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Spring 2023
In this thesis, novel battery-less wireless sensor architectures and sensing elements are proposed and demonstrated. The proposed passive wireless sensor architectures integrate a UHF RFID chip, and a UHF sensing element to enable the reading of environmental conditions wirelessly, without...
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Design of Low-Profile Multi-Band Microwave Antennas and Components Using Metamaterial-Based Electromagnetic Bandgap Structures
DownloadSpring 2023
This thesis investigates applications of metamaterial-based electromagnetic bandgap structures, or MTM-EBGs. MTM-EBGs are uniplanar, compact, and often fully printable, making them ideal candidates for integration into planar topologies. This differs from many other metamaterial-based structures...
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Improving Data Throughput for Single-Conductor Wireless Power Transfer Systems Employing Sheath Helices
DownloadFall 2020
Historically, power transmission and data communication have been dealt with as separate problems. While communication has been conducted wirelessly for over a century, power has traditionally been transmitted via transmission line. However, the recent push for wireless power transmission (WPT)...
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Spring 2019
This thesis contains an overview and theory for a variety of antenna shielding structures, for the purpose of reducing interference and multipath issues due to the antenna's surrounding environment. Though such structures are relevant to a variety of applications, particular focus is given to...
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Theory and Applications of a Uniplanar Transmission-Line Metamaterial-Inspired Electromagnetic Bandgap Structure
DownloadFall 2015
A multitude of planar electromagnetic bandgap structures (EBGs) have been proposed for the suppression of parallel-plate waveguide (PPW) and surface-wave (SW) modes at microwave frequencies. Some of these structures have been well-modelled with transmission-line theory, however, these structures...
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Theory, Analysis, and Applications of Multidimensional, Multiconductor Transmission-Line Metamaterials
DownloadFall 2021
The past few decades have seen incredible growth in the interest of using periodic structures to improve the efficacy of microwave-frequency devices, since they provide access to dispersion-engineered phenomena such as bandgaps, group- and phase-velocity control, and advanced resonance behaviors....
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Wireless sensing systems based on passive UHF RFID technology for physical parameters measurement
DownloadSpring 2023
Sensing and monitoring using the conventional microwave, optical, and waveguide methods have been the focus of many researchers for the past two decades. However, the limitations imposed by these techniques such as power inefficiency and the use of complex readout circuitries are the important...