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Microwave Communication

Microwave Communication
Rainfall is an important factor for fading of radio waves at frequencies above

1 GHz
100 MHz
100 GHz
10 GHz

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Microwave Communication
Calculate the effective earth’s radius if the surface refractivity is 301.

8493 mmi
6370 mi
8493 km
6370 km

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Microwave Communication
If k-factor is greater than 1, the array beam is bent

Towards the earth
Away from the earth
Towards the ionosphere,
Towards the outer space

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Microwave Communication
The aquadag coating on the inside of PPI tube is used

As a second anode and to prevent the build-up of secondary field
To shield the electron beam from unidirectional magnetic
To focus the beam of primary electrons
All of these

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

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

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Microwave Communication
The resonant frequency of a cavity resonator depends upon

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

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MORE MCQ ON Microwave Communication

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