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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

EMI studies in motor drives /

Hellany, Ali. January 1900 (has links)
Thesis (M.Eng)(Hons)--University of Western Sydney, Nepean, 1997. / Includes appendices. Includes bibliography.
62

Full-wave field interactions of nonuniform transmission lines : dissertation /

Haase, Heiko, January 1900 (has links)
Thesis (doctoral)--Otto-von-Guericke-Universität Magdeburg, 2005. / "Dissertation zur Erlangung des akademischen Grades Doktoringenieur (Dr.-Ing.)." "This thesis presents a new method to derive a generalized transmission-line theory, the Transmssion Line Supertheory (TLST)"--p. 13. Includes bibliographical references (p. 127-138).
63

Modern numerical electromagnetic techniques applied to aviation problems

Marmie, John A. January 1989 (has links)
Thesis (M.S.)--Ohio University, June, 1989. / Title from PDF t.p.
64

Impact of Bluetooth interference on the performance of IEEE 802.11b wireless LAN

Vaidya, Anirudha A. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains xi, 94 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 87-89).
65

An electromagnetic interference analysis of uninterruptible power supply systems in a data processing environment /

Beran, Edward W. January 2002 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2002. / Thesis advisor(s): Richard W. Adler, Wilbur R. Vincent. Includes bibliographical references (p. 103-104). Also available online.
66

Outside cell interference dynamics in cellular code division multiple access

Thakur, Anuja. January 2003 (has links)
Thesis (M.S.)--Ohio University, August, 2003. / Title from PDF t.p. Includes bibliographical references (leaves 70-71)
67

Detection of low cost radio frequency receivers based on their unintended electromagnetic emissions and an active stimulation

Seguin, Sarah Ann, January 2009 (has links) (PDF)
Thesis (Ph. D.)--Missouri University of Science and Technology, 2009. / Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 23, 2009) Includes bibliographical references.
68

Cable trays and EMC : modelling and measurement

Ebertsohn, Nolan Wade 12 1900 (has links)
Thesis (MScEng)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: Common mode currents are a major source of interference in electrical and electronic systems. A universal solution to counteract common mode interference is to introduce an electromagnetic shield with known characteristics. Cable trays are often used to shield cables from unwanted electromagnetic interference (EM!) and its shielding characteristics are defined in terms of its transfer impedance. This thesis pursues the modelling and measurement of the transfer impedance and mutual inductance of non-magnetic cable trays. Theoretical analysis is firstly employed by means of Maxwell's equations after which method of moments (MoM) simulations are performed in order to determine the transfer impedance and mutual inductance within the interior region of a cable tray. The results obtained through simulation are then validated with measurements conducted with an automatic network analyser (ANA). The computational and measured data are in good agreement and the developed model can be used to predict the transfer impedance in the cross-section of non-magnetic cable trays. / AFRIKAANSE OPSOMMING: Gemenernodus strome is 'n bron van interferensie in elektriese en elektroniese stelsels. 'n Universele oplossing om hierdie gemenernodus interferensie teen werk is om 'n elektromagnetiese skerm met bekende eienskappe te implementeer. Geleier leikanale word dikwels gebruik om kabels teen elektromagnetiese interferensie te beskerm en die afskermings eienskappe word in terme van die kanaal se oordragsimpedansie gedefinieer. Hierdie tesis ondersoek die modelering en meting van die wedersydse induktansie en oordragsimpedansie van nie-magnetiese geleier leikanale. 'n Teoretiese analise word eers uitgevoer deur middel van Maxwell se vergelykings waarna metode van momente (MvM) simulasies uitgevoer word om die oordragsimpedansie en wedersydse induktansie in die interne gebied van 'n leikanaal te bepaal. Die resultate verkry deur simulasie word dan bevestig deur meting wat uitgevoer word met behulp van 'n automatiese netwerk analiseerder (ANA). Die numeriese en gemete data stem goed ooreen en die ontwikkelde model kan deurgaans gebruik word om die oordragsimpedansie in die deursnit area van nie-magnetiese geleier leikanale te voorspel.
69

Análise de interferência eletromagnética entre condutores com a utilização do simulador Spice. / Analysis of crosstalk among conductors using software Spice.

