802.11 in the 2.4 GHz and 5 GHz Unlicensed Bands

5-*

• The 2.4 GHz Unlicensed Band

  • Defined the same in almost all countries (2.400 GHz to 2.485 GHz)
  • This sameness reduces radio costs
  • Propagation characteristics are good
  • For 20 MHz 802.11 channels, only three nonoverlapping channels are possible
    • Channels 1, 6, and 11

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