Title :
A novel semi-active multibeam antenna concept
Author :
Roederer, A. ; Sabbadini, M.
Author_Institution :
Eur. Space Agency, Noordwijk, Netherlands
Abstract :
A multimatrix semiactive antenna has been selected for the ESA project SAT-2 for communications with mobiles at 1.5/1.6 GHz. In a typical configuration, six fixed beams cover western Europe, while movable beams can be used for the rest of the coverage. Each beam uses three feeds: one feed is shared between adjacent fixed beams, and one or two between adjacent movable beam positions. A global beam can also be generated. A possible configuration for the front-end to be associated with 5.5-in offset reflector is shown. Computed isodirectivity contours are presented.<>
Keywords :
antenna feeders; antenna radiation patterns; mobile radio systems; reflector antennas; satellite antennas; 1.5 GHz; 1.6 GHz; 5.5 m; ESA project SAT-2; UHF; antenna feeders; front-end; global beam; isodirectivity contours; mobile satellite communication; multimatrix semiactive antenna; offset reflector; western Europe; Antenna feeds; Artificial satellites; Butler matrix; Fluctuations; Frequency; Interference; Mobile communication; Optical coupling; Power amplifiers; Satellite antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115502
