The transfer impedance of cables with a nearby return conductor and a noncentral inner conductor

M.J.A.M. Helvoort, van, A.P.J. Deursen, van, P.C.T. Laan, van der

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

The transfer impedance Z/sub t/ of a cable is often assumed to be a characteristic of the shield only. We investigate the limits of this assumption by calculations and measurements. The first test cable was formed by a solid copper tube (ldquoshieldrdquo) and a wire inside; several positions, also non-central, were chosen for the wire. The common mode current (between 10 Hz and 100 kHz) through the tube had as return path a single wire, which was placed at several positions, near and at some distance from the shield. A second cable with a braided shield was tested as well. The results show that both the differential mode and the common mode circuit have to be carefully defined for a particular Z/sub t/. Varying either circuit may alter Z/sub t/ drastically. Consequently, the Z/sub t/ of a particular cable measured in a triaxial setup, is a characteristic of that setup and cannot always be used in another setup as in for instance cable bundles
Original languageEnglish
Pages (from-to)301-306
Number of pages6
JournalIEEE Transactions on Electromagnetic Compatibility
Volume37
Issue number2
DOIs
Publication statusPublished - 1995

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