从麦克斯韦方程出发,给出电磁波垂直入射到良导体和欠良导体时的电场表达式;应用菲涅尔公式给出电磁波垂直入射到良导体和欠良导体两类材料的趋肤效应的理论解释,推导出趋肤深度的表达式;数值计算结果与现有公式得出的数据符合程度较高。 Based on Maxwell’s equations, the electric field expression is given when the electromagnetic wave is perpendicularly incident on the good conductor and the poor conductor. The theoretical explanation of the skin effect of the electromagnetic wave perpendicularly incident on the good conductor and the poor conductor is given by the Fresnel formula , The expression of skin depth is deduced. The numerical results are in good agreement with the data obtained from the existing formulas.