18 GHz High-Voltage Ultra-Low-Loss RF Cable L63

Engineering Note

The L63 is an 18 GHz high-voltage ultra-low-loss flexible RF coaxial cable designed for demanding high-power microwave interconnects, advanced communication infrastructure, RF testing, avionics routing, and high-voltage RF paths. Its 6.35 mm blue FEP heavy-duty jacket, LD PTFE dielectric, silver-plated copper strip inner shield, and silver-plated copper wire braid outer shield support stable signal transmission in high-intensity RF environments. The cable combines DC–18 GHz operating capability, 2000 V.DC dielectric withstand voltage, -155 dBc low PIM performance, 99.0 dB/100m attenuation at 18 GHz, and 0.220 kW average power at 18 GHz for protected high-power microwave routing.

Cable Name	L63
Product Type	High-Voltage Ultra-Low-Loss Flexible RF Coaxial Cable
Cable Structure	5-layer flexible RF cable with heavy-duty blue FEP jacket
Operating Frequency	DC–18 GHz
Cut-off Frequency	23 GHz
Impedance	50 ± 1 Ω
Velocity of Propagation	76%
Shielding Effectiveness	>90 dB
Dielectric Withstanding Voltage	2000 V.DC
Low PIM Performance	-155 dBc
Static Bending Radius	31 mm [1.220 in]
Dynamic Bending Radius	63 mm [2.480 in]
Weight	0.094 kg/m [0.0632 lbs/ft]
Temperature Range	-55 to +165 °C [-67 to +329 °F]
Inner Conductor	Silver-plated copper, 1.57 mm [0.062 in]
Dielectric	Low Density PTFE, 4.72 mm [0.186 in]
Inner Shield	Silver-plated copper strip, 4.90 mm [0.193 in]
Outer Shield	Silver-plated copper wire braiding, 5.50 mm [0.217 in]
Jacket	FEP / Blue, customizable, 6.35 mm [0.250 in]
Attenuation	21.4 dB/100m @1 GHz; 30.6 dB/100m @2 GHz; 37.9 dB/100m @3 GHz; 54.6 dB/100m @6 GHz; 63.7 dB/100m @8 GHz; 71.8 dB/100m @10 GHz; 80.7 dB/100m @12.4 GHz; 89.6 dB/100m @16 GHz; 99.0 dB/100m @18 GHz
Average Power	1.019 kW @1 GHz; 0.712 kW @2 GHz; 0.577 kW @3 GHz; 0.400 kW @6 GHz; 0.343 kW @8 GHz; 0.304 kW @10 GHz; 0.271 kW @12.4 GHz; 0.240 kW @16 GHz; 0.220 kW @18 GHz