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Microwave Crossed Field Tubes – 1 – 2

6. Which of the following microwave tube amplifier uses an axial magnetic field and radial electric field ?

(a) Coaxial magnetron
(b) CFA
(c) Travelling wave magnetron
(d) 
Reflex klystron

ANSWER

EXPLANATION

7. The frequency determining portion of a magnetron is :

(a) A resonant cavity
(b) A shorted line
(c) An open line
(d)
 A cathode

ANSWER

EXPLANATION

8. The gain of a TWT is proportional to :

(a) Length of tube
(b) Type of input and output coupling
(c) None of the above
(d)
 Both a and b

ANSWER

EXPLANATION

9. Which of the following is unlikely to be used as a pulsed device ?

(a) TWT
(b) CFA
(c) BWO
(d) 
Multi-cavity klystron

ANSWER

EXPLANATION

10. TWT is preferred to multicavity klystron amplifier because it is :

(a) More efficient
(b) Greater B.W.
(c) Has higher number of modes
(d) 
Produces a higher output power

ANSWER

EXPLANATION

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