Focusing Electromagnetic Radiation in Dielectric Media
Year: 2024
Type: dissertation
Abstract: Bioelectrics and microwave imaging requires an ultra-wideband (UWB) antenna to deliver intense, short electromagnetic pulses into biological targets for the purpose of therapy and imaging. Two antennas with different focal distances, predicted by a two dimensional model, have been designed for focusing electromagnetic radiation in the near field. Focusing is achieved through the use of prolate spheroidal reflector antennas with a conical wave launcher submerged in water. For an ultra-wideband feed signal, with a rise time of 200 picoseconds, the maximum electric field was found to be close to the edge of the reflector, a result that differs from the modeled results. When narrowband signals of 900 MHz and 1500 MHz are fed to the antenna, electric fields have been shown to focus near the focal point.
DOI: 10.25777/8f15-c005
Author: Migliaccio Jr., Mark A.
Institution: Old Dominion University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6926949086
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