A composite C/S band feed for TVRO

Author

Pal, S. ; Lakshmeesha, V.K. ; Srinivasan, V.V. ; Mahadevan, V. ; Nicholas, L.

Author_Institution

ISRO Satellite Centre, Bangalore, India

fYear

1991

fDate

24-28 June 1991

Firstpage

1603

Abstract

The authors describe the development of a composite feed for S- & C-band TV reception from satellites. The specific application is significant in the Indian context where INSAT has TV transmission both at S-band and in C-band frequences. The main advantage of the composite feed stems from the fact that it halves the inventory of reflector dishes. For S-band it works in circular polarization having an N-type interface, and for C-band it has flexibility to have any polarization with the help of a dielectric plate polarizer with a waveguide interface. A very compact circular to rectangular transition has been developed for this purpose. The development has also been engineered to have a simple fabrication process. The whole unit has been qualified from both electrical and mechanical specification considerations and has been put into operation.<>

Keywords

antenna feeders; direct broadcasting by satellite; reflector antennas; television antennas; television receivers; C-band; INSAT; N-type interface; S-band; TV reception; circular polarization; compact circular to rectangular transition; composite antenna feed; dielectric plate polarizer; reflector antenna feed; satellite TV; simple fabrication process; waveguide interface; Apertures; Feeds; Frequency; Lighting; Planar waveguides; Polarization; Rectangular waveguides; Reflector antennas; Testing; Waveguide transitions;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.175162

Filename

175162