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Microwave Engineering: Microwave Tubes
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Microwave Engineering: Microwave Tubes
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25 Questions

1. Indicate the false statement. Klystron amplifiers may use intermediate cavities to
2. ____is the most common antenna to the predetermined radiation pattern.
3. A backward-wave oscillator is based on the
4. The attenuator is used in the traveling-wave tube to
5. The maximum theoretical output circuit efficiency of a double resonator klystron amplifier is
6. one of the bands that come under Microwave Band.
7. The noise produced in a microwave tube due to random nature of emission and electron flow is called
8. The production of power at higher frequencies is much simpler than production of power at low frequencies.
9. Reflex klystron is used in_____.
10. One of the following is used for amplification of microwave energy.
11. In multicavity klystron additional cavities are inserted between buncher & catcher cavities to achieve
12. _____ devices use a helix?
13. The TWT is sometimes preferred to the multicavity klystron amplifier, because it
14. A magnetic field is used in the cavity magnetron to
15. The cavity magnetron uses strapping to
16. The multicavity klystron
17. The glass tube of a TWT may be coated with aquadag to
18. ____________ is a microwave device in which the frequency of operation is determined by the biasing field strength.
19. Magnetrons are microwave devices that offer very high efficiencies of about 80%.
20. The pulse frequency is equal to
21. Reflex klystron is a ______
22. ______ principle does Klystron operates
23. The primary purpose of the helix in a traveling-wave tube is to
24. _____ devices use a helix?
25. Extended interaction oscillator is a ________ beam oscillator that is similar to klystron.

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