Comparative study between EMTR technique and a GA-based method for modeling EM radiation source in the Near Field

This paper presents a comparative study between two different methods used in modeling electromagnetic transient disturbances of power electronic systems. The first method is the electromagnetic time reversal (EMTR) technique based on time domain analysis. The second one is the frequency inverse method based on genetic algorithms (GA). The two methods are using the near field scanning technique. Moreover, both algorithms are established on the resolution of an inverse problem and they employ magnitude-only data. The obtained equivalent radiation models are compared with initial pattern for both simulation and experimental test cases. The frequency-time evaluation is discussed. The comparison between the two proposed methods shows that the EMTD method is more suitable for studying power electronics radiation and that it can provide an accurate equivalent model in a reduced time.