Optimal element distributions and their associated beam pattern profiles for N_ant = 5 and N_ant = 22 with the two element beam patterns f_iso and f_dip (from a to d). Left column: element positions in wavelength units. The black dots and the circles represent the element positions and the footprints of their effective area accounting for the minimal distance, respectively (Appendix A). Right column: Normalised power patterns. The red line is the beam profile where the maximum SLL has been located. The blue line is the profile where the maximum SLL is located on the optimal solution. The grey lines are the superimposed pattern azimuthal profiles sampled with 20° steps. The vertical dashed line locates the θ_{1s null, min} (Eq. (4)) and the horizontal dashed line marks the SLL.