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The power radiated by an antenna divided by the square of the rms current at its terminals defines

  • A.its effective aperture
  • B.its radiation resistance
  • C.its input reactance
  • D.its directive gain

Answer: B

It is a fictitious resistance in the sense that it dissipates nothing as heat, yet it absorbs power from the source exactly as a real resistance would. A short dipole has a small radiation resistance, which is why matching to it is difficult.

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