Banca de QUALIFICAÇÃO: MATHEUS EMANUEL TAVARES SOUSA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : MATHEUS EMANUEL TAVARES SOUSA
DATE: 07/12/2022
TIME: 09:00
LOCAL: https://meet.google.com/okv-mtxe-gqf
TITLE:

Application of Hospital Textile Materials as Dielectric Substrates on Frequency Selective Surfaces

KEY WORDS:

: Textile substrates, textile frequency selective surfaces, textile antenna, electrical characterization.

PAGES: 75
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUMMARY:

This work presents the simulated and experimental analyses of antennas and frequency selective surfaces with textile substrates made of cotton and polyester, based on the technical standard ABNT NBR 13734: 2016 - Textile products for health, for operation on ISM 2,4 GHz frequency band. For the design of the antennas and selective surfaces in textile frequencies, three textile materials with different proportions of cotton and polyester were selected and, using the coaxial probe technique, the electrical characterization of the three textile materials was carried out to obtain the electrical permittivity and loss tangent as a function of electrical frequency. The experimental data resulting from the electrical characterization were exported to the commercial software ANSYS HFSS®. The antennas were designed for a fully filled ground plane and rectangular patch fed by a microstrip line, and their dimensions were determined from the Transmission Line Model. The reflection coefficient observed the experimental operation of the antennas within the range of interest as a function of frequency. The frequency-selective surfaces were designed with square spirals with optimized dimensions based on experimental data from the electrical characterization of textiles that were exported to the software. The transmission coefficient observed the practical operation of the frequency-selective surfaces within the range of interest as a function of frequency. For the frequency range of interest, the textiles presented uniformity in electrical permittivity and loss tangent, and all structures (antennas and frequency selective surfaces) operated within the 2.4 GHz ISM band.

COMMITTEE MEMBERS:
Presidente - 2524053 - ANTONIO LUIZ PEREIRA DE SIQUEIRA CAMPOS
Interno - 1422265 - JOSE PATROCINIO DA SILVA
Externo à Instituição - HUMBERTO DIONISIO DE ANDRADE - UFERSA