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Microwave Linear Beam Tubes – 1 – 1

1. The operating frequency of klystrons and magnetrons is set by the :

(a) cavity resonators
(b) DC supply voltage
(c) input signal frequency
(d)
 number of cavities

ANSWER

EXPLANATION

2. Decreasing the volume of a cavity causes its resonant frequency to :

(a) increase
(b) decrease
(c) remain the same
(d) 
drop to zero

ANSWER

EXPLANATION

3. Which of the following is not a microwave tube ?

(a) traveling-wave tube
(b) cathode-ray tube
(c) klystron
(d) 
magnetron

ANSWER

EXPLANATION

4. In a klystron amplifier, velocity modulation of the electron beam is produced by the :

(a) collector
(b) catcher cavity
(c) buncher cavity
(d) 
cathode

ANSWER

EXPLANATION

5. A reflex klystron is used as a(n) :

(a) amplifier
(b) oscillator
(c) mixer
(d) 
frequency multiplier

ANSWER

EXPLANATION

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