Monti et al. prove that metallic metasurfaces can serve as efficient near-field cloaks that reduce mutual blockage of electrically close antennas. The approach is described as originating from "mantle cloaking" concept (A. Alu, PRB 80, 2009). Cloaking with ultrathin, nearly lossless layers is an attractive idea both for near- and far-field applications.
IEEE Antennas and Wireless Prop. Lett. vol. 11, p. 1414, 2012