Презентация на тему The invention of radio alexander popov

wireless communication, was born as a result of numerous

scientific studies and technical research scientists and engineers.

physicist, inventor of the radio. Convinced connectivity without wires

using electromagnetic waves, Popov built the world's first radio, using its sensor circuit - coherer. During experiments using radio devices Popova was first discovered radio waves reflected from the ships.

Когерер

of the first engaged in the study of electromagnetic

waves teacher officer courses in Kronstadt Alexander Popov. In his radio as parts directly sentient electromagnetic waves, AS Popov used a coherer. What would improve the sensitivity of the device, one of the conclusions Popov coherer is grounded, and the other attached to a piece of wire held high, creating the first receiving antenna.

is necessary to use high-frequency oscillations. To transmit sound

these high-frequency oscillations modulated by a low frequency electrical oscillations. At the receiver, the same of the modulated high-frequency oscillations are allocated low-frequency oscillations. This conversion process is called signal detection.

functional fitness are:
1. Reliability;
2. Stability of admission;

3. Registering long and short signals;
4. Ease and economy of operation;
5. Sufficient sensitivity.

1892-1893 gg. created a powerful transmitter for developed his

system of telegraphy without wires to the Navy of Russia.
System of telegraphy without wires has been repeatedly tested in the spring of 1895 in the garden of mine officer class.

repeating experiments G.Gertsa, Alexander Popov concluded that on the

basis of electromagnetic waves can create a new system of long-distance communication without wires to the Navy of Russia.?
In 1893 in Chicago, opened the World Exhibition. Marine Technical Committee sent Popov to this exhibition as a specialist in the use of electricity.

(24) March 1896

meeting of the physical separation of the Russian Physico-Chemical

Society (RFHO) April 25, 1895
At this meeting he conducted the world's first radio communication with the transmission and reception of long and short signals - Morse code elements - and their fixation call receiver.
The figure shows the world's first radio that Popov demonstrated at a meeting of the physical separation RFHO April 25 (May 7) 1895

invention of radio in an article published in the

journal «The Electrician» (December, 1897).
The figure shows the holograph sketch Popov receiving device? Which he demonstrated during the report of 12 March 1896

"Heinrich Hertz" 12 (24) March 1896.

Tsarevich for the invention of telegraphy without wires, November

30, 1898

islands Kutsalo Popov and Hogland (telephone receiver Popov, which

obtained Russian privilege, as well as French and English patents (upper left image, on the radio on. Hogland (lower left picture))

but under Russian law may be regarded as the

inventor, since revealed the essence of your device for a wide range of people to play with sufficient detail.
Important question that arises in the ensuing discussion, the priority - the kind of device invented Popov: receiver or system radiosignalizatsii.

was highly appreciated by the Board of Ministers -

Government of the Russian Federation dated 11 May 1993 for the number 434 "On the preparation and conduct of the 100th anniversary of the invention of radio ." The resolution notes the leading role of this event in modern civilization , and the priority of the Russian scientist , Professor Popov .
This anniversary date was included in the UNESCO calendar of anniversaries and events. Under the auspices of 5-7 May 1995 in Moscow International Anniversary Conference dedicated to the 100th anniversary of the invention of radio .

them . Popov in St. Petersburg V.K.Marchenkov in the

journal " Telecommunications " on the basis of archival documents and layouts substantiated list of inventions Popov :
- A system of telegraphy without wires , radio system , in May 1895 ; ? - Instrument meteorological purposes " razryadootmetchik Popov - storm indicator ", June 1895 ; ? - Phone radio, November 1899 ; ? - Self-healing phone coherer , January 1900 ; ? - Spark radio system (with docent S.Ya.Livshitsem ) , January 1903

pioneered radio using a balloon .
In May 1899 tested

a radio communication system between the Kronstadt forts .
During recent tests , they found on the radio " detection effect" coherer capable of receiving information "by ear " on the telephone headset.
After a thorough investigation , AS Popov has developed three options for receiving coherers telegraph signals to the headphones .
AS for this invention Popov filed a patent application , indicating therein that the receiver is based on the " detection effect" coherer open P.N.Rybkinym and D.S.Troitskim .

telephone, tape recorders, computers, MP3 players,. Kv.i VHF transmitter

systems.
From the old technology of radio parts and products. Modern base elements can assemble products in weight. In dimensions. At some times to reduce the dimensions of the product and also reduce power consumption. What gives you the opportunity to make products cost-effectively.