Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

A decrease in gain
A reduction in horizontal resolution
A decrease in range
No noticeable effect

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Microwave Communication
In a pulsed radar set, the STC circuit is used to

Improve the target bearing resolution
Vary the pulse frequency in order to control the maximum target
Increases receiver sensitivity for echoes from targets
Reduce interference from the effects of sea return

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