Abstract
The use of a physically-based preconditioner for the iterative solution of linear system arising from the method of moments is investigated. The preconditioner is built with a modal approach solving a problem physically close to the one we are interested in. Numerical tests about the spectral information are given. Convergence behavior of the iterative solution is studied and the efficiency of the approach illustrated for practical range of values of interest. Although the preconditioner has been designed for periodical surfaces, it was shown to be efficient in the case of truncated surfaces illuminated by plane wave.
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