Characterization of the dispersion of macroscopic electromagnetic properties of composite materials is a challenging task, but it offers an efficient and effective path to interpret features or phenomena, and to design artificial structures with desired properties. In this thesis, the quasi-dynamic homogenization is performed to characterize the dispersive electric properties of a class of dielectric composites. Although their geometry configurations are very simple, many fundamental yet significant features as well as problems appear during the quasi-dynamic homogenization process, and are thus studied in detail. The quasi-dynamic region is defined to include the quasi-static one and the frequency range close to the quasi-static limit. This thesis focuses on various homogenization models and techniques. In addition, the homogenization results by the proposed techniques are applied to explore several significant homogenization-related problems, such as quantification of the quasi-static limit, evaluation of a homogenization model, as well as the temporal pulse dynamics in dielectric (composite) materials.
|Translated title of the contribution||Dispersion of dielectric composites : quasi-dynamic characterizations and applications|
|Publication status||Published - 2011|
|MoE publication type||G5 Doctoral dissertation (article)|
- S-parameter retrieval
- angular dispersion
- Lord Rayleigh formula
- quasi-static and quasi-dynamic