PS760L-18G-AF 18GHz Low Loss Phase Stable Coaxial Cable
18GHz Phase-Stable Low-Loss Coaxial Cable (LD-PTFE High Density Dielectric)
Engineered for high-frequency RF systems requiring exceptional phase stability vs. bending and temperature. Features low-density PTFE dielectric combined with a robust double silver-plated copper shield and durable Aqua FEP jacket.
Max Frequency:DC-18GHz
Velocity of Prop.：77%
Phase Stability ：±0.3 °/GHz
Outer Diameter:7.6mm
Structure & Construction Characteristics
| Structure Element | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper | 1 / 2.06 | 2.06 |
| Insulation | LD-PTFE (Low-Density PTFE) | – | 6.05 |
| Inner Shield | Silver Plated Copper Strip | – | 6.25 |
| Outer Shield | Silver Plated Copper Wire Braid | – | 6.85 |
| Jacket | Aqua FEP | – | 7.60 |
Mechanical & Environmental Parameters
| Mechanical & Environmental Parameter | Value |
|---|---|
| Min Bending Radius (Static) | 38.00 mm |
| Min Bending Radius (Dynamic) | 76.00 mm |
| Weight | 0.135 kg/m |
| Operating Temperature | -55 to +165 ℃ |
Electrical & Mechanical Characteristics
| Parameter | Value |
|---|---|
| Impedance | 50 Ω |
| Capacitance | 87 pF/m |
| Velocity of Propagation (VP) | 77% |
| Max Operating Frequency | 18 GHz |
| Screening Effectiveness | > 90 dB |
| Dielectric Withstanding Voltage (DC) | 3000 V |
| Phase Change VS Bending | ±0.3 °/GHz |
| Phase Change VS Temperature (-45 to +85℃) | ≤ 1500 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Calculation Formula:
IL = K1 * sqrt(F_MHz) + K2 * F_MHz (dB/100m)
Constants: K1 = 0.4736052, K2 = 0.001186495
| Frequency (MHz) | Attenuation (dB/100m) | Power Handling (W @ 40℃) |
|---|---|---|
| 500 | 11.18 | 2756 |
| 1000 | 16.16 | 1907 |
| 3000 | 29.50 | 1045 |
| 4000 | 34.70 | 888 |
| 6000 | 43.80 | 704 |
| 8000 | 51.85 | 594 |
| 10000 | 59.23 | 520 |
| 12000 | 66.12 | 466 |
| 14000 | 72.65 | 424 |
| 16000 | 78.89 | 391 |
| 18000 | 84.90 | 363 |
Cross Reference & Replacement
The PS760L-18G-AF is designed as a direct Form-Fit-Function drop-in alternative to Astrolabe 32051, providing matching attenuation profile, phase stability, and mechanical dimensions.
Frequently Asked Questions
What makes PS760L-18G-AF suitable for phase-critical applications up to 18 GHz?
The combination of a Low-Density PTFE (LD-PTFE) dielectric and a dual silver-plated copper shield (strip + braid) ensures minimal phase shift over flexure (±0.3°/GHz) and temperature fluctuations (≤1500 PPM from -45°C to +85°C).
Can PS760L-18G-AF directly replace Astrolabe 32051 cable assemblies?
Yes. PS760L-18G-AF matches the electrical impedance (50 Ohm), velocity of propagation (77%), outer diameter (7.60 mm), and attenuation performance of Astrolabe 32051, making it a fully compatible cross-reference.
What are the environmental limits for the Aqua FEP jacket option?
The fluorinated ethylene propylene (FEP) jacket operates within -55°C to +165°C, offering excellent resistance to chemicals, moisture, and mechanical abrasion in demanding aerospace or test lab environments.
