A Novel Microstrip Fractal Antenna with Dual Polarization

In this paper, a novel Microstrip Fractal patch antenna with dual polarization, which operates in a frequency band of 2-4 GHz (S- band) is proposed. Two challenging issues in the design of dual polarized antennas are obtaining high isolations and low cross polarized levels. Here we propose a technique to overcome these drawbacks by making use of the fractal geometry. The use of fractal geometry will improve bandwidth and reduce isolation loss. These geometries can also improve impedance matching. The proposed fractal antenna shows multiband characteristics by which the bandwidth can be improved. Sierpinski carpet fractal structure is used which shows high isolation compared to conventional dual patch antenna. Simulations are done by using Ansoft High Frequency Structure Simulator (HFSS) software. The proposed antenna finds its application in weather radars, communication satellites and wireless communications with improved bandwidth.