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Antenna & Wave PropagationDirectivity & Gain

Antenna directivity is the ratio of radiation intensity in a specified direction to?

  • AAverage radiation intensity over all directions
  • BInput current only
  • COhmic resistance
  • DWavelength squared only
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Correct Answer: A. Average radiation intensity over all directions
Explanation: Directivity compares radiation intensity in a given direction, usually its maximum, with the average radiation intensity.
Reference: Standard antenna and wave propagation: directivity & gain
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