Portrait of Aleksandr Stepanovich Popov (1859- 1906), Russian physicist and radio pioneer. Popov was born the son of a priest, and was educated in a seminary. His interest soon turned to physics, which he studied at St. Petersburg University. It was after joining the Navy's Torpedo School at Kronstadt that he started experiments with radio. In 1895 his radio receiver detected signals produced by an oscillator circuit. But it was only after reading Marconi's patent of 1896 that Popov made a radio transmitter. Popov was, however, the first to use an antenna for transmitting and receiving radio signals.
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