Comparative study to reduce and control radiated EMI in planar power devices

In this work, we propose a comparative study to reduce, and control the radiated electromagnetic interference (EMI) as crosstalk in planar power devices, such as a PCB board of boost converter DC-DC. The PCB board contains two coupled microstrip: power, and control lines that induce a strong crosstalk. A comparative study between several methods against crosstalk is proposed. The serpentine guard trace and the guard trace with via holes are explored in this work. But the serpentine guard trace can be transformed, into an additional source of electromagnetic interference by a crosstalk peak. To control this crosstalk peak, we added a microstrip steps in the width, between the coupled lines. This method allows reducing more than 84% of the NEXT, and more than 68% of the FEXT.