Mixed-Field Hybrid for Two-Dimens and Scattering

Abstruct-h this letter, a new mixed-field, hybrid finite-element method (FEM) (E-fie1d)lSEM (H-field) formulation is presented for modeling the two-dimensional (2-D) radiation and scattering from scatterers comprised with inhomogeneous materials including resistive cards and perfectly electrically conducting (PEC) strips for the TE polarization. Using the usual H-field formulation leads to the requirement for the use of special gap element. And the E-field formulation will result in a much more cumbersome BEM integral. The new mixed-field formulation retains the simplicity of scalar formulation and is useful for a problem which cannot be treated elegantly with existing approach. The new formulation has been implemented into a 2-D FEM/BEM computer code. Numerical results obtained compare well to previously published results.