Design of WLAN/WiMAX band notch super-wideband microstrip fractal antennas

A super-wideband microstrip fractal antenna is designed with miniaturized dimensions of 21 mm x 23.5 mm x 1 mm and generation of dual rejection bands for WLAN/WiMAX systems has been achieved. The triangular fractal shape slots are placed inside a circular patch and the antenna is miniaturized by using a repetition frequency resonance technique. The proposed antenna frequency range 2.6-40 GHz operates for VSWR of less than 2. Two band rejections for the frequency ranges 5.1-5.8 GHz and 3.4-3.7 GHz are created by one enhanced slot at the feed line and one split-ring resonator at the back of antenna. HFSS 3D software was used for computer simulation. The proposed antenna is fabricated on the FR4 substrate with 1 mm thickness. The measurement data show good agreement with the simulation results.