SRFS Teleinfra

FU550 Ultra-Flexible Phase Stable Low Loss RF Cable

FU550 Ultra-Flexible Phase Stable Low Loss RF Cable

The Ultra-Flexible Phase Stable Low Loss Cable FU550 is a high-performance RF cable engineered for reliable signal transmission and precision applications. Its ultra-flexible construction enables easy routing and repeated movement while maintaining excellent mechanical durability. The phase-stable design helps deliver consistent electrical performance with minimal phase variation during flexing. With low signal loss and effective shielding, FU550 is suitable for demanding RF and microwave environments. It is ideal for test and measurement equipment, network analyzers, antenna systems, communication equipment, laboratory setups, and other high-frequency applications requiring flexibility, accuracy, and dependable signal integrity.

Cable Construction

No. Construction Size (mm) Materials
1 Center Conductor 1.44 Stranded silver plated copper
2 Dielectric 1.60 LD PTFE wrapping
3 Outer Conductor 4.20 Silver plated copper strip wrapping
4 Interlayer 4.55 PTFE
5 Outer Shield 5.00 Silver plated copper wire braiding
6 Jacket 5.50 FEP (Green or Light Blue)

Electrical

Frequency DC-26.5 GHz
Impedance 50 Ω
Velocity of Propagation 83%
Shielding Effectiveness >90 dB
Withstanding Voltage 1500 V
*Mechanical Phase Stability <±3°@18GHz, <±7°@26.5GHz
Amplitude Stability vs Shaking <±0.1dB to 18 GHz, <±0.2dB
* Wrapped 360° around a 55mm radius mandrel.

Mechanical & Environmental

Min. Bending Radius Static 28mm
Min. Bending Radius Repeated 55mm
Weight 63g/m
Operation Temp -50~150 °C

Bulk Cable Attenuation

Frequency MHz 300 1000 2000 3000 6000 8000 10000 12000 14000 18000 20000 26500
dB/100 Meter 14.2 26.6 38.3 47.6 69.5 81.5 92.4 102.6 112.0 129.7 138.0 163.1
Avg. Power kW 1.380 0.740 0.513 0.413 0.283 0.241 0.213 0.192 0.175 0.152 0.143 0.121
Attenuation at any frequency = [0.801100×SQRT(FMHz)] + [0.001233×FMHz]