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Previous issue date: 2012-05-07 / This work shows a theoretical analysis together with numerical and experimental
results of transmission characteristics from the microstrip bandpass filters with different
geometries. These filters are built over isotropic dielectric substrates. The numerical
analysis is made by specifical commercial softwares, like Ansoft Designer and Agilent
Advanced Design System (ADS). In addition to these tools, a Matlab Script was built to
analyze the filters through the Finite-Difference Time-Domain (FDTD) method.
The filters project focused the development of the first stage of filtering in the
ITASAT s Transponder receptor, and its integration with the others systems. Some
microstrip filters architectures have been studied, aiming the viability of implementation
and suitable practical application for the purposes of the ITASAT Project due to its lowspace
occupation in the lower UHF frequencies. The ITASAT project is a Universityexperimental
project which will build a satellite to integrate the Brazilian Data Collect
System s satellite constellation, with efforts of many Brazilian institutes, like for
example AEB (Brazilian Spatial Agency), ITA (Technological Institute of Aeronautics),
INPE/CRN (National Institute of Spatial Researches/Northeastern Regional Center) and
UFRN (Federal University of Rio Grande do Norte).
Comparisons were made between numerical and experimental results of all
filters, where good agreements could be noticed, reaching the most of the objectives.
Also, post-work improvements were suggested. / Esse trabalho apresenta uma an?lise te?rica e resultados num?ricos e
experimentais das caracter?sticas de transmiss?o de filtros passa-faixa de microfita, que
usam diferentes geometrias. Os filtros s?o constru?dos sobre substratos diel?tricos
isotr?picos. A an?lise ? efetuada utilizando-se diferentes programas computacionais
comerciais como o Ansoft Designer e o Advanced Design System (ADS). Al?m dessas
ferramentas, foram desenvolvidas rotinas computacionais que analisam os filtros atrav?s
do m?todo das diferen?as finitas no dom?nio do tempo (FDTD).
O projeto dos filtros teve foco no desenvolvimento do primeiro est?gio de
filtragem do sistema de recep??o do Transponder do Sat?lite ITASAT e sua integra??o
com os demais sistemas. Foram estudadas algumas arquiteturas de filtro passa-faixa de
microfita para viabilizar sua aplica??o no Transponder, por sua economia de espa?o na
frequ?ncia de opera??o (faixa UHF inferior). O ITASAT ? um projeto que visa a
constru??o de um sat?lite de car?ter experimental universit?rio para integrar a
constela??o de sat?lites do Sistema Brasileiro de Coleta de Dados, reunindo esfor?os de
diversas institui??es do Brasil, incluindo a AEB, o ITA, o INPE/CRN e a UFRN.
Foram efetuadas compara??es entre os resultados num?ricos e experimentais
para todos os filtros, onde observou-se uma boa concord?ncia, atingindo boa parte dos
objetivos. Sugest?es de continuidade do trabalho s?o apresentadas.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15402 |
| Date | 07 May 2012 |
| Creators | Ara?jo, Tiago Costa de |
| Contributors | CPF:79090095420, http://lattes.cnpq.br/1982228057731254, Silveira, Luiz Felipe de Queiroz, CPF:02863206494, http://lattes.cnpq.br/4139452169580807, Martins, Ronaldo de Andrade, CPF:05644097404, http://lattes.cnpq.br/0978273656336966, Silva, Jefferson Costa e, CPF:60137495404, http://lattes.cnpq.br/7399512856151138, Campos, Ant?nio Luiz Pereira de Siqueira |
| 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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