Relevant bibliographies by topics / METAMATERIA

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  1. Dissertations / Theses

Academic literature on the topic 'METAMATERIA'

Author: Grafiati
Published: 11 September 2023

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Dissertations / Theses on the topic "METAMATERIA"

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Ni, Sisi (Sisi Sophie). "Phononic metamaterials based on complex geometries : "a new kind of metamaterial"." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89957.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Facing the growing challenges of energy, environment, security and disease treatment, the demand for novel materials are growing. While the material centric approach have resulted in development of new materials for advanced applications, we introduce a geometric approach as a complementary point of view for further innovation in this ever expanding and growing field. Inspired by the ubiquitous fractals
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Macêdo, Jorge Andrey da Silva. "Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/.

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Este trabalho apresenta um novo formalismo bi-dimensional em diferenças finitas no domínio do tempo (2D-FDTD) para a simulação de estruturas baseadas em metamateriais. A natureza dispersiva destes meios é levada em consideração de forma precisa pela inclusão dos modelos materiais de Drude para os tensores permissividade elétrica e permeabilidade magnética. Todos os elementos dos tensores são considerados neste formalismo, o que o torna muito atraente para a modelagem de uma classe geral de estruturas eletromagnéticas. Dois efeitos de enorme impacto são analisados em detalhes, sendo eles a cob
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Martínek, Luděk. "Antény s kryty z metamateriálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219978.

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This thesis deals with microstrip antennas covered by the metamaterials. First, are described planar antennas, their problems and the emergence of surface waves. Surface waves can cause unwanted coupling among particular parts of the structure and can degrade its parameters. The problem can be solved using an electromagnetic band gap structure (EBG). These periodic structures are able to suppress surface waves in different frequency bands. It is shown how the EBG structure in the function superstate improve directivity and antenna gain. Radiation conventional microstrip antenna with metallo-di
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Sartori, Eduardo Jose. "Metodologia experimental de desenvolvimento de grades metamateriais com permissividade quase-zero e negativa." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260806.

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Orientador: Hugo E. Hernandez Figueroa<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-14T23:26:41Z (GMT). No. of bitstreams: 1 Sartori_EduardoJose_D.pdf: 11903812 bytes, checksum: 6e06f001155d33b841c61ae93464c897 (MD5) Previous issue date: 2009<br>Resumo: Metamateriais são estruturas ou arranjos geométricos feitos a partir de materiais comuns, dielétricos, condutores, magnéticos ou por combinação destes. Os metamateriais caracterizam-se principalmente por apresentarem propriedades especiais de p
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Strikwerda, Andrew. "Metamaterial enhanced coupling." Thesis, Boston University, 2012. https://hdl.handle.net/2144/31611.

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Thesis (Ph.D.)--Boston University<br>PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>In the past decade interest in metamaterials has risen dramatically. This is due, in large part, to metamaterials' ability to exhibit electromagnetic behavior not normally found in nature. This is because the
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Li, Lianbo. "Metamaterial based superdirectivity." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:65f10679-cbf2-4c86-897e-8121225c44eb.

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A model-supporting, simple, compact, robust and high efficiency two- element parasitic superdirective array comprising electrically small reso- nant metamaterial elements, namely singly split resonator rings (SSRRs), is predicted by an analytical model and is verified by CST simulation re- sults. The analytical model is built by combining a method of calculating a two-SSRR array's far fild radiated energy density and a well working equivalent circuit for a two-SSRR parasitic array. This model is capable of easily but accurately predicting the far field radiation behaviours of an electrically s
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Shepard, III Ralph Hamilton. "Metamaterial Lens Design." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194734.

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Developments in nanotechnology and material science have produced optical materials with astonishing properties. Theory and experimentation have demonstrated that, among other properties, the law of refraction is reversed at an interface between a naturally occurring material and these so-called metamaterials. As the technology advances metamaterials have the potential to vastly impact the field of optical science.In this study we provide a foundation for future work in the area of geometric optics and lens design with metamaterials. The concept of negative refraction is extended to derive a c
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Ekmekci, Evren. "Design, Fabrication And Characterization Of Novel Metamaterials In Microwave And Terahertz Regions: Multi-band, Frequency-tunable And Miniaturized Structures." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612730/index.pdf.

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This dissertation is focused on the design, fabrication, and characterization of novel metamaterials in microwave and terahertz regions with the following outcomes: A planar &micro<br>-negative metamaterial structure, called double-sided SRR (DSRR), is proposed in the first part of this study. DSRR combines the features of a conventional split ring resonator (SRR) and a broadside-coupled SRR (BC-SRR) to obtain much better miniaturization at microwave frequencies for a given physical cell size. In addition to DSRR, double-sided multiple SRR (DMSRR), double-sided spiral resonator (DSR), and dou
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Tan, Szu Hau. "Metamaterial for Radar Frequencies." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17465.

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Approved for public release; distribution is unlimited<br>The objective of this thesis is to investigate a new design of periodic metamaterial (MTM) structure for radar cross-section (RCS) reduction application on aircraft and ships. MTMs are man-made materials, not found in nature, that exhibit unusual properties in the radio-, electromagnetic-, and optical-wave bands. The cells of these periodic MTM structures must be much smaller than the wavelength of the frequency of interest. In a MTM, the structure and dimensions of the design at the frequency of interest can produce negative values of
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Demetriadou, Angela. "Studies of metamaterial structures." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/11396.

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