A circularly polarised frequency scanning antenna for space applications

Author

Shelley, M.W. ; Mason, A.G. ; Brain, D.J.

Author_Institution

ERA Technol. Ltd., Leatherhead, UK

fYear

1994

fDate

34463

Firstpage

42370

Lastpage

42375

Abstract

There is considerable interest in developing antenna systems which can provide a multi-beam capability without very complex, bulky and potentially unreliable beamforming networks. Future systems supporting mobile communications networks may be relocated from L-Band to Ka-Band, where several GHz of un-used spectrum are available. ERA Technology has been developing frequency scanning antenna technology in order to define its limitations when applied to a Ka-Band space-borne high gain antenna system. A linearly polarised offset parabolic reflector antenna fed using a pair of frequency scanning waveguide slot arrays has been constructed and evaluated. Further development to redesign the array feed for circular polarisation is nearing completion

Keywords

antenna feeders; electromagnetic wave polarisation; frequency allocation; microwave antenna arrays; mobile radio systems; reflector antennas; satellite antennas; scanning antennas; slot antennas; Ka-Band; circular polarisation; feed; frequency scanning antenna; high gain antenna system; mobile communications networks; multi-beam capability; offset parabolic reflector antenna; satellite communications; waveguide slot arrays;

fLanguage

English

Publisher

iet

Conference_Titel

Spacecraft Antennas, IEE/SEE Seminar on

Conference_Location

London

Type

conf

Filename

352203