Extraordinary magnetoresistance (EMR) in semiconductor-metal hybrids has been studied exclusively for sensor applications. However, some properties of EMR-based devices are potentially advantageous for power applications. A PSPICE finite-element model has been developed to aid i…
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The use of induction motors in modern industry become increasingly high. Induction motor starting phenomenon has an important impact on the industrial loads and dynamics of the power system. Induction motor consumes tremendous amount of reactive power during starting, resulting …
The mains current in an ac/dc converter contains periodic current pulses due to the action of rectifier and output filter capacitor. The high current peaks cause harmonic distortion of the supply current and low power factor. This results in a poor power quality, voltage distort…
3D additive printing technology has been employed recently for manufacturing of a wide variety of radio frequency (RF) circuits; particularly it is very attractive for composite manufactured structures in conformal (non-planar) shapes, such as magnetically tuned antenna arrays f…
This dissertation presents the design and performance analysis of five-phase ferrite permanent magnet assisted synchronous reluctance motor (Fe-PMaSynRM). The risk of irreversible demagnetization and mechanical deformation are two major challenges in the five-phase Fe-PMaSynRMs.…
Carbon nanotube (CNT) composites have been of significant research interest in a wide range of applications. For electromagnetic applications, simplifying assumptions regarding the distribution and shapes of the CNTs are typically made because the exact three-dimensional CNT dis…
The problem of detecting a defect inside the material in an ultrasonic non-destructive testing (NDT) session is addressed in this dissertation. What makes this problem a difficult one is the presence of clutter noise, which is signal-dependent noise. The clutter noise in the mat…
The goal of this work is to advance a novel nondestructive testing (NDT) method for controlled, rapid, and effective inspection of a structure through the integration of microwave NDT and thermography, referred to as Active Microwave Thermography (AMT). In AMT, the structure und…
The electrification in the transportation sectors such as those with electric vehicles, drones, UAV, and air-taxi is progressing at an unprecedented pace. As a result, the need for high performance (high power density and high efficiency) permanent magnet (PM) electric machines …
Recently a class of biologically-inspired electrically-small antenna arrays have been reported. Referred to as biomimetic antenna arrays (BMAAs), these antennas mimic the hyperacute senses of directional hearing of small animals. First we present a two-element tunable biomimetic…
One of the main issues with micron-sized intracortical neural interfaces (INIs) is their long-term reliability, with one major factor stemming from device material failure caused by the heterogeneous integration of multiple materials used to realize the implant. Single crystalli…
Monitoring and maintaining civil, space, and aerospace infrastructure is an ongoing critical problem facing our nation. As new complex materials and structures, such as multilayer composites and inflatable habitats, become ubiquitous, performing inspection of their structural in…
Microgrids representing localized small-scale power systems are capable of operating as self-controlled entities, which cluster and manage distributed energy resources (DERs) and other smart devices within a defined electrical boundary. By utilizing locally available resources, …
Microwave and millimeter wave reflectometry and synthetic aperture radar (SAR) imaging techniques have been successfully applied in many applications, such as nondestructive testing and evaluation (NDT&E), security inspection and medical diagnosis. In this dissertation, the feas…
Given the limited spectrum resources, planning of the future wireless networks such as fifth generation and beyond to be deployed in very congested and complex electromagnetic environments requires techniques for efficient co-channel external and internal (self-) interference ca…
In this dissertation, a core design is proposed to minimize the core loss of a high-power wireless charging system (WCS). The core-loss characteristics are investigated through finite element analysis (FEA). Compared to the traditional uniform thickness core, in the proposed cor…
In this thesis, the synergy between millimeter-wave (mmWave) imaging and wireless communications is used to achieve high accuracy user localization and mapping (SLAM) mobile users in an uncharted environment. Such capability is enabled by taking advantage of the high-resolution …
Arsenic in drinking water is a major public health problem threatening the lives of over 140 million people worldwide. In Bangladesh alone, up to 57 million people drink arsenic-laden water from shallow wells. ElectroChemical Arsenic Remediation (ECAR) overcomes many of the obst…
This research dissertation has three objectives. The first objective is to develop a Lagrangian formulation of the canonical proper-time many-particle theory for classical electrodynamics. The original approach was based on the Hamiltonian formulation, assuming that the retarded…