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Gain Units MCQs

Practice Gain Units MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 2
Antenna & Wave PropagationGain Units

Antenna gain expressed in dBd is referenced to a?

  • AHalf-wave dipole
  • BIsotropic radiator
  • CParabolic reflector
  • DQuarter-wave transformer
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Correct Answer: A. Half-wave dipole
Explanation: dBd uses a half-wave dipole as the gain reference.
Reference: Standard antenna and wave propagation: gain units
Question 3
Antenna & Wave PropagationGain Units

A gain of 0 dBd is approximately equal to?

  • A0 dBi
  • B1 dBi
  • C2.15 dBi
  • D3 dBi
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Correct Answer: C. 2.15 dBi
Explanation: An ideal half-wave dipole has approximately 2.15 dBi gain, so 0 dBd≈2.15 dBi.
Reference: Standard antenna and wave propagation: gain units