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Träfflista för sökning "LAR1:lu ;pers:(Sjöberg Daniel);lar1:(lu)"

Search: LAR1:lu > Sjöberg Daniel > Lund University

  • Result 151-160 of 202
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151.
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152.
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153.
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154.
  • Sjöberg, Daniel, et al. (author)
  • Material characterization in partially filled waveguides using inverse scattering and multiple sample orientations
  • 2015
  • In: Radio Science. - 0048-6604. ; 50:6, s. 554-561
  • Journal article (peer-reviewed)abstract
    • Abstract in UndeterminedWe present a method aimed at reducing uncertainties and instabilities when characterizing materials in waveguide setups. The method is based on measuring the S parameters for three different orientations of a rectangular sample block in a rectangular waveguide. The corresponding geometries are modeled in a commercial full-wave simulation program, taking any material parameters as input. The material parameters of the sample are found by minimizing the squared distance between measured and calculated S parameters. The information added by the different sample orientations is quantified using the Cramer-Rao lower bound. The flexibility of the method allows the determination of material parameters of an arbitrarily shaped sample that fits in the waveguide.
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155.
  • Sjöberg, Daniel, et al. (author)
  • Material Characterization in Partially Filled Waveguides Using Inverse Scattering and Multiple Sample Orientations
  • 2013
  • In: [Host publication title missing]. - 2163-405X. ; , s. 942-945
  • Conference paper (peer-reviewed)abstract
    • We present a method aimed at reducing uncertainties and instabilities when characterizing materials in waveguide setups. The S-parameters for a rectangular waveguide loaded with a rectangular sample block are measured for three different sample orientations, and the corresponding geometries are modeled in a finite element program, taking any material parameters as input. The material parameters of the sample are found by minimizing the squared distance between measured and calculated S-parameters.
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156.
  • Sjöberg, Daniel (author)
  • Nonlinear electromagnetics
  • 2002
  • In: [Host publication title missing].
  • Conference paper (peer-reviewed)
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157.
  • Sjöberg, Daniel, et al. (author)
  • Nonlinear time-domain electromagnetics
  • 2002
  • In: Review of Radio Science, 1999-2002. - 9780471268666 ; , s. 127-143
  • Book chapter (other academic/artistic)abstract
    • Several physical phenomena cannot be described with a linear model. We present a couple of such phenomena related to electromagnetics, and give several examples of how they can be modeled mathematically. The emphasis is on different representations of the constitutive functional and the analysis of its combination with the time-domain Maxwell equations.
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158.
  • Sjöberg, Daniel (author)
  • Nonlinear waveguides
  • 2000
  • Reports (other academic/artistic)abstract
    • We investigate the propagation of electromagnetic waves in a waveguide filled with a nonlinear material. The electromagnetic field is expanded in the usual eigenmodes of the waveguide, and the coupling between the modes is quanti fied. We derive the wave equations governing each mode, with special emphasis on the situation with a dominant TE-mode. The result is a strictly hyperbolic system of nonlinear partial differential equations for the dominating mode, whereas the minor modes satisfy hyperbolic systems of linear, nonstationary, partial differential equations. A growth estimate is given for the minor modes.
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159.
  • Sjöberg, Daniel (author)
  • Nonlinear waveguides
  • 2003
  • In: Radio Science. - 0048-6604. ; 38:2
  • Journal article (peer-reviewed)abstract
    • We investigate the propagation of electromagnetic waves in a cylindrical waveguide with an arbitrary cross section filled with a nonlinear material. The electromagnetic field is expanded in the usual eigenmodes of the waveguide, and the coupling between the modes is quantified. We derive the wave equations governing each mode with special emphasis on the situation with a dominant TE mode. The result is a strictly hyperbolic system of nonlinear partial differential equations for the dominating mode, whereas the minor modes satisfy hyperbolic systems of linear, nonstationary, and partial differential equations. A growth estimate is given for the minor modes.
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160.
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  • Result 151-160 of 202
Type of publication
conference paper (102)
journal article (57)
reports (33)
book chapter (5)
book (2)
editorial proceedings (1)
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doctoral thesis (1)
licentiate thesis (1)
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Type of content
peer-reviewed (154)
other academic/artistic (48)
Author/Editor
Sjöberg, Daniel (201)Undo refine
Gustafsson, Mats (45)
Larsson, Christer (28)
Ericsson, Andreas (21)
Kristensson, Gerhard (20)
Bondarik, Alexander (11)
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Vakili, Iman (10)
Engström, Christian (9)
Helander, Jakob (9)
Nordebo, Sven (8)
Wernersson, Lars-Eri ... (7)
Ohlsson, Lars (7)
Wellander, Niklas (7)
Martin, Torleif (7)
Ramprecht, Jörgen (7)
Ioannidis, Andreas (6)
Lundgren, Johan (5)
Karlsson, Anders (4)
Balling, P (4)
Gerini, G (4)
Ying, Zhinong (4)
Ivanenko, Yevhen (4)
Nordebo, Sven, 1963- (4)
Bernland, Anders (4)
Sohl, Christian (4)
Zhao, Kun (4)
Dalarsson, Mariana (3)
Pontoppidan, K (3)
Vecchi, G (3)
Maci, S. (3)
Vipiana, F. (3)
He, Sailing (3)
Bayford, Richard (3)
Ärlelid, Mats (3)
Egard, Mikael (3)
Wall, David J N (3)
Bayer Keskin, Sena E ... (3)
Jonsson, B. Lars G. (2)
Sjöland, Henrik (2)
Gustafson, Carl (2)
Nilsson, Martin (2)
Nilsson, Börje (2)
Albani, M (2)
Sipus, Z. (2)
Bryllert, Tomas (2)
Xu, Bo (2)
Ehrenborg, Casimir (2)
Sten, Johan C-E (2)
Widenberg, Björn (2)
Elmkvist, Lisa (2)
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University
Lund University  (202)Undo refine
Royal Institute of Technology (16)
Linnaeus University (15)
Umeå University (6)
Örebro University (2)
Uppsala University (1)
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Linköping University (1)
Chalmers University of Technology (1)
Karolinska Institutet (1)
Blekinge Institute of Technology (1)
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Language
English (195)
Swedish (7)
Research subject (UKÄ/SCB)
Engineering and Technology (195)
Natural sciences (18)
Medical and Health Sciences (2)
Social Sciences (1)

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