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An antenna farm hosting various radio antennas on Sandia Peak near Albuquerque, New Mexico, US. Radio is the technology of communicating using radio waves. [1] [2] [3] Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an ...
A steady stream of inventions pushed radio forward. In 1907, American inventor Lee De Forest introduced his patented Audion signal detector--which allowed radio frequency signals to be amplified ...
Oct 4, 2023 · The radio is an innovation that fundamentally transformed the landscape of communication and entertainment worldwide. Its invention is credited to an Italian electrical engineer, Guglielmo Marconi. Marconi's revolutionary invention opened new avenues for transmitting information across significant distances, significantly shaping the socio-cultural fabric of the 20th century. To know more ...
Radio technology, transmission and detection of communication signals consisting of electromagnetic waves that travel through the air in a straight line or by reflection from the ionosphere or from a communications satellite. Learn more about the history, development, and principles of radio technology in this article.
May 10, 2019 · Edwin Howard Armstrong invented frequency-modulated or FM radio in 1933. FM improved the audio signal of radio by controlling the noise static caused by electrical equipment and the earth's atmosphere. Until 1936, all American transatlantic telephone communication had to be routed through England.
Dec 12, 2014 · The icon indicates free access to the linked research on JSTOR. Guglielmo Marconi (1874-1937) was a mere 27 years old when he successfully made the first transatlantic radio transmission on December 12, 1901. Inspired by the German physicist Heinrich Hertz, who had solidified and proved the theory of electromagnetic waves, Marconi began ...
The Radio Act of 1927 allowed major networks such as CBS and NBC to gain a 70 percent share of U.S. broadcasting by the early 1930s, earning them $72 million in profits by 1934 (McChesney, 1992). At the same time, nonprofit broadcasting fell to only 2 percent of the market (McChesney, 1992).
