Adaptive finite-element multigrid method in 3D magnetostatic analysis

We present a procedure of magnetostatic analysis of microwave circuits comprising conductors of arbitrary shapes. It is assumed that the magnetic field excitation is given as a total current flowing in signal conductors. The boundary conditions in structures of arbitrary geometries without symmetry are introduced by means of partitioning surfaces. This formulation leads however to several implementational issues that are addressed in this paper. The use of adaptive finite element method and multigrid method provides required flexibility with respect to analyzed geometry, optimal discretization and good efficiency.