Figure 2: Cavity of a repeller klystron. Another tube based on velocity modulation, and used to generate microwave energy, is the reflex klystron (repeller. MICROWAVE & RADAR ENGINEERING TWO CAVITY KLYSTRON . on grid 3 is positive with respect to grid 2 are accelerated by the field. 2 Cavity Klystron. Uploaded by Muthe Murali. operation of two cavity klystron amplifier Documents Similar To 2 Cavity Klystron. ARM interrupt. Uploaded by.


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These changes alternately accelerate and decelerate the electrons of the beam passing through the grids.

Microwave Engineering Cavity Klystron

The electrons 2 cavity klystron bunches in this area when the accelerated electrons overtake the decelerated electrons. Layout of klystron tube Cavity Perhaps we can digress a moment to discuss the cavity used in the buncher and the catcher.

The cavity in this story is a toroid-shaped object with the following cross section: This can also be shown as a resonant tank circuit with the parallel region the capacitor and the circular part a single turn inductor as shown in 2 cavity klystron 2b and 2c.

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The 2 cavity klystron can be made to resonate at a narrow frequency range Figure 2ddefined by its geometry, of course. The central part of the structure acts like a capacitor with a hole in it which is where the electron beam can pass through.

This capacitor and thus the charge applied to anything passing through the central hole will flip charge at the resonant frequency. From an electrical perspective, the capacitance and inductance define the 2 cavity klystron resonant frequency of the structure. An exciting signal is fed into the resonator externally via a coax connection shown at the top of Figure 2a.

Klystron - Wikipedia

This coax connection excites the cavity at the resonant frequency. Electron Bunching The klystron utilizes a phenomenon called electron bunching which goes as follows: The electrons emitted by the 2 cavity klystron are accelerated towards the first resonator. The collector at the end is at the same potential as the resonator.


Hence, usually the electrons have a constant speed in the gap between the cavity resonators. Initially, the first cavity resonator is supplied with a weak high frequency signal, which has to be amplified. The signal 2 cavity klystron initiate an electromagnetic field inside the cavity.

This signal is passed through a coaxial cable as shown in the following figure. Due to this field, the electrons that pass through the cavity resonator are modulated.

On arriving at the second resonator, the electrons are induced with another EMF at the same frequency. This field is strong enough to extract a large signal from the second cavity. Cavity Resonator First let us try 2 cavity klystron understand 2 cavity klystron constructional details and the working of a cavity resonator.


The following figure indicates the cavity resonator. A simple resonant circuit which consists of a capacitor and an inductive loop can be compared with this cavity resonator. A conductor has free electrons.

If a charge is applied to the capacitor to get it charged to a voltage 2 cavity klystron this polarity, many electrons are removed 2 cavity klystron the upper plate and introduced into the lower plate.