VHF Leaky Feeder Cable

A VHF (Very High Frequency) leaky feeder cable is used in underground mining, tunnels, and other environments where radio signals need to be transmitted and received. It is designed to provide continuous wireless communication coverage along its entire length.

Features

Construction Material

  • Inner Conductor: Copper, 2.31± 0.05 mm diameter
  • Insulation: Foam PE, 9.50± 0.2 mm diameter
  • Shielding: PET foil
  • Inner Jacket: PE, 13.43± 0.2 mm diameter
  • Jacket: PE /LSZH, Blue/Yellow, 15.50± 0.2 mm diameter

Electrical Properties

  • Impedance: 75 ohm ± 2.0 ohm
  • Capacitance: 51 ± 2.0 pF/m
  • Insulation Resistance: 1000 MΩ/km
  • DC Resistance Inner Conductor: < 4.5 ohm/km
  • DC Resistance Outer Conductor: < 4.2 ohm/km
  • V.S.W.R: ≤ 1.20 (0-300MHz)

Mechanical Properties

  • Bend Radius Min.: 100 mm
  • Tensile Strength: 1000 N
  • Recommended temperature:
    • Storage: -40~+70°C
    • Installation: -40~+70°C

Signal

Attenuation and Average Power

Frequency

MHz

 Attenuation

@20°C dB/100m

     Coupling loss

@20°C dB
30 1.80 50
85 3.10 55
150 4.15 65
160 4.30 67
180 4.50 70
450 6.30 90

Max. attenuation value shall be 105% of the nominal attenuation value.

Categories

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