CPW fed hexagonal micro strip fractal antenna for UWB wireless communications

This paper presents the hexagonal microstrip fractal antenna (HMSFA) for ultra wideband wireless communication applications. Hexagonal antenna is powered through co-planar waveguide (CPW) feed structure. The stepping fed configuration is used to improve the antenna electrical characteristics at the centre and higher frequencies in the FCC designed UWB frequency range from 3.1 to 10.6 GHz. The proposed antenna uses a fractal technique to analyze its UWB characterization. The hexagon antenna is designed, simulated and fabricated on a polyamide substrate of dielectric constant ɛ r = 4.3, thickness t = 1.53 mm, loss tangent tan δ = 0.004 and lande G factor 2. The operating bandwidth of the proposed fractal antenna is about 9 GHz more than UWB range. The size of the radiating patch is about 26 mm × 30 mm and the sided length s = 15 mm, achieves good impedance matching, constant gain, steady radiation patterns, multi resonant and constant group delay over an UWB frequency range from 3.1 to 10.6 GHz. This antenna creates the fractal geometry inside the patch with similar in shape but different in sizes. The proposed antenna is fabricated and experimental results are verified in an anechoic chamber of millimetre and antenna lab.