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Multiplexing - Space Division


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A2

Passing multiple communication streams down a single cable, fibre or radio link.

Use the Properties of Space to Separate Signals

Examples

  1. Transmit two radio signals on the same frequency. One uses a horizontally polarised antenna. The other uses vertical polarisation. At the receiver, a similar pair of antennas separates the two signals. Satellite TV uses exactly this method to double the transmission capacity from each satellite. Note the tiny vertical and horizontal antennas in the Low Noise Block (LNB) below.
     
    Satellite LNB
     
  2. Use very directional antennas. Multiple communications links can use the same frequencies because the energy is accurately beamed to the correct destination.

 

 

 

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