10 km. radiating feeder 7/8″ are designed for operation in the technological radio communication system of the underground.
The feeder has the following attenuation parameters:
at 75 MHz - 1,2 dB / 100 m.
at 150 MHz - 1,6 dB / 100 m.
at 450 MHz - 3,0 dB / 100 m.
at 900 MHz - 4,5 dB / 100 m.
at 1.8 GHz - 6,9 dB / 100 m.
at 2,1 GHz - 7,9 dB / 100 m.
at 2,4 GHz - 8,6 dB / 100 m.
The radiating feeder is a coaxial antenna with the radiation of a radio signal into space along its entire length. It is used to provide radio coverage in tunnels, an extensive network of corridors, underground utilities, isolated rooms, metal hangars, etc.
Such a feeder, supplied by our company, is already operating in the TETRA standard digital trunking radio communication system installed at the Donbass Arena stadium complex to provide radio coverage inside the technological premises of the complex.