Figure 7.

Sector scanning results: (a) N = 5, d = 0.5·$\mathsf{\lambda }$; (b) directivity of diagram (a); (c) N = 5, d = 1.5·$\mathsf{\lambda }$; (d) directivity of diagram (c); (e) N = 13, d = 0.5·$\mathsf{\lambda }$; (f) directivity of diagram (e); (g) N = 16, d = 0.5·$\mathsf{\lambda }$; (h) directivity of diagram (g).