COMPACT CPW-FED TRI-BAND ANTENNA FOR WLAN/WIMAX APPLICATIONS

In this paper, A novel compact co-planar waveguide (CPW)-fed tri-band antenna with dual band-notched characteristic is proposed. This antenna consists of a circular element, two inverted L-shaped slots, and a T-shaped slot etched into the circular element, which lead to the desired high attenuation at the two notch frequencies: 2.56 GHz – 3.25 GHz and 3.8 GHz – 4.96 GHz. The proposed tri-band antenna is CPW-fed and printed on an low-cost FR-4 substrate with only 20 mm × 28 mm surface area. The antenna is successfully simulated by the full-wave electromagnetic (EM) simulator HFSS and measured to cover the bandwidth for WLAN and WiMAX (2.40 GHz – 2.54 GHz, 3.24 GHz – 3.76 GHz, 4.96 GHz – 6.65 GHz) applications. Experimental results show that, the proposed tri-band antenna is obtained with promising performances, including omnidirectional radiation patterns and stable gains across its whole operation bands.