Patent attributes
A radio transmitter system includes: a transmitter for deriving a carrier frequency modulated by an input; an electrically short antenna system, and a matching network between the transmitter and antenna system. The matching network includes: a primary circuit responsive to the transmitter, a secondary circuit including the antenna system, and magnetic or capacitive coupling between the primary and secondary circuits. The magnetic coupling is an air core transformer having first and second windings respectively included in the primary and secondary circuits. The matching network has a voltage versus frequency response including at least two horns spaced from each other such that the matching network has a pass band approximately equal to the modulation bandwidth.
