Low Attenuation The low attenuation of HELIFLEX® coaxial cable results in highly efficient signal transfer in your RF system.
Complete Shielding The solid outer conductor of HELIFLEX® coaxial cable creates a continuous RFI/EMI shield that minimizes system interference.
Low VSWR Special low VSWR versions of HELIFLEX® coaxial cables contribute to low system noise.
Outstanding Intermodulation Performance HELIFLEX® coaxial cable's solid inner and outer conductors virtually eliminate intermods. Intermodulation performance is also confirmed with state-of-the-art equipment at the RFS factory.
High Power Rating Due to their low attenuation, outstanding heat transfer properties and temperature stabilized dielectric materials, HELIFLEX® cable provides safe long term operating life at high transmit power levels.
Wide Range of Application Typical areas of application are: feedlines for broadcast and terrestrial microwave antennas, wireless cellular, PCS and ESMR base stations, cabling of antenna arrays and radio equipment interconnects.
3" HELIFLEX® Air Dielectric Coaxial Cable
TV & Radio
Inner Conductor Material
Corrugated Copper Tube
Helical Polyethylene Spacer
Outer Conductor Material
Polyethylene, PE, Bitumen Filling
Testing and Environmental
Flame Retardant Jacket Specifications
Meets the requirements according to: IEC60754-1, IEC60754-2
-25 to 60 (-13 to 140)
-70 to 85 (-94 to 185)
-50 to 85 (-58 to 185)
50 +/- 0.5
Peak Power Rating
RF Peak Voltage
Inner Conductor dc Resistance
Ω/1000 m (Ω/1000 ft)
Outer Conductor dc Resistance
Ω/1000 m (Ω/1000 ft)
Return Loss (VSWR) Performance
Min. Return Loss (Max. VSWR)
Typical 20.8dB (1.2 VSWR) or better within the operation bands of most global frequency ranges. Premium also available. Contact factory for options in your specific frequency band.
Phase stabilized and phase matched cables and assemblies are available upon request.
Temperature & Power
Cable Weight, Nominal
Minimum Bending Radius, Single Bend
Minimum Bending Radius, Repeated Bends
Recommended / Maximum Clamp Spacing
0.8 / 1.2 (2.75 / 4)
Attenuation @ 20°C (68°F) and Power Rating @ 40°C (104°F)