The performance of this antenna was simulated and optimized by “IE3D” 12.32 version of Zeland. This
was used to calculate the return loss, impedance bandwidth and radiation pattern. The simulated -10 dB return loss
of the proposed antenna is shown in the figure 2. The simulated result shows that the resonant frequency locates at
about 2.42 GHz covering from 2.2 GHz to 2.65 GHz. The simulated impedance bandwidth of 19% is achieved at -10
dB return loss. The simulated radiation patterns of the elevation and azimuth of the proposed antenna are shown in
figure 3. It can be observed that the proposed antenna have the same radiation patterns over the entire frequency
band.