PS520L-28G-F Low Loss Phase Stable Coaxial Cable (28GHz)
Ultra-Low Loss Phase Stable Coaxial Cable (DC–28GHz)
Engineered for precision RF testing, high-frequency aerospace systems, and microwave communications. Featuring a low-density PTFE dielectric, triple-layer shielding, and durable FEP jacket, the PS520L-28G-F delivers exceptional phase stability against flexure and temperature variations.
Max Frequency:DC-28 GHz
Velocity of Prop.：76%
Phase Stability ：±0.2 °/GHz
Outer Diameter:5.2mm
Structure & Construction Characteristics
| Layer | Element | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|---|
| Inner Conductor | Center Conductor | Silver Plated Copper | 1 / 1.29 | 1.29 |
| Dielectric | Insulation | LD-PTFE | – | 3.91 |
| Inner Shield | Flat Ribbon Shield | Silver Plated Copper Strip | – | 4.12 |
| Interlayer | Barrier Tape | High Temperature Aluminium Foil | – | 4.26 |
| Outer Shield | Braided Shield | Silver Plated Copper Wire | – | 4.78 |
| Jacket | Outer Sheath | FEP | – | 5.20 |
Mechanical & Environmental Parameters
| Property | Value | Property | Value |
|---|---|---|---|
| Min. Bending Radius (Static) | 18.40 mm | Weight | 0.060 kg/m |
| Min. Bending Radius (Dynamic) | 46.00 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 Temperature (-45~+85°C) | ≤ 1500 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz (K1 = 0.856234, K2 = 0.0005906)
| Frequency (MHz) | Nom. Attenuation (dB/100m) | Max Power Handling (W @ 40°C & Sea Level) |
|---|---|---|
| 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-F serves as a direct form-fit-function replacement for standard SFT205 series high-frequency phase-stable cables, offering superior phase consistency and excellent thermal stability up to 200°C.
Frequently Asked Questions
What is the difference between PS520L-28G-F and TPU-jacketed alternatives?
The FEP jacket (“-F” suffix) allows an extended operating temperature range up to +200°C and offers chemical resistance, whereas TPU variants are optimized for higher dynamic flex resistance at lower temperature ceilings.
How is insertion loss calculated at custom frequencies?
Insertion loss can be precisely determined using the standard equation IL = K1 * sqrt(F_MHz) + K2 * F_MHz with constants K1 = 0.856234 and K2 = 0.0005906 for frequencies up to 28 GHz.
Why is triple-shielding utilized in PS520L-28G-F?
The combination of a Silver Plated Copper Strip inner shield, High Temperature Aluminium Foil interlayer, and Silver Plated Copper Wire outer shield ensures maximum isolation (>90 dB) and high phase stability under environmental exposure.
