平面波斜入射多层材料的屏蔽效能与反射衰减

为解决多层屏蔽材料和吸波材料在分析设计中屏蔽效能和反射衰减的计算问题，从电磁场理论出发，提出了平面波斜入射时材料分界面的输入阻抗，导出了TE波和TM波以任意角度入射多层材料的屏蔽效能和反射衰减计算公式。通过对计算公式的验证与分析，实验验证了计算公式的有效性。研究了电磁波入射角度与极化方式对多层材料的电磁屏蔽效能和反射性能的影响，其结论可用于指导电磁材料的设计与应用。

Shielding effectiveness and reflection attenuation of multi-ply material due to oblique incident plane wave

To calculate the shielding effectiveness and absorbing attenuation of multi-ply shields and microwave absorbing material in the material design, the input impedance at the interface due to oblique incident plane wave is proposed, with which the shielding effectiveness and absorbing attenuation of multi-ply material due to arbitrary incident TE wave and TM wave are deduced. The expressions for the shielding effectiveness and absorbing attenuation are validated by the experiments. Furthermore, the influence of incident angle and polarization state on the shielding effectiveness and microwave absorbing performance are studied with the application and analysis of the deduced formulae, which will be useful for the design and application of electromagnetic materials.