Individual conductor insulation has an enormous impact on the overall cable performance level. Tchernov Cable has introduced the multilayer sandwich type Combined Air-Foamed Polyethylene insulation - CAFPE®. The 3-layer CAFPE® comprises two layers of solid PE with different structural properties and an air-foamed PE in between. It provides superior dielectric qualities and is used mainly in coaxial designs with a 75 Ohm rated wave impedance for reducing signal energy loss.
With the new advanced 2-layer CAFPE® previously unattainable consistent dielectric properties have been achieved. Developed exclusively for symmetrical conductor topology it consists of inner air-foamed PE and solid PE as an outer layer. The latest generation of high precision tooling, used to overlay the CAFPE®, provides improved uniformity and homogeneity of each layer. Having substituted a solid PE layer with the foamed one we eliminated a direct conductor contact with higher relative permittivity dielectric. Moreover, the extended inner air-foamed PE layer results in a further decrease of the overall cable capacitance and signal energy losses.