Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Cavity_magnetron> ?p ?o }
- Cavity_magnetron abstract "The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities (cavity resonators). Bunches of electrons passing by the openings to the cavities excite radio wave oscillations in the cavity, much as a guitar's strings excite sound in its sound box. The frequency of the microwaves produced, the resonant frequency, is determined by the cavities' physical dimensions. Unlike other microwave tubes, such as the klystron and traveling-wave tube (TWT), the magnetron cannot function as an amplifier, increasing the power of an applied microwave signal, it serves solely as an oscillator, generating a microwave signal from direct current power supplied to the tube.The first form of magnetron tube, the split-anode magnetron, was invented by Albert Hull in 1920, but it wasn't capable of high frequencies and was little used. Similar devices were experimented with by many teams through the 1920s and 30s. On November 27, 1935, Hans Erich Hollmann applied for a patent for the first multiple cavities magnetron, which he received on July 12, 1938, but the more stable klystron was preferred for most German radars during World War II. The cavity magnetron tube was later improved by John Randall and Harry Boot in 1940 at the University of Birmingham, England. The high power of pulses from their device made centimeter-band radar practical for the Allies of World War II, with shorter wavelength radars allowing detection of smaller objects from smaller antennas. The compact cavity magnetron tube drastically reduced the size of radar sets so that they could be installed in anti-submarine aircraft and escort ships.In the post-war era the magnetron became less widely used in the radar role. This was because the magnetron's output changes from pulse to pulse, both in frequency and phase. This makes the signal unsuitable for pulse-to-pulse comparisons, which is widely used for detecting and removing "clutter" from the radar display. The magnetron remains in use in some radars, but has become much more common as a low-cost microwave source for microwave ovens. In this form, approximately one billion magnetrons are in use today.".
- Cavity_magnetron thumbnail Magnetron2.jpg?width=300.
- Cavity_magnetron wikiPageExternalLink index.htm.
- Cavity_magnetron wikiPageExternalLink Magnetron.en.html.
- Cavity_magnetron wikiPageExternalLink radar-10.htm.
- Cavity_magnetron wikiPageExternalLink index.asp.
- Cavity_magnetron wikiPageExternalLink list.php?L=-M&M=Y&H=Magnetrons.
- Cavity_magnetron wikiPageID "20861".
- Cavity_magnetron wikiPageLength "39442".
- Cavity_magnetron wikiPageOutDegree "145".
- Cavity_magnetron wikiPageRevisionID "679948969".
- Cavity_magnetron wikiPageWikiLink Alan_Blumlein.
- Cavity_magnetron wikiPageWikiLink Albert_Hull.
- Cavity_magnetron wikiPageWikiLink Albert_W._Hull.
- Cavity_magnetron wikiPageWikiLink Allies_of_World_War_II.
- Cavity_magnetron wikiPageWikiLink Amplifier.
- Cavity_magnetron wikiPageWikiLink Anode.
- Cavity_magnetron wikiPageWikiLink Antenna_(electronics).
- Cavity_magnetron wikiPageWikiLink Antenna_(radio).
- Cavity_magnetron wikiPageWikiLink Bell_Labs.
- Cavity_magnetron wikiPageWikiLink Bell_Telephone_Laboratories.
- Cavity_magnetron wikiPageWikiLink Berlin.
- Cavity_magnetron wikiPageWikiLink Bernard_Lovell.
- Cavity_magnetron wikiPageWikiLink Berylliosis.
- Cavity_magnetron wikiPageWikiLink Beryllium_oxide.
- Cavity_magnetron wikiPageWikiLink Capacitor.
- Cavity_magnetron wikiPageWikiLink Cataract.
- Cavity_magnetron wikiPageWikiLink Category:Electrical_components.
- Cavity_magnetron wikiPageWikiLink Category:English_inventions.
- Cavity_magnetron wikiPageWikiLink Category:Microwave_technology.
- Cavity_magnetron wikiPageWikiLink Category:Radar.
- Cavity_magnetron wikiPageWikiLink Category:Vacuum_tubes.
- Cavity_magnetron wikiPageWikiLink Category:World_War_II_American_electronics.
- Cavity_magnetron wikiPageWikiLink Category:World_War_II_British_electronics.
- Cavity_magnetron wikiPageWikiLink Cathode.
- Cavity_magnetron wikiPageWikiLink Cavity_resonator.
- Cavity_magnetron wikiPageWikiLink Charles_University.
- Cavity_magnetron wikiPageWikiLink Charles_University_in_Prague.
- Cavity_magnetron wikiPageWikiLink Clutter_(radar).
