18 GHz Heavy-Duty Economy Low-Loss RF Cable E81

Engineering Note

The E81 is an 18 GHz heavy-duty economy low-loss flexible RF coaxial cable designed for high-power base-station connections, large-scale telecom cabinet routing, high-voltage RF modules, and general internal RF paths where cost-effective construction and robust shielding are required. Its silver-plated copper inner conductor, LD PTFE dielectric, aluminum foil inner shield, silver-plated copper braid outer shield, and 8.10 mm blue FEP jacket provide a durable structure for heavy-duty internal connectivity. The cable supports DC–18 GHz operation, 2000 V.DC dielectric withstand voltage, and >90 dB shielding effectiveness for economy-grade RF routing where strict PIM requirements are not the main constraint.

Cable Name	E81
Product Type	Heavy-Duty Economy Low-Loss Flexible RF Coaxial Cable
Cable Structure	5-layer economy RF cable with aluminum foil inner shield and heavy-duty blue FEP jacket
Operating Frequency	DC–18 GHz
Cut-off Frequency	19 GHz
Impedance	50 ± 1 Ω
Velocity of Propagation	76%
Shielding Effectiveness	>90 dB
Dielectric Withstanding Voltage	2000 V.DC
Static Bending Radius	40 mm [1.575 in]
Dynamic Bending Radius	81 mm [3.189 in]
Weight	0.134 kg/m [0.0900 lbs/ft]
Temperature Range	-55 to +125 °C [-67 to +257 °F]
Inner Conductor	Silver-plated copper, 2.30 mm [0.091 in]
Dielectric	Low Density PTFE, 6.80 mm [0.268 in]
Inner Shield	Aluminum foil, 6.95 mm [0.274 in]
Outer Shield	Silver-plated copper wire braiding, 7.50 mm [0.295 in]
Jacket	FEP / Blue, customizable, 8.10 mm [0.319 in]
Attenuation	15.1 dB/100m @1 GHz; 21.8 dB/100m @2 GHz; 27.2 dB/100m @3 GHz; 40.1 dB/100m @6 GHz; 47.3 dB/100m @8 GHz; 53.8 dB/100m @10 GHz; 61.0 dB/100m @12.4 GHz; 71.0 dB/100m @16 GHz; 76.3 dB/100m @18 GHz
Average Power	1.471 kW @1 GHz; 1.015 kW @2 GHz; 0.814 kW @3 GHz; 0.553 kW @6 GHz; 0.469 kW @8 GHz; 0.412 kW @10 GHz; 0.363 kW @12.4 GHz; 0.312 kW @16 GHz; 0.291 kW @18 GHz