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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Comparison of equivalent circuit models for a multimode dielectric resonator absorber
 Vrba, J. ; European Microwave Association; Institute of Electrical and Electronics Engineers IEEE: European Microwave Conference in Central Europe, EuMCE 2019. Proceedings : 13th15th May 2019, Prague, Czech Republic Piscataway, NJ: IEEE, 2019 ISBN: 9781728112404 ISBN: 9782874870675 S.294297 
 European Microwave Conference in Central Europe (EuMCE) <1, 2019, Prague> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer FHR () 
Abstract
Two equivalent circuit models for a dielectric resonator absorber structure are developed and compared. The first model is based on the modal field distributions inside the resonator structure, while the other one is based on the modification of Foster's reactance theorem. Circuit parameters of these models are extracted using a genetic algorithm. The input impedance magnitude and reflection coefficient from these circuits are compared with the results from fullwave simulation within the frequency range of 3 GHz  18 GHz. It is shown that the equivalent circuit using modal field distribution has a higher mean deviation for both inputimpedance magnitude and reflection coefficient than that based on the Foster equivalent circuit. But, from a physical point of view, the modal field distribution offers a better explanation for the generation of modes within the resonator. Both models can complement each other.