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Microwave Communication

Microwave Communication
A high-power microwave pulse of the order of megawatts can be generated by a

Gunn diode
Reflex klystron
Magnetron
Traveling-wave tube

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Microwave Communication
A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

The frequency will decrease
Output power would increase
Oscillation will cease
Bunching would occur earlier in time

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

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

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Microwave Communication
If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers

Must be increased
Must be doubled
May be decreased
Must remain as before

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

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

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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/RL
S = 3λR/L
S = 2λR/L
S = λR/L

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MORE MCQ ON Microwave Communication

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