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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Split Ring Resonators"”.
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Nanophotonic split-ring resonators as dichroics for molecular spectroscopy
… vibrational spectroscopy. Through strict engineering of structural morphology, a nanometal’s free electrons can be tuned to resonate at a particular frequency, resulting in amplification and confinement of the electromagnetic field around certain areas of the structure. Molecules situated within …
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Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… of experiments approaches in the analysis of split ring resonators, and to compare two different approaches. The design parameters of the meta-material device are examined to study all the main effects, the two factor interactions, and the curvature effects. A full factorial design and a …
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Superdirectivity and the Application of Complementary Split Ring Resonators in Directivity Enhancement of Millimeter-Wave Antennas
… is developed using a new approach. Complementary split ring resonators are used to enhance directivity and manipulate the complex current distribution over a printed dipole. Systemic design approaches are presented using characteristic mode analysis, small dipole modeling, and transmission line …
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Frequency and Field Strength Materials Characterization with Complementary Split-ring Resonators, Coplanar Waveguides, and the Virtual Ground Method
In the radiofrequency bands, measuring the power-dependent complex permittivity and permeability of materials that undergo metal–insulator transitions is a significant challenge which is important for defense and commercial applications. This thesis attempts to articulate barriers in the prior art, …
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Terahertz response of microfluidic-jetted fabricated 3D flexible metamaterials
… layers with conventional designs such as single ring- split ring resonators (SRR) and microstrips to form a 3D metamaterial structure. Conductive nano-particle Ag, Cu and semiconductor polymer fluids are used as structural mediums. The metamaterials are fabricated on polyimide substrate. Their …
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Inverse problems in electromagnetics
… bianisotropic metamaterial that consists of split-ring resonators, which signifies that the cross polarization terms of the metamaterial are quantitatively investigated for the first time. Finally, an optimization approach is designed to achieve the retrieval of general bianisotropic media …
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Analysis, design, and implementation of a reconfigurable fractal volumetric left-handed metamaterial
… LHM operates at, and 2) a novel arrangement of Split Ring Resonators (SRR) based on the Sierpi\u0144ski carpet fractal pattern with two SRR sizes. Reconfigurability is implemented by cutting two splits of different widths in each ring of the SRRs. These SRRs are simulated with switches in the ON …
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Topology optimization of metamaterials and applications to RF component design
… with the most common metallic inclusions being split ring resonators and their derivatives. Unfortunately, these resonant structures have limited flexibility since their design involves very few parameters such as ring radii and slot widths, which do not allow for much tuning of the material …
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Utilizing equivalent circuits to describe the strain- and temperature-dependence of electromagnetic metamaterials
… understanding is crucial for developing engineering-quality predictions of the EM performance of metamaterial structures in a relevant environment, a crucial step in transitioning this technology from laboratory novelty to fielded capability. This study leverages equivalent circuit models to …
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Artificial engineered materials for novel accelerator applications
… comprises of sheets of Complementary Split Ring Resonators (CSRRs). These CSRRs act as a left handed medium at certain frequencies allowing the structure to be used for the generation of reverse Cherenkov radiation. The proposed initial design exhibits a left handed TM31-like mode at …
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Split Ring Resonator (SRR) based metamaterials
… than that of the wavelength of light. The Split ring resonator (SRR) is such a nanostructure that forms the basic unit of a metamaterial. Since the dimensions of the SRRs are required to be smaller than the resonance wavelength, it becomes critical when response is required at the near …
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Metamaterial enhanced coupling
… the coupling between a pair of identical split ring resonators, and develops a general framework for evaluating the mode hybridization that results from their near field interaction. In fact, we find that the near field coupling is extremely sensitive to the relative orientation of the two …
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Terahertz metamaterials for sensing and detection
… terahertz frequencies was investigated including split-ring resonators, perfect absorbers, and flexible absorbers. The devices were designed through simulation by finite element method commercial software and fabricated by photolithographic lift-off process using electron beam evaporation for the …
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High power microwave generation using an active metamaterial powered by an electron beam
… plates that were machined with complementary split ring resonators with periods ranging from 5 to 10 mm. The metamaterial waveguides supported two distinct modes: a symmetric mode that occurs when the two metamaterial plates were excited in phase, and an antisymmetric mode that occurs when the …
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Investigation of Integrated Decoupling Methods for MIMO Antenna Systems. Design, Modelling and Implementation of MIMO Antenna Systems for Different Spectrum Applications with High Port-to-Port Isolation Using Different Decoupling Techniques
… performance have been reported in terms of scattering parameters, envelope correlation coefficient (ECC), total active reflection coefficient (TARC), channel capacity loss (CCL), diversity gain (DG), antenna efficiency, antenna peak gain and antenna radiation patterns. Three new 2×2 MIMO array …
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Remote-Controlled Self-Assembly of Three-Dimensional Micro Structures for Ultra-Sensitive Sensors and Three-Dimensional Metamaterials
… advanced metamaterial (MM) designs, and exploring their potential applications as 3D sensors and devices. The goal of the work is to achieve advanced remotely controlled self-assembly to improve the yield and manipulative capability of the assembly process and discover new aspects of the …
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The study of plasmonics in nanohole metallic metamaterials
Plasmonics is the study of light-matter interaction. The interaction of incident light (photons) with surface plasmons present in metamaterials results in unique optical properties. Nanohole arrays are a metamaterial consisting of an array of sub-wavelength holes perforated in an optically thin …
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Filtros distribuidos y localizados en tecnología mixta microstrip/Guía coplanar
… en concreto, resonadores en espiral (SR, Spiral Resonators), y resonadores de salto de impedancia plegados (FSIR, Folded Stepped Impedance Resonator) modificados. Con los primeros se han diseñado filtros paso de banda con dos ceros de transmisión a frecuencias finitas, verificándose una …