PS520LS-25G-F Flexible Stranded Coaxial Cable (DC-25GHz)
High-Flexibility Phase Stable Cable Operating up to 25 GHz
PS520LS-25G-F is engineered with a 19/0.29 stranded silver-plated copper inner conductor designed for high flexure, continuous movement, and dynamic routing environments up to 25 GHz. Featuring an LD-PTFE dielectric and double shielding, it balances superior flex fatigue resistance with ultra-low loss transmission.
Max Frequency:DC-25GHz
Velocity of Prop.：83%
Screening Effectiveness: > 90 dB
Outer Diameter:5.2mm
Structure & Construction Characteristics
| Layer | Material | Construction / Spec | Nom. O.D. (mm) |
|---|---|---|---|
| Inner Conductor | Silver Plated Copper (SPC) | 19 / 0.29 (Stranded) | 1.45 |
| Insulation | LD-PTFE (Low Density PTFE) | Solid Tape Wrapped | 4.20 |
| Inner Shield | Self-adhesive Aluminium Foil | Helical Wrap | 4.28 |
| Outer Shield | Silver Plated Copper Wire Braid | Woven Braid | 4.73 |
| Jacket | Blue FEP | Extruded Solid | 5.20 |
Mechanical & Environmental Parameters
| Parameter | Specification Value |
|---|---|
| Conductor Type | 19-strand Flex-optimized Silver Plated Copper |
| Min. Bending Radius (Single) | 25 mm |
| Min. Bending Radius (Repeated) | 50 mm |
| Operating Temperature Range | -55°C to +85°C |
Electrical & Mechanical Characteristics
| Parameter | Specification Value |
|---|---|
| Impedance | 50 ± 1.5 Ω |
| Capacitance | 88 pF/m |
| Velocity of Propagation | 83% |
| Max. Operating Frequency | 25 GHz |
| Screening Effectiveness | > 90 dB |
| Dielectric Withstanding Voltage | 2000 V@DC |
Attenuation & Power Handling @ 25℃ & Sea Level
Insertion Loss Formula:
IL = K1 * √(F_MHz) + K2 * F_MHz | K1 = 1.005200, K2 = 0.001088
| Frequency (MHz) | Nominal Attenuation (dB/100m) | Power Handling (W) |
|---|---|---|
| 300 | 17.74 | 1158 |
| 500 | 23.02 | 891 |
| 1000 | 32.88 | 624 |
| 2000 | 47.13 | 435 |
| 3000 | 58.31 | 352 |
| 6000 | 84.40 | 243 |
| 8000 | 98.67 | 208 |
| 10000 | 111.40 | 184 |
| 12400 | 125.71 | 163 |
| 15000 | 140.00 | 146 |
| 18000 | 155.45 | 132 |
| 25000 | 186.14 | 110 |
Engineering Cross Reference & High-Flex Drop-in Replacement Guide
PS520LS-25G-F is engineered as a direct high-flexibility Form-Fit-Function (FFF) replacement for standard 5.20mm (0.200″) solid-center RF coaxial cables where dynamic flex life and resistance to work-hardening are critical.
| Comparison Parameter | Standard Solid-Conductor Cables | PS520LS-25G-F (Stranded Flex Series) |
|---|---|---|
| Center Conductor Construction | Solid Single-Wire (1/1.45 mm) | 19-Strand Silver Plated Copper (19/0.29 mm) |
| Flex-Fatigue Resistance | Prone to micro-cracking / fracture on bend | High Dynamic Flex Life (Repeated Radius: 50mm) |
| Max Frequency Range | Typically 18 GHz – 26.5 GHz | 25 GHz |
| Dielectric Material | Solid PTFE or Standard Foam | Low-Density PTFE (LD-PTFE, Vp 83%) |
Frequently Asked Questions
What mechanical advantage does the 19/0.29 stranded conductor offer over a solid conductor in PS520LS-25G-F?
The 19-strand Silver Plated Copper construction (19/0.29) distributes mechanical bending stresses across individual fine wires rather than concentrating stress on a single thick core. This significantly improves flexure fatigue life, prevents conductor work-hardening/breakage during repeated movement (e.g., gimbal assemblies, robotics, test interconnects), and reduces phase change during cable flexing.
How does PS520LS-25G-F maintain electrical stability up to 25 GHz despite having a stranded inner conductor?
At higher microwave frequencies (up to 25 GHz), skin effect causes the RF signal to travel along the outer surface of the conductor. By utilizing precision-concentric 19/0.29 silver-plated strands wrapped with ultra-uniform Low-Density PTFE (LD-PTFE), PS520LS-25G-F maintains a consistent 50 Ω characteristic impedance, excellent return loss, and minimal phase variation under flexure.
Which connector series are recommended for assembling onto PS520LS-25G-F?
PS520LS-25G-F (5.20mm outer diameter, 1.45mm stranded conductor) is compatible with high-frequency precision RF connectors such as SMA (up to 26.5 GHz), 2.92mm (K-type, up to 25 GHz), and 3.5mm connectors featuring stranded-compatible center pin capture (solder or clamp) and dual-braid crimp/clamp outer attachment.
