Quarter-Inch (1/4") corrugated coaxial cable is a flexible, light duty jumper cable designed for short interconnections within large antenna systems. Quarter-Inch jumper cables are one of three main cable types used in Distributed Antenna Systems.

While designs can vary between manufacturers, quarter-inch cables always maintain a 9.1 mm outer diameter and use a 2.4 mm diameter inner conductor. This cable uses a solid corrugated copper outer conductor providing 110 dB of shielding effectiveness, and most importantly meets very low PIM targets.

1/4" quarter inch corrugated coaxial cable FSJ1-50

RF Specification

Min. Frequency
0 GHz
Max. Frequency
18.6 GHz
Shielding Effectiveness
> 110 dB
Capacitance
76 pF/m
RF Operating Voltage
830 Vrms
dc Test Voltage
1600 V
Impedance
50 Ω
Inner Conductor Resistance
9.80 Ω/km
Outer Conductor Resistance
7.20 Ω/km
Velocity
88%
Peak Power
6.40 kW
Attenuation Table
Frequency Attenuation
1000 MHz
0.195 dB/m

Physical Specification

Flexibility
Semi-Flexible
Colour
Black
Min. Bend Radius Static
38 mm
Min. Bend Radius Dynamic
76 mm
Min. Operating Temperature
-55 °C
Max. Operating Temperature
85 °C
Weight (g/m)
90 g
Cable Layers
Layer Diameter Materials
Inner Conductor
2.40 mm
Solid Copper
Dielectric
6.50 mm
Foamed Polyethylene (EPE)
Outer Conductor
7.50 mm
Corrugated Copper Tube
Outer Jacket
9.10 mm
Polyethylene (PE)

Manufacturer Variations

Illustration Manufacturer Series Full Name
CommScope FSJ1-50A superflexible quarter inch coaxial cable CommScope FSJ1-50A FSJ1-50A, HELIAX® Superflexible Low Density Foam Coaxial Cable, corrugated copper, 1/4 in, black PE jacket