| 释义 |
magnetron Electronics.|ˈmægnɪtrɒn|
[f. magnetic a. + -tron]
A diode with a cylindrical anode surrounding a coaxial cathode in which the flow of electrons is controlled by a magnetic field applied parallel to the axis, and now usu. designed to produce microwave pulses of high power.
1924Sci. Monthly XVIII. 650 As the negatively charged grid cuts off the current of the three-element tube, so an external magnetic field will also do it in the two-element tube... Such a device, called a magnetron, was shown. 1945Times 15 Aug. 2/1 In July 1940, Professor J. T. Randall, of Birmingham, produced a magnetron which was the first high-power generator of centimetric waves in the world. The magnetron remains the heart of every modern Radar equipment. 1958Engineering 7 Feb. 174/3 The machine [sc. a linear accelerator] is of the travelling-wave type, using radio-frequency power generated by a magnetron valve operating at a frequency of 3,000 Mc/s. 1971New Scientist 1 Apr. 36/1 Outred is developing microwave cavity sources using very high-powered (kilowatts) magnetrons for the infrared spectroscopy programme. |