HCA400-50JM
4" Air-Dielectric Coaxial Cable, 50 ohm, Low Loss and High Power Rating

Rev : D | Rev date : 25 Mar 2024

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 / BENEFITS

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.

4" Air Dielectric Coaxial Cable

Technical features

Applications
Applications		TV & Radio	HF Defense	Cable Solutions

Structure
Cable Type		Air-Dielectric, Corrugated
Size		4
Jacket Option		Black
Inner Conductor Diameter	mm (in)	34.8 (1.37)
Inner Conductor Material		Corrugated Copper Tube
Dielectric Diameter	mm (in)	75.3 (2.96)
Dielectric Material		Helical Polyethylene Spacer
Outer Conductor Diameter	mm (in)	85.5 (3.36)
Outer Conductor Material		Corrugated Copper
Jacket Diameter	mm (in)	90.5 (3.56)
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	1.66
Velocity	%	96
Capacitance	pF/m (pF/ft)	70 (21.3)
Inductance	uH/m (uH/ft)	0.175 (0.053)
Peak Power Rating	kW	940
RF Peak Voltage	Volts	9700
Jacket Spark	Volt RMS	8000
Inner Conductor dc Resistance	Ω/1000 m (Ω/1000 ft)	0.43 (0.13)
Outer Conductor dc Resistance	Ω/1000 m (Ω/1000 ft)	0.13 (0.04)
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)	3.1 (2.1)
Minimum Bending Radius, Single Bend	mm (in)	380 (15)
Minimum Bending Radius, Repeated Bends	mm (in)	890 (35)
Bending Moment	Nm (lb-ft)	215 (159)
Tensile Strength	N (lb)	1800 (405)
Recommended / Maximum Clamp Spacing	m (ft)	0.8 / 1.2 (2.75 / 4)

Attenuation @ 20°C (68°F) and Power Rating @ 40°C (104°F)
Frequency, MHz	dB per 100m	dB per 100ft	Power, kW
0.5	0.03	0.01	792
1	0.04	0.01	561
1.5	0.04	0.01	457
2	0.05	0.02	395
10	0.11	0.03	175
20	0.16	0.05	123
30	0.19	0.06	100
50	0.25	0.08	77.40
88	0.34	0.10	57.90
100	0.36	0.11	54.10
108	0.38	0.12	52
150	0.45	0.14	44
174	0.48	0.15	40.80
200	0.52	0.16	38
300	0.65	0.20	30.90
400	0.76	0.23	26.70
450	0.81	0.25	25.10
500	0.86	0.26	23.80
512	0.87	0.26	23.60
600	0.95	0.29	21.80
700	1.03	0.31	20.20
800	1.11	0.34	18.90
824	1.13	0.34	18.60
894	1.18	0.36	18
900	1.19	0.36	17.80
925	1.21	0.37	17.60
960	1.23	0.38	17.30
1000	1.26	0.38	17

Related Products

Product Type	Model Number (click to access datasheet)
EIA Connector (O ring sealing version)	318EIA-HCA400-019
EIA Connector Kit (connector + coupling element)	318EIA-HCA400-019KT
EIA Connector Re-installation Kit	318EIA-HCA400-019RK
Cable Hanger Options	CLAMP-400 (Butterfly)
Angle Member Adaptor	ANGLE-CLPI (for butterfly hangers)
Grounding Kit	GKFORM60-400
Hoisting Grip	HOIST1-300L
Wall Feed Through Kit	WF-400
Weather Proofing Kit	WPFG-1
Dehydrator and Accessories	BD Series