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PBE’s Leaky Feeder System provides a simple and reliable underground communication system.
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.
PBE’s Leaky Feeder System has the ability to scale and grow with a changing environment in any mine or tunnel. Each Leaky Feeder System will be tailored to specific site requirements to provide the best radio coverage.
|Operating Voltage||12, 24, 48 Volts VDC|
|Operating Temperature||-20°C to 55°C | -4°F to 131°F|
|Downlink Frequency||VHF: 151 – 157.5 MHz UHF: 480 – 490 MHz|
|Uplink Frequency||VHF: 170 – 174.5 MHz UHF: 450 – 460 MHz|
|Uplink Bandwidth||VHF: 4.5 MHz UHF: 10 MHz|
|Downlink Bandwidth||VHF: 6.5 MHz UHF: 10 MHz|
|System Impedence||75 ohms|
|Maximum Gain||VHF: 28 dB; UHF: 34 dB|
|Enclosures||Minimum IP55/NEMA4X rated (excluding Head End Combiner)|
|Head End Combiner Transmit / Receive Channels||8 / 8 (expandable to 16/16 analogue or 32/32 digital)|