Electromagnetic shielding properties of multilayered composites containing multiple inclusions with various spatial distributions

Abstract A scheme is proposed for predicting the electromagnetic shielding properties of multilayered composites containing multiple inclusions of diverse shapes, volume concentrations, and spatial distributions based on homogeneous comparison materials and the plane-wave shielding theory. This scheme leads to completely explicit formulas for the shielding effectiveness and reflected loss of multilayered composites in terms of microstructural parameters that characterize the shape, distribution, and orientation of the inclusions. The predicted shielding effectiveness and reflected loss of single layer composite containing randomly oriented and distributed flaky silver-coated carbonyl-iron particles and two-layer composite containing randomly oriented and distributed nickel-plated short carbon fibers agree well with the experimental data.