DocumentCode
1131008
Title
94 GHz zonal ring reflector for helicopter collision avoidance
Author
Nguyen, B.D. ; Migliaccio, C. ; Pichot, C.
Author_Institution
Lab. d´´Electronique Antennes et Telecommun., Univ. de Nice-Sophia Antipolis, Valbonne, France
Volume
40
Issue
20
fYear
2004
Firstpage
1241
Lastpage
1242
Abstract
A single-layer reflector antenna combining eight and four correcting Fresnel zones is presented. The progressive phase shift is achieved by circular and annular patches. The choice of a quarter-wavelength thickness substrate provides naturally 0 and 180° correcting zones that simplify the reflector design. A prototype of reflector antenna working at 94 GHz has been designed, built and measured. Measurement results show 70% improvement of antenna aperture efficiency compared to the half-wave Fresnel zone plate reflector.
Keywords
aperture antennas; helicopters; reflector antennas; zone plates; 94 GHz; annular patch; antenna aperture efficiency; half wave Fresnel zone plate reflector; helicopter collision avoidance; progressive phase shift; prototype; quarter wavelength thickness substrate; single layer reflector antenna; zonal ring reflector;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20046465
Filename
1342124
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