Metamaterials: 3-D Homogenization and Dynamic Beam Steering

Metamaterials: 3-D Homogenization and Dynamic Beam Steering

Bibliographic Details
Main Author: Hossain, A N M Shahriyar
Language:English
Published: University of Akron / OhioLINK 2019
Subjects:
Electrical Engineering
Metamaterials
non-asymptotic homogenization
effective medium theory
transfer matrix
Bloch wave
plasmonic medium
dynamic beam steering
tunable material parameter
global control
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-akron15744305854358142021-08-03T07:13:25Z Metamaterials: 3-D Homogenization and Dynamic Beam Steering Hossain, A N M Shahriyar Electrical Engineering Metamaterials non-asymptotic homogenization effective medium theory transfer matrix Bloch wave plasmonic medium dynamic beam steering tunable material parameter global control The first objective of this thesis is to explore an accurate two-scale homogenizationtechnique of periodic electromagnetic structures or metamaterials having any numberof dimensions. The fine-scale fields are approximated with a suitable set of basisfunctions in a unit cell. The coarse-grained field amplitudes are calculated as theboundary averages of the fine-scale fields. The effective material tensor is obtained inthe least-squares sense. The proposed method accurately predicts the scatteringparameters of a periodic layered medium, and of a 3-D plasmonic medium withany reasonable size and composition of the unit cell. A novel Bloch wave extractionprocedure has been implemented for the 3-D case. A trade-off between the accuracyand the range of applicability of the effective material tensor has been discussed.In addition, metamaterials with resonating elements have been applied todynamic beam steering. The resonators act as micro- or nano-antennas fed by atunable metamaterial guide or metasurface. The novelty lies in the absence of anyindividual tuning circuitry for each resonator. Rather, a global control is effectedby tuning the permittivity of the host material, or alternatively, by a multiguidesconcept. Optimized radiation profiles, and beam-scanning controlled in a dynamicfashion have been demonstrated. 2019 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814 http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Electrical Engineering
Metamaterials
non-asymptotic homogenization
effective medium theory
transfer matrix
Bloch wave
plasmonic medium
dynamic beam steering
tunable material parameter
global control
spellingShingle Electrical Engineering
Metamaterials
non-asymptotic homogenization
effective medium theory
transfer matrix
Bloch wave
plasmonic medium
dynamic beam steering
tunable material parameter
global control
Hossain, A N M Shahriyar
Metamaterials: 3-D Homogenization and Dynamic Beam Steering
author Hossain, A N M Shahriyar
author_facet Hossain, A N M Shahriyar
author_sort Hossain, A N M Shahriyar
title Metamaterials: 3-D Homogenization and Dynamic Beam Steering
title_short Metamaterials: 3-D Homogenization and Dynamic Beam Steering
title_full Metamaterials: 3-D Homogenization and Dynamic Beam Steering
title_fullStr Metamaterials: 3-D Homogenization and Dynamic Beam Steering
title_full_unstemmed Metamaterials: 3-D Homogenization and Dynamic Beam Steering
title_sort metamaterials: 3-d homogenization and dynamic beam steering
publisher University of Akron / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814
work_keys_str_mv AT hossainanmshahriyar metamaterials3dhomogenizationanddynamicbeamsteering
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