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Previous issue date: 2006-02-16 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work presents an analysis of the annular ring microstrip antennas printed on uniaxial anisotropic substrates and with superstrate.The analysis uses the full-wave formulation by means of the Hertz vector potentials method, in the Hankel transform domain. The definition of the Hertz vector potentials and the application of the appropriate boundary conditions to the structure allow determining the dyadic Green functions, relating the current densities in the conducting patch to the transforms of the tangential electric field components. Galerkin s method is then used to obtain the matrix equation whose nontrivial solution gives the complex resonant frequency of the antenna. From the modeling, it is possible to obtain results for the resonant frequency, bandwidth and quality factor, as a function of several parameters of the antenna, for different configurations. We have considered annular ring microstrip antennas on a single dielectric layer, antennas with two anisotropic dielectric layers, and annular ring microstrip antennas on suspended substrates. Numerical results for the resonant frequency of the these structures printed on isotropic substrates are also presented and compared with those published by other authors, showing a good agreement / Este trabalho apresenta uma an?lise de antenas de microfita com patch em anel sobre substratos diel?tricos anisotr?picos uniaxiais e com sobrecamada. A an?lise utiliza o formalismo de onda completa atrav?s da aplica??o do m?todo dos potenciais vetoriais de Hertz, no dom?nio da transformada de Hankel. A defini??o dos potenciais vetoriais de Hertz e a imposi??o das condi??es de contorno adequadas ? estrutura permitem determinar as fun??es di?dicas de Green, relacionando as componentes da densidade de corrente no patch com as componentes tangenciais do campo el?trico. O M?todo de Galerkin ? ent?o usado para obter a equa??o matricial, cuja solu??o n?o trivial fornece a freq??ncia de resson?ncia da antena. A partir da modelagem, ? poss?vel obter resultados para a freq??ncia de resson?ncia em fun??o de v?rios par?metros da antena de microfita com patch em anel, para diferentes configura??es, al?m do fator de qualidade e da largura de banda. S?o consideradas estruturas de antenas de microfita com patch em anel sobre uma camada diel?trica, antenas com duas camadas diel?tricas anisotr?picas e antenas de microfita com patch em anel sobre substratos suspensos. Resultados num?ricos para a freq??ncia de resson?ncia dessas estruturas impressas sobre substratos diel?tricos isotr?picos s?o tamb?m apresentados e comparados com resultados de outros autores, mostrando uma boa concord?ncia
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15396 |
| Date | 16 February 2006 |
| Creators | Vasconcelos, Cristhianne de F?tima Linhares de |
| Contributors | CPF:70399727434, http://lattes.cnpq.br/6122570451445215, Silva, Jefferson Costa e, CPF:60137495404, http://lattes.cnpq.br/7399512856151138, D'assun??o, Adaildo Gomes, CPF:04401565487, Albuquerque, Maria Rosa Medeiros Lins de, Silva, Sandro Gon?alves da |
| 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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