Antenna system for low-earth-orbit satellites

摘要

The present invention regards an antenna system (1;5) comprising a reflection system that comprises a reflector (11;52) having a rotational symmetry with respect to an axis of symmetry (12;54). Moreover, the antenna system (1;5) also comprises an electronically steerable planar radiating array (13;53) that is arranged in a focal region (14;55) of the reflection system, has a rotational symmetry with respect to the axis of symmetry (12;54) and is operable to radiate a primary radiofrequency beam oriented in a predefined direction of illumination with respect to the axis of symmetry (12;54) in such a way as to cause a specific region of the reflector (11;52) to be illuminated by said primary radiofrequency beam. Said specific region of the reflector (11;52) is designed, when illuminated by said primary radiofrequency beam, to generate by reflection a secondary radiofrequency beam oriented in at least one predefined direction of transmission with respect to the axis of symmetry (12;54).