Browsing by Subject "Electromagnetics"
Now showing items 1-20 of 38
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3D Microwave Imaging through Full Wave Methods for Heterogenous Media
(2011)In this thesis, a 3D microwave imaging method is developed for a microwave imaging system with an arbitrary background medium. In the previous study on the breast cancer detection of our research group, a full wave inverse ... -
A CG-FFT Based Fast Full Wave Imaging Method and its Potential Industrial Applications
(2015)This dissertation focuses on a FFT based forward EM solver and its application in inverse problems. The main contributions of this work are two folded. On the one hand, it presents the first scaled lab experiment system ... -
A Hybrid Spectral-Element / Finite-Element Time-Domain Method for Multiscale Electromagnetic Simulations
(2010)In this study we propose a fast hybrid spectral-element time-domain (SETD) / finite-element time-domain (FETD) method for transient analysis of multiscale electromagnetic problems, where electrically fine structures with ... -
Accurate and Efficient Methods for the Scattering Simulation of Dielectric Objects in a Layered Medium
(2019)Electromagnetic scattering in a layered medium (LM) is important for many engineering applications, including the hydrocarbon exploration. Various computational methods for tackling well logging simulations are summarized. ... -
Actively Tunable Plasmonic Nanostructures
(2020)Active plasmonic nanostructures with tunable resonances promise to enable smart materials with multiple functionalities, on-chip spectral-based imaging and low-power optoelectronic devices. A variety of tunable materials ... -
Adaptive Discontinuous Galerkin Methods Applied to Multiscale & Multiphysics Problems towards Large-scale Modeling & Joint Imaging
(2019)Advanced numerical algorithms should be amenable to the scalability in the increasingly powerful supercomputer architectures, the adaptivity in the intricately multi-scale engineering problems, the efficiency in the extremely ... -
An Asymptotic Model of Electroporation-Mediated Molecular Delivery in Skeletal Muscle Tissue
(2014)Electroporation is a biological cell's natural reaction to strong electric fields, where transient pores are created in the cell membrane. While electroporation holds promise of being a safe and effective tool for enhancing ... -
Analytic Model, Design of Waveguide-fed Metasurface Antennas and Applications to MIMO Communication Systems
(2020)This dissertation focuses on the analytic model and design of waveguide-fed meta- surface antennas using the coupled-dipole method. In particular, it is demonstrated that the coupled-dipole method can be combined with models ... -
Analytical Modeling of Waveguide-fed Metasurfaces for Microwave Imaging and Beamforming
(2018)A waveguide-fed metasurface consists of an array of metamaterial elements excited by a guided mode. When the metamaterial elements are excited, they in turn leak out a portion of the energy traveling through the waveguide ... -
Coded Aperture Magnetic Sector Mass Spectrometry
(2015)Mass spectrometry is widely considered to be the gold standard of elemental analysis techniques due to its ability to resolve atomic and molecular and biological species. Expanding the application space of mass spectrometry ... -
Compatible Subdomain Level Isotropic/Anisotropic Discontinuous Galerkin Time Domain (DGTD) Method for Multiscale Simulation
(2015)Domain decomposition method provides a solution for the very large electromagneticsystem which are impossible for single domain methods. Discontinuous Galerkin(DG) method can be viewed as an extreme version of the domain ... -
Design, Analysis, And Characterization Of Metamaterial Quasi-Optical Components For Millimeter-Wave Automotive Radar
(2013)Since their introduction by Mercedes Benz in the late 1990s, W-band radars operating at 76-77 GHz have found their way into more and more passenger cars. These automotive radars are typically used in adaptive cruise control, ... -
Development of Analog Nonlinear Materials Using Varactor Loaded Split-ring Resonator Metamaterials
(2013)As research in electromagnetics has expanded, it has given rise to the examination of metamaterials, which possess nontrivial electromagnetic material properties such as engineered permittivity and permeability. Aside from ... -
Dynamic Metasurface Apertures for Computational Imaging
(2018)Microwave imaging platforms conventionally take the form of antenna arrays or synthetic apertures. Inspired by methods in the optical regime, computational microwave imaging has recently taken hold as an alternative approach ... -
Efficient Computation of Electromagnetic Waves in Hydrocarbon Exploration Using the Improved Numerical Mode Matching (NMM) Method
(2016)In this study, we developed and improved the numerical mode matching (NMM) method which has previously been shown to be a fast and robust semi-analytical solver to investigate the propagation of electromagnetic (EM) waves ... -
Efficient Electromagnetic Simulation and Experiment Tools for Hydraulic Fracture Evaluation
(2019)Hydraulic fracturing is an essential way to improve the production of unconventional oil and gas, especially shale gas. Therefore, it is important to characterize the produced fractures using either acoustic or electromagnetic ... -
Electromagnetic Forward Modeling and Inversion for Geophysical Exploration
(2015)Electromagnetic forward modeling and inversion methods have extensive applications in geophysical exploration, and large-scale controlled-source electromagnetic method has recently drawed lots of attention. However, to obtain ... -
Exploiting Near Field and Surface Wave Propagation for Implanted Devices
(2014)This thesis examines the bandwidth shortcomings of conventional inductive coupling biotelemetry systems for implantable devices, and presents two approaches toward an end-to-end biotelemetry system for reducing the power ... -
Fast Large-Scale Electromagnetic Simulation of Doubly Periodic Structures in Layered Media
(2020)This work focuses on the electromagnetic simulation of doubly periodic structures embedded in layered media, which can be commonly found in extreme ultraviolet (EUV) lithography, metasurfaces, and frequency selective surfaces. ... -
Fluid Flow and Electromagnetic Fields Modeling for Geophysical Subsurface Sensing
(2018)Crosswell electromagnetic (EM) fields measurement has been widely applied in oil industry which has a reservoir scale detection range. One of the limitation of this technique is that the EM singals are usually too weak to ...
