Guglielmo Marconi's antenna (1901) Marconi's first transmitter,consisting of a copper sheet capacitive antenna(top)connected to a Righi spark gap (left)powered by an induction coil (center)with a telegraph key(right)to switch it on and off to spell out text messages in Morse code.Marconi's first transmitter, consisting of a copper sheet capacitive antenna (top) connected to a Righi spark gap (left) powered by an induction coil (center) with a telegraph key (right) to switch it on and off to spell out text messages in Morse code. Guglielmo Marconi’s antenna (1901)