PS560L-18G-F High Frequency Low Loss Phase Stable Coaxial Cable 5.6mm
Ultra-Low Insertion Loss & Exceptional Thermal Stability Rated Up to 18 GHz
Engineered for high-density precision microwave interconnects, the PS635L-18G-F combines expanded LD-PTFE dielectric insulation, a solid 1.57 mm silver-plated copper inner conductor, and a high-temperature Light Blue FEP jacket to achieve outstanding thermal endurance (-55°C to +200°C), superior flexibility, and low phase variation up to 18 GHz.
Max Frequency:DC-18 GHz
Velocity of Prop.：78%
Phase Stability ：±0.2 °/GHz
Outer Diameter:5.6mm
Structure & Construction Characteristics
| Layer | Element | Material | Construction (mm) | Nom. O.D. (mm) |
|---|---|---|---|---|
| Inner Conductor | Center Conductor | Silver Plated Copper | 1 / 1.40 | 1.40 |
| Dielectric | Insulation | LD-PTFE | – | 3.80 |
| Inner Shield | Flat Ribbon Shield | Silver Plated Copper Strip | – | 4.00 |
| Interlayer | Barrier Tape | High Temperature Aluminium Foil | – | 4.15 |
| Outer Shield | Braided Shield | Silver Plated Copper Wire | – | 4.80 |
| Jacket | Outer Sheath | FEP | – | 5.60 |
Mechanical & Environmental Parameters
| Min. Static Bend Radius | 25.00 mm | Min. Dynamic Bend Radius | 50.00 mm |
|---|---|---|---|
| Weight | 0.075 kg/m | Operating Temperature | -55°C to +200°C |
Electrical & Mechanical Characteristics
| Impedance | 50 Ω | Capacitance | 88 pF/m |
|---|---|---|---|
| Velocity of Propagation | 78% | Max Operating Frequency | 18 GHz |
| Screening Effectiveness | > 90 dB | Dielectric Withstanding Voltage | 2000 V DC |
| Phase Change vs. Bending | ±0.2 °/GHz | Phase Change vs. Temperature (-45~+85℃) | ≤ 1500 PPM |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Calculation: IL = K1 * sqrt(F_MHz) + K2 * F_MHz [dB/100m]
Constants: K1 = 0.785000, K2 = 0.000850
| Frequency (MHz) | Nominal Attenuation (dB/100m @ 25°C & Sea Level) | Max Power Handling (W @ 40°C & Sea Level) |
|---|---|---|
| 300 | 13.85 | 1,520 |
| 500 | 17.98 | 1,180 |
| 1000 | 25.68 | 820 |
| 2000 | 36.82 | 570 |
| 3000 | 45.55 | 460 |
| 6000 | 65.93 | 315 |
| 8000 | 77.03 | 270 |
| 10000 | 87.00 | 238 |
| 12400 | 97.98 | 210 |
| 16000 | 112.92 | 182 |
| 18000 | 120.68 | 170 |
The PS560L-18G-F low loss phase stable coaxial cable is engineered as a direct equivalent to industry-standard 0.220-inch / 5.60 mm high-frequency flexible coaxial cables such as Times Microwave SFT-205 / SFT205 and IW 1501, delivering matched 18 GHz Ku-band electrical performance, compact 5.60 mm outer diameter, and robust environmental resilience.
Frequently Asked Questions
Why choose a 5.60 mm outer diameter over larger 6.35 mm coaxial cables?
The 5.60 mm outer diameter allows tighter bend radii (25 mm static) and reduced overall cable harness weight while retaining excellent 18 GHz RF propagation properties, making it ideal for compact airborne radar, electronic warfare pods, and densely routed cabinet chassis.
How does the LD-PTFE dielectric enhance performance up to 18 GHz?
Low-Density PTFE (LD-PTFE) introduces controlled micro-voids in the dielectric structure, raising the velocity of propagation to 78% and lowering loss tangent. This results in minimal dielectric attenuation and stable phase performance across wide operating temperature ranges.
What shielding protection does the triple-layer construction provide?
Featuring a silver-plated copper strip inner shield, aluminum foil interlayer, and silver-plated copper braid outer shield, this triple-layer structure provides shielding effectiveness greater than 90 dB to prevent cross-talk and RF interference in high-density signal environments.
