Communications
Revolution 		Communications
Networks 		Optical
Fibres 		Photonic
Devices 		Future of
Communications 		Credits

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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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