To improve the bandwidth of WAIM structures, multi-layered MTM37,38 structures and dielectrics39 have been used. Unfortunately, the overall volume and weight of the array is also increased. To enable wide angle scanning without increasing the volume and weight of antenna arrays, MSs have been employed. The anisotropic MS-WAIM (henceforth referred to as MS only for brevity) in ref.31 provided an improved match for an array of open-ended circular waveguides to free space over several angles. However, only the scanning results for the H-plane were presented; the associated E-plane and D-plane (diagonal plane of a radiating aperture) results were not reported. Moreover, wide angle scanning over a narrow bandwidth was the focus of the design, which was achieved over a 3.3% bandwidth. The works reported in ref.34 and ref.31 were extended in ref.32. The dielectric slab was replaced with an ultra-thin metasurface composed of subwavelength split-ring resonators (SRRs) for an improved scan in the H and D-planes. Simulation results showed that wide angle scanning was achieved over a 20% impedance bandwidth.