posted on 2018-11-14, 17:06authored byMaria I. Kitra
The purpose of this project was the study of electrically small material coated
antennas. In particular the use of a hybrid dielectric–ferrite material was examined,
compared to dielectric alone, and ways it can improve antenna performance. The
benefits resulting from the inclusion of ferrite were examined using both analytical
and experimental methods.
Initially a spherical analytical mathematical model was developed, to examine
antenna efficiency, bandwidth and Specific Absorption Rate (SAR) in terms of
different mixtures of relative permittivity εr and permeability μr. The theoretical
model was then validated through a numerical transmission line matrix (TLM)
simulation tool, applied to spherical and rectangular resonator geometries. It was
observed that a material with equal values of relative permittivity and permeability in
combination with specific positioning of the antenna in relation to the head, can give
rise to the definitive small-size, high-efficiency, high-bandwidth, low-SAR antenna. [Continues.]
History
School
Mechanical, Electrical and Manufacturing Engineering
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
Publication date
2006
Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of the degree of Doctor of Philosophy at Loughborough University.