Evolution of Radio

Evolution of Radio

Introduction

The radio includes three components: sound recording, transmission and reception. The first practical, yet purely mechanical developed by Thomas Alva Edison with his 1877 presented. The technical rescission of acoustic sound waves into electrical impulses for the first time succeeded in the second half of the 19th Century with the invention of the first microphones including by Philip Rice and Alexander Graham Bell. The transfer began the invention of the magnetic phone ahead. There are many parallel developers and inventor, the most extensive solution comes from Alexander Graham Bell in 1876. The first telephone set but still requires a wire as a conductor (Smith, Gervelis, 2003). The wireless radio is based on the discovery of electromagnetic waves by Heinrich Hertz. In 1886 Guglielmo Marconi, this discovery has transferred to the transmission of telegraphic messages: In 1897, he succeeded in a wireless transmission over a distance of five kilometers, in 1901, he radioed the Atlantic. Resulting from the use of wireless telegraphy has been extended findings. Particular importance was given to the development of the tube station. The technical fundamentals of broadcasting were in the late 19 Century by Nikola Tesla invented and patented. However in 1895 a fire destroyed his plant ready. The invention of the radio is often attributed to Guglielmo Marconi (Smith, Gervelis, 2003).

In fact, presented on 7 May 1895 Alexander Popov, the first time this technology in the State University of Saint Petersburg. On 24 March 1896, submitted its experimental design, the words "Heinrich Hertz" to a remote receiving station 250 meters. For this pioneering work was honored at the Paris Popov Electro technical Congress in 1900 (Macario, 1996). In the public consciousness, however, then and later, Marconi was still considered the inventor of the radio, because he had patented a similar structured experiment in June 1896 and his early reach the spectacular wireless telegraphy connections across the English Channel (1899) and (1901) across the Atlantic - the latter due to technical improvements in the form of Ferdinand Braun developed inductively coupled antenna circuit. Marconi and Braun received these services for 1909 Nobel Prize for physics. Later, the East-West conflict was also in 1906 for ignoring the deceased Russian inventor Alexander Popov in the west. On Christmas Eve 1906 was Reginald Fessenden of the new station for wireless telegraphy in Brant Rock, Massachusetts, the first radio broadcast. There had been led by Fessenden, some scientists gathered for an experiment. After describing Fessendens he began with a short speech, it was followed by "Phonograph Music" (Handel's Largo). After Fessenden played a violin solo, and that the composition of " O Holy Night "by Adolphe Adam , which ends with the words: "Staunet and be silent." Fessenden sang a verse and played this violin. "Then came the Bible text, Glory to God in the Highest '. We concluded therefore that we provide them; Merry Christmas' wish and told them that we were planning to send on New Year's Eve again" (Macario, ...