Communications
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Communications
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Principle of Communications Satellites


Earth
  • Long-distance calls or TV programs travel by radio or along cables to the satellite ground station.

  • The signals are amplified and beamed from a parabola antenna into space.
  • The satellite receives the signal, amplifies it again and sends it back to the appropriate ground station.
  • The signals are again amplified and sent by radio or along cables
  • 
    
    Satellite Dish
    © Dish Network
    Used by permission
    With a "dish" connected to their TV set, people can pick up signals directly from a satellite and receive more channels: this is satellite television.
    
    
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