18 GHz Premium Ultra-Low-Loss RF Cable L53

Engineering Note

The L53 is an 18 GHz premium ultra-low-loss flexible RF coaxial cable designed for critical wireless communication routing, precision RF testing, avionics RF paths, and ECM system interconnections where low attenuation, low PIM behavior, and higher power handling are required. Its 5.30 mm blue FEP jacket, LD PTFE dielectric, silver-plated copper strip inner shield, and silver-plated copper wire braid outer shield support stable signal transmission in demanding microwave environments. The cable combines DC–18 GHz operating capability, -155 dBc low PIM performance, 111.7 dB/100m attenuation at 18 GHz, and 0.224 kW average power at 18 GHz for premium low-loss RF interconnect applications.

Cable Name	L53
Product Type	Premium Ultra-Low-Loss Flexible RF Coaxial Cable
Cable Structure	5-layer flexible RF cable with blue FEP jacket
Operating Frequency	DC–18 GHz
Cut-off Frequency	25 GHz
Impedance	50 ± 1 Ω
Velocity of Propagation	76%
Shielding Effectiveness	>90 dB
Dielectric Withstanding Voltage	1000 V.DC
Low PIM Performance	-155 dBc
Static Bending Radius	26 mm [1.024 in]
Dynamic Bending Radius	53 mm [2.087 in]
Weight	0.070 kg/m [0.0470 lbs/ft]
Temperature Range	-55 to +165 °C [-67 to +329 °F]
Inner Conductor	Silver-plated copper, 1.44 mm [0.057 in]
Dielectric	Low Density PTFE, 4.15 mm [0.163 in]
Inner Shield	Silver-plated copper strip, 4.35 mm [0.171 in]
Outer Shield	Silver-plated copper wire braiding, 4.90 mm [0.193 in]
Jacket	FEP / Blue, customizable, 5.30 mm [0.209 in]
Attenuation	25.3 dB/100m @1 GHz; 35.9 dB/100m @2 GHz; 44.2 dB/100m @3 GHz; 63.0 dB/100m @6 GHz; 73.1 dB/100m @8 GHz; 82.1 dB/100m @10 GHz; 91.9 dB/100m @12.4 GHz; 111.7 dB/100m @18 GHz
Average Power	0.991 kW @1 GHz; 0.697 kW @2 GHz; 0.567 kW @3 GHz; 0.397 kW @6 GHz; 0.342 kW @8 GHz; 0.305 kW @10 GHz; 0.273 kW @12.4 GHz; 0.224 kW @18 GHz