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Marconi, Guglielmo, Marchese

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Marconi, Guglielmo, Marchese (glyĕl`mō märkā`zā märkô`nē), 1874–1937, Italian physicist, celebrated for his development of wireless telegraphy (see radio radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially to the radio receiver.
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). In the field of electromagnetic waves he correlated and improved inventions of H. R. Hertz Hertz, Heinrich Rudolf (Ger. hīn`rĭkh r
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, Édouard Branly, and other scientists and invented a practical antenna. Experimenting with homemade apparatus, in 1895 he sent long-wave signals over a distance of more than a mile. He patented his system in England (1896) and organized a wireless telegraph company (1897) to develop its commercial applications. In 1899 he transmitted signals across the English Channel and in 1901 received in St. John's, N.L., the first transatlantic wireless signals, sent from his station at Poldhu, Cornwall. After World War I he concentrated on short waves, and c.1930 turned his attention to microwaves. He received, jointly with K. F. Braun Braun, Karl Ferdinand (fĕr`dēnänt' broun), 1850–1918, German physicist. Braun taught at the Univ.
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, the 1909 Nobel Prize in Physics for work in wireless telegraphy.

Bibliography

See biographies by his daughter, D. P. Marconi (1962), D. Gunston (1965), and W. P. Jolly (1972).



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