Title :
An array lens for circular polarization with emphasis on aperture efficiency
Author :
Phillion, Rudi H. ; Okoniewski, Michal
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada
Abstract :
An antenna consisting of a horn and a large flat lens is presented. The lens is composed of an array of 349 circularly-polarized elements. Each element creates a phase shift that not only compensates for the spatial delay between the horn and the lens, but also directs the major lobe away from broadside. The maximum aperture efficiency is measured to be 48% at 12.9 GHz. The side-lobe and cross-polarization levels are both below −20 dB.
Keywords :
Antenna arrays; Antenna feeds; Aperture antennas; Frequency selective surfaces; Lenses; Phased arrays; Polarization; Power engineering and energy; Prototypes; Reflector antennas;
Conference_Titel :
Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on
Conference_Location :
Barcelona, Spain
Print_ISBN :
978-1-4244-6431-9
Electronic_ISBN :
978-84-7653-472-4
