Low-SAR ferrite handset antenna design
Maria I. Kitra
2134/35984
https://repository.lboro.ac.uk/articles/thesis/Low-SAR_ferrite_handset_antenna_design/9536132
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.]
2018-11-14 17:06:01
untagged
Mechanical Engineering not elsewhere classified