LASER RAPID PROTOTYPING OF 3-D ALUMINA PHOTONIC BANDGAP STRUCTURES. APPLICATION TO THE DESIGN OF DIRECTIVE ANTENNAS

摘要

We saw how to design 3-D structure with rapid prototyping. This new manufacturing technology opens a large investigation field for the PBG ceramical structures. New geometries can be now studied and measured and also new materials will be manufactured in the same way. In the future, Zircon will be used to realize our 3-D PBG structures with a dielectric constant of 30. This will be excellent to obtain complete bandgap and high gain antennas. We notice that the uses of 3-D PBG structures in the antenna domain is interesting because it reduces the mass of the system, increases the efficiency and is simple to manufacture with rapid prototyping technology. What's more, 3-D structures present the advantage to reduce the amount of material so to reduce the losses compared to a 1-D or 2-D PBG structure.