Mutual Inductance Measurement in Wireless Power Transfer Systems Operating in the MHz Range

Andrea Celentano, Carmine Paolino, Fabio Pareschi, Luca Callegaro, Riccardo Rovatti, Gianluca Setti

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This tutorial focuses on the problem of the experimental measurement of the mutual inductance (or, equivalently, of the coupling factor) of two coupled coils designed for a Wireless Power Transfer (WPT) system. Although many instruments and techniques are available for this purpose, in the literature, no clear guidelines defining the most reliable technique exist, and the vast majority of papers propose ad-hoc measurement approaches without clearly explaining pros and cons of each specific choice. The contribution of this paper is to fill this gap by i) reviewing the available methodologies that can be used to measure the mutual inductance, ii) highlighting the issues that may arise, and iii) identifying the most suitable technique for a particular use case. More specifically, to increase the impact of our analysis, we focus on the case of a couple of WPT coils for biomedical applications designed to work at 6.78 MHz, which is a setting both very common and quite tricky for the direct measurement.

Original languageEnglish (US)
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Issue number3
StateAccepted/In press - 2023

Bibliographical note

Publisher Copyright:


  • Biomedical measurement
  • Coils
  • Coupling Factor
  • Couplings
  • Frequency measurement
  • Inductance
  • Inductance measurement
  • Instruments
  • Mutual Inductance Measurement
  • Wireless Power Transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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