FONTGALLAND, C.; http://lattes.cnpq.br/4256595317953538; FONTGALLAND, Glauco.
Resumen:
In this dissertation a bibliographical review is made on the modalities of thermotherapy
known as DIATHERMY and HIPERTHERMY, as well as a description
of the main techniques and applicators used in these treatements. Aiming to set the
object of study in an electromagnetic context, some underlying principles on the behaviour
of a biological tissue in terms of frequency of the applied field are presented,
besides the main effects of non-ionizing radiation on them. Some relevant aspects of
safety standards adopted in Brazil are discussed, concerning level and exposure time
of non-ionizing electromagnetic energy.
A review of antenna theory is presented and special emphasis is given to helical
antennas, antenna arrays, passive reflectors and Geometric Optics. These theoretical
considerations are then used in writing a computer program for the design of a primary
helical antenna radiating in the axial mode. Increased directivity and the effects of
plane, conic and elliptical reflectors on it are considered by the program.
A second program allows the determination of the shape of a reflector, given the
characteristics of the primary antenna (feeder) and of the desired secondary aperture
field. A good agreement is found between theoretical and experimental results.
Some conclusions are drawn from the dissertation and we hope i t will open new
avenues for future work on medical applications of electromagnetic fields.
