Lockheed Martin Corporation

Jim Wang

Sudhakar K Rao

David K Brown

Chih-Chien Hsu

Minh Tang

Stephen R Peck

Mysore Sheshadri

David M Brown

An antenna assembly includes a reflector having a focal plane, a first feed element located along the focal plane that illuminates the reflector to create a first contour beam at a first frequency and a second feed element located further from the reflector than the first feed element that illuminates the reflector to create a first spot beam at a second frequency, the second frequency being different than the first frequency.

Common aperture antenna for multiple contoured beams and multiple spot beams

An antenna system for generating and configuring at least one defocused beam is provided. The antenna system includes a reflector having a focal plane and a non-parabolic curvature for forming the at least one defocused beam, and a plurality of feed antennas that illuminate the reflector. Each feed antenna is disposed in the focal plane of the reflector. The antenna system further includes at least one incoming signal dividing network that divides at least one incoming signal into a plurality of sub-signals, each corresponding to one of the feed antennas, a plurality of variable phase shifters, each receiving one of the sub-signals from the incoming signal dividing network and phase shifting the sub-signal to generate a corresponding phase-shifted sub-signal, and a plurality of fixed-amplitude amplifiers, at least one corresponding to each of the feed antennas. The at least one amplifier for each feed antenna amplifies the corresponding phase-shifted sub-signal to generate an amplified phase-shifted sub-signal which is provided to the corresponding feed antenna.

Reconfigurable payload using non-focused reflector antenna for HIEO and GEO satellites

Antenna system and methodology for producing multiple interleaved beams using a hybrid frequency-reuse scheme. In particular, depending on the traffic demand in specific coverage areas, some beams are assigned with frequency channels in accordance with a 4-cell frequency-reuse scheme, and the other beams are assigned with frequency channels in accordance with a 7-cell frequency-reuse scheme. The antenna system has multiple feeds divided into clusters, and a number of reflectors fed by respective feed clusters and configured to form one beam for each of the feeds.

Multiple-beam antenna system using hybrid frequency-reuse scheme

Growing community of inventors

Churchville, PA, United States of America

Jim Wang