Title: 21 GHz band Direct Broadcasting Satellite System
Abstract: Satellite broadcasting in the 21-GHz band is expected to broadcast wide-band programs such as Super Hi-Vision, which is ultra-high-definition with more than 4000 scanning lines. The 21-GHz band, however, suffers from about three times heavier rain attenuation in terms of decibels than the 12-GHz band. This paper describes a mitigation technique using onboard array-fed reflector antennas that can boost the radiation power only in the areas with heavy rainfall, while maintaining a constant level of radiation power in the rest of the service area. Examples of antenna gain for such radiation patterns are shown. The transmission power and the power consumption for the two types of onboard phased array antenna are compared.
Publication Year: 2007
Publication Date: 2007-01-30
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 11
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