Applications of metamaterials in the GHz frequency domain

This paper describes the applications of metamaterials to lenses with a negative index of refraction. A negative index of refraction, n, allows lenses with reduced primary (Seidel) aberrations then the ones with an equivalent positive index lens. This is demonstrated both for cylindrical lenses and spherical lenses, as well as for the gradient index lenses. Detailed maps of the focal region of the metamaterials lenses are made and compared to a comparable positive index of refraction lens.