Multiple beam EHF antenna/receiver configuration for unified satellite communications uplink coverage

Uplink coverage through high gain directive beams is a key spacecraft technology for EHF satellite communication systems which serve users employing small, low-cost terminals. Coverage of multiple areas on the earth is provided through multiple uplink antenna beams. A unified antenna/receiver structure is described which provides flexible uplink coverage for these multiple areas through a single antenna aperture. In this approach, a multiple beam antenna is used with beam selection and additional beam forming done at IF. The coverage provided by this system, the reliability of the system, and the weight and power impact of the system are discussed.