Broadband Modeling of Mutual Coupling between Surface-Mounted Devices

Electromagnetic interference (EMI) is a fundamental challenge in electronic systems. The use of filter structures, in-cluding surface-mounted (SMT) passive components, is essential to ensure the reliable operation of such systems. However, these devices are susceptible to parasitic coupling effects when placed in close proximity, leading to changes in their electromagnetic (EM) behaviour and potential EMI problems at a particular frequency range. This paper investigates the effects of different package sizes and placements on the EM coupling between devices using 3D fullwave finite element (FE) simulations and experimental measurements. Finally, an equivalent circuit model is derived from the FE simulation results that can be used in computationally more expensive EM-Co system simulations to account for these coupling mechanisms.