Design and engineering of metasurfaces for high-directivity antenna and sensing applicationsBadreddine Ratni, Elena Bochkova, Gérard-Pascal Piau, André de Lustrac, Anatole Lupu and Shah Nawaz BurokurEPJ Applied Metamaterials, 3 (2016) 4DOI: https://doi.org/10.1051/epjam/2016008