GROUNDED COPLANAR WAVEGUIDE FED ULTRA WIDEBAND FRACTAL MONOPOLE ANTENNA

摘要

in this paper a compact and super wideband groundedcoplanar waveguide (GCPW) fed fractal monopole antenna ispresented. Antenna size is significantly reduced as compared to thesimple polygonal antenna and size of proposed antenna is25×30×1.524 mm3. The octagonal fractal antenna is fabricated onRogers RO4003C with εr=3.38. The base structure of antenna isconsist of an octagonal that a circle is cut from it. Five iterations ofbase shape are performed. Overall fractal geometry appears as a centraloctagonal array surrounded by concentric scaled octagonal arrays. 50?GCPW structure is used for feeding. Antenna is analyzed over 2-12GHz frequency range. S11, gain plots and radiation patternscomparison is made in this work. The antenna shows better than 13 dBreturn loss and peak gain 5±2 dB over FCC UWB from 3.1 to 10.6GHz.