Dielectric Parameters of a Coaxial Cable

In this document, we show how to measure the dielectric properties of the insulator in a coaxially constructed cable using SPECTANO 100.

The dielectric insulator of a cable is an important parameter influencing the capacitance of the cable as well as the dielectric loss in the cable. A high permittivity leads to a high cable - capacitance and a high loss tangent leads to high dielectric losses. Especially in medium-voltage and high-voltage cables, the dielectric loss can be a critical parameter. In high-frequency cables, the dielectric loss will lead to signal attenuation.

Using SPECTANO 100 with the Spectano Analyzer Suite, the dielectric properties cannot only be measured at a single frequency but over a wide frequency range resulting in a dielectric frequency response.

A coaxially constructed cable or a shielded power cable offers a defined geometry that makes the dielectric analysis of the insulating layer a rather simple task.

Check out the following application note on how to measure the dielectric properties of a coaxially constructed cable using SPECTANO 100.