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Microwave Communication

Microwave Communication
Which causes multipath or frequency selective fading?

Further reflector
Nearer reflector
Large reflector
Small reflector

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Microwave Communication
The resonant frequency of a cavity resonator depends upon

Its physical dimensions
The capacitor which tunes it
The mode of operation
Its electrical dimensions

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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.

Sixth
Fifth
Third
Fourth

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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?

Isolator
Tunnel diode
Circulator
Wave trap

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

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

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

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

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MORE MCQ ON Microwave Communication

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