https://www.nokia.com/bell-labs/publications-and-media/publications/scattering-losses-in-a-large-luneberg-lens-due-to-random-dielectric-inhomogeneities/
Scattering Losses in a Large Luneberg Lens Due to Random Dielectric Inhomogeneities | Nokia.com
In recent years, large Luneberg lenses have been used as antennas for long-range radars.1 Such lenses have been built of cubical blocks of very low density...