Abstract
This paper presents a modified circular disk monopole antenna which work for the entire UWB bandwidth from 3.34 GHz to 14.11 GHz. Here circular disk monopole antenna performance is improved by cutting a rectangular and cylindrical slot from the circular disk patch. This proposed antenna is fed by 50 ohm rectangular microstrip line. The proposed antenna is resonating at 5.59 GHz in the WiMax band. Further this antenna has compact size of 40mmx30mm. The value of VSWR is less than 2 for the entire UWB range. The proposed antenna is simulated on HFSS V11.1 software.
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