• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 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.
1

Antena de grafeno composta de dipolo-espira para aumento da largura de banda

AZEVEDO, Rodrigo Guimarães de 17 February 2017 (has links)
Submitted by Nathalya Silva (nathyjf033@gmail.com) on 2017-06-28T18:58:53Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AntenaGrafenoComposta.pdf: 4555414 bytes, checksum: 147ba9fe429be0b537311893a53e2bb9 (MD5) / Approved for entry into archive by Irvana Coutinho (irvana@ufpa.br) on 2017-08-17T12:53:04Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AntenaGrafenoComposta.pdf: 4555414 bytes, checksum: 147ba9fe429be0b537311893a53e2bb9 (MD5) / Made available in DSpace on 2017-08-17T12:53:04Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AntenaGrafenoComposta.pdf: 4555414 bytes, checksum: 147ba9fe429be0b537311893a53e2bb9 (MD5) Previous issue date: 2017-02-17 / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / Neste trabalho é apresentada uma antena de grafeno composta por um dipolo planar e uma espira circular para aumento da largura de banda na faixa do terahertz. O dipolo é alimentado por uma fonte de tensão no seu gap e a espira circular é uma antena parasita sem alimentação via conexão física com o dipolo. É utilizado o método dos momentos bidimensional (MoM-2D) com impedância superficial para análise numérica dessa antena composta. São investigadas a influência da geometria e do potencial químico da antena parasita sobre a impedância de entrada e a largura de banda, com o objetivo de se obter operação em banda larga. / This work presents a graphene antenna composed by a planar dipole and a circular loop for increasing bandwidth in the terahertz range. The dipole is fed by a voltage source in its gap and the circular loop is a parasitic antenna without physical connection with dipole. The two-dimensional method of moments (MoM-2D) with surface impedance is used for numerical analysis of this antenna compound antenna. It is investigated the influence of geometry and the chemical potential of loop element on the input impedance and bandwidth of the dipole element, with objective to obtain broadband operation.

Page generated in 0.0644 seconds