Abstract
In this paper, an integral equation-based non-conformal and non-overlapping domain decomposition method (DDM) is proposed for solving electromagnetic scattering from large-scale and multi-scale perfect electric conducting (PEC) objects. In this DDM, discontinuous vector basis functions are employed to expand the surface currents flowing across adjacent sub-domains, and a novel interior penalty term is introduced to weakly enforce the normal continuity of these currents. The proposed method provides an effective domain decomposition preconditioner with no need to introduce an additional contour sub-domain or a buffer region. Moreover, no stabilization term is required in this method, making it much easier to be applied for curvilinear discretizations to obtain higher modeling accuracy. Several numerical examples are given to demonstrate the accuracy and efficiency of the proposed scheme.
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