Decoupling of Ground Plane Effect on Low Frequency Magnetic and Electric Field Measurements & Modeling

Abstract

In the present work, the theory of image sources is employed to account for the contribution of the ground plane in low frequency electric and magnetic field measurements. The developed method targets at estimating a dipole model source from the near field measurements of an Equipment Under Test (EUT), taking into consideration its image source(s) due to the presence of a ground plane. For the evaluation of the proposed approach, the electric and magnetic field emissions generated by a-priori known sources are captured and the respective models are predicted using the spectral field values. The present study and the verification measurements have been carried out in the frame of ESA's study on Pre-Verification of THOR Electro-Magnetic Cleanliness Approach.