Now showing items 1-6 of 6

    • Accurate modeling of metamaterials with MLFMA 

      Ergül, Özgür; Ünal, Alper; Gürel, Levent (ESA Publications, 2006)
      Electromagnetic modelling of large metamaterial (MM) structures employing multilevel fast multipole algorithm (MLFMA) is reported. MMs are usually constructed by periodically embedding unit cells, such as split-ring ...
    • Computational analysis of complicated metamaterial structures using MLFMA and nested preconditioners 

      Ergül, Özgür; Malas, Tahir; Yavuz, Ç; Ünal, Alper; Gürel, Levent (IEEE, 2007-11)
      We consider accurate solution of scattering problems involving complicated metamaterial (MM) structures consisting of thin wires and split-ring resonators. The scattering problems are formulated by the electric-field ...
    • Electromagnetic modeling of split-ring resonators 

      Gürel, Levent; Ünal, Alper; Ergül, Özgür (IEEE, 2007)
      In this paper, we report our efforts to model splitring resonators (SRRs) and their large arrays accurately and efficiently in a sophisticated simulation environment based on recent advances in the computational electromagnetics. ...
    • Investigation of various metamaterial structures using multilevel fast multipole algorithm 

      Ergül, Özgür; Yavuz, Çağlar; Ünal, Alper; Gürel, Levent (IEEE, 2007)
      We consider accurate simulations of metamaterial (MM) structures consisting of split- ring-resonators (SRRs) and thin wires (TWs). We employ electric-field integral equation (EFIE) to formulate the scattering problems ...
    • MLFMA solutions of transmission problems Involving realistic metamaterial walls 

      Ergül, Özgür; Ünal, Alper; Gürel, Levent (IEEE, 2007-08)
      We present the solution of multilayer metamaterial (MM) structures containing large numbers of unit cells, such as split-ring resonators. Integral-equation formulations of scattering problems are solved iteratively by ...
    • Solutions of large integral-equation problems with preconditioned MLFMA 

      Ergül, Özgür; Malas, Tahir; Ünal, Alper; Gürel, Levent (IEEE, 2007)
      We report the solution of the largest integral-equation problems in computational electromagnetics. We consider matrix equations obtained from the discretization of the integral-equation formulations that are solved ...