Radio waves travel through the air by line-of-sight, making radio communication underground difficult. PBE’s Leaky Feeder solves this problem by forming an antenna that is installed throughout the mine, providing complete radio communication coverage. Leaky Feeder cable is strong and flexible, so there is no problem installing the network around corners and turns. PBE’s Leaky Feeder cable is a type of coaxial cable that ‘leaks’ radio signals throughout the mine. Amplifiers are installed along the Leaky Feeder cable to boost the signal and compensate for cable loss. Branch units can be used to provide service down different pathways.