PSE400-40G-BF
40GHz Ultra-Low Loss & Phase Stable Flexible Coaxial Cable
Engineered for demanding RF and microwave applications up to 40 GHz. Features low-density PTFE (LD-PTFE) dielectric insulation combined with a high-density double shielding system, ensuring minimal signal attenuation and exceptional phase stability under dynamic mechanical stress and thermal fluctuations.
Max Frequency:DC-40GHz
Velocity of Prop.：76%
Inner ConductorStranded SPC (1/0.91mm)
Outer Diameter:4.0mm
Structure & Construction Characteristics
| Layer | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper | 1 / 0.91 | 0.91 |
| Insulation | LD-PTFE (Low Density PTFE) | – | 2.70 |
| Inner Shield | Silver Plated Copper Strip | – | 2.90 |
| Interlayer | LD-PTFE | – | 3.15 |
| Outer Shield | Silver Plated Copper Wire Braid | – | 3.56 |
| Jacket | Blue FEP | – | 4.00 |
Electrical & Mechanical Characteristics
| Impedance | 50 Ohm | Velocity of Propagation | 76% |
| Max Operating Frequency | 40 GHz | Capacitance | 88 pF/m |
| Screening Effectiveness | > 90 dB | Dielectric Withstanding Voltage | 1200 V DC |
| Phase Change vs Bending | ±0.2 °/GHz | Phase Change vs Temp (-45~+85℃) | ≤ 1500 PPM |
Mechanical & Environmental Characteristics
| Min. Static Bending Radius | 16.00 mm | Min. Dynamic Bending Radius | 38.00 mm |
| Weight | 0.039 kg/m | Operating Temperature | -55℃ to +165℃ |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Formula: IL = K1 * sqrt(F_MHz) + K2 * F_MHz (dB/100m)
Constants: K1 = 1.232579, K2 = 0.000462
| Frequency (MHz) | Nom. Attenuation (dB/100m) | Max Power Handling (W @ 40℃) |
|---|---|---|
| 500 | 27.79 | 728 |
| 1000 | 39.44 | 513 |
| 2000 | 56.05 | 361 |
| 3000 | 68.90 | 294 |
| 6000 | 98.25 | 206 |
| 8000 | 113.94 | 178 |
| 10000 | 127.88 | 158 |
| 12400 | 142.98 | 142 |
| 18000 | 173.68 | 116 |
| 26500 | 212.89 | 95 |
| 40000 | 265.00 | 76 |
Cross-Reference & Form-Fit Interchangeability
PSE400-40G-BF offers direct mechanical and electrical interchangeability with industry standards, serving as a high-reliability direct equivalent for HUBER+SUHNER SUCOFLEX 102 assemblies in microwave test leads and system cabling.
Frequently Asked Questions
How does LD-PTFE dielectric improve phase stability compared to solid PTFE in high-frequency applications?
Low-Density PTFE (LD-PTFE) incorporates controlled microporous structures that lower the effective dielectric constant to achieve a velocity of propagation (VoP) of 76%. This significantly reduces phase drift caused by thermal expansion and mechanical flexing near room temperature phase transition points inherent to solid PTFE.
What shielding mechanism guarantees >90 dB screening effectiveness up to 40 GHz?
The PSE400-40G-BF utilizes a composite triple-layer outer architecture featuring a silver-plated copper strip inner shield, an LD-PTFE interlayer, and a high-coverage silver-plated copper wire outer braid. This combination eliminates microwave energy leakage and maintains robust shielding integrity up to 40 GHz.
What are the critical considerations when selecting between FEP and PUR outer jackets for millimeter-wave assemblies?
The FEP outer jacket (-BF variant) provides exceptional chemical inertness, low outgassing, and a wide operating temperature range (-55℃ to +165℃), ideal for aerospace and laboratory environments. For applications requiring extreme flexural fatigue resistance or rugged field deployment, polyurethane (PUR) jackets may be preferred.