William Gerlach Dietz 04 May 2007 (has links)
O fenômeno \"crosstalk\" constitui-se de acoplamentos eletromagnéticos não intencionais entre condutores. Motivado pela importância deste fenômeno para a área de Compatibilidade Eletromagnética, este trabalho apresenta uma metodologia de análise do fenômeno através do aplicativo SPICE considerando-se configurações compostas por condutores múltiplos. A proposta de desenvolvimento de uma ferramenta computacional de simulação do fenômeno utilizando uma versão estudantil, com livre acesso, possibilita, entre outras coisas, a disseminação de um modelo alternativo, simples e eficaz, e a inclusão do estudo do \"crosstalk\" no conteúdo programático de cursos de Graduação ou Pós-graduação. Para este fim, adotou-se um modelo de simulação de acoplamento eletromagnético com base em modelos de linha de transmissão. Tal modelo é complementado com geradores vinculados controlados por tensão e corrente, que representam fontes de interferência eletromagnética. Em face de limitações dos blocos funcionais que representam essas fontes no aplicativo, foi utilizado em um primeiro instante um método de representação do modelo através de arquivos-texto, ao invés da utilização da interface gráfica existente no software. Posteriormente, novos blocos foram desenvolvidos e acrescentados à biblioteca, tornando possível à aplicação dessa interface diretamente nas simulações. A validação do modelo foi feita, inicialmente, comparando-se os resultados simulados àqueles disponíveis na literatura internacional. Além disto, foi desenvolvida uma bancada experimental para comprovação dos resultados e validação do modelo implementado no aplicativo SPICE através de casos simples do fenômeno. Esses resultados mostram a viabilidade da utilização dos componentes desenvolvidos para o aplicativo, tornando possível e confiável o uso dessa ferramenta na simulação do fenômeno \"crosstalk\". Passou-se então a aplicação da ferramenta desenvolvida a sistemas mais complexos com um número superior de condutores. / This work presents an approach, in which the well-known SPICE simulator is used as a tool to simulate the phenomenon crosstalk. Basically, it is based on transmission line model, where the electromagnetic interferences are simulated by controlled voltage and current sources. Due to the limitations of the available Spice models concerning multiconductors configurations, additional models were developed and implemented as part of the SPICE library. Theoretical and experimental results were obtained. They were used as part of the validation process of the proposed methodology. The developing of specific models allowed the use of this modeling in SPICE student versions. This turns possible the introduction of crosstalk simulations in undergraduate and graduate courses. Besides, the methodology was applied to complex systems in order to present its versatility.
70

Projeto e implementação de câmara GTEM - giga hertz transverse electromagnetic para testes de compatibilidade eletromagnética de circuitos e sistemas eletrônicos / Design and implementation of a GTEM chamber for electromagnetic compatibility tests of electronic circuits and systems

Araujo, Humberto Xavier de 19 August 2018 (has links)
Orientador: Luiz Carlos Kretly / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-19T12:48:04Z (GMT). No. of bitstreams: 1 Araujo_HumbertoXavierde_D.pdf: 7050651 bytes, checksum: 1d22c38822d1b7ff3ee74974b2d874b9 (MD5) Previous issue date: 2012 / Resumo: Este trabalho apresenta a análise detalhada, simulações numéricas completas e os procedimentos para o projeto e a implementação de uma câmara GTEM -GigaHertz Transverse Electromagnetic- para análise de pré-conformidade em circuitos e sistemas eletrônicos. O sistema construído é capaz de realizar testes de EMC - Electromagnetic Compatibility, tanto de interferência - EMI quanto de susceptibilidade - EMS, na faixa de freqüência de 500 MHz - 18 GHz. O projeto apresenta uma inovação ao introduzir estruturas metamateriais na câmara tornando-a mais flexível na determinação da freqüência e níveis de RF e Microondas de teste. Os detalhes do projeto, simulações, a tecnologia de fabricação e medidas de validação da GTEM são descritos neste trabalho / Abstract: In this work it is shown a detailed analysis, complete numerical simulations and the guidelines for the design and fabrication of a GTEM - GigaHertz Transverse Electromagnetic chamber, for pre-compliance tests of integrated circuits and electronic boards. With the built structure electromagnetic tests - EMC, including electromagnetic interference - EMI and immunity becomes feasible, on 500 MHz - 18 GHz frequency range. Besides that, an innovative concept is shown with the use of metamaterial technology applied to the GTEM chamber in order to make it more flexible in terms of frequency range. The design, simulation and fabrication strategy are clearly described along throughout this work / Doutorado / Eletrônica, Microeletrônica e Optoeletrônica / Doutor em Engenharia Elétrica

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