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Transmitter - traduction vers espagnol
![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.")
Ex: Many of them use a technique called packet-switching in which data are sent from transmitter to receiver in small bundles or packets.
transmisor
Définition
Wikipédia
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves.
Transmitters are necessary component parts of all electronic devices that communicate by radio, such as radio and television broadcasting stations, cell phones, walkie-talkies, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term transmitter is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitters, even though they often have similar circuits.
The term is popularly used more specifically to refer to a broadcast transmitter, a transmitter used in broadcasting, as in FM radio transmitter or television transmitter. This usage typically includes both the transmitter proper, the antenna, and often the building it is housed in.
