Definition, relevance and measurement of the parallel and axial transfer impedances

The paper is focused on the definition, evaluation and measurement of two of the five possible types of coupling on multiconductor cables: the parallel transfer impedance and the axial transfer impedance coupling. The definitions of these two parameters are presented and discussed. We then give two complete examples of field-to-cable coupling these types of coupling included. An experiment reproducing the set-up considered in our calculations shows the relevance of parallel and axial transfer impedances. Two new devices for the measurements of these quantities are then presented, and measurement results are given for several single-shield multiconductor cables