What is the need of multi cavity klystron?
Multicavity Klystron (MCK) is a high power microwave (HPM) vacuum electronic device used to amplify radio-frequency (RF) signals. MCKs have numerous applications, including radar, radio navigation, space communication, television, radio repeaters, and charged particle accelerators.
What is the application of klystron?
Low-power klystrons are used as oscillators in terrestrial microwave relay communications links, while high-power klystrons are used as output tubes in UHF television transmitters, satellite communication, radar transmitters, and to generate the drive power for modern particle accelerators.
Why multi cavities are used to?
The multi cavity klystron consist of a glass envelope in which there is an electron gun composed of heater and cathode. Between the cavities around the glass envelope a magnet is used in order to keep the electron beam in the center and in concentrated form at the end inside the glass envelope.
Why is two-cavity klystron not usually constructed?
However, a two-cavity klystron oscillator is usually not constructed because, when the oscillation frequency is varied, the resonant frequency of each cavity and the feedback path phase shift must be readjusted for a positive feedback.
Which of the following devices uses a helix?
Which of the following devices uses a helix? Explanation: In a klystron the resonant structure limits the bandwidth. A TWT is a broadband device.
How do Klystrons produce microwaves?
klystron, thermionic electron tube that generates or amplifies microwaves by controlling the speed of a stream of electrons. Amplitude modulation of the electrons in their bunched-up state induces a strong signal as the stream passes through the gap of a second resonator.
Where is TWT used in radar?
TWTA transmitters are used extensively in radar, particularly in airborne fire-control radar systems, and in electronic warfare and self-protection systems. In such applications, a control grid is typically introduced between the TWT’s electron gun and slow-wave structure to allow pulsed operation.
Why klystron is called an O type device?
What are O type tube? It is also called as linear beam tube. Klystrons and TWT’s are linear beam or O type tubes in which the accelerating electric field in the same direction as the static magnetic field used to focus the electron beam.
On what principle does multi cavity klystron work?
Working Principle of Reflex Klystron Reflex Klystron works on the principle of velocity and current modulation. The electron beam is injected from the cathode. The electron beam passes through the accelerating anode. The electron moves in the tube with uniform velocity until it reaches the cavity.
What are the applications of magnetron?
Applications for magnetrons include radar, microwave ovens, and lighting systems. In radar devices, magnetrons use very short pulses of applied voltage. In microwave ovens, a waveguide leads to a port in the cooking chamber.
What is difference between reflex klystron and two cavity klystron?
Difference Between Two Cavity Klystron and Reflex Klystron And this cavity works as a buncher cavity as well as a catcher cavity. Whereas in the reflex klystron, the repeller plate used in place of collector and used to repel the electron beam. The main purpose of Two cavity klystron is to amplify the microwave signal.
What is the efficiency of two cavity klystron?
In general efficiency of two cavity klystron is about 40%.
What can a multicavity klystron be used for?
The multicavity klystrons may be used to increase the gain of the klystron or to increase the bandwidth. They are often operated with their cavities stagger-tuned so as to obtain a greater bandwidth of up to 8% at a reduction in gain.
What kind of amplifier is a klystron?
Definition: Klystrons are a special type of vacuum tubes that find applications as amplifiers and oscillators at microwave frequencies. Its principle of operation is velocity modulation. Thus the device used for amplifying microwave signals is known as Two-cavity Klystron.
What is the principle of operation of a klystron?
Definition: Klystrons are a special type of vacuum tubes that find applications as amplifiers and oscillators at microwave frequencies. Its principle of operation is velocity modulation.
What can a reflex klystron be used for?
The applications of a Reflex Klystron include: 1 Radio and RADAR receiver 2 A signal source in microwave generators 3 Frequency modulated oscillator in portable microwave links 4 Pump oscillator for parametric amplifiers 5 Local oscillator in microwave receivers