A novel printed monopole antenna with a combination of Koch and Giusepe Peano fractals structure fed by modified CPW for SWB applications

In this letter,a novel printed cpw-fed fractal monopole antenna is presented for super-wideband (swb) applications. the proposed antenna is composed of this combination: the first iteration of half giusepe peano fractal and koch fractal,which is applied on circular patch. to achieve impedance matching,the feed circuit is designed by a modified cpw line with a semi-circular ground plane. the presented antenna has the compact size of 40×45×0.51 mm3 and operates over the frequency band ranging from 1 to 25 ghz with bandwidth ratio 25:1 for vswr<2. the design process of the proposed structure to improve the impedance bandwidth and computed results from simulation and measurement have been presented and compared. the measurement results have a good agreement with simulated ones. this antenna is suitable for uwb and swb applications and covers most of the communication standards.