Active atmospheric fade compensation for spacecraft antennas

Author

Kalatizadeh, Y. ; Philippou, G.Y. ; Brain, D.J. ; Crone, G. ; Poiares Baptista, J.P.V. ; Paraboni, A.

Author_Institution

ERA Technol., Leatherhead, UK

Volume

2

fYear

1995

fDate

4-7 Apr 1995

Firstpage

395

Abstract

Various atmospheric conditions cause attenuation in the signal received from broadcast satellites. The total attenuation consists of losses due to cloud, atmospheric scintillation, oxygen absorption, water vapour and rain. The rain attenuation is usually the most important one of these and at 22 GHz can produce fade margins of up to 20 dB with considerable and comparatively rapid geographical and temporal variation. It is, therefore, important to try to compensate for fading due to atmospheric effects to achieve a better power flux density over the satellite coverage area. The practical implementation of such compensation for the Italian high definition TV transmission is described

Keywords

electromagnetic wave absorption; 22 GHz; HDTV; Italy; SHF; active atmospheric fade compensation; atmospheric conditions; atmospheric effects; atmospheric scintillation; broadcast satellites; cloud; fade margins; geographical variation; high definition TV transmission; losses; oxygen absorption; power flux density; rain attenuation; satellite coverage area; signal attenuation; spacecraft antennas; temporal variation; water vapour;

fLanguage

English

Publisher

iet

Conference_Titel

Antennas and Propagation, 1995., Ninth International Conference on (Conf. Publ. No. 407)

Conference_Location

Eindhoven

Print_ISBN

0-85296-637-7

Type

conf

DOI

10.1049/cp:19950457

Filename

640115