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The cavity magnetron is a high-power vacuum tube used in early radar systems and subsequently in microwave ovens and in linear particle accelerators. A cavity magnetron generates microwaves using the interaction of a stream of electrons with a magnetic field, while moving past a series of cavity resonators, which are small, open cavities in a ...
The cavity magnetron developed by John Randall and Harry Boot in 1940 at the University of Birmingham, England. The invention of the cavity magnetron made possible the production of electromagnetic waves of a small enough wavelength . The cavity magnetron was a crucial component in the development of short wavelength radar during World War II. [8]
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A microwave cavity or radio frequency cavity (RF cavity) is a special type of resonator, consisting of a closed (or largely closed) metal structure that confines electromagnetic fields in the microwave or RF region of the spectrum. The structure is either hollow or filled with dielectric material. The microwaves bounce back and forth between ...
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This was developed by John Randall (1905-1984) and Harry Boot (1917-1983) at Birmingham University. Radars that could produce clear images of distant objects played a decisive role in World War II, by bouncing powerful, ultra-short radio waves off their targets. The cavity magnetron was the first practical device for producing such waves.
In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...
After the invention of the cavity magnetron in early 1940, all of the British forces began development of radars using the system, which generated microwaves at around 10 cm wavelength. Among these were the Air Ministry teams who had developed both AI and ASV, and had now turned their attention to AIS and ASVS, the S standing for "senitmetric ...