What is a repeater used for in communication systems?

A repeater plays a critical role in communication systems by amplifying and retransmitting signals, which is essential for maintaining signal integrity over long distances. As signals travel, they can weaken due to attenuation, which is caused by various factors such as distance, obstacles, and interference. A repeater receives the weakened signal, amplifies it to restore its strength, and then retransmits it. This process ensures that the information can travel farther than would be possible without the use of a repeater.

Using a repeater allows communication systems to operate effectively in larger geographical areas, making it indispensable in scenarios such as radio communications, cellular networks, and various data transmission applications. By addressing signal degradation and ensuring robust transmission, repeaters enhance the overall reliability of communication systems, facilitating clearer and more consistent connections.