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Passive gain vs. active gain
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Passive Gain

  • Accomplished by focusing the RF signal with the use of an antenna.
  • Does not require an external power source
  • Internal workings of the antenna focus the signal more powerfully in one direction than another.

Active Gain

  • Caused by the transceiver, capable of transmitting at different power levels.
  • Use of an amplifier connected on the wire between the transceiver and antenna.
  • Amplifiers are typically bidirectional. They increase AC voltage inbound and outbound.

Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.

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