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Low-cost Dielectric Flat Lens for Near-Field Focusing

Vaquero, Álvaro F. Vaquero ; Arrebola, Manuel Arrebola ; Pino , Marcos R. Pino ; Matos, S.A. ; Costa, J.R. ; Fernandes, C. A.

Low-cost Dielectric Flat Lens for Near-Field Focusing, Proc IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Boston, United States, Vol. -, pp. - - -, July, 2018.

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Abstract
This paper presents a NF-focused antenna based on a low-cost dielectric planar lens. The working principle is based on the variation of dielectric material density in order to obtain a variation in the effective ε_r. A prototype in the 28GHz band is designed and manufactured with a 3D printer using Polylactic Acid (PLA) material. The breadboard is simulated with a full wave tool and measured in an XYZ planar range, resulting in a very good agreement between simulations and measurements.