Who invented reflex klystron?
Who invented reflex klystron?
The reflex klystron (also known as a Sutton tube after one of its inventors, Robert Sutton) was a low power klystron tube with a single cavity, which functioned as an oscillator.
What is reflex klystron oscillator?
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 the operating principle of reflex klystron?
velocity and current modulation
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.
Which mode is preferred in reflex klystron?
7. What modes are generally used in a reflex klystron? Ans. 1 ¾ and 2 ¾ are the most commonly used modes in a practical reflex klystron.
How oscillations are generated in reflex klystron?
Definition: A Reflex Klystron is a specialized low-power vacuum tube used to produce oscillations at microwave frequency. Its principle of operation is velocity and current modulation. Klystrons are basically specialized tubes used as amplifiers and oscillators at the microwave frequency range.
What are the limitations of reflex klystron?
Following are the disadvantages of Klystron: ➨Two cavity klystron amplifier is not low-noise device. Due to this fact, usually it is used in the transmitter and not in the receiver. ➨It is a narrow band device due to use of resonant cavities.
What is Applegate diagram?
[′ap·əl‚gāt ′dī·ə‚gram] (electronics) A graph of the electron paths in a two-cavity klystron tube, showing how electron bunching occurs.
What are the advantages of klystron?
Advantages of Klystron Amplifiers They can be used to generate far higher microwave power that solid state microwave devices like Gunn diodes. They can operate over a wide frequency range from hundreds of MHz (UHF) through hundreds of GHz.
What is velocity modulation in reflex klystron?
In the reflex Klystron tube, velocity modulation takes place near the accelerating grid. Velocity modulation is a variation of velocity of the electron beam. It allows the passage of an electron beam through a resonant cavity.
What is 2 cavity klystron?
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 klystron frequency?
Klystrons are used in ultrahigh-frequency (UHF) circuits, such as UHF television transmission, and for microwave radar sources, where they can produce oscillations up to 400 gigahertz, in the short microwave range.
What are the elements of klystron?
The essential elements of Klystron are electron beams and cavity resonators. Electron beams are produced from a source and the cavity klystrons are employed to amplify the signals. A collector is present at the end to collect the electrons.