Antenna arrays with large interelement spacing are marginally used in practical applications despite their highly directive main lobe. Their disuse is primarily attributed to the onset of grating lobes even for low scanning angles. In this contribution, we propose the design of a gradient metasurface dome able to reduce the grating lobe amplitude of a dual-polarized phased array. The dome consists of an array of Huygens unit-cells exhibiting an extremely low insertion loss and a properly designed phase of the transmission coefficient. The proposed solution is based on the scanning range shifting approach, which exploits the lower grating lobe levels exhibited by the array when radiating towards directions close to the broadside. A proper set of numerical simulations have been performed considering a 1×4 phased linear antenna array covered by a properly designed metasurface dome, showing its capability to significantly reduce the grating lobe amplitude without significantly reducing the performances in the pointing direction.
Monti, A., Barbuto, M., Ramaccia, D., Marini, A.V., Vellucci, S., Toscano, A., et al. (2021). Gradient metasurface dome for phased arrays able reducing the grating lobes within single-side scanning region. In 2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021 - Proceedings (pp.729-730). Institute of Electrical and Electronics Engineers Inc. [10.1109/APS/URSI47566.2021.9704189].
Gradient metasurface dome for phased arrays able reducing the grating lobes within single-side scanning region
Monti A.;Ramaccia D.;Marini A. V.;Vellucci S.;Toscano A.;Bilotti F.
2021-01-01
Abstract
Antenna arrays with large interelement spacing are marginally used in practical applications despite their highly directive main lobe. Their disuse is primarily attributed to the onset of grating lobes even for low scanning angles. In this contribution, we propose the design of a gradient metasurface dome able to reduce the grating lobe amplitude of a dual-polarized phased array. The dome consists of an array of Huygens unit-cells exhibiting an extremely low insertion loss and a properly designed phase of the transmission coefficient. The proposed solution is based on the scanning range shifting approach, which exploits the lower grating lobe levels exhibited by the array when radiating towards directions close to the broadside. A proper set of numerical simulations have been performed considering a 1×4 phased linear antenna array covered by a properly designed metasurface dome, showing its capability to significantly reduce the grating lobe amplitude without significantly reducing the performances in the pointing direction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
