PS450L-40G-P Phase Stable Coaxial Cable
40GHz Max Frequency | Ultra-Low Loss | Robust Black TPU Outer Protection
The PS450L-40G-P is a high-grade 50-ohm flexible coaxial cable engineered for high-frequency microwave and millimeter-wave test applications up to 40GHz. Combining a microporous LD-PTFE dielectric with a double silver-plated copper shielding structure and rugged TPU jacket, it delivers superior flexure stability and environmental wear resistance.
Max Frequency:DC-40GHz
Velocity of Prop.：83%
Inner ConductorStranded SPC (1/0.96mm)
Outer Diameter:4.5mm TPU
Structure & Construction Characteristics
| Layer Structure | Material Specification | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper (SPC) | 1 / 0.96 | 0.96 |
| Insulation Dielectric | Low Density PTFE (LD-PTFE) | – | 2.65 |
| Inner Shield | Silver Plated Copper Strip | – | 2.85 |
| Outer Shield | Silver Plated Copper Wire Braid | – | 3.35 |
| Outer Jacket | Black Thermoplastic Polyurethane (TPU) | – | 4.50 |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 19.0 mm | Operating Temperature | -55 °C to +85 °C |
|---|---|---|---|
| Min. Bending Radius (Dynamic) | 38.0 mm | Nominal Weight | 0.033 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 = 0.986836837, K2 = 0.000547893
| Frequency (MHz) | Nominal Attenuation (dB/100m @ 25°C) | Max Power Handling (W @ 40°C) |
|---|---|---|
| 500 | 22.34 | 783 |
| 1000 | 31.75 | 551 |
| 3000 | 55.69 | 314 |
| 6000 | 79.73 | 219 |
| 8000 | 92.65 | 189 |
| 10000 | 104.16 | 168 |
| 12000 | 114.68 | 153 |
| 16000 | 133.59 | 131 |
| 18000 | 142.26 | 123 |
| 26500 | 175.16 | 100 |
| 40000 | 219.28 | 80 |
Cross Reference / Direct Replacement
PS450L-40G-P provides a direct technical equivalent to customized 0.177-inch / 4.50mm outer diameter TPU-jacketed 40GHz phase-stable coaxial cable assemblies.
Frequently Asked Questions
How does the double-shielded design of PS450L-40G-P optimize RF leakage and dynamic phase stability at 40GHz?
PS450L-40G-P employs a hybrid dual-shielding topology consisting of a helically wrapped silver-plated copper (SPC) tape inner layer and a high-density SPC wire braid outer layer. The inner flat tape eliminates longitudinal seam gaps under flexing, ensuring higher RF confinement (>90 dB screening effectiveness up to 40GHz), while the outer braid absorbs torsional stress to prevent dielectric deformation and phase degradation (±0.3 °/GHz).
What advantages does the Black TPU jacket offer over traditional FEP/PTFE jackets in field test assemblies?
Thermoplastic Polyurethane (TPU) provides vastly superior flexural fatigue resistance, tear strength, and abrasion resistance compared to rigid fluoropolymers. It allows a tight dynamic bending radius of 38.0 mm without kink formation or jacket splitting, making PS450L-40G-P the ideal choice for heavy-duty automated test equipment (ATE), outdoor microwave links, and repeated drag-chain deployments between -55°C and +85°C.
Why is Low-Density PTFE (LD-PTFE) critical for high-frequency phase-tracking cable systems?
The microporous structure of LD-PTFE lowers the dielectric constant, enabling a high Velocity of Propagation (83 %) and significantly reduced dielectric absorption. This minimizes thermal-induced dielectric expansion, restricting phase variation across severe thermal gradients ((-45~+85°C)
