Bifocal Reflector Antenna for a Standoff Radar Imaging System With Enhanced Field of View

Author

Garcia-Pino, Antonio ; Gonzalez-Valdes, Borja ; Rubinos, Oscar ; Grajal, Jesus ; Badolato, Antonio ; Mencia-Oliva, Beatriz ; Garcia Soidan, Pilar ; Besada-Sanmartin, Jose Luis

Author_Institution

Antenna Group, Univ. of Vigo, Vigo, Spain

Volume

62

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

4997

Lastpage

5006

Abstract

A unique multireflector bifocal antenna design for real-time standoff imaging applications is presented in this work. The antenna is used in combination with a 300 GHz radar sensor to acquire images at 8 m over a large (80 × 50 cm) field of view (FoV). The increased FoV is obtained by the use of an antenna system composed by a bifocal elliptical Gregorian with an extended subreflector to allow for fast scanning of a beam spot. The scanning is achieved by the combination of the rotation and vertical tilting of a flat small secondary mirror. The design, simulations, prototype description and experimental results of a manufactured working prototype are presented.

Keywords

millimetre wave antennas; millimetre wave radar; radar antennas; radar imaging; reflector antennas; scanning antennas; submillimetre wave antennas; submillimetre wave radar; antenna system; beam spot fast scanning; bifocal elliptical Gregorian; bifocal reflector antenna; extended subreflector; flat small secondary mirror; frequency 300 GHz; radar sensor; rotation tilting; standoff radar imaging system; vertical tilting; view field enhancement; Apertures; Feeds; Imaging; Mirrors; Radar antennas; Radar imaging; Imaging; imaging radar; inverse scattering; submillimeter-waves;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2346214

Filename

6873257