Development of radios

By CarlyA
  • Period: to

    Discovery of electromagnetism, electrodynamics, and radio waves.

    . In 1820, scientists like Hans Christen Oersted, a Danish chemist and physicist who discovered that electric currents make magnetic fields, and Micheal Faraday, an English chemist and physicist who contributed to the study of electrochemistry and electromagnetism. This is the foundation of radios. In the 1860s, Scottish physicist and mathematician James Clerk Maxwell theorized the existence of electromagnetic – or radio – waves, and with it, the foundations of radio communication.
  • The existence of radio waves

    The existence of radio waves

    Heinrich Hertz demonstrated the existence of radio waves. This led to practical application of them and changed communication.
  • Morse Code

    Morse Code

    -Italian inventor Guglielmo Marconi sent morse code over the Atlantic, proving wireless technology is possible.
  • The First Broadcast

    The First Broadcast

    Reginald Fessenden makes the first audio broadcast in Brant Rock, Massachusetts by using an Alexanderson alternator and a rotary spark-gap transmitter. This is believed to be the start of the AM radio.
  • Antennas

    Antennas

    • Charles David Herrold constructs a broadcast station in San Jose, California. He experiments with it by using omnidirectional antennas and places them on multiple rooftops. These experiments work.
  • World War 1

    World War 1

    The British Army during World War 1 created portable radio sets that were inconspicuous and were wireless. They also had improved range and reliability
  • Entertainment Broadcast

    Entertainment Broadcast

    a Dutch engineer makes the first regular entertainment broadcast from his home. The program becomes popular and is broadcasted four nights a week for the next 5 years. Entertainment broadcasts eventually reach other parts of the world.
  • First Radio Station

    First Radio Station

    This is the first year when music was on the radio because of the world's first radio station.
  • Period: to

    The Golden Age of radios

    The 1930s and 1940s are known to be the peak of radio entertainment. First, it played a major role in informing the public about recent World War 2 events. News broadcasts became more structured, and entertainment diversified, from comedy shows to detective dramas. Advertisers also realized the importance of radio, leading to the first sponsored programs and jingles.
  • FM Radio

    FM Radio

    Edwin H. Armstrong patents FM radio. The frequency modulation allows static and interference from electrical equipment to be reduced, resulting in clearer sound. The first experimental radio station to use it was W1XOJ.
  • First Internet Radio Program

    First Internet Radio Program

    Carl Malamud creates "Internet Talk Radio," the first internet radio program. As time goes on, music programs become popular, and sound quality continues to increase. Without this technology, music streaming sites like Pandora wouldn't exist.