What is the operating principle of reflex klystron?

What is the operating 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.

Is reflex klystron an oscillator?

The Reflex Klystron Oscillator is a low-power, low-efficiency microwave oscillator, illustrated schematically in Figure 11-8. It has an electron gun similar to that of the multicavity klystron but smaller. Because the device is short, the beam does not require focusing.

What is the condition for oscillation in reflex klystron?

Conditions for Oscillation In general, the condition for optimum operation of a reflex klystron is the same as for the two-resonator klystron, namely, the center of the bunches in the stream should pass through the catcher when the catcher field has its greatest retarding effect.

What is reflex klystron amplifier or oscillator?

Reflex Klystron Amplifier Reflex klystron is invented by Robert Sutton, so another name of this klystron amplifier is Sutton tube. It is a low power tube and works as an oscillator. This amplifier is mainly used as an oscillator within a modulator of radar receivers as well as microwave transmitters.

What are the various modes of operation in the reflex klystron?

Three power sources are required for reflex klystron operation: (1) filament power, (2) positive resonator voltage (often referred to as beam voltage) used to accelerate the electrons through the grid gap of the resonant cavity, and (3) negative repeller voltage used to turn the electron beam around.

What is operating frequency of reflex klystron?

What is the operating frequency and power output of a reflex klystron? Ans. Frequency range: 4GHz – 200GHz Output power: maximum 3W in X-band to 10mW at 220GHz.

What is the operating frequency of reflex klystron?

Which is a single cavity klystron tube that operates as on oscillator by using a reflector electrode after the cavity?

Reflex klystron
Explanation: Reflex klystron is a single cavity klystron tube that operates as on oscillator by using a reflector electrode after the cavity to provide positive feedback via the electron beam. It can be tuned by mechanically adjusting the cavity size.

Which of the following is one of the mode of reflex klystron?

Answer is “Give same frequency but different transit time”

What is electronic tuning of a reflex klystron?

The electronic tuning range of the reflex klystron is usually referred to as the variation in frequency between half power points—the points in the oscillating mode where the power output is half the maximum output in the mode.