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Antenna & Wave PropagationEIRP

A transmitting antenna has 6 dBi gain and is fed with 10 W. Ignoring feeder loss, its EIRP is approximately?

  • A10 W
  • B20 W
  • C40 W
  • D60 W
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Correct Answer: C. 40 W
Explanation: 6 dBi corresponds to a power gain of about 4, so EIRP≈10×4=40 W.
Reference: Standard antenna and wave propagation: eirp
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