Title :
Reducing crosspolarization of an offset reflector antenna using a dual-mode horn feed
Author :
Pour, Z. Allahgholi ; Shafai, L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Manitoba, Winnipeg, MB
Abstract :
The effect of a dual-mode circular horn antenna, as a feed in offset reflector antennas, on the crosspolarization field is studied using the physical optics, geometrical optics, and geometrical theory of diffraction software GRASP. It will be shown that, one can reduce the crosspolarization of an offset reflector antenna by properly exciting two modes in circular horn antenna. These two modes are the fundamental mode, TE11, and the higher order mode, TE21. The results for some offset reflectors, with different f/D ratios, will be presented to investigate the above property.
Keywords :
electromagnetic wave polarisation; geometrical optics; geometrical theory of diffraction; horn antennas; offset reflector antennas; physical optics; reflector antenna feeds; crosspolarization field; dual-mode circular horn feed; geometrical optics; geometrical theory-of-diffraction software GRASP; offset reflector antenna; physical optics; Antenna arrays; Antenna feeds; Apertures; Current distribution; Geometry; Horn antennas; Paper technology; Phased arrays; Power generation; Reflector antennas; Reflector antennas; crosspolarization; multimode horn;
Conference_Titel :
Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-2979-0
Electronic_ISBN :
978-1-4244-2980-6
DOI :
10.1109/ANTEMURSI.2009.4805041
