Explain the function of a repeater in a communication system.

Hint : Repeaters are used in communication systems because they receive an incoming signal and amplify it and then transmit it again. Repeaters are often used in households to extend the Wi-Fi signal strength away from the router.

Complete step by step answer
Repeaters are used to increase the range of communication of signals.
A repeater is a simple facility used for network interconnection, whose major function is to receive a network signal from the transmitter and to regenerate the signal in strength and retransmit the signal while maintaining the data that is transmitted by the signal. A repeater regenerates the strength of the signal before transmitting it as without the repeater, the signal strength will deteriorate as the signal is transmitted.
A repeater is a combination of a receiver and a transmitter. A repeater picks up the signal from the transmitter, amplifiers and retransmits it to the receiver while maintaining the strength and data in the signal. A typical example of a repeater station is a repeater used in households to extend Wi-Fi signals as well as in communication satellites.

Note
Repeaters are usually used when the transmitter does not have a direct line of sight with the receiver. In such cases, we use a repeater to establish a common point between the transmitter and the receiver such that the repeater is in direct line of sight with the transmitter and the receiver.