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 ...

Jul 2, 2018 · The cavity magnetron was invented in England under wartime pressures. When Germany attacked Poland in September 1939, English scientists had already installed a coastal radar system called Chain Home to detect incoming flights of German bombers.

Aug 28, 2023 · 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...

Apr 11, 2022 · A brief history of magnetrons. Photo: The CV64 cavity magnetron, developed in Birmingham in 1942, was small enough to fit inside an airplane. Devices like this made it possible for planes to use radar defenses for the first time. An exhibit at Think Tank (the science museum in Birmingham, England).

Oct 31, 2018 · The Germans learned that the British were using the cavity magnetron for radar in February 1943, when they examined a downed bomber near Rotterdam. An explosive charge meant to destroy the radar ...

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. [ 1 ]

The resonant cavity magnetron design used the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavity resonators.

It is a common belief by many people that the resonant-cavity magnetron was invented in February 1940 by Randall and Boot from Birmingham University. In reality, this is not the full story.

Cross-section of a cavity magnetron. Fig. 6 shows the construction of a typical cavity magnetron, which follows the original experimental model of Randall and Boot remarkably closely. The output is extracted by a small loop feeding a coaxial cable or waveguide.

Dec 7, 2024 · The most common rendition is a cavity magnetron. It’s essentially a copper cylinder with a central hole that’s surrounded by a series of bored chambers, likened to those in a revolver. In fact, early models were based on a Colt pistol design.