PS760L-18G-BF Low Loss Phase Stable Coaxial Cable (DC-18GHz)
High-Performance Phase Stable Cable Operating up to 18 GHz
PS760L-18G-BF is an advanced 50 Ohm low-loss RF coaxial cable constructed with an LD-PTFE dielectric, dual-shielding system, and a durable Blue FEP jacket. Designed to deliver consistent RF performance, superior screening effectiveness (>90 dB), and high power-handling capability across microwave frequencies.
Max Frequency:DC-18GHz
Velocity of Prop.：83%
Screening Effectiveness: > 90 dB
Outer Diameter:7.6mm
Structure & Construction Characteristics
| Layer | Material | Nom. O.D. (mm) |
|---|---|---|
| Inner Conductor | Silver Plated Copper (1/2.30) | 2.30 |
| Insulation | LD-PTFE (Low Density PTFE) | 6.25 |
| Inner Shield | Self-adhesive Aluminium Foil | 6.33 |
| Outer Shield | Silver Plated Copper Wire Braid | 6.84 |
| Jacket | Blue FEP | 7.60 |
Mechanical & Environmental Parameters
| Parameter | Specification Value |
|---|---|
| Min. Bending Radius (Single) | 38 mm |
| Min. Bending Radius (Repeated) | 76 mm |
| Operating Temperature Range | -55°C to +165°C |
Electrical & Mechanical Characteristics
| Parameter | Specification Value |
|---|---|
| Impedance | 50 ± 1.5 Ω |
| Capacitance | 88 pF/m |
| Velocity of Propagation | 83% |
| Max. Operating Frequency | 18 GHz |
| Screening Effectiveness | > 90 dB |
| Dielectric Withstanding Voltage | 3000 V@DC |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Formula:
IL = K1 * √(F_MHz) + K2 * F_MHz | K1 = 0.448000, K2 = 0.000898
| Frequency (MHz) | Nominal Attenuation (dB/100m) | Power Handling (W) |
|---|---|---|
| 300 | 8.03 | 2669 |
| 500 | 10.47 | 2669 |
| 1000 | 15.07 | 1422 |
| 2000 | 21.83 | 982 |
| 3000 | 27.23 | 787 |
| 6000 | 40.09 | 535 |
| 8000 | 47.25 | 453 |
| 10000 | 53.78 | 398 |
| 12400 | 61.02 | 351 |
| 15000 | 68.34 | 314 |
| 18000 | 76.27 | 281 |
PS760L-18G-BF is designed as a direct Form-Fit-Function (FFF) high-reliability equivalent to industry-standard 0.300″ (7.60mm) outer diameter low-loss phase-stable coaxial cables operating up to 18 GHz (e.g., IW1501 / LMR-300 class low-loss flexible cables).
| Comparison Parameter | Standard Commercial Flexible Cables | PS760L-18G-BF (Engineered Grade) |
|---|---|---|
| Dielectric Material | Solid PTFE or Standard Foam PE | Low-Density PTFE (LD-PTFE) (Higher Vp 83%) |
| Shielding Effectiveness | Single Braid (< 60 dB) or Foil+Braid (~80 dB) | Dual Shield (Al-Foil + SPC Braid) > 90 dB |
| Phase Stability vs Temp | PPM high phase transition around 19°C (PTFE knee) | Optimized Thermal Phase Tracking (-55°C to +165°C) |
| Attenuation (@18 GHz) | > 95 dB / 100m | 76.27 dB / 100m |
Frequently Asked Questions
How does the LD-PTFE dielectric in PS760L-18G-BF outperform standard Solid PTFE cables in high-frequency applications?
Low-Density PTFE (LD-PTFE) introduces micro-porous air structures into the dielectric matrix, lowering the relative permittivity (εr) closer to air. This results in a higher Velocity of Propagation (83% Vp vs. 69% in solid PTFE) and significantly reduces dielectric dissipation factor (tan δ). Consequently, attenuation is drastically reduced at microwave frequencies up to 18 GHz, while phase stability under mechanical flexing and thermal fluctuation is significantly enhanced.
What cable connectors are compatible with the 7.60mm (0.300″) dimensions of PS760L-18G-BF?
PS760L-18G-BF features a 2.30mm inner conductor and 6.25mm dielectric outer diameter. It is fully compatible with standard precision 18 GHz RF connectors designed for 0.300″ low-loss cables, including SMA (M/F), Type N, TNC, and 3.5mm connectors utilizing clamp/crimp outer attachment and solder/captive inner pin terminations.
Why is the dual-layer shielding structure critical for modern EMI/EMC environments?
PS760L-18G-BF utilizes a inner self-adhesive aluminium foil layer combined with an outer Silver Plated Copper (SPC) wire braid. This hybrid construction achieves a Shielding Effectiveness > 90 dB across DC-18 GHz. The solid foil layer provides 100% coverage preventing high-frequency aperture leakage, while the SPC braid guarantees high mechanical tensile strength and ultra-low DC resistance for optimal ground loop suppression.
