Antenna system for an x-band satellite earth terminal

T. S. Bird*, M. A. Sprey, K. J. Greene, G. L. James

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The reflector-optics and feed system of an 11 m diameter earth-station antenna that operates in circular polarization at X-band is described. The reflector-optics are required to have high G/T, sidelobes that satisfy the CCIR recommendation and low mismatch at the feed due to the subreflector. The feed system is required to have high isolation between the transmit and receive ports (> 40 dB) at the centre of the band. This isolation is achieved by minimizing reflections from all components forward of the polarizer. As well as meeting the high-isolation requirement, the feed system has an insertion loss < 0.15 dB and an axial ratio < 0.5 dB. A feed system was constructed and tested and some results are described.

Original languageEnglish
Pages (from-to)27-30
Number of pages4
JournalNational Conference Publication - Institution of Engineers, Australia
Issue number94 /7
Publication statusPublished - 1994
Externally publishedYes


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