A Triple-band Monopole Antenna with Parasitic Elements for WLAN and WiMAX Application

In this paper, the simulation and measured results of a triple-band monopole antenna with parasitic elements for application in WLAN and WiMAX bands are presented. The triple-band monopole antenna with parasitic elements is fabricated on a FR4 substrate. The lower band is associated with the parasitic inverted-C shaped strip in the back side, the middle band is expected to be controlled by the length of monopole in the front side, while the higher band is associated with the two shorted parasitic strips in the ground. The proposed antenna has good agreement between the measured and the simulation results. The proposed antenna has a 10 dB return loss with bandwidth 150 MHz (2,370-2,520 MHz) in the lower band, 910 MHz (3,1304,040 MHz) in the middle band, and 1,040 MHz (5,020-6,060 MHz) in the higher band. The proposed triple-band monopole antenna with parasitic elements covered the ISM, HIPERLAN, UNII, and WiMAX bands.