DocumentCode :
1131622
Title :
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 
5 mm, half-power beam widths of approximately 0.4 
and 18 and a beam-scan range of 10 . 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.
5 mm, half-power beam widths of approximately 0.4 and 18 and a beam-scan range of 10 . 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
Link To Document :
