Loading...
Computational investigations of open-circuit spiral resonators for biomedical sensing applications
Sutton, Mark
Sutton, Mark
Citations
Altmetric:
Files
Loading...
thesis
Adobe PDF, 12.63 MB
Authors
Other Names
Location
Time Period
Advisors
Original Date
Digitization Date
Issue Date
2019-12
Type
Thesis
Genre
Keywords
Subjects (LCSH)
Electronic dissertations
Citation
Abstract
Radio and microwave sensing and imaging technologies are attractive for
applications where traditional techniques require an invasive operation or that the
patient be exposed to harmful ionizing radiation, as in an x-ray or computed tomography
scan. Radio and microwaves have a wavelength long enough that it cannot ionize
atoms in the body, making it safer than x-ray techniques while still penetrating through
tissue. Recently, a flexible and wearable electromagnetic resonator sensor in the form
of a single-arm Archimedian spiral wirelessly powered by a coplanar loop antenna has
emerged as a promising design for noninvasively monitoring a variety of physiological
parameters like heart rate, left ventricular stroke volume from the heart, and intracranial
pressure. These spirals have multiple resonant frequencies in the radio and microwave
frequency range that are modulated by the electrical properties of the tissue around it.
Thus, a shift in resonant frequency is believed to correspond to physiological changes in
the body by altering its effective electrical properties. In this thesis, two successful
resonator designs, a square and circular spiral, are modeled, simulated, and analyzed
using computational electromagnetics software. Analyses performed include
characterization of the radiation patterns of the resonator, a specific absorption rate
study to evaluate the amount of energy absorbed by the body from exposure to
radiation emitted from the resonator, and a validation of the suspected operating
principle of the resonators in two biomedical applications: arterial pulse detection and
intracranial hemorrhage detection. Finally, the use of a spiral resonator for imaging
applications is briefly investigated.
Table of Contents
Description
Thesis (M.S.)-- Wichita State University, College of Engineering, Dept. of Biomedical Engineering
Publisher
Wichita State University
Journal
Book Title
Series
Digital Collection
Finding Aid URL
Use and Reproduction
Copyright 2019 by Mark Sutton
All Rights Reserved