LOCAL ADAPTIVE MULTIGRID FOR FINITE INTEGRALSTECHNIQUE

摘要

This paper contains an analysis of the local adaptive approach for Finite IntegralsrnTechnique (FIT), suitable and efficient in solving electromagnetic field problems encountered inrncompact modelling of on-chip passive structures at high frequencies. More scientific applicationsrnhave the property of high speed varying solution in small surfaces/volumes of the modeled domain. Tornsolve efficiently this kind of problems, the adaptive strategies are used to concentrate grid nodes inrnregions where probability of errors appearance is. In this way the quality of approximated solutionrncan be improved while the total number of nodes is maintained at a low level. The Adaptive MeshrnRefinement (AMR) technique we propose uses Octree data-structure. Theoretical aspects andrnobtained numerical results are presented.