Focusing Microwaves in the Fresnel Zone With a Cavity-Backed Holographic Metasurface Gowda, Vinay R. ; Imani, Mohammadreza F. ; Sleasman, Timothy ; Yurduseven, Okan ; Smith, David R. Abstract Publication: IEEE Access Pub Date: 2018 DOI: 10.1109/ACCESS.2018.2802379 Bibcode: 2018IEEEA...612815G