A fast algorithm for the analysis of scattering by elongated cavities

Moti Zelig, Ehud Heyman and Amir Boag

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 13, 1675-1696

Abstract: Electromagnetic scattering from elongated, arbitrarily shaped, open-ended cavities (OEC) has been studied extensively over the years. In this paper, we introduce the fast encapsulating domain decomposition (EDD) scheme for the analysis of radar cross section (RCS) of such OEC. The EDD advantages stem from a domain decomposition along the elongated dimension, followed by a spectral representation of the fields in each segment, whereby the field is naturally separated into in- and out-going waves. This diagonalizes the translation between the cross sections, thus reducing the per segment computational complexity from O((NA)3) $ O((N^{\text{A}} )^{3} ) $ to O(NW(NA)2) $ O(N^{\text{W}} (N^{\text{A}} )^{2} ) $ , where NA $ N^{\text{A}} $ and NW $ N^{\text{W}} $ are the number of aperture and wall unknowns per segment, satisfying NW

Date: 2018
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DOI: 10.1080/09205071.2018.1465481

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