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Microwave Communication

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

Capacitor
Ferrite emitter
RF emitter
Varactor-triac

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Microwave Communication
Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Fourth
Sixth
Fifth
Third

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

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Microwave Communication
The main frequency determining element of a klystron is

The accelerating voltage
Its mode of operation
The repeller voltage
Its resonant cavity

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Microwave Communication
__________ is the progressive decrease of signal strength with increasing distance.

Modulation
Radiation
Propagation
Attenuation

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

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MORE MCQ ON Microwave Communication

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