Lifetime Connectivity

RLKAX12-50JFNA
1/2" RADIAFLEX® RLKAX Cable, A-series

Rev : A | 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

  • Ultra-wideband from 30 MHz to 7200 MHz
  • Support of 4G and 5G wireless bands and WLAN standards
  • Suitable for a wide range of applications in tunnels and buildings
  • Low coupling loss variations for balanced system design througout the overall supported spectrum
rlk12-50jfna.jpg
General Specifications
Size 1/2
Electrical Specifications
Max. Operating Frequency 7200 MHz
Cable Type RLKAX
Impedance 50 +/- 2
Velocity 88 percent
Capacitance 75pF/m (22.86pF/ft)
DC-resistance inner conductor 1.97ohm/1000 m (0.6ohm/1000 ft)
DC-resistance outer conductor 4.84ohm/1000 m (1.48ohm/1000 ft)
Stop bands 1900-2190
Frequency Selection 2400, 2600, 3500, 3800, 4200, 4900, 5800, 7000
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 Copper Clad Aluminum Wire
Outer Conductor Material Overlapping Copper Foil
Diameter Inner Conductor 4.37mm (0.17in)
Diameter Outer Conductor 11.4mm (0.45in)
Minimum Bending Radius 200mm (7.9in)
Cable Weight 0.23kg/m (0.16lb/ft)
Tensile Force 1300N (292lb)
Indication of Slot Alignment Bulge atop slots
Recommended / Maximum Clamp Spacing 0.5m (1.6ft)
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
EN50575:2014 + A1:2016 (Hannover production) class Cca s1a d1 a1
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
75 2.09 (0.64) 62 (65) 72 (75)
150 2.96 (0.90) 72 (75) 81 (85)
450 5.25 (1.60) 75 (78) 86 (89)
700 6.60 (2.01) 74 (78) 85 (88)
900 7.57 (2.31) 74 (77) 84 (87)
1500 10.0 (3.05) 79 (82) 90 (92)
1700 10.8 (3.29) 73 (76) 84 (86)
1800 11.1 (3.38) 75 (77) 86 (88)
2200 12.8 (3.90) 64 (68) 73 (77)
2400 13.4 (4.08) 68 (70) 75 (77)
2600 14.1 (4.30) 66 (69) 71 (75)
2700 14.5 (4.42) 68 (70) 74 (77)
3200 15.8 (4.82) 68 (72) 74 (79)
3400 16.4 (5.00) 67 (71) 72 (76)
3600 17.0 (5.18) 68 (72) 72 (77)
3800 17.7 (5.39) 66 (70) 70 (75)
4000 18.5 (5.64) 69 (73) 74 (78)
4200 19.1 (5.82) 64 (68) 68 (73)
4800 21.1 (6.43) 66 (70) 71 (76)
5000 21.8 (6.64) 65 (69) 70 (75)
5200 22.5 (6.86) 65 (69) 70 (75)
5400 23.3 (7.10) 65 (69) 69 (73)
5600 24.2 (7.38) 66 (69) 70 (75)
5800 25.1 (7.65) 66 (70) 72 (76)
6000 26.0 (7.92) 64 (68) 69 (73)
6200 26.8 (8.17) 65 (68) 69 (74)
6400 28.0 (8.53) 64 (68) 70 (74)
6600 29.1 (8.87) 63 (67) 68 (72)
6800 30.5 (9.30) 63 (67) 69 (73)
7000 32.1 (9.78) 63 (67) 69 (73)
7200 33.9 (10.3) 63 (66) 68 (72)

  • 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
  • Coupling loss values are measured with dipole (75 - 4200MHz) and biconical antenna (4400-7200MHz). Values are normalized to half-wave dipole. The coupling loss values given in brackets are average values of all three spatial orientations (radial, parallel and orthogonal)
  • Coupling loss values are given with tolerances of +5dB and longitudinal loss values with a tolerance of +5%
  • Measured values below nominal are better. Note: measured values below nomila are better. They are not limited by any tolerance range
  • Coupling as well as longitudinal loss of RFS RADIAFLEX® cables are measured by free-space method according to IEC 61196-4
  • 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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