PS400L-40G-P Phase Stable Coaxial Cable
40GHz Max Frequency | Ultra-Low Loss | Heavy-Duty Black PUR Outer Protection
The PS400L-40G-P is an ultra-flexible 50-ohm phase-stable coaxial cable engineered for high-frequency microwave testing and military-grade applications up to 40GHz. Combining a microporous LD-PTFE dielectric with a dual silver-plated copper shield and flexible Polyurethane (PUR) jacket, it delivers optimum phase stability and mechanical durability.
Max Frequency:DC-40GHz
Velocity of Prop.：83%
Inner ConductorStranded SPC (1/0.91mm)
Outer Diameter:4.0mm PUR
Structure & Construction Characteristics
| Layer Structure | Material Specification | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper (SPC) | 1 / 0.91 | 0.91 |
| Insulation Dielectric | Low Density PTFE (LD-PTFE) | – | 2.50 |
| Inner Shield | Flat Silver Plated Copper Wrapped Strip | – | 2.66 |
| Outer Shield | Round Silver Plated Copper Braided Wire | – | 3.11 |
| Outer Jacket | Black Polyurethane (PUR) | – | 4.00 |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 16.0 mm | Operating Temperature | -55 °C to +165 °C |
|---|---|---|---|
| Min. Bending Radius (Dynamic) | 36.0 mm | Nominal Weight | 0.032 kg/m |
Electrical & Mechanical Characteristics
| Impedance | 50 Ω | Max Operating Frequency | 40 GHz |
|---|---|---|---|
| Capacitance | 80 pF/m | Screening Effectiveness | > 90 dB |
| Velocity of Propagation | 83 % | Dielectric Withstanding Voltage | 1000 V DC |
| Phase Change vs Bending | ±0.3 °/GHz | Phase Change vs Temp (-45~+85°C) | ≤ 750 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz | K1 = 1.16847, K2 = 0.00055
| 500 | 26.40 | 725 |
| 1000 | 37.50 | 510 |
| 3000 | 65.65 | 292 |
| 4000 | 76.10 | 252 |
| 6000 | 93.81 | 204 |
| 8000 | 108.91 | 176 |
| 10000 | 122.35 | 156 |
| 12400 | 136.94 | 140 |
| 18000 | 166.67 | 115 |
| 26500 | 204.79 | 93 |
| 40000 | 255.69 | 75 |
Cross Reference / Direct Replacement
PS400L-40G-P serves as a flexible, high-durability direct alternative for 4.00mm O.D. 40GHz phase-stable coax assemblies requiring high bending cycles and PUR protection.
Frequently Asked Questions
How does the PUR jacket on PS400L-40G-P perform in dynamic robotic and field test environments?
Polyurethane (PUR) offers outstanding resistance to mechanical abrasion, oil exposure, and repeated torsional strain. It enables a dynamic bend radius down to 36.0 mm without compromising internal shielding geometry or electrical phase tracking.
What structural mechanism minimizes phase change during bending at 40GHz?
The flat silver-plated copper wrapped inner shield reduces internal friction between the dielectric and outer braid during movement, maintaining phase change within ±0.3 °/GHz across the entire 40GHz bandwidth.
How to calculate precise attenuation values across millimeter-wave frequencies?
Insertion loss in dB/100m at room temperature (25°C) can be calculated using the polynomial formula: IL = 1.16847 * sqrt(F_MHz) + 0.00055 * F_MHz.
