40 GHz Balanced High-Temperature Phase-Stable RF Cable IR40
P/N: IR40
– Balanced format for 40 GHz thermal paths
– 4.00 mm jacket supports practical routing
– Phase-stable cable for stationary assemblies
– Shielded path for harsh RF environments
– Built for high-temperature test setups
Engineering Note
The IR40 / VXIR400 is a balanced high-temperature phase-stable RF coaxial cable for 40 GHz stationary microwave paths that need a practical tradeoff between routing flexibility, attenuation, and thermal survivability. Compared with the more compact IR36, its 4.00 mm PI + PTFE jacket and 82% velocity support lower loss and higher average power while preserving confirmed 1000 VDC dielectric withstand voltage, >90 dB shielding effectiveness, and 400 °C / 400 s high-temperature endurance for thermal RF test setups, onboard links, and harsh-environment phase-sensitive assemblies.
Technical Specifications
| Cable Name | IR40 |
|---|---|
| Part No | VXIR400 |
| Product Type | High-temperature phase-stable RF coaxial cable |
| Cable Structure | 6-layer construction with silver-plated copper center conductor, LD PTFE dielectric, silver-plated copper tape inner shield, LD PTFE interlayer, silver-plated copper wire outer shield, and PI + PTFE outer jacket |
| Operating Frequency | 40 GHz |
| Cut-off Frequency | 56 GHz |
| Impedance | 50 Ω |
| Velocity of Propagation | 82% |
| Shielding Effectiveness | >90 dB |
| Dielectric Withstanding Voltage | 1000 VDC |
| Static Bending Radius | 20 mm |
| Dynamic Bending Radius | 40 mm |
| Weight | 0.029 kg/m |
| Storage Temperature | -55 °C to +125 °C |
| High-Temp Endurance | 400 °C @ 400 s |
| Center Conductor | Silver-plated copper, 0.91 mm |
| Dielectric | LD PTFE, 2.50 mm |
| Inner Shield | Silver-plated copper tape, 2.66 mm |
| Interlayer | LD PTFE, 2.95 mm |
| Outer Shield | Silver-plated copper wire, 3.35 mm |
| Outer Jacket | PI + PTFE, 4.00 mm |
| Outer Diameter | 4.00 mm |
Attenuation
| Frequency (MHz) | 1000 | 2000 | 3000 | 6000 | 8000 | 10000 | 12400 | 18000 | 26500 | 40000 |
|---|---|---|---|---|---|---|---|---|---|---|
| Attenuation (dB/100 m) | 41.2 | 58.6 | 72.0 | 102.9 | 119.4 | 134.0 | 149.9 | 182.3 | 223.8 | 279.1 |
Average Power
| Frequency (MHz) | 1000 | 2000 | 3000 | 6000 | 8000 | 10000 | 12400 | 18000 | 26500 | 40000 |
|---|---|---|---|---|---|---|---|---|---|---|
| Average Power (kW) | 0.509 | 0.358 | 0.291 | 0.204 | 0.176 | 0.156 | 0.140 | 0.115 | 0.094 | 0.075 |
Target Applications
Thermal RF Test Setups
40 GHz stationary test paths where high-temperature exposure, shielding, and practical routing flexibility must be kept in balance.
High-Temperature Onboard Links
Onboard RF paths exposed to elevated thermal stress where a 4.00 mm cable format gives more electrical margin than smaller formats.
Harsh-Environment Routing
Cable runs that need both manageable bending and thermal survivability inside demanding microwave systems.
Phase-Sensitive RF Assemblies
Stationary RF assemblies where phase-stable cable category, multilayer shielding, and 40 GHz operation support measurement continuity.
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