Evolution of Radio

By George Garler

  • James Clerk Maxwell

    James Clerk Maxwell
    "James Clerk Maxwell predicts the existence of electromagnetic waves in his paper 'A Dynamical Theory of the Electromagnetic Field'".

  • Nikola Tesla

    Nikola Tesla
    "Nikola Tesla wirelessly transmitted electromagnetic energy. He made the first public demonstration of radio in St. Louis in 1893".

  • Guglielmo Marconi

    Guglielmo Marconi
    Duplicating Hertz’s experiments in his own home, he successfully sent transmissions from one side of his attic to the other. Despite the indifference of the Italian Government, “Marconi moved to England and took out a patent on his device”.

  • Transatlantic Signals

    Transatlantic Signals
    "First transatlantic signal sent-by Marconi from Ireland to Canada".

  • Nova Scotia

    Nova Scotia
    "The Marconi Station in Glace Bay, Nova Scotia, Canada, transmits the first signal from North America back to Great Britain".

  • Poldhu Wireless Station

    Poldhu Wireless Station
    "Marconi starts conducting more organized and documented tests sailing on board the SS Philadelphia west from Great Britain recording signals sent daily from the Poldhu Station, showing reception up to 2100 miles (3400 km)".

  • Reginald Fessenden

    Reginald Fessenden
    "In 1906, Massachusetts resident Reginald Fessenden initiated the first radio transmission of the human voice, but his efforts did not develop into a useful application".

  • Beginning of the World War I

    Beginning of the World War I
    "All U.S. radio stations not needed by the government are closed as WWI begins".

  • NBC

    NBC
    "The first permanent national network, NBC, was formed".

  • FM Radio

    FM Radio
    "FM radio was patented; Edwin H. Armstrong invented it. FM uses frequency modulation of the radio wave to minimize static and interference from electrical equipment and the atmosphere, in the audio program".

  • Celular Radio Telephony

    Celular Radio Telephony
    "Cellular radio telephony, with call handoff and frequency reuse, was conceived at Bell Laboratories".

  • Texas Instruments

    Texas Instruments
    "Texas Instruments produces the first commercial transistor radio, launching the portable electronic age".

  • Late 1990's

    Late 1990's
    "The digital transmissions began to be applied to broadcasting".

  • Sirius Satellite Radio

    Sirius Satellite Radio
    "Headquartered in New York City, with smaller studios in Los Angeles and Memphis, Sirius was officially launched on July 1, 2002. It now provides 69 streams (channels) of music and 65 streams of sports, news and entertainment to its subscribers".