Patent ID: 8868382

Claim:
A computer implemented method for optimizing an electromagnetic near-field of a field excitation source of an electrical system within a three-dimensional (3D) domain under consideration comprising a 3D computer model of the system split into N partitions, the partitions being described by a tetrahedral or mixed grid containing at least one tetrahedral cell, comprising: defining, using a computer, electrical and magnetic properties of the material distribution of the system in each partition within the domain under consideration; defining, using the computer, at least one field excitation source within the system; determining, using the computer, the electromagnetic near-field components within all partitions by solving Maxwell's equations of the near-field, taking into account the defined material distribution and the defined field excitation source, updating parameters of the system, based on the determination of the electromagnetic near-field components, with respect to an antenna radiation behaviour, a beam direction optimization, a suppression of cross-talk, an optimization of a transmission or reflexion of electromagnetic waves or a minimization of a stray field of said electrical system, whereby individual component parameters including at least one of material properties, mechanical dimensions and/or excitation frequencies of said electrical system are varied within the framework of the optimization process, where each near-field component of each partition is represented by a linear position of M predetermined ansatz functions P i orthogonal to one another with regard to a scalar product and weighted with field coefficients v i , and the spatial and/or time derivative of the near-field component resulting from an application of inverse 3D mass, 3D curl and 3D trace operators required for solution of the Maxwell's equations is determined as a linear position of these ansatz functions P i weighted with derivative coefficients w i , and where when ascertaining the electrical near-field each coefficient w i is determined from a quantity of field coefficients v i and previously determined derivative coefficients w i , so that the detenninatiol1 effort of the spatial and/or time derivative rises in substantially linear manner to the number of partitions in the domain under consideration and to the number M of ansatz functions P i used in the linear position.