A repeater is a device which amplifies signals of low strength and re-transmits them with a higher strength which enables the transmission of a signal over greater distances without any degradation which in turn reduces blank spots too.

Repeaters are used in radio communication services. Based on their placement there are several types of repeaters, such as :

Outdoor
1. Microwave
2. Optic
3. RF

Indoor
1. IF/IBS
2. RF