Metasurface Dome for Above-the-Horizon Grating Lobes Reduction in 5G-NR Systems

The use of fifth-generation (5G) new radio (NR) spectrum around 26 GHz is currently raising the quest on its compatibility with well-established Earth exploration-satellite service, which may be blinded by spurious radiation emitted above horizon (AtH) base station (BS) antennas. Indeed, AtH grating lobes are often present during cell scanning due to large interelement spacing in BS array antennas for achieving higher gains a reduced number RF chains. In this letter, we propose an approach based electrically thin metasurface-based dome reduction 5G-NR proposed scanning range shifting approach exploits natural lower amplitude when antenna scans angular region closer broadside direction. lobe here demonstrated considering 1×4 phased linear operating under dual-liner ±45°-slant polarization. A simple design procedure designing metasurface reported, together performances, evaluated through proper set numerical experiments. It shown that toward satellite significantly reduced, whereas overall insertion loss moderate.