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Sökning: L773:9781424443833

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1.
  • Crupi, G., et al. (författare)
  • Combined empirical and look-up table approach for non-quasi-static modelling of GaN HEMTs
  • 2009
  • Ingår i: 9th International Conference on Telecommunications in Modern Satellite, Cable, and Broadcasting Services, TELSIKS 2009 - Proceedings of Paper. - 9781424443833 ; , s. 40-43
  • Konferensbidrag (refereegranskat)abstract
    • In this paper the empirical and the look-up table approaches are combined to accurately model a gallium nitride based HEMT on silicon carbide. That solution allows to exploit the advantages of both approaches. The validity of the extracted model is verified by comparing model simulations with DC and microwave measurements.
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2.
  • Tassin, P., et al. (författare)
  • Exact analytical treatment of the graded interfaces between positive and negative refractive index media
  • 2009
  • Ingår i: 9th International Conference on Telecommunications in Modern Satellite, Cable, and Broadcasting Services, TELSIKS 2009 - Proceedings of Paper. - : IEEE. - 9781424443833 ; , s. 143-146
  • Konferensbidrag (refereegranskat)abstract
    • We investigated electrodynamics of structures incorporating composites with negative dielectric permittivity and magnetic permeability, the popular "left-handed metamaterials". We obtained the exact analytical solutions to the Helmholtz equation for gradient-index interfaces between the positive and negative index part in the special case of matched impedances of the two materials. We derived expressions for the field intensity and compared the analytical results with the corresponding results obtained by the numerical simulations using the Finite Element Method (FEM). The model allows for arbitrary spectral dispersion and lossy media.
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