Parallel FETI-EM Domain Decomposition Methods optimized for antenna arrays and metamaterials periodic structures

Domain Decomposition Methods have demonstrated efficiency and accuracy during the resolution of Maxwell equations in the frequency domain for both RCS applications and antenna structures interactions. In the domain of finite element methods, and for the resolution of acoustic Helmoltz equations, efficient sub-domain connecting techniques have been applied and called Dual-Primal Finite Element Tearing and Interconnecting. These techniques are known under the acronym FETI-DP and have been adapted to electromagnetic (FETI-DPEM) for the calculation of antenna arrays and metamaterial periodic structures. In this paper we describe the implementation of an algebraic parallel FETI solver developed at ONERA for both acoustic and electromagnetic applications. It has been called as a library in the FEM module of the FACTOPO tool developed for both antenna and RCS applications.