Coils built on printed circuit boards (PCBs) have been widely used for transformers and inductors because it has the advantages of downsizing and consistency for mounting components on PCBs. However, copper loss caused by the skin and proximity effect takes a large proportion of the total loss of the inductors at high-frequency regions. Thus, reducing copper loss is one of the significant issues for the inductors. This paper proposes a method to suppress copper loss (AC resistance) due to the skin and proximity effect by splitting patterns of a coil and swapping them at the corner of the coil. The simulation results demonstrate that a 12-corner coil shape with a splitting pattern into three sections suppresses the resistance by 16.7% compared to a spiral coil and improves the quality factor by 10.9%.
