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Microwave Communication

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

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

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Microwave Communication
Which of the following is used as a high power microwave oscillator?

Reflex-klystron
Magnetron
Thyratron
Klystron

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Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

A decrease in range
A decrease in gain
No noticeable effect
A reduction in horizontal resolution

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

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

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Microwave Communication
What is the purpose of the electromagnetic field which surrounds a traveling-wave tube?

To velocity modulate the electron beam
To keep the electrons from spreading out
To slow down the signal on the helix
To accelerate the electron

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Microwave Communication
In microwave transmission using digital radio, what causes most intersymbol interference?

Delayed spreading
Slow fading
Random Doppler shift
Rayleigh fading

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MORE MCQ ON Microwave Communication

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