Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications

Figure 3

Scanning performances of an N-elements linear array with spacing equal to 0.5𝜆: (a) allowable scanning area given by relation (1); (b) array factor for a scan angle 𝜃_𝑠=15^∘ and 𝑁=21; (c) array factor for a scan angle 𝜃_𝑠=30^∘ and 𝑁=21; (d) array factor for a scan angle 𝜃_𝑠=50^∘ and 𝑁=21.

(a)

(b)

(c)

(d)