A scheme for eliminating internal resonances: the parasitic body technique

A scheme for solving ill-conditioned scattering problems associated with surface integral equations involving bodies of general composition is presented. It consists of analytically continuing a (parasitic) lossy body into the interior of a resonant geometry, where it interacts only with the resonance fields, attenuating them. The technique can be used to endow any surface code with internal resonant suppression capabilities provided it can handle, in addition to the scatterer, another lossy body or external R-sheets.<
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