An ultra-wideband linear polarization converting metasurface is presented. The polarizer is based on a periodic arrangement of metallic elements printed on a grounded dielectric substrate. The element geometry of the metasurface is optimized with a genetic algorithm by discretizing the unit cell in a 16×16 pixel matrix. This polarization converter is able to work from 7.03 GHz to 29.01 GHz (121% of bandwidth) with a cross polar reflection coefficient greater than -2 dB. A refinement algorithm is also applied to the optimized cell in order to further extend the operative bandwidth and at the same time remove unnecessary pixels. Finally, the bandwidth is extended up to 129%. The unit cell periodicity is 4.6mm and the thickness of the low loss substrate is 3mm.
Ultra-wideband linear polarization converters based on pixelated reflecting metasurfaces
Michele Borgese;COSTA FILIPPO;Simone Genovesi;Agostino Monorchio
2017-01-01
Abstract
An ultra-wideband linear polarization converting metasurface is presented. The polarizer is based on a periodic arrangement of metallic elements printed on a grounded dielectric substrate. The element geometry of the metasurface is optimized with a genetic algorithm by discretizing the unit cell in a 16×16 pixel matrix. This polarization converter is able to work from 7.03 GHz to 29.01 GHz (121% of bandwidth) with a cross polar reflection coefficient greater than -2 dB. A refinement algorithm is also applied to the optimized cell in order to further extend the operative bandwidth and at the same time remove unnecessary pixels. Finally, the bandwidth is extended up to 129%. The unit cell periodicity is 4.6mm and the thickness of the low loss substrate is 3mm.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
