MIXED-DIMENSIONAL FINITE-ELEMENT MODELS OF ELECTROMAGNETIC COUPLING AND SHIELDING

Finite elements of dimensions 0, 1, 2, and 3 are used to model electro magnetic coupling and shielding. Elements of dimension 0 represent cir cuit elements, while those of dimension 1 can represent wires. In addi tion to ordinary two- and three-dimensional (2- and 3-D) finite elemen ts, asymptotic (ABC) finite elements are discussed for modeling fields extending to infinity. The models with finite elements of mixed dimen sion are first used to compute capacitance and inductance matrices and their related coupled voltages and currents. Finally, a mixed-dimensi onal finite-element model is made of an electromagnetic shielding encl osure, for which the computed dynamic leakage fields are shown to agre e with measurement.