A Generalized Microwave Absorption Criterion of Two‐Port Networks for Electromagnetic Interference Shielding

Abstract

Herein, the Z₁₁ argument tangent is proposed as a novel criterion for assessing energy loss (absorption) of the reciprocal two‐port networks composed of the shielding material. With a simple mathematical deduction, it can be found that the relationship between the network absorption and the Z₁₁ argument tangent is inverted. The absorption decreases with increasing the Z₁₁ argument tangent, and the Z₁₁ argument is approximately equal to the power factor angle. Additionally, a series of samples are presented to verify their absorptions and the Z₁₁ argument tangents. The numerical simulations on other works are also presented to calculate the Z₁₁ argument tangent and validate the relationship between the Z₁₁ argument tangent and electromagnetic absorption from another side. The experiment and simulation results agree well with that of the mathematical deduction. The findings can be applied in most passive shielding materials and provide a promising approach to guiding and developing absorption‐dominated electromagnetic shielding materials for next‐generation communication applications.