A Beam-Scanning Dual-Polarized Fan-Beam Antenna Suitable for Millimeter Wavelengths

Author

Hay, Stuart G. ; Archer, John W. ; Timms, Greg P. ; Smith, Stephanie L.

Author_Institution

Commonwealth Sci. & Ind. Res. Organ., ICT Centre, Epping, NSW, Australia

Volume

53

Issue

8

fYear

2005

Firstpage

2516

Lastpage

2524

Abstract

The design and testing of a beam-scanning pillbox antenna for use in a 200 GHz imaging system is presented. The antenna features a rotating subreflector that scans the antenna\´s fan beam and a multimode structure that reduces ohmic loss and allows use of two orthogonal polarizations. The antenna has an aperture size of 450 $,\\times,$ 5 mm, half-power beam widths of approximately 0.4 $^\\circ$ and 18 $^\\circ$ and a beam-scan range of 10 $^\\circ$ . The gain of the antenna was measured to be greater than 33 dBi for both polarizations. The radiation patterns of the pillbox antenna have been measured in the radiating near field using an outdoor range. Good agreement between measured and calculated patterns has been obtained.

Keywords

antenna radiation patterns; antenna testing; aperture antennas; electromagnetic wave polarisation; millimetre wave antennas; millimetre wave imaging; reflector antennas; scanning antennas; 200 GHz; 2250 mm; antenna theory; aperture antenna; beam-scanning pillbox antenna testing; dual-polarized fan-beam antenna; half-power beam width; imaging system; millimeter wavelength; multimode structure; orthogonal polarization; radiation near field measurement; rotating subreflector; Antenna accessories; Antenna measurements; Antenna radiation patterns; Costs; Directive antennas; Frequency; Optical imaging; Optical receivers; Polarization; Receiving antennas; Antenna radiation patterns; antenna theory; scanning antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2005.852298

Filename

1492595