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Antenna & Wave PropagationDipole Antennas

The approximate input resistance of a thin resonant half-wave dipole in free space at its center is?

  • A36.5 ohm
  • B50 ohm
  • C73 ohm
  • D377 ohm
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Correct Answer: C. 73 ohm
Explanation: A thin center-fed resonant half-wave dipole in free space has an input resistance of approximately 73 ohm, with small reactance near resonance.
Reference: Standard antenna and wave propagation: dipole antennas
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