Due to the large floor area and numerous internal partitions in high-rise buildings, wireless signals suffer significant attenuation, and outdoor macro base stations alone cannot provide reliable indoor coverage. To ensure adequate signal strength, high-power repeaters and indoor antenna distribution systems must be deployed inside the building.

A high-gain panel antenna is used as the donor (receiving) antenna and is installed on the rooftop wall facing the base-station tower, or in the direction where mobile test software shows the strongest signal. The donor antenna is connected to the repeater using a 1/2″ feeder cable with a length of no more than 50 meters.

The repeater (MS) output port is then connected to the indoor distribution antenna system—consisting of power splitters, couplers and indoor antennas—designed and installed according to the coverage plan. Omnidirectional ceiling antennas provide 360-degree coverage. For aesthetic reasons, the RF cables connecting the antennas and the host should be routed and concealed inside the walls before interior decoration is completed.