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

992

Lastpage

994

Abstract

The monostatic radar cross section (RCS) of a symmetric parabolic reflector antenna with a cavity-backed dipole feed is computed using the method of moments. At frequencies below the operating frequency band of the antenna the dipole contribution is not significant; in the operating band the dipole terminal load condition only affects the RCS near boresight. The f/D ratio of the antenna is shown to have a significant effect on the RCS. By adjusting the focal length, the cavity and paraboloid scattering contributions can be made to partially cancel, yielding a reduction in RCS near boresight

Keywords

antenna feeders; electromagnetic wave scattering; numerical analysis; radar cross-sections; reflector antennas; RCS; boresight; cavity-backed dipole feeds; f/D ratio; focal length; method of moments; monostatic radar cross section; paraboloid scattering; reflector antenna; symmetric parabolic reflectors; Antenna feeds; Dipole antennas; Frequency; Loaded antennas; Moment methods; Radar antennas; Radar cross section; Reflector antennas; Surface waves; Wire;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.237635

Filename

237635