PS520L-28G-P Low Loss Phase Stable Coaxial Cable (28GHz)
Ultra-Low Loss Phase Stable Coaxial Cable (DC–28GHz)
Engineered for precision RF testing, aerospace, and high-frequency microwave communications. Featuring a low-density PTFE dielectric and triple-layer shielding, the PS520L-28G-P delivers outstanding phase stability against flexure and temperature variation up to 28 GHz.
Max Frequency:DC-28 GHz
Velocity of Prop.：76%
Phase Stability ：±0.2 °/GHz
Outer Diameter:6.0mm
Structure & Construction Characteristics
| Layer | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper | 1 / 1.29 | 1.29 |
| Insulation | LD-PTFE (Low Density PTFE) | – | 3.91 |
| Inner Shield | Silver Plated Copper Strip | – | 4.12 |
| Interlayer | High Temperature Aluminum Foil | – | 4.26 |
| Outer Shield | Silver Plated Copper Braid | – | 4.78 |
| Jacket | Black TPU | – | 6.00 |
Mechanical & Environmental Parameters
| Property | Value | Property | Value |
|---|---|---|---|
| Min. Bending Radius (Static) | 18.00 mm | Weight | 0.060 kg/m |
| Min. Bending Radius (Dynamic) | 36.00 mm | Operating Temperature | -55°C to +200°C |
Electrical & Mechanical Characteristics
| Impedance | 50 Ohm | Velocity of Propagation | 76% |
| Capacitance | 88 pF/m | Screening Effectiveness | > 90 dB |
| Max. Operating Frequency | 28 GHz | Dielectric Withstanding Voltage | 1800 V DC |
| Phase Change vs. Bending | ±0.2° / GHz | Phase Change vs. Temp (-45~+85°C) | ≤ 1500 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz (where K1 = 0.856234, K2 = 0.0005906)
| Frequency (MHz) | Nom. Attenuation (dB/100m) | Max. Power Handling (W @ 40°C) |
|---|---|---|
| 500 | 19.44 | 1065 |
| 1000 | 27.67 | 749 |
| 2400 | 43.36 | 478 |
| 3000 | 48.67 | 426 |
| 6000 | 69.87 | 296 |
| 8000 | 81.31 | 255 |
| 10000 | 91.53 | 226 |
| 12400 | 102.67 | 202 |
| 18000 | 125.51 | 165 |
| 20000 | 132.90 | 156 |
| 26500 | 155.04 | 134 |
Cross-Reference & Compatibility
PS520L-28G-P is designed as a direct high-reliability replacement for standard 0.200-inch phase-stable flexible microwave cables, offering enhanced shielding efficacy and superior phase consistency across thermal cycles.
Frequently Asked Questions
How does the triple-layer shield affect mechanical flexibility?
The combination of a silver-plated copper strip inner shield, aluminum foil interlayer, and outer braid provides maximum RF isolation (>90 dB) while maintaining a dynamic bend radius of 36.00 mm without causing mechanical fatigue or phase jumps.
What makes LD-PTFE superior to solid PTFE dielectrics?
Low-Density PTFE (LD-PTFE) achieves a higher velocity of propagation (76%) and lower dielectric attenuation, significantly reducing phase variation across the operating temperature range (-55°C to +200°C).
What is the significance of the attenuation coefficient formula?
The formula IL = K1 * sqrt(F_MHz) + K2 * F_MHz with constants K1=0.856234 and K2=0.0005906 allows system engineers to accurately calculate total insertion loss at any custom frequency point up to 28 GHz.
