Klystron operation is based on the principle of?

By Raj Vimal|Updated : October 19th, 2022

(1) Velocity modulation

(2) Amplitude modulation

(3) Frequency modulation

(D) Phase modulation

Klystron operation is based on the principle of velocity modulation. The velocity modulation theory underlies klystron operation. A beam of electrons' velocity will change as a result of the electrons in the beam alternately speeding up and slowing down. This is known as velocity modulation. The buncher grids are a pair of closely spaced grids through which the electron beam (shown by 1, 2, and 3) passes.

klystron-operation

Klystron Operation

Klystrons are specialised linear-beam vacuum tubes that are used as amplifiers for high radio frequencies, from UHF up to the microwave range. They were developed in 1937 by American electrical engineers Sigurd Varian and Russell. High-power klystrons are used as output tubes in UHF television transmitters, radar transmitters, and satellite communication to produce the driving power for contemporary particle accelerators. Low-power klystrons are employed as oscillators in terrestrial microwave relay communications lines.

In a klystron, radio waves and electron beams interact as they move through resonant cavities, which are metal boxes arranged down the length of a tube. The input signal is applied to a cavity that the electron beam first passes through. The signal is amplified by the electron beam's energy and extracted from a cavity at the other end of the tube.

Applications of Klystron

A Klystron can be used for the following things:

  • Receivers for radio and RADAR
  • the source of signals in microwave generators
  • Portable microwave links use frequency-modulated oscillators.
  • For parametric amplifiers, a pump oscillator
  • Microwave receivers' local oscillator

Summary:

Klystron operation is based on the principle of? (1) Velocity modulation (2) Amplitude modulation (3) Frequency modulation (D) Phase modulation

The klystron operates according to the velocity modulation hypothesis. When electrons in a beam alternately accelerate and decelerate, the velocity of the beam will fluctuate.

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