Lifetime Connectivity

RLK158-50JFNA
1-5/8" RADIAFLEX® RLK Cable, A-series

Rev : P4 | Rev date : 15 Nov 2025
  • RADIAFLEX® functions as a distributed antenna to provide communications in tunnels, mines and large building complexes and is the solution for any application in confined areas.
  • Slots in the copper outer conductor allow a controlled portion of the internal RF energy to be radiated into the surrounding environment. Conversely, a signal transmitted near the cable will couple into the slots and be carried along the cable length.
  • RADIAFLEX® is used for both one-way and two-way communication systems and because of its broadband capability, a single radiating cable can handle multiple communication systems simultaneously.
  • This RADIAFLEX® radiating cable utilize a low-loss cellular polyethylene foam dielectric and a smooth copper outer conductor which offers a superior electrical performance together with good bending properties.

Feature / Benefits

  • Broadband from 30 MHz to 980 MHz
  • For applications in tunnels and buildings
  • Low coupling loss variations
rlk158.jpg
General Specifications
Size 1-5/8
Electrical Specifications
Max. Operating Frequency 965 MHz
Cable Type RLK
Impedance 50 +/- 2
Velocity 90 percent
Capacitance 73pF/m (23.2pF/ft)
Inductance 0.19µH/m (0.058µH/ft)
DC-resistance inner conductor 1.62ohm/1000 m (0.49ohm/1000 ft)
DC-resistance outer conductor 1.47ohm/1000 m (0.45ohm/1000 ft)
Stop bands 300-350, 635-695, 965 and above
Frequency Selection 600, 900
Mechanical Specifications
Jacket JFN
Jacket Description Halogen free, non corrosive, flame and fire retardant, low smoke, polyolefin
Slot Design Groups of vertical slots at short intervals
Inner Conductor Material Corrugated Copper Tube
Outer Conductor Material Overlapping Copper Strip
Diameter Inner Conductor 17.6mm (0.69in)
Diameter Outer Conductor 44.2mm (1.74in)
Minimum Bending Radius 700mm (28in)
Cable Weight 1.01kg/m (0.68lb/ft)
Tensile Force 1200N (270lb)
Indication of Slot Alignment Guides opposite to slots
Recommended / Maximum Clamp Spacing 1.5m (5ft)
Minimum Distance to Wall 80mm (3.15in)
Testing and Environmental
Jacket Testing Methods Test methods for fire behaviour of cable :
IEC 60754-1/-2 smoke emission: halogen free, non corrosive
IEC 61034 low smoke
IEC 60332-1 flame retardant
IEC 60332-3-24 fire retardant
UL1666, ASTM E 662, NES711 and NES713
Temperature Specifications
Storage Temperature -70°C to 85°C (-94°F to 185°F)
Installation Temperature -25°C to 60°C (-13°F to 140°F)
Operation Temperature -40°C to 85°C (-40°F to 185°F)
Attenuation and Power Rating
Frequency, MHz Longitudinal Loss, dB/100 m (dB/100 ft) Coupling Loss 50%, dB Coupling Loss 95%, dB
35 0,43 (0,13) 48 (51) 58 (61)
75 0,62 (0,19) 52 (56) 61 (65)
150 0,91 (0,28) 57 (61) 69 (73)
400 1,77 (0,54) 56 (58) 59 (61)
450 1,86 (0,57) 56 (58) 59 (61)
470 1,91 (0,58) 56 (58) 59 (61)
480 1,94 (0,59) 56 (58) 59 (61)
800 3,06 (0,93) 55 (59) 59 (63)
870 3,34 (1,02) 55 (59) 59 (63)
900 3,46 (1,06) 55 (59) 59 (63)
960 3,73 (1,14) 55 (59) 59 (63)

  • Coupling loss as well as longitudinal attenuation of RADIAFLEX® cables are measured by the free space method according to IEC 61196-4.
  • Coupling loss values are measured with a radial (below 330 MHz) or parallel (above 330 MHz) orientated dipole antenna.
  • The coupling loss values given in brackets are average values of all three spatial orientations (radial, parallel and orthogonal) of dipole antenna.
  • Coupling loss values are given with a tolerance of +10 dB and longitudinal loss values with a tolerance of +5%. Note: Measured values below nominal are better. They are not limited by any tolerance-range.
  • In case of a conflict of operational and stop band, please contact RFS for further assistance.
  • As with any radiating cable, the performance in building or tunnel environments may deviate from figures based on free space method.

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