Microwave Communication
It is possible to increase the maximum range of a radar equipment by

All of these
Lowering the pulse frequency
Narrowing the beam width and increasing the pulse duration
Raising the peak power of the transmitter

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

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

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