FEMAX Finite-Element Package for Computing Three-Dimensional Time-Domain Electromagnetic Fields in Inhomogeneous Media

摘要

An efficient and accurate finite-element package is described for computing transient as well as time-harmonic three-dimensional electromagnetic fields in inhomogeneous media. For the expansion of the field in an inhomogeneous configuration, edge elements are used along the interfaces between media with different medium properties to allow for the continuity conditions of the field across these interfaces, nodal elements are used in the remaining homogeneous subdomains. In the domain of computation the package decides locally what type of element has to be used for obtaining the user-specified accuracy of modeling the field. In this way optimum results are obtained both in regard to computational efficiency and in regard to desired accuracy. The electromagnetic compatibility relations are implemented for avoiding spurious solutions.