Improved alternative Method for fast and simple Transfer Impedance Measurements

Christian Tuerk, Susanne Maria Bauer, David Johannes Pommerenke

Research output: Contribution to journalArticlepeer-review


The transfer impedance of coaxial cables has been
under investigation for many decades. Since this parameter is
highly relevant in electromagnetic compatibility (EMC) many
theoretical models and various test procedures exist. The method
proposed in this paper employs a direct line injection using the
magnitudes and phases of two s-parameter, namely reflection
coefficient and forward gain, in order to determine the transfer
impedance reliably and swiftly. Extracting the transfer
impedance requires little post processing and the test setup
consists only of a simple adapter and the cable under test. This
method also allows to account for different lengths of cables as
will be outlined and does not require any alteration of the cable
under test. It may be used for ready-made cables with molded,
crimped or soldered connectors as well as for open-ended
samples of cables. The method presented here extends the model
used and the usable frequency range considerably compared to
previous work on this alternative approach.
Original languageEnglish
Number of pages4
JournalIEEE Letters on Electromagnetic Compatibility Practice and Applications
Publication statusE-pub ahead of print - 2020


  • transfer impedance
  • measurement method
  • shielded cable
  • shielding effectiveness
  • vector network analyzer


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