Comparison of Theoretical and Experimental Decompositions for Plane Wave Shielding Effectiveness of Materials

This study investigated the relationship between reflection, absorption, and multiple reflection losses in Schelkunoff's theoretical decomposition method for the plane-wave shielding effectiveness (SE) of materials and reflection and absorption losses in an experimental decomposition method based on the power balance principle.It was mathematically confirmed that the reflection and absorption losses in the theoretical decomposition method differed from those in the experimental decomposition method, and that their mutual relationships were strictly derived.The theoretical SE was calculated using the physical properties of the conductive shielding and dielectric absorption materials, and the contributions of reflection and absorption were compared.In addition, through a 3D numerical analysis, the contribution of the shielding effect of reflection and absorption was calculated using the experimental decomposition method, and its accuracy was confirmed by comparing it with the results of analytically derived equations.