Dual-Band Microstrip Fed Monopole Patch Antenna for WiMAX and WLAN Applications

A compact dual-band monopole patch antenna is designed for WiMAX and WLAN applications. The proposed antenna operates over two bands a lower band for WiMAX system (3.1-3.9 GHz) and higher band for WLAN system (IEEE 802.11a standard) with resonance at 3.46 and 5.48 GHz respectively. It consists of double C-slots on a rectangular patch which is directly fed by a 50 Omega microstrip line and a truncated ground with two slots cut in it. Wider bandwidth is achieved by cutting slots in the ground plane. The antenna presented is quite small with dimension of 10 x 15 x 0.8 mm(3) and quite wide impedance bandwidth of 22.85 % at resonant frequency 3.46 GHz and 35.42 % at resonant frequency 5.48 GHz. To investigate the designed antenna, various parameters of the antenna are studied such as S-parameter, current distribution, VSWR and radiation pattern.