Characterization of Radiating Sources in the Near Field Using EMTR Technique: A Parametric Study

The aim of this study is the investigation of the effects of parameters involved in the characterization of radiating sources in the near field (NF). The main issue is to deal with structures of power electronic systems that are generally excited by non-sinusoidal signals. The identification is based on the electromagnetic time reversal (EMTR) technique. Indeed, the electromagnetic field was synthesized analytically using expressions of equivalent dipoles radiation in time domain (TD). The effects of several parameters on sources characterization, including the height of measurement, time reversal mirror (MRT), potential sources network, and the measuring probe were evaluated. Several simulation tests have been applied to this set of parameters to determine their simultaneous effect on the identification of radiated emissions of a power electronic structure. Based on this parametric study, a compromise between the accuracy of the obtained equivalent model and an acceptable computing time is determined and demonstrated to provide an efficient reconstruction.