Banca de DEFESA: BRUNO SÁTIRO DA SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : BRUNO SÁTIRO DA SILVA
DATE: 16/02/2022
TIME: 09:00
LOCAL: https://meet.google.com/okv-mtxe-gqf
TITLE:

Equivalent Circuit Method Applied in Ring Geometries for Design of Selective Surfaces in Complementary Frequency

KEY WORDS:

Frequency selective surfaces, FSS, Complementary frequency selective surfaces, CFSS, ECM, Rings, Equivalent circuit model, Optimization.

PAGES: 111
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Telecomunicações
SPECIALTY: Teoria Eletromagnetica, Microondas, Propagação de Ondas, Antenas
SUMMARY:

The benefits of frequency-selective control of electromagnetic wave flow make frequency selective surface (FSS) a continuous subject of study in applied electromagnetism areas. With a wide range of applications in various engineering fields, FSS can be used, for example, as an antenna efficiency improvement tool, used for selective electromagnetic shielding, and even for fault detection in concrete structures such as bridge pillars. One particular class of FSS is the Complementary Frequency Selective Surface (CFSS) which has very interesting features together such as high angular stability, multiple transmission and/or reflection bands, and unit cell miniaturization. The analysis and design of this type of structure are commonly performed using commercial software that implements the so-called full-wave methods (FWM) which, despite having reliable responses, requires a license to use and demands high computational effort, impacting a longer time to obtain results. The Equivalent Circuit Model (ECM) provides approximate equations that, by calculating impedances related to unit cell geometry, model the behavior of frequency-selective surfaces in the frequency domain faster due to simplified formulas, which can be implemented in free software in many different programming languages, showing good agreement when compared to full-wave methods. This research aims to optimize the ECM when applied to complementary frequency selective surfaces formed by rings, uniting the interesting characteristics of both the cascade structure and the geometry. The study is paralleled with output techniques from transmission line theory and genetic algorithms for greater effectiveness of the method.

BANKING MEMBERS:
Presidente - 2524053 - ANTONIO LUIZ PEREIRA DE SIQUEIRA CAMPOS
Interno - 1422265 - JOSE PATROCINIO DA SILVA
Interno - 349732 - LAERCIO MARTINS DE MENDONCA
Externo à Instituição - ALFREDO GOMES NETO - IFPB
Externo à Instituição - MAURICIO WEBER BENJÓ DA SILVA - UFF