PS500L-31G-F Low Loss Phase Stable Coaxial Cable | Up to 31GHz
Low Loss Phase Stable RF Coaxial Cable (Up to 31 GHz)
Designed for high-frequency measurement, defense systems, and thermal-demanding environments up to 31 GHz. Features a solid silver-plated copper conductor, LD-PTFE dielectric, and high-temp Fluorinated Ethylene Propylene (FEP) outer jacket.
Max Frequency:DC-31GHz
Velocity of Prop.：77%
Phase Stability ：±0.2 °/GHz
Outer Diameter:5.0mm
Structure & Construction Characteristics
| Structure Layer | Item | Material | Construction / Dimension |
|---|---|---|---|
| Inner Conductor | Material & Stranding | Silver Plated Copper | 1 / 1.29 mm (Solid, Nom. O.D. 1.29 mm) |
| Insulation | Dielectric Material | LD-PTFE (Low Density PTFE) | Nom. O.D. 3.80 mm |
| Inner Shield | Wrapping Layer | Flat Silver Plated Copper Wrapped Strip | Nom. O.D. 4.00 mm |
| Outer Shield | Braid Layer | Round Silver Plated Copper Braided Wire | Nom. O.D. 4.40 mm |
| Jacket | Outer Protective Layer | Aqua FEP | Nom. O.D. 5.00 mm |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 18.40 mm | Weight | 0.068 kg/m |
| Min. Bending Radius (Dynamic) | 50.00 mm | Operating Temperature | -55 to +165 ℃ |
Electrical & Mechanical Characteristics
| Impedance | 50 Ohm | Max Operating Frequency | 31 GHz |
| Capacitance | 88 pF/m | Screening Effectiveness | > 90 dB |
| Velocity of Propagation | 77% | Dielectric Withstanding Voltage | 2000 V @ DC |
| Phase Change vs. Bending | ±0.2 °/GHz | Phase Change vs. Temp (-45~+85℃) | ≤ 1500 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Attenuation Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz
Constants: K1 = 0.749173771 | K2 = 0.001179495
| Frequency (MHz) | Nominal Attenuation (dB/100m) | Max Power Handling (W) |
|---|---|---|
| 500 | 17.34 | 1194 |
| 1000 | 24.87 | 833 |
| 2400 | 39.53 | 524 |
| 3000 | 44.57 | 465 |
| 6000 | 65.11 | 318 |
| 8000 | 76.44 | 271 |
| 10000 | 86.71 | 239 |
| 12400 | 98.05 | 211 |
| 18000 | 121.74 | 170 |
| 20000 | 129.54 | 160 |
| 26500 | 153.21 | 135 |
Replaceable / Cross Reference Equivalents
The PS500L-31G-F is engineered as a direct equivalent for high-frequency low-loss millimeter-wave coaxial cables.
Frequently Asked Questions
How does the PS500L-31G-F maintain phase stability during dynamic or static bending?
Utilizing a Micro-Porous Low-Density PTFE (LD-PTFE) dielectric combined with a precision-engineered helical flat copper strip and braid shield, the cable limits bending-induced phase variation to within ±0.2 °/GHz. This structural configuration minimizes internal dielectric stress during flexure, ensuring consistent electrical length and exceptional phase repeatability for high-frequency test interconnects, phased-array radars, and precision vector network analyzer (VNA) assemblies operating up to 31 GHz.
What advantages does the composite flat tape and braid double shielding offer at millimeter-wave frequencies?
The inner shield employs a helically wrapped silver-plated copper flat tape that delivers 100% physical coverage, significantly reducing surface attenuation and skin-effect losses at higher microwave frequencies. Overlaid with a high-density silver-plated copper wire braid, this composite dual-layer architecture guarantees a screening effectiveness exceeding >90 dB. It effectively eliminates signal leakage and provides high electromagnetic immunity (EMI/RFI) in densely packed RF environments.
How does the Fluorinated Ethylene Propylene (FEP) outer jacket ensure long-term environmental and thermal reliability?
The extruded Fluorinated Ethylene Propylene (FEP) jacket offers high thermal endurance across a broad operating temperature window from-55 to +165 ℃, maintaining a low phase change coefficient vs. temperature ≤ 1500 PPM between-45 to +85 ℃. Additionally, FEP provides complete chemical inertness, UV resistance, and high mechanical toughness, protecting the internal shielding layers from environmental degradation and mechanical abrasion in harsh industrial or aerospace deployments.
