The spatial anisotropy of the wire metamaterials in the millimeter waveband

The paper is devoted to the experimental study of the spectral characteristics of matrix anisotropic structures formed by different type of metamaterial. During the analysis of the spectrum of the structures under investigation the manifestation of spatial anisotropy for different orientations of the wave vector k in the structure has been discovered. This phenomenon is explained by changes of the geometric parameters of metallic inclusions in these structures. Thus increasing the length of the metal inclusions leads to an increase of spatial anisotropy for the both selected different orientations of the wave vector k.