High Frequency Analysis of a Switching Mode Power Supply

In this paper, the electromagnetic fields radiated by a buck converter are calculated with a method based upon the method of moments (MoM). From the field line plots of the Poynting vector field, it is seen that there exists a HF channel between switch and diode. In the second part of the paper, the conditions are derived to obtain a matching between the transmitter (switch) and the receiver (diode) at the different ends of the HF channel. The main asset of the paper lies in the many figures that illustrate the fundamental working principle of the buck converter