Dual Offset Multibeam Antennas for Satellite Applications

Marco Terada


This paper describes the preliminary results of an investigation on dual offset multibeam reflector configurations for satellite applications. The main goal is to design a configuration capable to cover the entire earth disk with multiple high-gain beams at fixed angular directions (e.g., 0.8o apart), as seen from a geostationary satellite. Furthermore, it is desirable to employ a feed array in which each element generates only one beam (i.e., "passive`` feed array), thus reducing the complexity and size of the feeding network. Preliminary results show the possibility of achieving such a performance, although further investigation is required. In especial, shaping of the reflectors must be considered in future stages of the investigation, thus producing a dual shaped offset reflector illuminated by a passive feed array ("hybrid`` reflector antenna).

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