608393.fig.007a
(a) 12 GHz
608393.fig.007b
(b) 15 GHz
608393.fig.007c
(c) 18 GHz
608393.fig.007d
(d) 12 GHz
608393.fig.007e
(e) 15 GHz
608393.fig.007f
(f) 18 GHz
Figure 7: Simulated (a)–(c) and measured (d)–(f) radiation patterns of the proposed antenna at 12, 15, and 18 GHz, respectively.