Global ETD Search
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 20 of 23 for “"electromagnetic coupling"”.
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Models for electromagnetic coupling of lightning onto multiconductor cables in underground cavities
… analytical modeling, and numerical modeling of electromagnetic transfer functions to quantify the ability of cloud-to-ground lightning strokes (including horizontal arc-channel components) to couple electromagnetic energy onto multiconductor cables in an underground cavity. Measurements were …
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Identification and visualization of electromagnetic coupling paths & nonlinear capacitors for ESD protection
… on developing methods to identify and visualize electromagnetic coupling paths. The basis of the approach is to utilize an analogy between electromagnetic energy flow and fluid flow. This allows one to apply the theories and algorithms of fluid dynamics to electromagnetics and thereby to …
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An investigation of the electromagnetic coupling problem by means of a rational framework and selected experiments
To analyze electromechanical interactions, electromagnetic coupling models are required. Identifying a suitable electromagnetic coupling model for a given application is a challenging task since there exists a multitude of different models in the literature and not all of these models are …
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Simulation study of electromagnetic coupling in a UHF biotelemetry link for an artificial hip joint, A
Includes bibliographical references (pages 65-67).
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EXPERIMENTAL AND MODELING ANALYSIS OF ELECTRIC SYSTEMS WITH HIGH CAPACITIVE AND INDUCTIVE COUPLINGS
… Systems with High Capacitive and Inductive Couplings investigates several kinds of electromagnetic coupling which inuence strongly the electric system operation. The electromagnetic coupling is a fundamental phenomenon that governs the behaviour of many electrical devices, but on the other …
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Integrated diffractive optical elements for terahertz beam shaping and polarization control /
… subwavelength resonators engineered to exploit electromagnetic coupling and anapole resonances for enhanced transparency and spectral control. Numerical simulations and experimental validations confirm the capability of these compact, lightweight, and integrable elements to deliver high …
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Substrate resistance extraction using a multi-domain surface integral formulation
… designs carry the additional design burden of electromagnetic coupling between contacts. This thesis presents a method that quickly extracts the electroquasistatic coupling resistances between contacts on a planar, rectangular, two-layer lossy substrate, using an FFT-accelerated multi-domain …
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Application of the spectral domain technique to discontinuity and spurious radiation problems in microwave circuits
… spectral domain formulation of the problem of electromagnetic coupling through apertures in a planar conducting screen is presented. This method is validated by analyzing resonant slots and comparing the results to previously published findings. Second, a class of slotted guiding structures is …
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The QED beta-Function: A First Principles Derivation
… physical consequences, such as running coupling constants and anomalous dimensions. Of primary interest to this presentation is the beta-function of QED, a result of the renormalization group that describes the dependence of the electromagnetic coupling on particle momentum. The …
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Resonance-Based Techniques for Microwave Breast Cancer Applications
… the resonances, it is expected that an increased electromagnetic coupling would take place at the resonance frequencies compared to other frequencies. For a breast tumor, this would mean a higher power absorption, indicating a faster temperature increase resulting in more efficient hyperthermia. …
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A STUDY OF CERTAIN ELECTROMAGNETIC INTERACTIONS AMONG HIGH OPTICAL CONDUCTIVITY NANOSPHERES AND DIELECTRIC HALF-SPACES
<p>Electromagnetic coupling between a sphere and a semi-infinite substrate, and among several spheres present in the form of a composite were studied in this dissertation. Specifically, spheres made of noble metals such as Ag, Au and Cu and relatively high refractive index substrates and composite …
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Electrical characterization of high temperature superconductors as a function of temperature
… The AC losses of both samples displayed complete electromagnetic coupling of the superconducting filaments at magnetic sweep frequencies of approximately 0.1 Hz. These results are consistent with results measured at magnetic field sweep frequencies of 60 Hz.
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Structure and Properties of Nano- and Meso-scale Materials Prepared by Designed Self-Aasembly of Nanoparticles
… co-linearity increased, both allowing for better electromagnetic coupling between the nanorods. In chapter 4, we further explored the resemblance between colloidal and molecular polymerization reactions by applying strategies from molecular copolymerization to the co-assembly of gold nanorods with …
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Merged multi-stage power conversion : a hybrid switched-capacitor/magnetics approach
… distribution in planar magnetics. It captures electromagnetic coupling relationships using an analytical lumped circuit model, and enables rapid evaluation of planar magnetics designs. The effectiveness of the model is verified by numerical methods and experimental measurements. A software …
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Non-Linear Magnetosphere-Ionosphere Interactions at High Latitudes
<p>Non-linear, 3D electromagnetic coupling between the ionosphere and magnetosphere is investigated in this dissertation. The study is based on a non-linear, 3D, reduced magnetohydrodynamic model describing interaction between dispersive Alfven waves and the nightside high-latitude ionosphere. …
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Crosstalk mitigation of high-speed interconnects using modal signaling
… are being used, thus causing increased levels of electromagnetic coupling between interconnects. This results in various signal integrity impairments, which in turn limit the system performance and signaling rate. The focus of this research is to explore the application of modal decomposition of …
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Geomagnetic Impulses and the Electrical Conductivity of the Lower Mantle
… anti-correlated with the 1970 jerk. The role of electromagnetic coupling between the core and mantle is considered in the presence of a thin conducting layer at the base of the mantle. Time-dependent torques are computed for the period 1900 to 1980 and found to correlate closely with the torque …
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Synthesis Technique of Thickness-Customizable Multilayered Frequency Selective Surface for Plasma-Based Electromagnetic Structures
… bandwidth. These inverter layers are essentially electromagnetic coupling interlayers that can be adjusted to customize the thickness of multilayered FSS without degrading the desired filter performance. A generalized equivalent circuit model is used to provide physical insights of the proposed …
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Experimental and analytical study of electrical crosstalk in CMB cold readout systems and implications for power spectra
… inductance crosstalk, arising from possible electromagnetic coupling between spiral inductors; and common impedance crosstalk, caused by the presence of a non-zero inductance in series with all the multiplexing branches. The LC filters chip design, together with the sequence of the …
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Analysis and design of planar slot antennas for RFID applications using characteristic mode theory
… HF use simple loop variants to achieve magnetic coupling between the reader and the tag and have limited range (1 m). Improved communication range of up to 6 m can be achieved in the UHF band. Most systems in the UHF band make use of planar antennas with good radiation characteristics to achieve …
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