We can see that the obtained bandwidths of the
antenna entirely satisfy the IEEE 802.1 la/b/g standards very
well. From Fig. 3, the radiation patterns at the two resonant
frequency bands, 2.45 GHz and 5.25 GHz, in the x-z, y-z, and
x-y plans show us that the proposed antenna is responsible for
using in the omni-directional communication systems, such as
WLAN.