Research Article

Wideband Circularly Polarized SIW Antenna Array That Uses Sequential Rotation Feeding

Figure 2

Impedance matching characteristics according to the variation of (a) , (b) , (c) , and (d) .
534539.fig.002a
(a)
534539.fig.002b
(b)
534539.fig.002c
(c)
534539.fig.002d
(d)