Question

Difference between reflex klystron and multi cavity klyastron

Answer 1

Answer:

The difference between reflex and two/multi cavity klystron is that, reflex klystron uses single cavity for modulation/demodulation. Moreover it uses repeller inplace of catcher cavity. Klystron works on the principle of velocity modulation of electrons.

Explanation:

TWT                                                                             Klystron

Interaction between EM field and beam of electrons in TWT is continuous over the entire length. Interaction in klystron occurs only at the gaps of resonant cavities.

In coupled cavity TWT, coupling effect takes place between cavities. In klystron each cavity operates independently and there is no mutual coupling.

TWT does not have resonant cavity. It uses helix structure. Klystron has resonant cavities.

TWT has wider bandwidth of operation. Klystron has smaller bandwidth of operation.

TWT operates on lower efficiency. Klystron has comparatively high efficiency.

There are two types viz. helix and coupled cavity. There are two types viz. Two or Multi-cavity , reflex klystrons

Frequency of operation is from 300 MHz to 50 GHz Frequency of operation is from 4 to 200 GHz

Handles CW power upto 200Watt Handles power of 1 mW to 2.5 W