Validation of MOM/FEM in modelling studies of loaded enclosures with apertures

In this paper to obtain of electromagnetic field distribution inside loaded enclosure with aperture, we present hybrid formulation which combines method of moments (MoM) and vector finite element method (FEM). While FEM is used for solving electromagnetic fields inside of the enclosure, MoM is used for solving the surface integrals related with the aperture field components using equivalent surface currents. To obtain efficiency of the proposed method, first applied to empty enclosure and the results are validated by comparing with literature. Then the method applied to loaded enclosure Shielding effectiveness, stored electrical energy and dissipated power in load are examined.

INTRODUCTION

In design process of EMC systems, it is important to know electromagnetic fields inside enclosure coupling through apertures. The shielding enclosure contains apertures located on its walls and shielding efficiency is affected significantly by those apertures. The aim of shielding enclosure design is to minimize the effects of those apertures on shielding efficiency. To obtain shielding efficiency it is required that the EM fields inside enclosure are predicted.