EXOSAT is a satellite for scientific observations, it is equipped with instrumente for measuring x-ray radiation in space. The instruments will be aligned by orientating the whole satellite towards the x-ray source concerned. An omnidirectional antenna system is therefore essential for communication with earth. The antenna system for EXOSAT has been developed and manufactured by LM Ericsson. The system consists of two antennas, each of which radiates over more than half a sphere. The antenna elements are cone-shaped spirals. Each antenna consists of four spirals with associated feeding device. In this article the design of the antenna elements and the optimizing of their position on the satellite are described, as well as the extensive measurements of performance that have been carried out using LM Ericcson's new automatic antenna measurement equipment.
Antenna system for the EXOSAT satellite
Antennensystem fuer den Satelliten EXOSAT
Ericsson Review ; 57 , 4 ; 156-159
1980
4 Seiten, 8 Bilder
Article (Journal)
English
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