Steered-beam satellite communication system

Details Steered-beam satellite communication system Steered-beam satellite communication system

H - Electricity

04

B

325/14

H04B 7/185 (2006.01) H01Q 3/22 (2006.01) H04B 7/204 (2006.01)

Patent

CA 1242487

ABSTRACT OF THE DISCLOSURE A satellite communication system employing a satellite in a geostationary orbit about the earth for communicating with ground stations disposed along a region of the earth positioned along an arc of a great circle of the earth. The satellite carries a frequency- scanning antenna array oriented for scanning a beam of electromagnetic radiation in one plane aligned with the arc of the great circle. Each position of the beam is formed with a different frequency of the radiation. The operating frequency of each ground station is selected to match the frequency of a beam directed from the satellite to the ground station. An antenna assembly formed of two confocal parabolic reflectors provides for a multiplication of the effective aperture of an array of radiating elements of the antenna, and also for a demagnification of a scan angle of radiation emanating from the array of radiating elements.

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