Impedance Analysis of a Two-Layer Air-Core Coil for AC Magnetometry Applications
The aim of the study was to analyze the impedance characteristics of the transmitting coil used in a system for AC magnetometry and the measurement of the Specific Absorption Rate (SAR) of magnetic nanoparticles. A theoretical relationship for the current distribution in a multilayer air-core coil was derived. The formulas for the coil's stray capacitance were modified to account for additional spacing between layers, introduced to reduce the interlayer capacitance. The developed theory was applied to a two-layer air-core coil with an additional gap between the layers. The frequency dependence of the coil impedance was measured. The measurements confirmed an extension of the useful operating frequency range of the constructed coil.
Authors
- Damian Wanta (ORCID: https://orcid.org/0000-0002-1596-6524)
- Grzegorz Domański (ORCID: https://orcid.org/0000-0002-0204-2322)
- Michał Wieteska (ORCID: https://orcid.org/0000-0002-0722-7705)
- Piotr Bogorodzki (ORCID: https://orcid.org/0000-0001-6596-5274)
- Przemysław Wróblewski (ORCID: https://orcid.org/0000-0002-6713-9088)
- Waldemar T. Smolik (ORCID: https://orcid.org/0000-0002-1524-5049)
- Mateusz Midura (ORCID: https://orcid.org/0000-0002-2449-0652)
- Kamil Lipiński (ORCID: https://orcid.org/0000-0002-7154-2988)
Institutions
- Warsaw University of Technology (PL)
Publication Details
- Journal
- Sensors
- Published
- 2025-08-28
- DOI
- https://doi.org/10.3390/s25175339
- Primary Topic
- Characterization and Applications of Magnetic Nanoparticles
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Politechnika Warszawska