Analytical and numerical eigenanalysis of electromagnetic structures: A review

The current work is the theoretical framework of the Research Project “Thales” entitled: “Development of electromagnetic simulation and design tools for digitally controlled and multifunctioning RF-microwave stages and subunits which retain characteristics-specification supporting Software Defined (SDR) and cognitive Radios (CR)”. Thus, a review of the analytical and numerical eigenenalysis tools developed and used under the framework of this project is presented herein. An abstract description of these methods in addition with some indicative results is thus presented.