We present and analyze an interior penalty method for the numerical discretization of the indefinitetime-harmonic Maxwell equations in mixed form.The method is based on the mixed discretization of the curl-curl operator developedin [Houston et al.,J. Sci. Comp.22 (2005) 325–356]and can be understood as a non-stabilized variantof the approach proposed in [Perugia et al.,Comput. Methods Appl. Mech. Engrg.191 (2002) 4675–4697].We show the well-posedness of this approach andderive optimal a priori error estimates in the energy-normas well as the L 2-norm. The theoretical results areconfirmed in a series of numerical experiments.
