PSE510L-26.5G-F Phase Stable Coaxial Cable
26.5 GHz Low-Loss Interlayer-Shielded Precision RF Cable (FEP Jacket)
The PSE510L-26.5G-F is an advanced microwave coaxial cable operating up to 26.5 GHz. Engineered with an additional LD-PTFE insulation interlayer between the primary helical strip shield and secondary braided shield, it provides superior flex life, enhanced mechanical endurance, and ultra-stable phase performance under dynamic bending.
Max Frequency:DC-26.5GHz
Velocity of Prop.：83%
Inner ConductorStranded SPC (1/1.4mm)
Outer Diameter:5.1mm
Structure & Construction Characteristics
| Layer | Component | Material | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Center Conductor (1/1.40mm) | Silver Plated Copper | 1.40 |
| Insulation | Primary Dielectric Core | LD-PTFE (Low Density PTFE) | 3.75 |
| Inner Shield | Helical Tape Shield | Silver Plated Copper Strip | 3.95 |
| Interlayer | Isolation & Cushioning Layer | LD-PTFE | 4.25 |
| Outer Shield | Braided Shield | Silver Plated Copper Wire | 4.65 |
| Jacket | Protective Outer Sheath | Gray FEP | 5.10 |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 24.0 mm | Weight | 0.056 kg/m |
|---|---|---|---|
| Min. Bending Radius (Dynamic) | 48.0 mm | Operating Temperature | -55 ℃ to +165 ℃ |
Electrical & Mechanical Characteristics
| Impedance | 50 Ω | Velocity of Propagation | 83% |
|---|---|---|---|
| Capacitance | 80 pF/m | Max Operating Frequency | 26.5 GHz |
| Screening Effectiveness | ＞90 dB | Dielectric Withstanding Voltage | 1000 V DC |
| Phase Change vs Bending | ±0.3 °/GHz | Phase Change vs Temp. (-45~+85℃) | ≤ 750 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Calculation Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz (dB/100m)
K1 = 0.75040, K2 = 0.00033
| Frequency (MHz) | Nominal Attenuation (dB/100m @ 25℃) | Max Power Handling (W @ 40℃) |
|---|---|---|
| 300 | 13.10 | 1325 |
| 500 | 16.94 | 1024 |
| 1000 | 24.06 | 721 |
| 3000 | 42.09 | 412 |
| 6000 | 60.09 | 289 |
| 8000 | 69.74 | 249 |
| 10000 | 78.32 | 222 |
| 12400 | 87.63 | 198 |
| 18000 | 106.58 | 163 |
| 26500 | 130.85 | 133 |
| 30000 | 139.81 | 124 |
Industry Cross-Reference
The PSE510L-26.5G-F is engineered to directly replace the following industry standard high-reliability cables:
| Manufacturer | Reference Model |
|---|---|
| GORE | CXN3449 |
| IW | 1801 |
| Times Microwave | HF190 |
| Huber+Suhner | Sucoflex103 |
Frequently Asked Questions
What is the primary structural difference between PSE510L-26.5G-F and standard 4.8mm cables (e.g., PS480L-31G-F)?
PSE510L-26.5G-F integrates a 4.25mm LD-PTFE dielectric interlayer between the inner strip shield and outer braided shield. This expands the outer diameter to 5.10mm, offering higher mechanical strain relief, greater crush resistance, and extended flex life at the cost of a slightly lower cutoff frequency (26.5 GHz vs 31 GHz).
Why does PSE510L-26.5G-F have a lower power rating than non-interlayer variants despite having the same attenuation?
While attenuation constants (K1/K2) are identical due to matching conductor sizes, the added thermal impedance of the LD-PTFE interlayer slightly reduces heat dissipation efficiency, resulting in a conservative 133W power handling at 26.5 GHz (vs 158W on non-interlayer models).
How does the LD-PTFE interlayer improve phase stability under flexure?
The interlayer acts as a mechanical buffer, preventing direct friction and stress concentrations between the metallic strip and braid shields during movement. This guarantees high mechanical phase consistency (±0.3 °/GHz) over repeated dynamic bending cycles.
