PS400L-40G-GF Phase Stable Coaxial Cable
40GHz Max Frequency | Ultra-Low Loss | FEP Jacket Outer Protection
The PS400L-40G-GF is a precision 50-ohm phase-stable flexible coaxial cable optimized for high-frequency microwave and millimeter-wave systems up to 40GHz. Featuring low-density PTFE dielectric and double silver-plated copper shielding, it delivers exceptional phase stability under dynamic bending and thermal variations.
Max Frequency:DC-40GHz
Velocity of Prop.：83%
Inner ConductorStranded SPC (1/1.05mm)
Outer Diameter:4.0mm
Structure & Construction Characteristics
| Layer Structure | Material Specification | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper (SPC) | 1 / 1.05 | 1.05 |
| Insulation Dielectric | Low Density PTFE (LD-PTFE) | – | 2.90 |
| Inner Shield | Silver Plated Copper Strip | – | 3.10 |
| Outer Shield | Silver Plated Copper Wire Braid | – | 3.50 |
| Outer Jacket | Gray Fluorinated Ethylene Propylene (FEP) | – | 4.00 |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 20.0 mm | Operating Temperature | -55 °C to +165 °C |
|---|---|---|---|
| Min. Bending Radius (Dynamic) | 40.0 mm | Nominal Weight | 0.036 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 = 1.04317, K2 = 0.00018
| Frequency (MHz) | Nominal Attenuation (dB/100m @ 25°C) | Max Power Handling (W @ 40°C) |
|---|---|---|
| 500 | 23.42 | 892 |
| 1000 | 33.17 | 630 |
| 3000 | 57.68 | 362 |
| 6000 | 81.88 | 255 |
| 8000 | 94.74 | 220 |
| 9000 | 100.58 | 208 |
| 10000 | 106.12 | 197 |
| 12400 | 118.39 | 176 |
| 18000 | 143.20 | 146 |
| 26500 | 174.59 | 120 |
| 40000 | 215.83 | 97 |
Cross Reference / Direct Replacement
PS400L-40G-F serves as a high-performance direct drop-in replacement for standard Micro-Coax UFB142A and equivalent 0.160-inch outer diameter 40GHz phase-stable coaxial cable assemblies.
Frequently Asked Questions
How does the PS400L-40G-GF achieve phase stability up to 40GHz?
By integrating a microporous LD-PTFE dielectric layer paired with a helical silver-plated copper tape inner shield and braided outer shield, internal conductor displacement during movement is minimized, preventing phase deviation under dynamic flexure.
What is the benefit of the FEP jacket in high-frequency applications?
The extruded Gray FEP jacket offers excellent dielectric isolation, extreme temperature tolerance (-55°C to +165°C), and resistance to harsh environmental exposure without sacrificing flexibility or outer diameter profile (4.00mm).
How is attenuation calculated for frequencies not listed in the table?
System designers can compute accurate insertion loss using the official formula: IL = 1.04317 * sqrt(F_MHz) + 0.00018 * F_MHz in dB/100m at room temperature (25°C).
