We can further represent the EFIE in the dyadic form as E = − − j ω ω μ μ ∫ ∫ V d r ′ ′ G ( r , r ′ ′ ) ⋅ ⋅ J ( r ′ ′ ) where G ( r , r ′ ′ ) here is the dyadic homogeneous Green's Function given by G ( r , r ′ ′ ) = 1 4 π π [ I + ∇ ∇ ∇ ∇ k 2 ] G ( r , r ′ ′ )