History of the Radio

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James Clerk Maxwell

He predicted the existence of radio waves. It was on this basis that radio waves were discovered and Einstein's theory of relativity took off. Image Courtesy: reich-chemistry.wikispaces.com

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James Clerk Maxwell
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Nathan Stubblefield

It is thought that Stubblefield invented the radio before Tesla or Marconi. However, his devices appear to have worked by audio frequency induction or audio frequency earth conduction rather than radio frequency radiation for radio transmission telecommunication. It is claimed that he is the inventor of wireless telephony or wireless transmission of the human voice. Image Courtesy: ditwww.epfl.ch

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Nathan Stubblefield
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Mahlon Loomis

He is called the "First Wireless Telegrapher". In 1868, he demonstrated a wireless communication system between two sites 14 to 18 miles apart. Image Courtesy: www.sciencephoto.com

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Mahlon Loomis
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Amos Dolbear

He was a professor at Tufts University and received a U.S. patent for a wireless telegraph in March, 1882. Image Courtesy: 2.bp.blogspot.com

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Amos Dolbear
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Heinrich Hertz

He was a German physicist and mechanician. In 1888, he became the first person to prove the presence of electromagnetic waves by constructing a system to create and detect UHF radio waves. His name was used for radio frequencies. The hertz designation was an official part of the international metric system in 1933. Image Courtesy: explow.com

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Heinrich Hertz
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Sir Oliver Lodge

He designed a device called a 'coherer' up to perfection. This was a radio wave detector and the basis of the early radiotelegraph receiver. He was showered with international recognition as he became the first human to transmit a radio signal. Image Courtesy: upload.wikimedia.org

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Sir Oliver Lodge
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Alexander Popov

He constructed his first radio receiver in 1894. This was then modified as a lightning detector and demonstrated before the Russian Physical and Chemical Society on May 7, 1895. This day is remembered by the Russian Federation as "Radio Day". Image Courtesy: 2.bp.blogspot.com.jpg

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Alexander Popov
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Nikola Tesla

In 1892, he designed the fundamental design for radio. Later, in 1898, a radio controlled robot-boat was patented. This boat was controlled by radio waves and shown in the Electrical Exhibition in Madison Square Garden. Image Courtesy: www.freeinfosociety.com

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Nikola Tesla
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Guglielmo Marconi

He was an Italian inventor who demonstrated the practicability of radio communication. His first radio signal was sent and received in 1895. In 1899, the first wireless signal was sent across the English Channel. In 1902, the letter 'S' was telegraphed from England to Newfoundland. This was the first triumphant transatlantic radiotelegraph. Image Courtesy: discaircraft.greyfalcon.us

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Guglielmo Marconi
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Reginald Fessenden

He was a Canadian inventor reputed for his achievements in early radio. The first audio transmission by radio in 1900, the first two-way transatlantic radio transmission in 1906 and the first radio broadcast of entertainment and music in 1906 were his three significant milestones. Image Courtesy: www.corbisimages.com

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Reginald Fessenden
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