Cablewave-RFS HCA78-50JM 7/8" HELIFLEX® Air-Dielectric Coaxial Cable

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SKU:
CAB-HCA7850JM
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Overview

Cablewave-RFS HCA78-50JM 7/8" HELIFLEX® Air-Dielectric Coaxial Cable

RFS Technologies' air dielectric cables are air filled coaxial cables which consist of an inner conductor and an outer conductor. A dielectric helix is used to center the inner conductor to the outer conductor. Air dielectric cables have low attenuation and high power rating which make them perfect choice of high RF power transmission lines, such as in FM, TV and radar systems and networks. Air cables also have better flexibility and crush resistance than other solutions such as rigid lines.

Features

  • Low Attenuation
    The low attenuation of this coaxial cable results in highly efficient signal transfer in your RF system.
  • Complete Shielding
    The solid outer conductor of this coaxial cable creates a continuous RFI/EMI shield that minimizes system interference.
  • Low VSWR
    Standard and low VSWR versions of this coaxial cables contribute to low system noise.
  • Outstanding Intermodulation Performance
    Coaxial cable's solid inner and outer conductors virtually eliminate intermods. Intermodulation performance is also guaranteed by the state-of-the-art manufacturing process at the factory.
  • High Power Rating
    Low attenuation, outstanding heat transfer properties and temperature stabilized dielectric materials enable cable to provide long operating life at high transmit power levels.
  • Wide Range of Application
    Air cables are good choices for telecom, broadcasting, radar and HF defense applications.
  • Reinforced Jacket to Sustain Outdoor Applications
    Polyethylene is proven to be strong and reliable even in extreme environmental conditions.

 

Specifications / Documents

Structure

Cable Type   Air-Dielectric, Corrugated
Size   7/8
Jacket Option   Black
Inner Conductor Diameter mm (in) 9 (0.35)
Inner Conductor Material   Copper Tube
Dielectric Diameter mm (in) 20.2 (0.79)
Dielectric Material   Helical Polyethylene Spacer
Outer Conductor Diameter mm (in) 25.5 (1)
Outer Conductor Material   Corrugated Copper
Jacket Diameter mm (in) 28 (1.103)
Jacket Material   PE (Polyethylene), Medium Density
     

Testing and Environmental

Fire Performance   Halogene Free
Flame Retardant Jacket Specifications   Meets the requirements according to: IEC60754-1, IEC60754-2
Installation Temperature °C(°F) -40 to 60 (-40 to 140)
Storage Temperature °C (°F) -70 to 85 (-94 to 185)
Operation Temperature °C(°F) -50 to 85 (-58 to 185)
     

Electrical Specifications

Impedance Ω 50 +/- 0.5
Maximum Frequency GHz 3
Velocity % 93
Capacitance pF/m (pF/ft) 71 (21.6)
Inductance uH/m (uH/ft) 0.178 (0.054)
Peak Power Rating kW 73
RF Peak Voltage Volts 2700
Jacket Spark Volt RMS 8000
Inner Conductor dc Resistance Ω/1000 m (Ω/1000 ft) 1.1 (0.34)
Outer Conductor dc Resistance Ω/1000 m (Ω/1000 ft) 0.88 (0.27)
     
Return Loss (VSWR) Performance   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  

Phase stabilized and phase matched cables and assemblies are available upon request.

Temperature & Power   Standard
     

Mechanical Specifications

Cable Weight, Nominal kg/m (lb/ft) 0.68 (0.46)
Minimum Bending Radius, Single Bend mm (in) 100 (4)
Minimum Bending Radius, Repeated Bends mm (in) 250 (10)
Bending Moment Nm (lb-ft) 27 (20)
Tensile Strength N (lb) 1600 (360)
Recommended / Maximum Clamp Spacing m (ft) 0.5 / 0.9 (1.8 / 3)

Attenuation @ 20°C (68°F) and Power Rating @ 40°C (104°F)

Frequency, MHz dB per 100m dB per 100ft Power, kW
0.5 0.08 0.03 73
1 0.12 0.04 73
1.5 0.14 0.04 70.90
2 0.16 0.05 61.40
10 0.37 0.11 27.30
20 0.52 0.16 19.20
30 0.64 0.19 15.70
50 0.83 0.25 12.10
88 1.10 0.34 9.11
100 1.18 0.36 8.49
108 1.23 0.37 8.15
150 1.45 0.44 6.92
174 1.57 0.48 6.39
200 1.69 0.51 5.94
300 2.08 0.63 4.84
400 2.42 0.74 4.17
450 2.57 0.79 3.93
500 2.72 0.83 3.71
512 2.76 0.84 3.66
600 3 0.91 3.37
700 3.25 0.99 3.12
800 3.49 1.07 2.91
824 3.55 1.08 2.86
894 3.71 1.13 2.74
900 3.72 1.13 2.74
925 3.78 1.15 2.69
960 3.85 1.17 2.65
1000 3.94 1.20 2.59
1250 4.45 1.36 2.30
1500 4.91 1.50 2.10
1700 5.26 1.60 1.97
1800 5.43 1.65 1.91
2000 5.75 1.75 1.81
2200 6.07 1.85 1.72
2300 6.22 1.90 1.68
3000 7.22 2.20 1.47