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A Spectral Integral Method and Hybrid SIM/FEM for Layered Media

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3 Author(s)
Simsek, E. ; Dept. of Electr. & Comput. Eng., Duke Univ., Durham, NC ; Jianguo Liu ; Qing Huo Liu

This paper first presents a spectral integral method (SIM) for electromagnetic scattering from homogeneous dielectric and perfectly electric conducting objects straddling several layers of a multilayered medium. It then uses this SIM as an exact radiation boundary condition to truncate the computational domain in the finite-element method (FEM) to form a hybrid SIM/FEM, which is applicable to arbitrary inhomogeneous objects. Due to the high accuracy of the SIM, the sampling density on the radiation boundary requires less than five points per wavelength to achieve 1% accuracy. The efficiency and accuracy of the developed methods have been demonstrated with several numerical experiments for the TMz case. The TEz case can be obtained by duality

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 11 )