Active atmospheric fade compensation for spacecraft antennas
Active atmospheric fade compensation for spacecraft antennas
- Author(s):
- DOI: 10.1049/cp:19950457
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- Author(s): Source: Ninth International Conference on Antennas and Propagation (ICAP), 1995 page ()
- Conference: Ninth International Conference on Antennas and Propagation (ICAP)
- DOI: 10.1049/cp:19950457
- ISBN: 0 85296 637 7
- Location: Eindhoven, Netherlands
- Conference date: 4-7 April 1995
- Format: PDF
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. (5 pages)
Inspec keywords: rain; television broadcasting; electromagnetic wave absorption; satellite antennas; tropospheric electromagnetic wave propagation; high definition television; microwave propagation
Subjects: Radio and television broadcasting; Satellite communication systems; High definition television and video; Radiowave propagation; Antennas
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