Conductor insulation largely influences the cable’s bandwidth by reducing signal energy loss. The proprietary CAFPE® (Combined Air-Foamed Polyethylene) insulation, developed by Tchernov Cable, is based on the hot extrusion process. A 3-layer CAFPE® comprises two layers of solid PE and an air-foamed PE in between. It surpasses other insulators in terms of dielectric permittivity and is used in coaxial designs.
A 2-layer CAFPE®, used in symmetrical cables, consists of an extended inner air-foamed PE layer and a thin solid PE as an outer layer. A conductor’s direct contact with a lower relative permittivity dielectric significantly decreases distributed capacitance, signal attenuation and dispersion. High precision extrusion tooling maintains consistent structural uniformity and homogeneity of each insulation layer.
