TY - CHAP A1 - Seliger, Norbert A1 - Faltlhauser, Georg T1 - Progressive Expansion Sampling of Quasi-Static Magnetic Fields for EMI Noise Detection and Equivalent Source Modeling T2 - Proceedings EMC Europe 2023 N2 - We introduce a quick and accurate quasi-static magnetic field scanning technique by employing a progressive sampling method in an unconfined input space. The proposed machine learning algorithm is tested against uniform sampling on a printed circuit board test structure. We prove allocation of multiple, separated regions with predefined tangential field strengths at MHz frequencies. The feasibility of equivalent magnetic dipole source modeling based on a small number of samples is demonstrated. Compared to uniform testing, progressive expansion sampling detects contours of given field limits in less than 3% of the reference measurement time. KW - magnetic near field KW - Gaussian process classifier KW - EMI Y1 - 2023 PB - IEEE CY - Krakov ER -