Fortune Telling Collection - Zodiac Analysis - What is the difference between ka band and ku band in satellite communication?
What is the difference between ka band and ku band in satellite communication?
2. Different from Ku band, the United States allocated a special Ka frequency for government applications, which enabled the government to establish its own satellite constellation system. The famous broadband global communication satellite communication system (WGS) is the product of this policy.
3. The limitation of 3.Ka band is different from that of Ku band. Although Ka-band can obtain better directivity and gain under the condition of fixed antenna size, it is offset by higher space loss. In addition, for commercial Ka-band, the off-axis EIRP spectral density (ESD) is more strictly limited, which is very important for mobile application systems.
Ka-band extended data satellite system is not a simple clone of Ku system. Ku-band satellites usually use regional beams covering the whole continent or a specific ocean (such as Intelsat, EUTELSAT, TELSAT, etc.). ) and is specially designed for transmitting TV programs.
Although some Ka-beam are designed in this way, most of the new Ka-band satellites use spot beams to cover a certain area, or use the frequency reuse technology (Viasat- 1, Inmarsat-5 Global Xpress) to use movable spot beams through multipoint beams. The difference of system architecture leads to the difference of satellite performance and available spectrum resources.
Baidu encyclopedia -KA band
Baidu encyclopedia -KU band
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