## Abstract

Hybrid finite element (FE) - boundary integral (BI) techniques provide for rigorous modelling of three-dimensional (3D) radiation and scattering problems involving arbitrary inhomogeneous (possibly lossy) dielectric as well as metallic bodies. However, the linear equation systems resulting from the discretized problems are typically not very well conditioned and the unavoidable iterative solution of large problems is not easy. A robust formulation is obtained by employing a standard FE technique coupled with a combined field integral equation (CFIE) and proper scaling of the different types of unknowns. A multilevel iterative preconditioning strategy is proposed for an efficient and robust solution of the equation systems. Also, the multilevel fast multipole method (MLFMM) is used to speed-up the evaluation of the BI matrix-vector product contributions in the iterative equation solver. A variety of application problems is solved to demonstrate the accuracy and efficiency of the proposed approach.

Original language | English |
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Pages (from-to) | 157-160 |

Number of pages | 4 |

Journal | ITG-Fachbericht |

Issue number | 178 |

State | Published - 2003 |

Externally published | Yes |

Event | INICA 2003: International ITG-Conference on Antennas - Berlin, Germany Duration: 17 Sep 2003 → 19 Sep 2003 |