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Qu'est-ce (qui) est Żórawina radio transmitter - définition
Żórawina radio transmitter
RADIO AND TELEVISION TRANSMITTER NEAR WROCŁAW, POLAND
Transmitter Zorawina; Transmitter Żórawina; Zorawina radio transmitter
The Żórawina radio transmitter is a facility for FM (and previously MW) transmission at Żórawina, south of Wrocław. It was established in 1932 as "Reichssender Breslau" and used as an antenna tower.
transmitter
![Animation of a [[half-wave dipole]] antenna transmitting [[radio waves]], showing the [[electric field]] lines. The antenna in the center is two vertical metal rods, with an alternating current applied at its center from a radio transmitter ''(not shown)''. The voltage charges the two sides of the antenna alternately positive ''<span style="color:red;">(+)</span>'' and negative ''<span style="color:blue;">(−)</span>''. Loops of electric field ''(black lines)'' leave the antenna and travel away at the [[speed of light]]; these are the radio waves. This animation shows the action slowed enormously](https://commons.wikimedia.org/wiki/Special:FilePath/Dipole xmting antenna animation 4 408x318x150ms.gif?width=200 "Animation of a [[half-wave dipole]] antenna transmitting [[radio waves]], showing the [[electric field]] lines. The antenna in the center is two vertical metal rods, with an alternating current applied at its center from a radio transmitter ''(not shown)''. The voltage charges the two sides of the antenna alternately positive ''<span style=\"color:red;\">(+)</span>'' and negative ''<span style=\"color:blue;\">(−)</span>''. Loops of electric field ''(black lines)'' leave the antenna and travel away at the [[speed of light]]; these are the radio waves. This animation shows the action slowed enormously")
![A radio transmitter is usually part of a [[radio communication]] system which uses [[electromagnetic wave]]s ([[radio wave]]s) to transport information (in this case sound) over a distance.](https://commons.wikimedia.org/wiki/Special:FilePath/Signal processing system.png?width=200 "A radio transmitter is usually part of a [[radio communication]] system which uses [[electromagnetic wave]]s ([[radio wave]]s) to transport information (in this case sound) over a distance.")
![[[Guglielmo Marconi]]'s [[spark gap transmitter]], with which he performed the first experiments in practical [[Morse code]] [[radiotelegraphy]] communication in 1895–1897](https://commons.wikimedia.org/wiki/Special:FilePath/Marconi 1897 spark gap transmitter.jpg?width=200 "[[Guglielmo Marconi]]'s [[spark gap transmitter]], with which he performed the first experiments in practical [[Morse code]] [[radiotelegraphy]] communication in 1895–1897")
![High power spark gap [[radiotelegraphy]] transmitter in Australia around 1910.](https://commons.wikimedia.org/wiki/Special:FilePath/Powerful spark gap transmitter.png?width=200 "High power spark gap [[radiotelegraphy]] transmitter in Australia around 1910.")
![1 MW US Navy [[Poulsen arc]] transmitter which generated continuous waves using an electric arc in a magnetic field, a technology used for a brief period from 1903 until vacuum tubes took over in the 20s](https://commons.wikimedia.org/wiki/Special:FilePath/Poulsen arc 1MW transmitter.jpg?width=200 "1 MW US Navy [[Poulsen arc]] transmitter which generated continuous waves using an electric arc in a magnetic field, a technology used for a brief period from 1903 until vacuum tubes took over in the 20s")
![An [[Alexanderson alternator]], a huge rotating machine used as a radio transmitter at very low frequency from about 1910 until World War 2](https://commons.wikimedia.org/wiki/Special:FilePath/Alexanderson Alternator.jpg?width=200 "An [[Alexanderson alternator]], a huge rotating machine used as a radio transmitter at very low frequency from about 1910 until World War 2")
![AM]] radio transmitters, built by [[Lee De Forest]] in 1914. The early [[Audion]] ([[triode]]) tube is visible at right.](https://commons.wikimedia.org/wiki/Special:FilePath/First vacuum tube AM radio transmitter.jpg?width=200 "AM]] radio transmitters, built by [[Lee De Forest]] in 1914. The early [[Audion]] ([[triode]]) tube is visible at right.")
![Armstrong's first experimental FM broadcast transmitter W2XDG, in the [[Empire State Building]], New York City, used for secret tests 1934–1935. It transmitted on 41 MHz at a power of 2 kW.](https://commons.wikimedia.org/wiki/Special:FilePath/Armstrong prototype FM transmitter 1935.jpg?width=200 "Armstrong's first experimental FM broadcast transmitter W2XDG, in the [[Empire State Building]], New York City, used for secret tests 1934–1935. It transmitted on 41 MHz at a power of 2 kW.")
![waveguide]] which conducts them to the dish antenna.](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetron radar assembly 1947.jpg?width=200 "waveguide]] which conducts them to the dish antenna.")
RADIO SIGNAL EMITTING MACHINE
Radio transmitter; XMTR; Transmitters; Radio transmitters; Transmitting; Shortwave transmitter; Short-wave transmitter; Short wave transmitter; Medium wave transmitter; Longwave transmitter; Long-wave transmitter; Long wave transmitter; Transmitter (radio); Transmitter building; Radiotransmitter; Signal radiator; History of radio transmitters; Transmission site; Radio frequency transmitter; Radio freq transmitter
¦ noun
1. a device or installation used to generate and transmit electromagnetic waves carrying messages or signals, especially those of radio or television.
2. short for neurotransmitter.
transmitter
RADIO SIGNAL EMITTING MACHINE
Radio transmitter; XMTR; Transmitters; Radio transmitters; Transmitting; Shortwave transmitter; Short-wave transmitter; Short wave transmitter; Medium wave transmitter; Longwave transmitter; Long-wave transmitter; Long wave transmitter; Transmitter (radio); Transmitter building; Radiotransmitter; Signal radiator; History of radio transmitters; Transmission site; Radio frequency transmitter; Radio freq transmitter
n.
1) a longwave; radar; radio; shortwave transmitter
2) a television, TV transmitter
