Large-element-spacing　(LES)　arrays　provide　cost-effectiveness　and　structural　simplicity.　However,　they　experience　the　drawback　of　excessive　grating　lobes.　In　this　study,　we　tackle　the　problem　by　introducing　a　metasurface　lens　positioned　above　a　non-uniform　LES　array.　The　purpose　is　to　manipulate　and　correct　the　phase　characteristics　of　the　near　fields　produced　by　the　array;　in　doing　so,　the　grating　lobes　are　reduced　or　eliminated.　Theoretical　analysis　and　simulations　of　an　example　design　are　conducted.　The　results　show　that　this　approach　can　not　only　mitigate　the　grating　lobes　from　the　non-uniform　LES　array　but　also　increase　the　antenna　gain　and　aperture　efficiency.　　©　2023　IEEE.