What is 2 cavity 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.
How is it achieved in two cavity klystron?
The two-cavity klystron utilizes an electron source (heater), an anode, and a cathode like a conventional vacuum tube. The heater boils off electrons when heated and the electrons are ejected from the cathode and accelerate towards the anode due to the high dc potential between the two elements.
What is Klystrons explain the working principle of two cavities Klystrons with help of diagram and signals?
The electrons while passing through the second cavity, few of them are accelerated while bunches of electrons are decelerated. Hence, all the kinetic energy is converted into electromagnetic energy to produce the output signal. Amplification of such two-cavity Klystron is low and hence multi-cavity Klystrons are used.
What is the difference between two cavity klystron and reflex klystron?
Difference Between Two Cavity Klystron and Reflex Klystron In two-cavity klystron, the collector used to collect the electron. 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.
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.
Why is two cavity reflex klystron usually not constructed?
What are the advantages of more than two cavities in a klystron?
Advantages of two cavity Klystron: The addition of an intermediate cavity between the i/p and o/p cavities of the basic klystron can be improves the power o/p, efficiency and klystron amplification. Extra cavities serve to velocity modulate the electron beam and generate an increase in the energy available at the o/p.
What is cavity reflex klystron?
This microwave generator, is a Klystron that works on reflections and oscillations in a single cavity, which has a variable frequency. Reflex Klystron consists of an electron gun, a cathode filament, an anode cavity, and an electrode at the cathode potential. It provides low power and has low efficiency.
What is a two cavity 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 a multi-cavity klystron amplifier?
The following figure depicts an example of multi-cavity Klystron amplifier. With the signal applied in the first cavity, we get weak bunches in the second cavity. These will set up a field in the third cavity, which produces more concentrated bunches and so on.
Why is a two-cavity klystron used to produce electromagnetic waves?
The electrons while passing through the second cavity, few of them are accelerated while bunches of electrons are decelerated. Hence, all the kinetic energy is converted into electromagnetic energy to produce the output signal. Amplification of such two-cavity Klystron is low and hence multi-cavity Klystrons are used.
How does a klystron tube work?
On each side of the cavity hole is a grid that the electrons pass through. It is the interaction of the cavities with the beam that provides the high levels of amplification that the device can produce. Figure 2. Layout of klystron tube Perhaps we can digress a moment to discuss the cavity used in the buncher and the catcher.
