Design and verification of the HMM Airy beam generator. (a) Airy beam profile: red line for the field envelop of Airy beam extracted by Eq. (6) and blue dots for sampling points. (b) W_l and θ as a function of the serial number of the RHMM unit. (c) A part of the fabricated sample. (d), (e) The electric field intensity distributions of the transmitted RCP waves obtained by FDTD simulation (d), and by near-field scanning experiment (e) at 8.6 GHz.