Asian Journal of Engineering, Sciences and Technology - Volume 5, Issue 2 2015
By Omar Masood Khan, Zain Ul Abedin, and Kamran Raza
Keywords: monpole, fractal antenna; miniaturization; multiband
—Dual element diamond Sierpinski Fractal MIMO antenna is presented with bandwidth enhanced characteristics. The antenna operates for the frequency bands of 1.8 GHz, 2.4 GHz, 3.5 GHz and 5.8 GHz for DCS, WIFI, WIMAX and WLAN applications with S11 = -10 dB matching criteria (VSWR 2:1). The two fractal elements are symmetrically placed at the adjacent sides of the substrate for overall compact size of the antenna. The proposed MIMO antenna is designed on FR4 substrate with dielectric constant of 4.4 and height of 1.6 mm. The optimization of the frequency bands of the proposed antenna on the desired operational frequencies is done by tuning the dimensions of the different slots embedded on the bottom ground plane of the substrate. The results for the s-parameters, 3D gain plots and surface currents are presented for the verification of the concept, with the gain of 2.5 dB over the whole frequency range.