magnetron

magnetron
/mag"ni tron'/, n. Electronics.
a two-element vacuum tube in which the flow of electrons is under the influence of an external magnetic field, used to generate extremely short radio waves.
[1920-25; MAGNE(TO)- + -TRON]

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      diode vacuum tube consisting of a cylindrical (straight wire) cathode and a coaxial anode, between which a dc (direct current) potential creates an electric field. A magnetic field is applied longitudinally by an external magnet. Connected to a resonant line, it can act as an oscillator. Magnetrons are capable of generating extremely high frequencies and also short bursts of very high power. They are an important source of power in radar systems and in microwave ovens.

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Universalium. 2010.

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Look at other dictionaries:

  • Magnetron — Magnétron Magnétron Magnétron …   Wikipédia en Français

  • Magnétron — Magnétron …   Wikipédia en Français

  • magnetron — MAGNETRÓN, magnetroane, s.n. Tub electronic (folosit în special ca generator de oscilaţii de înaltă frecvenţă) în care intensitatea curentului de electroni este comandată printr un câmp magnetic exterior. – Din fr. magnétron. Trimis de claudia,… …   Dicționar Român

  • magnétron — [ maɲetrɔ̃ ] n. m. • 1921; de magné(to ) et (cyclo)tron ♦ Électron. Tube électronique à vide du type diode, soumis à un champ d induction magnétique et utilisé comme oscillateur et amplificateur de puissance en hyperfréquence. ● magnétron nom… …   Encyclopédie Universelle

  • magnetron — mag ne*tron, n. a diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • magnetrón — Fuente de energía de microondas utilizada en los aceleradores lineales de uso médico para acelerar los electrones hasta energías terapéuticas. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • magnétron — s. m. [Eletrônica] Válvula eletrónica , usada para gerar ondas eletromagnética muito curtas. • [Brasil] Plural: magnétrones ou magnétrons.   ‣ Etimologia: magnete + [ele]trão   ♦ Grafia em Portugal: magnetrão …   Dicionário da Língua Portuguesa

  • magnetron — mȁgnetrōn m <G magnetróna> DEFINICIJA fiz. elektronska cijev koja proizvodi visoko frekventne mikrovalne oscilacije, koristi se kao izvor signala kod radara ETIMOLOGIJA magnet + v. {{(elekt)ron>> …   Hrvatski jezični portal

  • magnetrón — m. Electr. Tubo electrónico de forma cilíndrica en el que los electrones producidos por un cátodo caliente en el eje son acelerados por un campo eléctrico radial y a la vez sometidos a la acción de un campo magnético axial, generándose microondas …   Diccionario de la lengua española

  • magnetron — [mag′nə trän΄] n. [ MAGNE(T) + (ELEC)TRON] an electron tube in which the flow of electrons from the cathode to one or more anodes is controlled by an externally applied magnetic field: used to generate alternating currents at microwave… …   English World dictionary

  • Magnetron — Das Magnetron ist eine Vakuum Laufzeitröhre zur Erzeugung von elektromagnetischer Strahlung im Mikrowellenbereich (ca. 0,3 bis 300 GHz). Magnetrone haben einen Wirkungsgrad von bis zu 80 % und sind somit sehr effiziente, preiswerte… …   Deutsch Wikipedia

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