Title :
A Warning About Metamaterials for Users of Frequency-Domain Numerical Simulators
Author :
Oliveri, Giacomo ; Raffetto, Mirco
Author_Institution :
Univ. of Genoa, Genoa
fDate :
3/1/2008 12:00:00 AM
Abstract :
It is shown that users of frequency-domain numerical simulators should be warned of the danger of using models with adjacent complementary media since such a configuration of materials can be a cause of a numerical instability which cannot be overcome by the presence of other lossy media or absorbing boundary conditions. The physical realizability at any frequency of models considering complementary media with sharp interfaces is then questioned by the contradiction between the deduced result and the one which holds true when the actual dielectric structure of metamaterials is considered.
Keywords :
metamaterials; numerical analysis; complementary media; frequency-domain numerical simulators; metamaterials; numerical instability; Boundary conditions; Computational modeling; Convergence of numerical methods; Dielectric losses; Electromagnetic waveguides; Finite element methods; Frequency domain analysis; Metamaterials; Numerical simulation; Numerical stability; Boundary value problems; convergence of numerical methods; finite element methods; frequency domain analysis; metamaterials; numerical stability; waveguide discontinuity problems;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.916955