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  • Who Invented the Radio?

    Radio was not invented by any single person, but instead was a culmination of several scientists’ research, each of whom pioneered a different area of electromagnetic radiation and radio waves during the late 1800s and early 1900s. Among these men are well known researchers such as Heinrich Rudolf Hertz, James Clerk Maxwell, David E. Hughes, Thomas Edison, and Nikola Tesla.

    The Role of James Clerk Maxwell

    James Clerk MaxwellIn order to fully understand the invention of radio, we must go back to an earlier point in time when electromagnetism was first discovered. This takes us to James Clerk Maxwell and his research during the 1860s. During this time, he was proposing many theories for theoretical physics, including various aspects of gases and quantum mechanics. However, as important as all of his theories are in these other areas – he also predicted something that would become the foundation for all research in radio that was to come. He theorized that electromagnetic waves could be manipulated into a medium of transmission of sound.

    Contributions by Lesser-Known Scientists

    Nearly ten years later, another major milestone was made. While not directly related to radio, Mahon Loomis was able to transmit the world’s first wireless telegraph – proving that Maxwell’s theory of using electromagnetic waves as a method of transmission of information was indeed possible. It would not be long before the wireless telegraph would be replaced by actual voice communication via a radio.

    Also during the 1870s, David Edward Hughes made a massive leap forward in radio technology by creating the first method of induction transmission. This induction transmission technique allowed Morse code to be received and transmitted using what would later be known as radio waves.

    The Role of Hertz and Edison

    Thomas Edison
    With so much pioneering going on in America and Europe by lesser known (at the time) scientists, it was only a matter of time before some of the bigger names in the industry would begin to become involved in the radio revolution. Among them were Thomas Edison and Heinrich Hertz, two of the most important inventors of the time. In the late 1880s, Edison began to work on using a vibrating magnet as the transmitter and receiver for Hughes’ induction transmission technique. Edison’s work came to fruition a few years later when he was able to install a wireless signaling system for a local railroad.

    Meanwhile, while Edison was working on the practical aspects of radio, Heinrich Hertz was working on the theoretical aspects behind this new form of transmission. He began experimenting with radio waves and various other types of electromagnetism and finally published his findings in 1887.

    Heinrich Hertz

    The Role of Tesla

    The 1890s turned out to be a big decade for the invention of radio as more and more inventors and scientists began to join in. In the early 1890s, Nikola Tesla, renowned opponent to Edison, was granted several patents for major advancements in radio technology, including generators to produce radio signals and radio frequency (RF) power supplies.

    As the 1890s marched on, Alexander Popov created the first radio signal detector and receiver in Russia, basing all of his ideas on the previous work of others in the radio field. While the receiver was extremely crude and basic, it did its job and paved the way for many future radios.

    In 1901, Tesla decided it was time to transmit radio across the Atlantic Ocean, so he planned to build what would be known as Wardenclyffe Tower. Despite the possibilities for such an invention, Tesla received little financial support – and the project was shut down.

    The Role of Abrose and De Forest

    Around the same time, John Ambrose Fleming and Lee De Forest made major advancements in the creation of vacuum tubes and diodes, essentially paving the way for the first home based radio receivers that could actually be affordable and useful for everyday people. In time, the adoption of radios gradually increased before, during and after World War I. Finally, in 1922, the BBC went out over the radio waves for the first time, thereby solidifying the radio as an important means for the transmission of information.

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    1. Tom Jamieson

      16 August, 2013 at 1:35 pm

      I love history of any kind — I always find where things come from and who invented them fascinating. Thanks for sharing this post.

    2. Vroom-X

      7 July, 2013 at 12:30 am

      Where do you guys leave J.C Bose many of you should find out who actually pioneer wireless communication.

    3. sampan

      1 June, 2011 at 10:59 pm

      J.C.BOSE(1998 ieee publication)

    4. pswdb

      29 June, 2010 at 9:31 pm

      Tesla filed his own basic radio patent applications in Sept. 1897. They were granted in 1900. Marconi’s first patent application in America, filed on November 10, 1900, was turned down. Marconi’s revised applications over the next three years were repeatedly rejected because of the priority of Tesla and other inventors.

      The Patent Office made the following comment in 1903:

      “Many of the claims are not patentable over Tesla patent numbers 645,576 and 649,621, of record, the amendment to overcome said references as well as Marconi’s pretended ignorance of the nature of a “Tesla oscillator” (a.k.a. Tesla Coil) being little short of absurd… the term “Tesla oscillator” has become a household word on both continents [Europe and North America].” [in other words, Marconi lied.]

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