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Microwave Communication

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

Propagation
Radiation
Attenuation
Modulation

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Microwave Communication
Oscillators of a klystron tube are maintained

By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.
By feedback between the accelerating grid and the repeller
By plate-to-cathode feedback

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Microwave Communication
To achieve good bearing resolution when using a pulsed-radar set, an important requirement is

A high duty cycle
A low repetition rate
A narrow, antenna-beam width in the vertical plane
A narrow, antenna-beam width in the horizontal plane

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

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

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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

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

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Microwave Communication
A traveling-wave tube (TWT) amplifies by virtue of

The absorption of energy by the signal from an electron stream
The effect of an external magnetic field
The energy contained the cavity resonators
The energy liberated form the collector

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MORE MCQ ON Microwave Communication

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