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Microwave Communication

Microwave Communication
In a radar-set receiver, the usual mixer stage is

A silicon crystal
A tunnel diode
And FET
A Rochelle salts crystal

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Microwave Communication
Which of the following permits a microwave signal to travel in one direction with virtually no loss, but severely attenuates any signal attempting to travel in the reverse direction?

Tunnel diode
Circulator
Isolator
Wave trap

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Microwave Communication
A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

Bunching would occur earlier in time
The frequency will decrease
Oscillation will cease
Output power would increase

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Microwave Communication
A PPI cathode-ray tube as used on a radar set

Indicates only the range of a target
Is used for receiver alignment
Indicates both the range and azimuth of a target
Is used to check the percentage of modulation

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

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

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Microwave Communication
In a pulsed radar set, the function of the duplexer is to

Aid in calibrating the display unit
All of these
Prevent frequency drift in the klystron
Allow the transmitter and the receiver to operate from a common antenna

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MORE MCQ ON Microwave Communication

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