20130521
A broad class of structures in electronics and highfrequency engineering exhibits linear timeinvariant system properties. It ranges from antennas and filters through wiring structures of integrated circuits to the cavities of linear accelerators and the elementary cells of metamaterials. Such structures constitute distributedparameter systems of high complexity, and their characterization usually requires numerical simulation methods at the level of electromagnetic fields.
This presentation gives an overview of typical modelling, solution, and postprocessing techniques, based on the method of finite elements in the frequency domain. By reference to a model problem representative for highfrequency engineering, a radiating structure fed by inhomogeneous waveguides, I will review the modal characterization of waveguides, its usage in threedimensional driven problems, the modelling of concentrated circuit elements and radiation effects, as well as farfields computation techniques. Moreover, I will discuss the numerical properties of selected formulations and solution methods for largescale systems of linear equations and algebraic eigenvalue problems. A few remarks on adaptive methods for error control as well as the treatment of parameterdependent problems conclude the presentation.
Technische Universität Darmstadt
Graduate School CE
Dolivostraße 15
D64293 Darmstadt

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