SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Popov's radio. View of an early radio set, attributed to the Russian physicist Aleksandr Stepanovich Popov (1859-1906). This photograph was taken on 7 May 1946, the second annual 'Radio Day' in Moscow. Popov had experimented with radio in the early 1890s, and by 1895 was demonstrating the detection of radio waves produced by an oscillator circuit. Although he published a paper describing his receiver in January 1896, it wasn't until reading Marconi's patent of June 1896 that Popov started to design a signal transmitter for sending distinct messages. Popov was, however, the first to use an antenna for transmitting and receiving radio signals.
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