Patent ID: 6476761
Filing Date: 2002-11-05
Classification: H01Q

Abstract:
A send or receive antenna for a telecommunication system using non-geosynchronous satellites,said antenna being intended to form a set of fixed beams on the ground extending over a total angle of view from 60 to 120Â°, said antenna including: an array of radiating elements, scanned electronically to form beams corresponding to various terrestrial areas; and a domed divergent lens for enlarging the aperture of the beams created by said array of radiating elements said divergent lens including a plurality of metal waveguides with various lengths, the greatest length being that on an axis of said lens, and the length being shorter for waveguides far away from said axis, so that said divergent lens produces a gain that is at a minimum on said axis and at a maximum at a periphery of said lens.