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Previous issue date: 2010-06-11 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work has as main objective the study of arrays of microstrip antennas with superconductor rectangular patch. The phases and the radiation patterns are analyzed. A study of the main theories is presented that explain the microscopic and macroscopic phenomena of superconductivity. The BCS, London equations and the Two Fluid Model, are theories used in the applications of superconductors, at the microstrip antennas and antennas arrays. Phase Arrangements will be analyzed in linear and planar configurations. The arrangement factors of these configurations are obtained, and the phase criteria and the spacing between the elements, are examined in order to minimize
losses in the superconductor, compared with normal conductors. The new rectangular patch antenna, consist of a superconducting material, with the critical temperature of 233 K, whose formula is Tl5Ba4Ca2Cu9Oy, is analyzed by the method of the Transverse nTransmission Line (TTL), developed by H. C. C. Fernandes, applied in the Fourier Transform Domain (FTD). The TTL is a full-wave method, which has committed to obtaining the electromagnetic fields in terms of the transverse components of the structure. The inclusion of superconducting patch is made using the complex resistive boundary condition, using the impedance of the superconductor in the Dyadic Green
function, in the structure. Results are obtained from the resonance frequency depending on the parameters of the antenna using superconducting material, radiation patterns in
E-Plane and H -Plane, the phased antennas array in linear and planar configurations, for different values of phase angles and different spacing between the elements / Este trabalho tem como objetivo principal o estudo dos arranjos de antenas de microfita com patch retangular supercondutor. S?o analisadas as fases e os diagramas de radia??o. ? apresentado um estudo das principais teorias que explicam o fen?meno microsc?pico e macrosc?pico da supercondutividade. As teorias BCS, equa??es de London e modelo dos Dois Fluidos, s?o as teorias usadas nas aplica??es dos supercondutores, nas antenas e arranjos de antenas de microfita. Os arranjos de fase s?o analisados em configura??es lineares e planares. S?o obtidos os fatores de arranjos para estas configura??es, e os crit?rios da fase e do espa?amento entre os elementos que comp?em os arranjos, ao qual ser?o examinados, com o objetivo de minimizar as perdas no material, comparados com condutores normais. A antena com patch retangular, constitu?da de material supercondutor, com a temperatura cr?tica a 233K cuja f?rmula
qu?mica ? Tl5Ba4Ca2Cu9Oy , ? analisada atrav?s do m?todo din?mico da Linha de Transmiss?o Transversa (LTT), desenvolvido por H.C.C.Fernandes, no dom?nio da transformada de Fourier (FTD). O LTT ? um m?todo de onda completa, que tem como regra a obten??o dos campos eletromagn?ticos em termos das componentes transversais ? estrutura. A inclus?o do patch supercondutor ? feita utilizando-se a condi??o de
contorno complexa resistiva, usando-se a imped?ncia do supercondutor na fun??o Di?tica de Green, da estrutura. S?o obtidos resultados da freq??ncia de resson?ncia em fun??o dos par?metros da antena, utilizando material supercondutor; diagramas de radia??o no Plano-E e no Plano-H, para os arranjos de fase de antenas nas configura??es lineares e planares para diferentes valores de ?ngulos de fases e diferentes espa?amentos
entre os elementos
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15317 |
| Date | 11 June 2010 |
| Creators | Caetano, Leonardo Martins |
| Contributors | CPF:13097628487, http://lattes.cnpq.br/0246709532151067, Silva, Paulo Henrique da Fonseca, CPF:98196294700, http://lattes.cnpq.br/0656625630248917, Mendon?a, La?rcio Martins de, CPF:09064087415, http://lattes.cnpq.br/1853488415531363, Alves J?nior, Clodomiro, CPF:09621199468, http://lattes.cnpq.br/7441669258580942, Fernandes, Humberto C?sar Chaves |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia El?trica, UFRN, BR, Automa??o e Sistemas; Engenharia de Computa??o; Telecomunica??es |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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