Microwave Linear Beam Tubes » Exercise – 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
2. Decreasing the volume of a cavity causes its resonant frequency to :
(a) increase
(b) decrease
(c) remain the same
(d) drop to zero
3. Which of the following is not a microwave tube ?
(a) traveling-wave tube
(b) cathode-ray tube
(c) klystron
(d) magnetron
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
5. A reflex klystron is used as a(n) :
(a) amplifier
(b) oscillator
(c) mixer
(d) frequency multiplier
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