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 26 for “"Circuit Modeling"”.
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Circuit modeling and optimization techniques for next-generation radar.
… will require well-designed, reconfigurable circuitry to coexist with the myriads of wireless devices using the spectrum. There are two main goals of this research. The first goal is to demonstrate circuit optimization algorithms implemented in real-time with two types of fast tuners. The …
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SOI Circuit Design Styles and High-Level Circuit Modeling Techniques
… several or many gates. Therefore, accurately modeling noise propagation (from a cell's inputs to its outputs) is of significant importance for cell-based noise analysis tools. We propose and implement two new macromodeling techniques for purposes of building a noise-rule library. Our models …
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Signal integrity diagnosis and physical-based circuit modeling for 5G/6G connectors in high-speed electrical links
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Incorporation of feed-network and circuit modeling into the time-domain finite element analysis of antenna arrays and microwave circuits
… developed to incorporate the feed-network and circuit modeling into the time-domain finite element analysis of antenna arrays and microwave circuits. First, simulation of an antenna system requires accurate modeling of interactions between the radiating elements and the associated feeding …
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Modeling of electrical circuit with recurrent neural networks
In this dissertation, a circuit modeling methodology using recurrent neural networks (RNNs) is developed. The methodology covers model structure selection, data generation, training, and model implementation for circuit simulation. Several different RNN structures are investigated and their …
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High-speed modulation of resonant CMOS photonic modulators in deep-submicron bulk-CMOS
… monolithic process. A digital modulator driver circuit is designed, simulated, fabricated and partially tested. This circuit uses a push-pull topology with pre emphasis to reduce the energy per bit and to prevent the ring's optical passband from shifting to the next optical channel. A flexible …
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Heat Transfer Enhancement using Iron Oxide Nanoparticles
… less than 33 nm. Calorimetry and thermal circuit modeling indicate that the 15 nm particle ferrofluid enhanced heat capacity. The smaller particle ferrofluid also demonstrated up to a 39% improvement in heat transfer, while the larger particle ferrofluid degraded the heat transfer …
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Importance of Detailed Modeling of Loads/PV Systems Connected to Secondary of Distribution Transformers
… In the work here we consider two secondary circuit modeling approaches, simple secondary and detailed secondary models. In simple secondary models all loads and all PV generators below a distribution transformer are modeled as an aggregate load and an aggregate PV generator. In the detailed …
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Scalable Electrochemical Surface Enhanced Raman Spectroscopy (EC-SERS) for bio-chemical analysis
… spectroscopy (EIS) measurements and equivalent circuit modeling-analysis, we can decompose the overall impedance of MWCNT/polymer nanopillar arrays in the electrolyte into multiple bulk and interfacial circuit components, and thus can illustrate their different dependence on the MWCNT ratios and …
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Synthesis and Characterization of Branched Ionomers for Performance in Ionic Liquid – Swollen Ionic Polymer Transducers
… and actuation characteristics. Equivalent circuit modeling of the component and transducer electrical impedance accurately modeled variations in contributing processes and material interfaces to estimate the evolution of effective capacitance based on the electrode composition. Combination …
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The impact of conventional and wide bandgap semiconductor PWM inverter EDM bearing currents on motor bearings.
… This dissertation presents detailed discharge circuit modeling of motor bearing currents, investigates the impact of discharge energy on the damage produced on the bearing race and ball surfaces through the use of a finite element (FE) model, presents a novel technique to statistically …
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INTERFACES IN THIN-FILM SOLID-STATE BATTERIES
… using shadow masks. Physics-based electric circuit models were designed for deconvolution of impedance profiles, which enabled an evaluation of bulk properties and space-charge layers at interfaces individually and during operation under different states-of-charge. Relative permittivity …
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EMI measurement and modeling techniques for complex electronic circuits and modules
… of a magnetic field loop (i.e., a parallel LC circuit). Measurement results showed good agreement with the simulated results.</p> <p>In the third paper, a wideband microwave method was developed as a means for rapid detection of slight dissimilarities (including counterfeit) and aging effects …
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Characterizing and using defects in high-temperature superconductor cables and magnets
… platform coupled to high-fidelity computational modeling is developed and the concept of using defects as a tool for controlling current distribution in HTS cables is explored. The cable (critical current = 438 A at 77.3 K, self-field) comprises a non-twisted 70 cm-long copper former containing a …
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Development of measurement techniques for evaluation of inhibitors for controlling rebar corrosion in concrete
… EIS data analysis system. This allowed for circuit modeling of the corrosion mechanisms and evaluation of polarization resistance values for the different specimens. In both phases of this work, chloride concentration profiles as function of depth were determined. The half-cell potential …
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Design, Development, and Calibration of an Electric Field Probe for Use on Sounding Rockets
… softwares (which use industry standard SPICE circuit modeling) the board is designed and constructed. After construction, the board undergoes rigorous testing to characterize and validate its performance: including testing in an artificial plasma-vacuum environment. After the board is …
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Computational Modeling Of High-Performance Nickel-Metal Hydride Battery Materials
… and through Rietveld refinement and DIFFaX modeling of the different types of stacking faults, the evolution of the stacking faults was tracked over precipitation time for different compositions. We determined which types of stacking faults have a stronger effect on the (101) peak, and the …
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Modeling of conductor surface roughness effect
… the impact of conductor surface roughness on the modeling and simulation used in support of the design of such devices. This thesis focuses on methodology of conductor surface roughness effect modeling, which provides accurate and efficient prediction using currently available commercial …
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Loosely Coupled Transformer and Tuning Network Design for High-Efficiency Inductive Power Transfer Systems
… in the IPT systems, a detailed electric circuit modeling of individual part of the IPT DC-DC stage is performed. Several resonant DC-AC inverters and output AC-DC rectifiers are compared based on their performance and feasibility in inductive charging applications. Different equivalent …
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