Design and Realization of a Planar Ultrawideband Antenna with Notch Band at 3.5 GHz

Figure 9

Measured 2D radiation patterns at (a) 3.04 GHz, (b) 6 GHz, (c) 7.38 GHz, and (d) 10 GHz (black solid line: 𝐸_𝜃; blue cross line: 𝐸_𝜑).

(a)

(b)

(c)

(d)