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1. Introduction
Repeaters are used to fill out uncovered areas in cellular mobile systems, such as base
station fringe areas, road tunnels, business and industrial buildings, etc.
A repeater receives signals from a base station, amplifies and retransmits the signals
to mobile stations. Also it receives, amplifies and retransmits signals in the opposite
direction. Both directions are served simultaneously.
To be able to receive and transmit signals in both directions, the repeater is connected
to a donor antenna directed towards the base station and to a service antenna directed
towards the area to be covered.
Figure 1
Outdoor Application
Figure 2
Indoor Application
