Electronics and Communication Engineering - Microwave Communication - Discussion

10. 

A reflex klystron oscillator uses

[A]. one cavity resonator
[B]. two cavity resonators
[C]. three cavity resonators
[D]. none of the above

Answer: Option A

Explanation:

It uses a single cavity resonator for generating microwave oscillations.

Its parts are electron gun, resonator, repeller and output coupling.

It operates on the principle of positive feed back.

The repeller electrode is at negative potential and sends the partially bunched electron beam back to resonator cavity.

This positive feedback supports oscillations. Its feature are:

1. Frequency range - 2 to 100 GHz

2. Power output - 10 MW to about 2 W

3. Efficiency - 10 - 20 %

Its applications include radar receivers, local oscillator in microwave devices, oscillator for microwave measurements in laboratories etc.


Sankar said: (Oct 15, 2017)  
Klystron has two resonator i.e. buncher and cacher cavities but reflex klystron has only one cavity.

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