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MSEE_thesis_Hossain_4567772.pdf (3.03 MB)
ETD Abstract Container
Abstract Header
Metamaterials: 3-D Homogenization and Dynamic Beam Steering
Author Info
Hossain, A N M Shahriyar
ORCID® Identifier
http://orcid.org/0000-0002-7077-0364
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814
Abstract Details
Year and Degree
2019, Master of Science in Engineering, University of Akron, Electrical Engineering.
Abstract
The first objective of this thesis is to explore an accurate two-scale homogenization technique of periodic electromagnetic structures or metamaterials having any number of dimensions. The fine-scale fields are approximated with a suitable set of basis functions in a unit cell. The coarse-grained field amplitudes are calculated as the boundary averages of the fine-scale fields. The effective material tensor is obtained in the least-squares sense. The proposed method accurately predicts the scattering parameters of a periodic layered medium, and of a 3-D plasmonic medium with any reasonable size and composition of the unit cell. A novel Bloch wave extraction procedure has been implemented for the 3-D case. A trade-off between the accuracy and the range of applicability of the effective material tensor has been discussed. In addition, metamaterials with resonating elements have been applied to dynamic beam steering. The resonators act as micro- or nano-antennas fed by a tunable metamaterial guide or metasurface. The novelty lies in the absence of any individual tuning circuitry for each resonator. Rather, a global control is effected by tuning the permittivity of the host material, or alternatively, by a multiguides concept. Optimized radiation profiles, and beam-scanning controlled in a dynamic fashion have been demonstrated.
Committee
Igor Tsukerman (Advisor)
Nathan Ida (Committee Member)
Nghi Tran (Committee Member)
Pages
97 p.
Subject Headings
Electrical Engineering
Keywords
Metamaterials
;
non-asymptotic homogenization
;
effective medium theory
;
transfer matrix
;
Bloch wave
;
plasmonic medium
;
dynamic beam steering
;
tunable material parameter
;
global control
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Citations
Hossain, A. N. M. S. (2019).
Metamaterials: 3-D Homogenization and Dynamic Beam Steering
[Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814
APA Style (7th edition)
Hossain, A N M Shahriyar.
Metamaterials: 3-D Homogenization and Dynamic Beam Steering.
2019. University of Akron, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814.
MLA Style (8th edition)
Hossain, A N M Shahriyar. "Metamaterials: 3-D Homogenization and Dynamic Beam Steering." Master's thesis, University of Akron, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574430585435814
Chicago Manual of Style (17th edition)
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Document number:
akron1574430585435814
Download Count:
400
Copyright Info
© 2019, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.