page_title: Cavity magnetron
hierarchical_section_title: Cavity magnetron
caption_attribution_description: Magnetron in its box Deutsch: Magnetron eines Mikrowellenherdes. Unten aus dem Blechgehäuse weiß isoliert herausgeführt: 2 Anschlüsse für Heiz- und Anodenapannung. 4 gewellte Alu-Lamellen, über den Kupferzylinder gepresst, geben Abwärme an die Kühlluft ab. Oberhalb und unterhalb je ein schwarzer Ferrit-Magnetring. Goldfärbig: Dichtung aus Drahtgewirke an den Hohlleiter. Rosa Keramik (elektrisch nichtleitend und daher Strahlungsdurchlässig) und Metallkappe bilden die Antenne, die im Hohlleiter steckt, der zum Garraum führt. English: Magnetron with magnet in its mounting box - the horizontal aluminium plates aid in cooling the device by airflow from a fan Suomi: Erääntyyppinen mikroaaltouunin magnetroni Polski: Magnetron wraz z magnesami z kuchenki mikrofalowej Русский: Магнетрон в корпусе
context_page_description: The cavity magnetron is a high-powered vacuum tube that makes microwaves using the interaction of a stream of electrons with a magnetic field. Electrons pass by holes, and the resonance creates microwaves, like blowing air on a flute creates sound of a certain pitch. The 'resonant' cavity magnetron type of the earlier magnetron tube was invented by John Randall and Harry Boot in 1940. The high power of pulses from the cavity magnetron made centimetre-band radar practical. Shorter wavelength radars allowed the finding of smaller objects. The small cavity magnetron tube made the size of radar sets much smaller so that they could be put into in aircraft and ships used to find submarines. At present, cavity magnetrons are commonly used in microwave ovens and in various radar applications.
context_section_description: The cavity magnetron is a high-powered vacuum tube that makes microwaves using the interaction of a stream of electrons with a magnetic field. Electrons pass by holes (cavities), and the resonance creates microwaves, like blowing air on a flute creates sound (sound waves) of a certain pitch. The 'resonant' cavity magnetron type of the earlier magnetron tube was invented by John Randall and Harry Boot in 1940. The high power of pulses from the cavity magnetron made centimetre-band radar practical. Shorter wavelength  radars allowed the finding of smaller objects. The small cavity magnetron tube made the size of radar sets much smaller so that they could be put into in aircraft and ships used to find submarines. At present, cavity magnetrons are commonly used in microwave ovens and in various radar applications.
caption: Complete microwave oven magnetron, with magnet and heatsink
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