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In this paper, the time normalization for the time-domain augmented electric field integral equation (TD-AEFIE) is studied. Because of the introduced current continuity equation and the inherited convergence issue in the frequency domain, the marching on-in-time (MOT) system matrix is also ill-conditioned. After applying a time-domain preconditioner, the iterative system converges faster than the...
Electromagnetic scattering by three-dimensional complex perfect electrically conducting (PEC) objects buried under ground is investigated in this paper. The air-soil composite is approximated by a half-space model, where the half-space Green's function is adopted in the formulation of the electric field integral equation (EFIE). The simulation efficiency is improved from the following two aspects:...
A cubic polynomial inter/extrapolation method is investigated to improve the inter/extrapolation accuracy of the matrix over a frequency band in the method of moments (MoM). In the method, the error of the MoM matrix in the Frobenius norm can be expressed as a product of the error coefficient and the polynomial component. The error coefficient is insensitive to the positions of the frequency samples...
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