Banca de DEFESA: DIEGO RAMALHO MINERVINO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DIEGO RAMALHO MINERVINO
DATA : 14/12/2017
HORA: 09:00
LOCAL: AUDITÓRIO DO CTEC
TÍTULO:

New Antennas, Filters and FSSs Configurations with Fractal Contours and Metamaterials for Microwave and Millimeter Wave Applications

PALAVRAS-CHAVES:

Microstrip, filters, antennas, CPW, FSS, microwaves, millimeter waves

PÁGINAS: 116
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Telecomunicações
ESPECIALIDADE: Teoria Eletromagnetica, Microondas, Propagação de Ondas, Antenas
RESUMO:

In this work, new configurations of planar devices and circuits for microwave and millimeter wave applications and with fractal geometries, which are structures defined by a recurrence relationship of each point in space, are investigated and proposed. These fractal geometries are well known as set of Julia and Mandelbrot set. Specifically, we will investigate the distribution of currents on the surfaces of filter conductors, planar antennas and frequency selective surfaces (FSS) with the considered fractal geometries, for applications in both wireless communication systems and systems In the frequency range between 0.7 and 70 (GHz). Planar transmission structures such as the microstrip and coplanar waveguide lines (CPW) were considered in the development of filters and antennas with Euclidean and fractal geometries for millimeter wave applications. The choice of microstrip lines structures for the development of new antenna and filter configurations is justified by the wide application of these transmission lines in the last decades, always resulting in the manufacture of planar circuits with light structures, small dimensions, low cost, easy to build and, especially, easy to integrate with other microwave and millimeter wave circuits. The great interest in applications in the millimeter wave range is associated with the growth in the need to use the electromagnetic spectrum, the speed of transmission between circuits, such as, in the new types of computers, smartphones, smart TV and wireless, and in the reducing the components for use in millimeter and micrometric wavelengths. Initially, the study was aimed at microwave applications of the new fractals and metamaterials configurations in antennas fed by coaxial cable. In addition, the constructions and measurements of the prototypes developed for microwaves and millimeter waves were carried out in the laboratories of IST (Instituto Superior Técnico - Lisboa, PT). The simulations were carried out with the help of Ansoft Designer and Ansoft HFSS softwares. Comparisons between simulated and measured results were made to validate the work.

 

MEMBROS DA BANCA:
Presidente - 6345784 - ADAILDO GOMES D ASSUNCAO
Interno - 349732 - LAERCIO MARTINS DE MENDONCA
Externo à Instituição - ADAILDO GOMES D ASSUNCAO JUNIOR - IFPB
Externo à Instituição - ALFREDO GOMES NETO - IFPB
Externo à Instituição - GERVASIO PROTASIO DOS SANTOS CAVALCANTE - UFPA
Externo à Instituição - LUIZ ALENCAR REIS DA SILVA MELLO - PUC - RJ