mobile phone technology history

Radio has played a role in world politics and strategy since its invention ... In the same year Navy radio proved its usefulness in a national emergency ... Aug 3, 2023 ... He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. When waves created by the sparks of the coil ... Jan 4, 2024 ... Many reliable sources suggest that inventor and radio-pioneer Reginald Fessenden played a violin solo of the popular Christmas Carol 'O Holy Night' as the ... Oct 30, 2020 ... In 1920, employees of inventor and industrialist George Westinghouse hit upon an idea to boost radio sales by providing programming that ... May 26, 2020 ... Lamarr's path to inventing the cornerstone of Wi-Fi began when she heard about the Navy's difficulties with radio-controlled torpedoes. Edwin Armstrong invented Frequency Modulation radio (FM radio) in 1933, but his employer, RCA, ignored and even boycotted the invention. FM radio vastly ... Jun 28, 2023 ... The background ripples detected by NANOGrav could help scientists better understand how gravitational waves are created and what happens to them ... Feb 25, 2016 ... Fessenden also developed a more effective way of sending Morse code than Guglielmo Marconi, the original inventor. This was a few years before ... NIHF Inductee Guglielmo Marconi invented the radio by building equipment to transmit electrical signals through the air from one end of his house to the ... Mar 13, 2023 ... Back then, I was only into electronic – and especially Techno and industrial – music, which was impossible to find on the dial in Greece. When I ...