International Journal of Antennas and Propagation

Research Article

Directive Antenna for Ultrawideband Medical Imaging Systems

Figure 5

The simulated three-dimensional radiation pattern.
854012.fig.005a
(a) 4 GHz
854012.fig.005b
(b) 6 GHz
854012.fig.005c
(c) 9 GHz
854012.fig.005d
(d) 11 GHz