Multiple slot array with near zero refractive index substrate

Near zero refractive index based materials have been useful for building antennas with high directivity at the broad side direction. We demonstrate a directive multi slot antenna structure with a near zero refractive index substrate that is capable of directing the main lobe of the radiation pattern away from the broad side. The tilt of the main lobe is a function of the position of the source excitation, within the substrate, with respect to the two slot apertures.