Spectrum Allocation

Radio waves

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• 3KHz -> 1GHz
• low frequency range
• omni-directional antennae
• example: FM Radio, TV, ...

Micro waves

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• 1GHz -> 40GHz
• medium to high frequency range
• omni-directional in medium range, phased antennae for high frequencies
• example: WiFi
  • 2.4 GHz -> unlicensed ISM (Industrial Scientific Medical) band
  • 5 GHz -> licensed

Infrared

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• example: TV Remote, wireless keyboard and mouse, ...