How are Microwaves produced?

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Solution

Microwaves are produced by vacuum tubes devices that operate on the ballistic motion of electron controlled by magnetic or electric fields. They work in the density modulated mode, instead of current modulated mode, meaning that they work on the basis of clumps of electrons flying ballistically through them, instead of using a constant flow of electrons. Lower power microwaves can me produced by some solid state devices such as the FET (field effect transistor), the tunnel diode, the gunn diode, and the IMPATT diode.

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