For small households where the indoor mobile signal is weak—typically in areas with complex layouts, far from windows or in basements—while the outdoor signal is still good, a simple indoor coverage solution can be deployed. A 5D-FB coaxial cable is used to connect the donor (receiving) antenna to the signal booster unit. An omnidirectional ceiling antenna is installed roughly every 100 m² indoors to provide uniform coverage. At the output port of the signal booster, a 5D-FB coaxial cable connects to a power divider or coupler, distributing the amplified signal to each coverage antenna.

Amplitec’s C17L series mobile signal amplifier provides a very cost-effective solution for such small indoor coverage scenarios. The C17L series boosters are available in single-band, dual-band, tri-band and multi-band models.

In a typical installation, the C17L amplifier (with downlink output power up to 20 dBm) is placed between the donor antenna and the indoor coverage antennas. An omnidirectional ceiling-mounted antenna is installed at the center of the weak-signal area to provide 360-degree coverage, while the donor antenna is mounted on the rooftop, pointing towards the direction of the strongest outdoor signal.