Hors
10-03-2009, 06:33 PM
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The invention of radio is one of the greatest discoveries in the history of engineering. It is based on the work of many scientists and researchers.
In 1886 German scientist Heinrich Hertz for the first time proved experimentally the fact of radiation of electro*magnetic waves and studied their propagation.
Hertz's experiments attracted the attention of the talented experimenting physicist Alexander S.Popov (1859-1906), a teacher at Russia's leading educational and re*search institution in the field of electrical engineering-the of*ficers' mine school in Kronstadt. Popov repeated Hertz's ex*periments and in 1890 demonstrated them in his public lec*tures.
On the basis of the research conducted by leading physicists of his time and his own experiments, Popov in 1895 invented a «device for detecting and registering electric oscillations», which became the first type of radio receiver in wireless telegraphy.
For a signal transmitter Popov used a Hertzian oscillator fed from a Ruhmkorff coil.
Popov invented a classical model of receiver which was later used in the first-generation radio communications equipment of all companies of the world of various designs.
His first receiver was demonstrated publicly in operatioft at a session of the Russian Physical and Chemical Society in Petersburg on April 25, 1895. The information about it was published in 1896 in the first issue of the journal of the Rus*sian Physical and Chemical Society.
Later Guglielmo Marconi in 1897 used a receiving de*vice based on Popov's invention and installed a transmitting antenna adjusted for resonance with the receiving antenna which made it possible to put wireless telegraphy on a practi*cal footing.
The first receiver together with other instruments made by Popov in November 1927 was handed over to the Central Museum of Communications, where it is kept at present.
The invention of radio is one of the greatest discoveries in the history of engineering. It is based on the work of many scientists and researchers.
In 1886 German scientist Heinrich Hertz for the first time proved experimentally the fact of radiation of electro*magnetic waves and studied their propagation.
Hertz's experiments attracted the attention of the talented experimenting physicist Alexander S.Popov (1859-1906), a teacher at Russia's leading educational and re*search institution in the field of electrical engineering-the of*ficers' mine school in Kronstadt. Popov repeated Hertz's ex*periments and in 1890 demonstrated them in his public lec*tures.
On the basis of the research conducted by leading physicists of his time and his own experiments, Popov in 1895 invented a «device for detecting and registering electric oscillations», which became the first type of radio receiver in wireless telegraphy.
For a signal transmitter Popov used a Hertzian oscillator fed from a Ruhmkorff coil.
Popov invented a classical model of receiver which was later used in the first-generation radio communications equipment of all companies of the world of various designs.
His first receiver was demonstrated publicly in operatioft at a session of the Russian Physical and Chemical Society in Petersburg on April 25, 1895. The information about it was published in 1896 in the first issue of the journal of the Rus*sian Physical and Chemical Society.
Later Guglielmo Marconi in 1897 used a receiving de*vice based on Popov's invention and installed a transmitting antenna adjusted for resonance with the receiving antenna which made it possible to put wireless telegraphy on a practi*cal footing.
The first receiver together with other instruments made by Popov in November 1927 was handed over to the Central Museum of Communications, where it is kept at present.