Vinstronics phase-stable flexible RF cable structure for precision microwave interconnects

18 GHz Heavy-Duty PFA Ultra-Low-Loss High-Voltage Phase-Stable RF Cable W81

P/N: W81

  • Heavy-duty PFA for crush-resistant routing
  • Ultra-low-loss path for 18 GHz systems
  • High-voltage structure for power interconnects
  • Phase-stable transmission for precision systems
  • Built for radar and avionics environments
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Engineering Note
The W81 is an 18 GHz heavy-duty PFA ultra-low-loss high-voltage phase-stable flexible RF coaxial cable designed for precision microwave interconnects, avionics routing, phased array radar, ECM systems, and high-power RF assemblies where phase consistency, low insertion loss, voltage withstand, and crush-resistant cable protection are required. Its 8.10 mm gray PFA heavy-duty jacket provides reinforced environmental protection, while the LD PTFE dielectric, silver-plated copper inner conductor, silver-plated copper strip inner shield, and silver-plated copper braid outer shield support stable microwave signal transmission in demanding environments. The cable combines DC–18 GHz operating capability, <750 PPM phase stability, 2500 V.DC dielectric withstand voltage, -155 dBc low PIM performance, >90 dB shielding effectiveness, and 63.3 dB/100m attenuation at 18 GHz for ultra-low-loss phase-critical RF interconnect applications.

Technical Specifications

Cable Name W81
Product Type Heavy-Duty PFA Ultra-Low-Loss High-Voltage Phase-Stable Flexible RF Coaxial Cable
Cable Structure 5-layer phase-stable RF cable with heavy-duty gray PFA jacket
Operating Frequency DC–18 GHz
Cut-off Frequency 18 GHz
Impedance 50 ± 1 Ω
Velocity of Propagation 83%
Shielding Effectiveness >90 dB
Phase Stability <750 PPM @ -55 °C to +85 °C
Low PIM Performance -155 dBc
Dielectric Withstanding Voltage 2500 V.DC
Static Bending Radius 40 mm [1.575 in]
Dynamic Bending Radius 81 mm [3.189 in]
Weight 0.14 kg/m [0.0941 lbs/ft]
Temperature Range -55 to +165 °C [-67 to +329 °F]
Inner Conductor Silver-plated copper, 2.40 mm [0.094 in]
Dielectric Low Density PTFE, 6.36 mm [0.250 in]
Inner Shield Silver-plated copper strip, 6.60 mm [0.260 in]
Outer Shield Silver-plated copper wire braiding, 7.10 mm [0.280 in]
Jacket PFA / Gray, customizable, 8.10 mm [0.319 in]
Attenuation 13.7 dB/100m @1 GHz; 19.5 dB/100m @2 GHz; 24.1 dB/100m @3 GHz; 34.8 dB/100m @6 GHz; 40.6 dB/100m @8 GHz; 45.8 dB/100m @10 GHz; 51.5 dB/100m @12.4 GHz; 59.3 dB/100m @16 GHz; 63.3 dB/100m @18 GHz
Average Power 1.894 kW @1 GHz; 1.324 kW @2 GHz; 1.071 kW @3 GHz; 0.743 kW @6 GHz; 0.636 kW @8 GHz; 0.564 kW @10 GHz; 0.502 kW @12.4 GHz; 0.436 kW @16 GHz; 0.409 kW @18 GHz

Target Applications

Avionics RF Routing
Suitable for avionics assemblies where phase stability, high-voltage withstand, and heavy-duty PFA protection are required.

Phased Array Radar
Supports radar systems where phase consistency, ultra-low 18 GHz loss, and stable shielding are critical.

ECM Systems
Fits electronic countermeasure systems requiring shielded, phase-stable microwave interconnects in harsh environments.

High-Power Interconnects
Used for high-voltage RF paths and high-power interconnects requiring stable phase and ultra-low-loss transmission.

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