Title :
Semi-active hybrid antennas for satellites
Author :
Roederer, A.G. ; Iversen, P.O. ; Stirland, S.J. ; Webster, P.J.
Author_Institution :
ESA-ESTEC, Noordwijk, Netherlands
Abstract :
The potential of semi-active multimatrix reflector antennas for mobile and fixed communications is confirmed by investigations on beam scanning by phase-only optimisation at the amplifier input level, and reflector shaping in the interests of smaller hybrid matrices. An application to 20/30 GHz regional VSAT communications is presented, and differences from low-frequency global systems are highlighted in L-band and S-band designs
Keywords :
active antennas; microwave antennas; reflector antennas; satellite antennas; scanning antennas; 20 GHz; 30 GHz; L-band; S-band; SHF; beam scanning; fixed communications; hybrid antennas; hybrid matrices; phase-only optimisation; reflector shaping; regional VSAT communications; satellites; semi-active multimatrix reflector antennas;
Conference_Titel :
Hybrid Antennas, IEE Colloquium on
Conference_Location :
London
