【摘要】 本文从基本的电磁波传播理论出发，考虑了电磁波在屏蔽层中的反射、衰减及多次反射，提出了多层复合材料屏蔽效能（ＳｈｉｅｌｄｉｎｇＥｆｅｃｔｉｖｅｎｅｓ，简称ＳＥ）的理论模型和计算公式。公式的应用简便、快捷、适用范围广，可用于不同入射方向的电磁波入射多层复合材料的屏蔽效能计算及预测。最后对公式进行了验证，计算结果与实验数据基本吻合。更多还原

【Abstract】 This paper given a method which can calculate the shielding effectiveness (SE) of multilayered composite material.Based on the basic propagation theory it deals with reflection,attenuation and re-reflection in the layers.The method can be applied to calculate the SE of multilayered composite material under arbitrarily incident wave.In order to illustrate the versatility of the method,SE of three-layer composites (Cu/42 permalloy/Cu) was calculated by this method at H field,results was in agreement with the data from experiment.更多还原