History of Radio

By davischa

  • Discovery of Hertzian Waves

    Discovery of Hertzian Waves
    Discovered by Heinrich Rudolf Hertz

  • The first complete wireless telegraphy system is built

    The first complete wireless telegraphy system is built
    Built by Italian inventor Guglielmo Macaroni; based on Hertzian Waves.

  • First Radio Broadcast

    First Radio Broadcast
    Reginald Fessenden used a synchronous rotary spark transmitter for the first AM radio broadcast.

  • First purpose-built radio factory opens

    First purpose-built radio factory opens
    Opened by Guglielmo Macaroni

  • First radio news program

    Broadcast from Detroit, Michigan.

  • First single sideband and frequency modulation

    Invented by amateur radio operators

  • Beginning of mobile telephone service

    Commercialized by AT&T

  • Invention of first Transistorized radio

    Invented by Sony, a newly formed company at the time

  • Colorized TV is broadcast commercially

    Not all broadcasts were in color

  • LORAN is the premier radio navigation system

  • GPS launches

    The U.S. Navy experimented with this new technology

  • A software defined radio is constructed

    Launched by the U.S. Army and DARPA

  • Stations stream between 64 and 128 kbit/s

    Near CD Quality