HLCTY(Z)(R)-50-22C Tunnel Leaky Coaxial Cable

The tunnel leaky cable HLCTY(Z)(R)-50-22C consists of a flexible corrugated copper tube inner conductor, a low-loss physically foamed polyethylene insulation layer, a low-loss broadband radiation copper foil outer conductor with “8”-shaped slots, and an LSZH flame-retardant polyolefin outer jacket. When used outdoors, the outer jacket is made of UV-resistant linear low-density polyethylene. This product is designed for tunnel environments and is suitable for the dedicated TETRA system, signal CBTC system, railway GSM-R, LET-R systems, WLAN, CDMA800, GSM900, GSM1800, WCDMA, CDMA2000, TD-SCDMA, TDD-LTE, FDD-LTE and other systems, with good broadband and bending performance.

Construction materials

Inner conductor: Smooth copper tube
Insulation: Physically foamed polyethylene
Outer conductor: Slotted copper tape
Jacket: Linear low-density polyethylene / LSZH flame-retardant polyolefin（two options available）
Jacket color: Black

Construction dimensions

Inner conductor diameter: 9.40 mm
Insulation outer diameter: 22.80 mm
Outer conductor outer diameter: 23.40 mm
Jacket outer diameter: 27.20 mm

Mechanical and physical properties

One-time bending radius: 250 mm
Repeated bending radius: 500 mm
Minimum number of bends: 15
Tensile strength: 1350 N
Bending moment: 14.9 N·m
Recommended clamp spacing: 0.8～1.2 m
Minimum distance to wall: 50 mm

Environmental performance

Storage temperature: -55℃～+85℃
Installation temperature: -40℃～+80℃
Operating temperature: -55℃～+85℃
Relative humidity: 95%
RoHS：Compliant

Electrical Performance（Basic Parameters）
Parameter	Value	Parameter	Value
Capacitance	75.0 pF/m	Characteristic impedance	50±2 Ω
Insulation resistance	≥10000 MΩ·km	Jacket spark voltage	8000 V
Velocity of propagation	89%	Insulation test voltage	10 kV
Inner conductor DC resistance	1.80 Ω/km	Outer conductor DC resistance	3.20 Ω/km
Usable frequency band	5~2700 MHz	Optimum frequency band	700~2700 MHz
Prohibited frequency band	1110~1140 MHz、2220~2280 MHz

Electrical Performance - Voltage Standing Wave Ratio（VSWR）
Frequency band range	Max. VSWR
790~960 MHz	≤1.3
1710~2025 MHz	≤1.3
2110~2170 MHz	≤1.3
2300~2700 MHz	≤1.3

Electrical Performance - Attenuation and Coupling Loss（20℃）
Frequency（MHz）	Attenuation（dB/100m）	Coupling loss（95%，2m，dB）
800	3.9	74
900	4.2	72
1800	6.5	72
1900	6.9	70
2000	7.2	70
2100	7.5	69
2200	7.8	69
2300	8.5	68
2400	9.0	68
2600	9.6	68
2700	10.6	67

Note: Attenuation values are typical, with a maximum deviation not exceeding 5%; coupling loss tolerance is ±5 dB.

Polarization

5~150 MHz：Cross polarization
700~2700 MHz：Horizontal polarization

Test standards

Flame retardancy: IEC 60332-1
Smoke index: IEC 61034
Toxicity index: IEC 60754-1、IEC 60754-2
Attenuation and coupling loss: IEC 61196-4

Certifications

ISO 9001:2015：Compliant
RoHS 2011/65/EU：Compliant

Delivery standards

Custom production in specified lengths or cutting of existing products is supported（please specify the exact requirements in the order）.
The jacket material（linear low-density polyethylene / LSZH flame-retardant polyolefin）must be clearly specified in the order.
For special protection, length or construction customization requirements, please contact our customer service to confirm.

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