Large-element-spacing　(LES)　antenna　arrays　present　an　attractive　proposition　with　their　cost-effectiveness　and　simplified　structures.　However,　they　often　encounter　the　challenge　of　high-level　grating　lobes.　This　paper　proposes　a　novel　meta-lens　methodology　to　effectively　address　the　grating　lobe　issue　in　fixed-beam　LES　arrays.　The　proposed　approach　involves　strategically　positioning　a　meta-lens　above　the　LES　arrays　at　a　suitable　vertical　distance.　This　setup　enables　precise　manipulation　and　compensation　of　the　near-field　phase,　resulting　in　the　suppression　or　elimination　of　grating　lobes　without　introducing　additional　design　complexity.　Comprehensive　theoretical　analyses,　meticulous　design　calculations　employing　efficient　numerical　methods,　rigorous　field　simulations,　and　practical　experiments　are　conducted.　The　results　demonstrate　that　our　meta-lens　solution　achieves　significant　grating-lobe　suppressions　and　substantial　gain　enhancements　with　only　a　marginal　increase　in　system　profile　or　volume.　The　proposed　meta-lens　approach　is　versatile　and　applicable　to　various　LES　antenna　arrays,　including　sparse/thinned　arrays,　regardless　of　their　size,　element　spacing,　and　configuration　(uniform　or　non-uniform,　periodic　or　aperiodic).　Copyright　©　2024　The　Author(s).