Análise de antenas planares para aplicações médicas nas bandas ISM de 435 MHz, 915 MHz e 2,45 GHz
Wireless devices are presented, in the most recent researches, as alternatives for monitoring various medical parameters, with applications in the frequency bands designated for Medical Device Radiocommunications Service - MedRadio (401 - 405 MHz), Medical Implant Communication Services - MICS (4...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/30836 |
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| Resumo: | Wireless devices are presented, in the most recent researches, as alternatives for
monitoring various medical parameters, with applications in the frequency bands
designated for Medical Device Radiocommunications Service - MedRadio (401 - 405
MHz), Medical Implant Communication Services - MICS (402 - 405 MHz) and
Industrial, Scientific and Medical - ISM (433 - 435.8 MHz; 902 - 928 MHz; 2.4 - 2.5
GHz), with the possibility of performing invasive and non-invasive analyzes on human
tissue or equivalent samples, replacing human tissue. In this dissertation, a parametric
analysis of three rectangular antennas is performed, with slits positioned close to the
edges of the patch, for sensing. Frequency responses of planar microstrip antennas with
medical applications in the ISM band are presented in the three frequency bands (433 -
435.8 MHz; 902 - 928 MHz; 2.4 - 2.5 GHz). The results of the simulations were obtained
by the Ansoft HFSS software for resonance frequency, bandwidth, reflection coefficient,
specific absorption rate and sensitivity. The measurements were performed with solid
samples of pork. A mathematical model was created to characterize the relative
permittivity of the samples. The simulated and measured results showed excellent
agreement and confirm the possibility of use in medical applications for monitoring and
transmitting information, in addition to measurements of meat properties, replacing
human tissue. |
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