Different methods based on Electromagnetic Band-Gap materials are used to enhance the directivity of dipoles with a back reflector and compared. The EBG media consist of a periodic arrangement of dielectric cylinders that are excited either inside or at the edge of the band-gap by a half-wavelength dipole, while a ground plane with finite size acts as reflector against backscattering. The strengths and weaknesses of the two methods are assessed considering both square and triangular lattices.
Ceccuzzi, S., Ponti, C., Schettini, G. (2015). Gain enhancement of dipolar antennas employing EBG media. In Proceedings Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2015 9th International Congress on [10.1109/MetaMaterials.2015.7342518].