Compact dual band planar monopole antenna for WLAN/WiMAX

Modern wireless communication systems are greater demands for antenna designs. Planar monopole antenna is used to achieve broad bandwidth. Planar monopole antenna with its attractive characteristics satisfies the requirements of low weight, low cost, simple structure and regular omnidirectional radiation pattern. A compact planar monopole antenna for multiband and wideband operations is proposed. Asymmetrical and symmetrical beveling antenna's performance are compared. The proposed antenna consists of U shaped monopole and T shaped stub resonator. A beveling lower edge of the patch is introduced to expand impedance bandwidth. The compact antenna operates in two frequency bands 3.5GHz (3.35-3.94 GHz) WiMAX and 5 GHz (5-6.63 GHz) WLAN bands.