Title :
Quarter-sphere Luneburg lens scanning antenna
Author :
Nikolic, Nasiha ; James, Graeme L. ; Hellicar, Andrew ; Greene, Kieran
Author_Institution :
CSIRO ICT Centre, Epping, NSW, Australia
Abstract :
Scanning properties of a quarter-sphere Luneburg lens with two backing ground planes are evaluated. The main beam of the antenna is scanned by rotating the feed antenna, as in a full or a hemispherical lens antennas. Since only one quarter of the lens is used the weight of the antenna is halved compared to a hemispherical lens. This reduction is achieved at the expense of the scanning range of the antenna. Simulated results for a small quarter-sphere two-layer lens operating at 20 GHz are presented, showing that scanning loss of less than 0.5 dB may be achieved in the range of ±50° in the azimuth plane and ±25° in the elevation plane.
Keywords :
antenna feeds; lens antennas; microwave antennas; scanning antennas; antenna scanning range; backing ground planes; feed antenna; frequency 20 GHz; hemispherical lens antenna; quarter-sphere Luneburg lens scanning antenna; quarter-sphere two-layer lens; scanning properties; Antenna feeds; Antenna radiation patterns; Apertures; Electric fields; Lenses; Luneburg lens; quarter-lens; scanning antenna; spherical lens;
Conference_Titel :
Antenna Technology and Applied Electromagnetics (ANTEM), 2012 15th International Symposium on
Conference_Location :
Toulouse
Print_ISBN :
978-1-4673-0290-6
DOI :
10.1109/ANTEM.2012.6262330
