Prediction of radiated EMI from high frequency power converters

This paper concerns prediction of radiated EMI of high frequency switched-mode power converters. Harmonic analysis and simplified antenna models are used to calculate radiated EMI emission levels. Characteristics of radiated EMI from power converters are presented. The EMI bound of a power converter can be estimated. Quantitative comparison of EMI levels of converters with identical geometrical layout can be made. The validity of this method is analysed. The proposed method enables radiated EMI from high frequency power converters to be predicted using a generic circuit simulator, providing a useful method for preliminary EMC design