MCQ Practice Question Antenna & Wave PropagationGain Units Antenna gain expressed in dBd is referenced to a? AHalf-wave dipole BIsotropic radiator CParabolic reflector DQuarter-wave transformer Show AnswerHide AnswerReport an error 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