- Cavity_magnetron wikiPageWikiLink Colts_Manufacturing_Company.
- Cavity_magnetron wikiPageWikiLink Continuous-wave_radar.
- Cavity_magnetron wikiPageWikiLink Control_grid.
- Cavity_magnetron wikiPageWikiLink Crossed-field_amplifier.
- Cavity_magnetron wikiPageWikiLink Cyclotron_radiation.
- Cavity_magnetron wikiPageWikiLink Diode.
- Cavity_magnetron wikiPageWikiLink Directed-energy_weapon.
- Cavity_magnetron wikiPageWikiLink Electromagnet.
- Cavity_magnetron wikiPageWikiLink Electron.
- Cavity_magnetron wikiPageWikiLink Electron_mass.
- Cavity_magnetron wikiPageWikiLink Electron_rest_mass.
- Cavity_magnetron wikiPageWikiLink Electronic_oscillator.
- Cavity_magnetron wikiPageWikiLink Electrons.
- Cavity_magnetron wikiPageWikiLink Federal_government_of_the_United_States.
- Cavity_magnetron wikiPageWikiLink Flemings_left-hand_rule_for_motors.
- Cavity_magnetron wikiPageWikiLink France.
- Cavity_magnetron wikiPageWikiLink Frequency.
- Cavity_magnetron wikiPageWikiLink General_Electric.
- Cavity_magnetron wikiPageWikiLink General_Electric_Company_plc.
- Cavity_magnetron wikiPageWikiLink Germany.
- Cavity_magnetron wikiPageWikiLink H2S_(radar).
- Cavity_magnetron wikiPageWikiLink H2S_radar.
- Cavity_magnetron wikiPageWikiLink Hans_Hollmann.
- Cavity_magnetron wikiPageWikiLink Harry_Boot.
- Cavity_magnetron wikiPageWikiLink Heinrich_Greinacher.
- Cavity_magnetron wikiPageWikiLink Henry_Tizard.
- Cavity_magnetron wikiPageWikiLink High_frequency.
- Cavity_magnetron wikiPageWikiLink History_of_radar.
- Cavity_magnetron wikiPageWikiLink Horseshoe_magnet.
- Cavity_magnetron wikiPageWikiLink Human_eye.
- Cavity_magnetron wikiPageWikiLink Hysteresis.
- Cavity_magnetron wikiPageWikiLink Incandescent_light_bulb.
- Cavity_magnetron wikiPageWikiLink Inductor.
- Cavity_magnetron wikiPageWikiLink International_Agency_for_Research_on_Cancer.
- Cavity_magnetron wikiPageWikiLink Japan.
- Cavity_magnetron wikiPageWikiLink John_Randall_(physicist).
- Cavity_magnetron wikiPageWikiLink Kilowatt.
- Cavity_magnetron wikiPageWikiLink Klystron.
- Cavity_magnetron wikiPageWikiLink Lee_De_Forest.
- Cavity_magnetron wikiPageWikiLink Lee_de_Forest.
- Cavity_magnetron wikiPageWikiLink Left-hand_rule.
- Cavity_magnetron wikiPageWikiLink Lens_(anatomy).
- Cavity_magnetron wikiPageWikiLink Lens_(vision).
- Cavity_magnetron wikiPageWikiLink London.
- Cavity_magnetron wikiPageWikiLink Lorentz_force.
- Cavity_magnetron wikiPageWikiLink Magnet.
- Cavity_magnetron wikiPageWikiLink Magnetic_field.
- Cavity_magnetron wikiPageWikiLink Maser.
- Cavity_magnetron wikiPageWikiLink Massachusetts_Institute_of_Technology.
- Cavity_magnetron wikiPageWikiLink Microwave.
- Cavity_magnetron wikiPageWikiLink Microwave_EMP_Rifle.
- Cavity_magnetron wikiPageWikiLink Microwave_oven.
- Cavity_magnetron wikiPageWikiLink Nazi.
- Cavity_magnetron wikiPageWikiLink Nazism.
- Cavity_magnetron wikiPageWikiLink Night_fighter.
- Cavity_magnetron wikiPageWikiLink Permanent_magnet.
- Cavity_magnetron wikiPageWikiLink Phased_array.
- Cavity_magnetron wikiPageWikiLink Proximity_fuze.
- Cavity_magnetron wikiPageWikiLink Radar.
- Cavity_magnetron wikiPageWikiLink Radiation_Laboratory.
- Cavity_magnetron wikiPageWikiLink Radiation_Laboratory_(MIT).