Giphy

History of Radio

By Yung CB

  • A Theory Is Made

    A Theory Is Made
    James Clerk Maxwell showed in theoretical and mathematical form in 1864 that electromagnetic waves could propagate through free space.

  • A Theory Nearly Proved

    A Theory Nearly Proved
    The first intentional transmission of a signal by means of electromagnetic waves was performed in an experiment by David Edward Hughes around 1880.

  • Theory Is Proven!

    Theory Is Proven!
    In 1888 Heinrich Rudolf Hertz was able to conclusively prove transmitted airborne electromagnetic waves in an experiment confirming Maxwell's theory of electromagnetism.

  • First Voice Across Radio

    First Voice Across Radio
    In 1900, Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for a distance of approximately a half mile.

  • Invention Of AM Radio

    Invention Of AM Radio
    The invention of amplitude-modulated (AM) radio, so that more than one station can send signals (as opposed to spark-gap radio, where one transmitter covers the entire bandwidth of the spectrum). This invention was made by Reginald Fessenden.

  • The Man Of FM Radio

    The Man Of FM Radio
    Inventor Edwin Howard Armstrong is credited with developing many of the features of radio as it is known today. Armstrong patented three important inventions that made today's radio possible. Regeneration, the superheterodyne circuit and wide-band frequency modulation or FM.