We present the measured radiation pattern at 2.45 and 3 GHz. The maximum value of measured realized gain of the antenna with one parasitic is 5 dB in θ = 0˚ (Figure 10). In the Figure 11, we can see the measured maximum gain versus frequency. We observe a flat gain over the frequency band 2.3 GHz to 3.3 GHz at the value around 5 dB. The efficiency of this antenna is greater than 75% over the frequency band.