Design of UWB Planar Monopole Antennas with Etched Spiral Slot on the Patch for Multiple Band-Notched Characteristics

Figure 8

Simulated and measured normalized radiation pattern at various frequencies of (a) 3 GHz, (b) 3.57 GHz, (c) 5.12 GHz, (d) 6 GHz, (e) 8.21 GHz, and (f) 9 GHz.

(a)

(b)

(c)

(d)

(e)

(f)