As a professional manufacturer deeply engaged in the field of RF coaxial cables, Focusimple Electronics consistently places material and process innovation at the core of its development, dedicated to delivering high-performance products precisely matched to customer application scenarios.

Technical Background

In the research of polytetrafluoroethylene (PTFE) materials, Focusimple Electronics has released a series of technical studies:

https://www.focusimple.com/news/technology-center-209.html

https://www.focusimple.com/news/technology-center-210.html

This year, Focusimple achieved key technological progress in the PTFE extrusion-foaming dielectric process and conducted comprehensive testing on the FSB-220T (086-type extruded foamed PTFE dielectric) product.

Testing results show that the FSB-220T (086-type extruded foamed PTFE dielectric) demonstrates the following core characteristics:

Velocity Consistency

The extruded foamed PTFE dielectric is formed through an integrated process of PTFE powder extrusion, sintering, and shaping, resulting in superior dielectric uniformity.
From 81 samples taken from a 2 km mass-production batch, 80% exhibited velocity of propagation within 81.65% ±0.3%, showing extremely low variation. This significantly improves physical length deviation issues after phase matching in bundled cable assemblies.

FSB-220T Velocity Test Results

Thermal Shock Stability

The extruded foamed PTFE dielectric is directly bonded to the center conductor, providing markedly stronger adhesion than conventional wrapped dielectrics that rely on frictional fixation. After multiple thermal shock cycles, the dielectric maintains dimensional stability, offering clear advantages in:

1. Short cable assemblies

2. Applications involving thermal shock or thermal cycling

In thermal shock testing (–65 °C to 105 °C cycles), the extruded version demonstrated significant advantages. Electrical performance remained stable after testing, and the dielectric exhibited virtually no shrinkage.

Measured Thermal Shock Results of Extruded Dielectric

Cross-section of Extruded Dielectric After Thermal Shock

Application Value

RF coaxial cables with extruded foamed PTFE dielectrics deliver outstanding velocity consistency and thermal shock stability, making them highly suitable for phase-matched bundled assemblies and applications with significant ambient temperature variations. This product has already been implemented in volume production across multiple project models.

Focusimple Electronics will continue to deepen its research into material and process technologies, leveraging objective data analysis and application-driven solutions to help customers make optimal choices for complex application requirements.