MCQ Practice Question Antenna & Wave PropagationGain Units A gain of 0 dBd is approximately equal to? A0 dBi B1 dBi C2.15 dBi D3 dBi Show AnswerHide AnswerReport an error 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