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Science

Wireless signals

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Wireless communication is convenient. It is used for radio programmes, mobile phones and computer networks. Digital signals are less affected by interference than analogue signals.

Uses of wireless technology

Electromagnetic radiation can be used for wireless communications. For example:

  • radio waves are used to transmit television and radio programmes
  • microwaves are used to transmit mobile phone calls

Radio stations with similar transmission frequencies can interfere with each other’s signals.

Microwaves are also used to network computers together, especially laptop computers.

Wireless communications can be available all of the time, almost anywhere. They have several advantages over wired communications. These include:

  • no wires need to be run through buildings, over ground or underground
  • wireless devices can be portable

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