Note that the real part of the complex wave number has to be negative for DNG slab which is a common information known in the literature .
In the first case, the DNG slabs are selected to be identical to each other with the fixed permittivity and permeability as: [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], respectively.
As a second investigation, the permeability of the identical DNG slabs are varied when the permittivity of them is selected as [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
In third example, the same configuration is considered expect the constitutive parameters of DNG slabs.
As a first configuration, the permittivity of DPS slab is varied for different loss ratios for two fixed DNG slabs.
In the following example, the permittivity of DNG slabs is varied when the constitutive parameters of DPS slab and the permeability of DNG slabs ([MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]) are fixed in the presence of the loss.
To establish an accurate and physically realizable system, a multilayer structure with dispersive slabs as DNG media are analyzed by using the Drude and Lorenz parameters.