Fig. 2

(a) S₁₁ vs frequency antenna without slots and with slots, (b) S-parameter of unit cell, (c) array of unit cells, a = 50, b = 50, g = 3, \({l}_{u}\) = 10.3, \({w}_{u}\)= 10.3 and \({g}_{u}\) = 0.7 (units: mm).