What is the function of a loading coil in an electrically short antenna?
To increase the SWR bandwidth by increasing net reactance
To lower the losses
To lower the Q
To resonate the antenna by cancelling the capacitive reactance✓Bonne réponse
Explication
An antenna shorter than resonance presents a resistance in series with capacitive reactance. An inductor whose reactance equals that capacitive reactance cancels it, leaving a purely resistive feed point the transmitter can drive.