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Microwave Communication

Microwave Communication
What allow microwave to pass in only one direction?

Capacitor
Ferrite emitter
Varactor-triac
RF emitter

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Microwave Communication
The coarse frequency adjustment of a reflex klystron is accomplished by

The AFC system
Adjusting the flexible wall of the resonant cavity
An adjustment in the synchronizer
Varying the repeller voltage

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Microwave Communication
If the instantaneous RF potentials on the two sides of a magnetron cavity are of opposite polarity, the operation is in the

2π mode
π mode
π/4 mode
π/2 mode

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Microwave Communication
Oscillators of a klystron tube are maintained

By bunches of electrons passing the cavity grids
By plate-to-cathode feedback
By circulating bunches of electrons within the cavities.
By feedback between the accelerating grid and the repeller

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Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?

Loran C: 100 kHz
Loran D: 10.2 kHz
Loran A: 1950 kHz
Loran B: 900 kHz

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Microwave Communication
The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the

Distributed lead inductance
Electron transit time
Degree of emission from the cathode
Inter-electrode capacitance

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MORE MCQ ON Microwave Communication

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