Journal
IEEE ANTENNAS AND PROPAGATION MAGAZINE
Volume 49, Issue 1, Pages 37-43Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MAP.2007.370980
Keywords
metamaterials; non-homogeneous media; artificial materials; equivalent circuits; stability; permittivity; permeability
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Basic physical limitations on the material constitutive parameters of artificial passive materials with negative real parts of the effective parameters are reviewed. It is shown that field solutions in hypothetical materials with negative and nondispersive parameters are unstable. The energy density and field solutions in active metamaterials with nondispersive negative parameters are also considered.
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