PS740L-20G-F
High Frequency Low Loss Phase Stable Coaxial Cable (DC–20GHz, FEP Jacket)
Engineered with ultra-low density PTFE dielectric, durable FEP jacket, and precision dual-shielding technology for superior phase stability vs. bending and temperature. Ideal for microwave radar, electronic countermeasures, test & measurement setups, and high-frequency communication systems.
Max Frequency:DC-20GHz
Velocity of Prop.：83%
Screening Effectiveness: > 90 dB
Outer Diameter:7.4mm
Structure & Construction Characteristics
| Construction Part | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper (SPC) | 1 / 2.10 | 2.10 |
| Insulation | Low-Density PTFE (LD-PTFE) | – | 5.75 |
| Inner Shield | Silver Plated Copper Strip | Helical Wrap | 6.07 |
| Outer Shield | Silver Plated Copper Wire | Braid Coverage | 6.60 |
| Jacket | Gray Fluorinated Ethylene Propylene (FEP) | – | 7.40 |
Mechanical & Environmental Parameters
| Min. Bending Radius (Static) | 25.5 mm | Weight | 0.116 kg/m |
| Min. Bending Radius (Dynamic) | 51.0 mm | Operating Temperature | -55 ℃ to +165 ℃ |
Electrical & Mechanical Characteristics
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Impedance | 50 Ω | Dielectric Withstanding Voltage | 2100 V DC |
| Capacitance | 80 pF/m | Phase Stability vs. Bending | ±0.3 °/GHz |
| Velocity Ratio (Velocity of Propagation) | 83% | Phase Stability vs. Temp. (-45 to +85℃) | ≤ 750 PPM |
| Max Operating Frequency | 20 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 = 0.526279, K2 = 0.000104
| Frequency (MHz) | Nominal Attenuation (@25℃, Sea Level) (dB/100m) | Max Power Handling (@40℃, Sea Level) (W) |
|---|---|---|
| 300 | 9.15 | 3185 |
| 500 | 11.82 | 2465 |
| 1000 | 16.75 | 1740 |
| 2000 | 23.74 | 1227 |
| 3000 | 29.14 | 1000 |
| 6000 | 41.39 | 704 |
| 8000 | 47.90 | 608 |
| 10000 | 53.67 | 543 |
| 12400 | 59.89 | 486 |
| 18000 | 72.48 | 402 |
| 20000 | 76.51 | 381 |
Direct Drop-in Replacement Compatible
The PS740L-20G-F is functionally and dimensionally equivalent to industry-standard high-frequency phase-stable cables including GORE CXN3450, delivering identical microwave phase stability and low attenuation specs.
Frequently Asked Questions
How does PS740L-20G-F achieve low loss and phase stability up to 20GHz?
The PS740L-20G-F uses a Low-Density PTFE (LD-PTFE) dielectric which increases velocity ratio to 83%, reducing dielectric loss while minimizing phase change under physical bending (±0.3 °/GHz) and temperature fluctuations (≤ 750 PPM).
What is the equivalent industry model for PS740L-20G-F?
PS740L-20G-F serves as a direct alternative to GORE CXN3450, offering matching mechanical dimensions (7.40mm outer diameter with FEP jacket), shielding performance (>90dB), and attenuation specs.
What are the minimum bend radius requirements for dynamic vs. static installations?
For static fixed routing, the minimum bend radius is 25.5 mm. For dynamic flexibility or recurring motion setups, the recommended minimum bend radius is 51.0 mm.
