Amplifiers with cutoff circuit to avoid overloading cellular network sites

摘要

A cellular network amplifier for reducing interference in a surrounding cellular network. The cellular network amplifier includes a communication device for receiving an uplink signal from a handset and a first variable gain module for applying an amplification factor to the uplink signal. The amplified uplink signal is transmitted to a base station by an antenna. The antenna also receives a downlink signal transmitted from the base station enroute to the handset. The downlink signal is analyzed by a control circuit, which determines a value of the amplification factor applied to the uplink and downlink signals based on the level of the downlink signal. The value of the amplification factor is determined such that the signal transmitted from the antenna does not introduce interference into the surrounding cellular network.