GROUNDED COPLANAR WAVEGUIDE FED ULTRA WIDEBAND FRACTAL MONOPOLE ANTENNA

Abstract

In this paper a compact and super wideband grounded coplanar waveguide (GCPW) fed fractal monopole antenna is presented. Antenna size is significantly reduced as compared to the simple polygonal antenna and size of proposed antenna is 25×30×1.524 mm3. The octagonal fractal antenna is fabricated on Rogers RO4003C with εr=3.38. The base structure of antenna is consist of an octagonal that a circle is cut from it. Five iterations of base shape are performed. Overall fractal geometry appears as a central octagonal array surrounded by concentric scaled octagonal arrays. 50Ω GCPW structure is used for feeding. Antenna is analyzed over 2- 12GHz frequency range. S11, gain plots and radiation patterns comparison is made in this work. The antenna shows better than 13 dB return loss and peak gain 5±2 dB over FCC UWB from 3.1 to 10.6 GHz.