209741.fig.002a
(a)
209741.fig.002b
(b)
209741.fig.002c
(c)
209741.fig.002d
(d)
Figure 2: (a) Dielectric EBG structure, (b) circular waveguide antenna with EBG superstrate, (c) radiation patterns of -plane with different EBG cells, (d) radiation patterns of -plane with different EBG cells.