Magnetron definition

măgnĭ-trŏn
Frequency:
A microwave tube in which electrons generated from a heated cathode are affected by magnetic and electric fields in such a way as to produce microwave radiation used in radar and in microwave ovens.
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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 frequencies.
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An electron tube that produces coherent microwave radiation. Magnetrons are diodes in which the electrons traveling to the anode are set in spiraling paths by a magnetic field created by permanent magnets. The circular component of the electrons' motion causes microwave-frequency oscillations in the voltage induced in resonating cavities built into the anode, which is connected to an antenna that emits the microwaves. Magnetrons are used in radar and in microwave ovens.
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(physics) A device in which electrons are made to resonate in a specially shaped chamber and thus produce microwave radiation; used in radar, and in microwave ovens.
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Other Word Forms

Noun

Singular:
magnetron
Plural:
magnetrons

Origin of magnetron

  • magne(t) –tron

    From American Heritage Dictionary of the English Language, 5th Edition