HCA78-50J
7/8" HELIFLEX^® Air-Dielectric Coaxial Cable

Rev : E0 | Rev date : 09 Oct 2007

HELIFLEX® 7/8" low loss air dielectric cable

FEATURES / BENEFITS

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.

7/8" HELIFLEX® Air Dielectric Coaxial Cable

External Document Links

Notes

Technical features

Applications
Applications		Wireless Communication	TV & Radio	HF Defense	Mobile Radio	Cable Solutions

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		Polyethylene, PE

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		Standard
Min. Return Loss (Max. VSWR)	dB (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		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