A month prior to this demonstration, the results of an experiment to spatially map the internal and external electromagnetic fields of negative refractive metamaterial was published in September 2006. This was innovative because prior to this the microwave fields were measured only externally. In this September experiment the permittivity and permeability of the microstructures (instead of external macrostructure) of the metamaterial samples were measured, as well as the scattering by the two-dimensional negative index metamaterials. This gave an average effective refractive index, which results in assuming homogeneous metamaterial.