Extraction of Effective Bulk and Surface Parameters of Three Dimensional Artificial Media Using Bloch Modes

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Sheikh Ansari, Abbas | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51595 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Rejaei, Behzad
Abstract:
Artificial periodic mediums such as metamaterials or photonic crystals have been intensively studied in recent years due to their unique characteristics and the ability to control their effective electromagnetic parameters. Developing accurate methods for the extraction of these parameters is highly desirable, given the potential application of artificial materials in optical and microwave devices. In this thesis a new method is presented for computing the effective bulk and surface parameters of three-dimensional artificial periodic materials. The effective, bulk permeability and permittivity tensors are shown to be directly related to the eigenvectors of the generalized transfer matrix of a unit later that correspond to propagating Bloch modes of structure. The effect of the non-propagating Bloch modes is manifested as surface impedance (or admittance) matrices. Scattering parameters for a slab of artificial material have been computed using full wave simulations to verify the result obtained from proposed model
Keywords:
Artificial Medias ; Periodic Artificial Media ; Homogenization ; Effective Electromagnetic Parameters ; Generalized Transfer Matrix ; Effective Parameters