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Guglielmo Marconi
this Italian creator spent most of his working life in England where he introduced many of the first uses of wireless telegraphy to European navies. His radio apparatus is widely considered to be the reason thatover 700 people survived the Titanic disaster in 1912 instead of dying as they likely would have if ships at sea were still using carrier pigeons to communicate over great distances.this Italian creator spent most of his working life in England where he introduced many of the first -
Edwin Armstrong
This WWI Army officer, Columbia University engineering professor, and creator of FM radio invented the regenerative circuit, the first amplifying receiver and reliable continuous-wave transmitter; and the superheterodyne circuit, a means of receiving, converting and amplifying weak, high-frequency electromagnetic waves. His inventions are considered by many to providethe foundation for cellular phones. -
Henirich Hertz
The first person to prove you that you could send and recieve electric waves wirelessly.
Died at age 37 of blood poisoning. -
Nikola Tesla
Tesla was a Serbian-American inventor who discovered the basis for most alternating-current machinery. In 1884, after coming to the United States he sold the patent rights for his system of alternating-current dynamos, transformers, and motors to George Westinghouse. Among tons of other things he invented he has invented the Tesla Coil a coil very common in radios. -
Lee DeForest
Credited with being the “father of Ameri- can radio.” DeForest was a direct competitor to Marconi at the turn of the century (1899), when he was the chief scien- tist at the U.S.’s first radio firm American Wireless Telephone and Telegraph until Marconi took over the company’s assets in 1912 after a series of financial scandals. Although he held 300 patents, DeForest’s greatest techno- logical contribution is considered to be his 1906 “Audion” vacuum tube. -
Ernst Alexanderson
Born in Sweden, this remarkable inventor developed the first alternator to make transmission of speech possible. -
Reginald Fessenden
This Canadian spent much of his working life in the U.S. where he developed a way to combine sound and radio carrier waves. His first effort to transmit this mixed signal to a receiver where the carrier wave would be removed and the listener could hear the original sound, failed. However, in 1906, using Alexanderson’s Alternator, Fessenden made the first long- range transmission of voice from Brant Rock, MA.
