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Microwave Communication

Microwave Communication
Microwave frequencies are normally regarded as those in the range of

10 to 1000 GHz
1000 to 10,000 GHz
1 to 100 GHz
1 to 500 MHz

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

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

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Microwave Communication
The coarse frequency adjustment of a reflex klystron is accomplished by

The AFC system
Adjusting the flexible wall of the resonant cavity
An adjustment in the synchronizer
Varying the repeller voltage

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Microwave Communication
The antenna separations (in meters) required for optimum operation of a space diversity system can be calculated from:where R = effective earth radius (m) and L = path length (m)

S = λR/L
S = 3λR/L
S = λR/RL
S = 2λR/L

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

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

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

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

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MORE MCQ ON Microwave Communication

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