时变电磁场 描述电磁介质与场矢量之间的本构(constitutive)关系 D=8E+P D=8E B=4,(H+M0 B=月 J-oE J=oE VxH-J+8 aE 7.H=0 8t VxE=-u af 8t e lexu@mail.xidian.edu.cnlexu@mail.xidian.edu.cn 15 时变电磁场  描述电磁介质与场矢量之间的本构(constitutive)关系 0 0 ( ) D EP B HM J E ε µ σ = +   = +   =        D E B H J E ε µ σ =   =   =        E H J t ε ∂ ∇× = + ∂    H E t µ ∂ ∇× = − ∂   ∇⋅ = H 0  E ρ ε ∇⋅ =  XIDIAN UNIVERSITY LEXU@MAIL.XIDIAN.EDU.CN