PS540LS-26.5G-F
High Frequency Low Loss Flexible Coaxial Cable (DC–26.5GHz, Stranded Conductor)
Engineered with a high-flexibility 19-strand inner conductor, LD-PTFE dielectric, and FEP outer jacket to achieve superior flexure endurance and microwave phase stability up to 26.5GHz. Designed specifically for high-flex test assemblies, airborne radar systems, and cramped enclosure routing.
Max Frequency:DC-26.5GHz
Velocity of Prop.：83%
Screening Effectiveness: > 90 dB
Outer Diameter:5.4mm
Structure & Construction Characteristics
| Construction Part | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Stranded Silver Plated Copper (SPC) | 19 / 0.32 | 1.60 |
| Insulation | Low-Density PTFE (LD-PTFE) | – | 4.35 |
| Inner Shield | Silver Plated Copper Strip | Helical Wrap | 4.55 |
| Outer Shield | Silver Plated Copper Wire | Braid Coverage | 4.95 |
| Jacket | Gray Fluorinated Ethylene Propylene (FEP) | – | 5.40 |
Mechanical & Environmental Parameters
| Parameter | Standard Value | Parameter | Standard Value |
|---|---|---|---|
| Min. Bending Radius (Static) | 27.0 mm | Weight | 0.075 kg/m |
| Min. Bending Radius (Dynamic) | 54.0 mm | Operating Temperature | -55 ℃ to +165 ℃ |
Electrical & Mechanical Characteristics
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Impedance | 50 Ω | Dielectric Withstanding Voltage | 2000 V DC |
| Capacitance | 80 pF/m | Phase Change vs. Bending | ±0.3 °/GHz |
| Velocity Ratio (Velocity of Propagation) | 83% | Phase Change vs. Temp. (-45 to +85℃) | ≤ 750 PPM |
| Max Operating Frequency | 26.5 GHz | Screening Effectiveness | > 90 dB |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Calculation Formula:
IL = K1 * sqrt(F_MHz) + K2 * F_MHz (dB/100m)
Constants: K1 = 0.779036, K2 = 0.000770
| Frequency (MHz) | Nominal Attenuation (@25℃, Sea Level) (dB/100m) | Max Power Handling (@40℃, Sea Level) (W) |
|---|---|---|
| 300 | 13.72 | 1780 |
| 500 | 17.80 | 1372 |
| 1000 | 25.40 | 962 |
| 3000 | 44.98 | 543 |
| 6000 | 64.96 | 376 |
| 8000 | 75.84 | 322 |
| 10000 | 85.60 | 285 |
| 12400 | 96.29 | 254 |
| 18000 | 118.37 | 206 |
| 20000 | 125.57 | 195 |
| 26500 | 147.21 | 166 |
Direct Drop-in Replacement Compatibility
The PS540LS-26.5G-F is functionally and dimensionally equivalent to industry-standard high-frequency phase-stable cables including 33201 / SF142B and equivalent 5.40mm (0.213″) low-loss PTFE flexible coaxial cables, delivering matching mechanical tolerances, low attenuation, and high phase stability.
Frequently Asked Questions
What is the primary advantage of the stranded inner conductor in PS540LS-26.5G-F?
The 19-strand silver-plated copper inner conductor (19/0.32mm) significantly enhances cable mechanical flexibility and flex life compared to solid conductor designs, preventing conductor fatigue and cracking in high-flexure dynamic setups.
How does PS540LS-26.5G-F maintain high phase stability up to 26.5GHz?
By combining ultra-low density PTFE (LD-PTFE) dielectric with an 83% velocity ratio and dual tape/braid shielding, PS540LS-26.5G-F maintains a low phase variation of ±0.3 °/GHz during flexure and ≤ 750 PPM over -45℃ to +85℃.
What is the recommended minimum bending radius for static vs dynamic environments?
For static fixed installations, the minimum bend radius is 27.0 mm. For dynamic applications requiring recurring movement, the recommended minimum bend radius is 54.0 mm.
