Stabilizing the E-Field Integral Equation at the internal resonances through the computation of its numerical null space

Article type: Research Article

Authors: Angiulli, G.^{a; *} | Tringali, S.^a

Affiliations: [a] DIMET, University Mediterranea, via Graziella, Reggio Calabria, Italy

Correspondence: [*] Corresponding author: Giovanni Angiulli, DIMET, University Mediterranea, via Graziella – Loc. Feo di Vito, 89100 Reggio Calabria, Italy. Tel.: +39 0965875275; Fax: +39 0965875247; E-mail: giovanni.angiulli@unirc.it

Abstract: In this paper a technique to protect the Method of Moments solution of the E-Field Integral Equation (EFIE) for the scattering by conducting body from effects of its internal resonances, is presented. This method is based on the evaluation of the numerical null space K of the discretized EFIE operator. In order to verify its effectiveness, results for the plane wave scattering from a perfect conducting cube are presented. It is shown that the proposed method is able to give the correct value of the RCS even in presence of the interior resonances.

Keywords: Electromagnetic scattering, boundary integral equations, interior resonances

DOI: 10.3233/JAE-2010-1065

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 32, no. 2, pp. 63-72, 2010