Science and Education Publishing American Journal of Electrical and Electronic Engineering 2 4 2014 09 10 Design of a Novel Sierpinski Fractal Antenna Arrays Based on Circular Shapes with Low Side Lobes for 3G Applications 137 140 EN Manas Ranjan Jena Department of ELTCE, Veer Surendra Sai University Of Technology,Burla,Odisha B.B. Mangaraj Rajiv Pathak AJEEE2014243 10.12691/ajeee-2-4-3 2014 09 04 2014 09 07 2014 09 10 A fractal is a recursively generated object having a fractional dimension. So many objects, including antennas, can be designed using this recursive nature of a fractal. In this paper we have used the fractal geometry arrangements for the design of planar antenna arrays with low side lobes. Iterated Function System (IFS) is used to generate the sierpinski fractal antenna arrays using circular shapes. CST Microwave Studio EM Simulation software is used for design & simulation of these antenna arrays. Two resonant frequencies like. 1936 GHz &. 222 GHz are achieved. Better performance parameters like return loss, VSWR, directivity, gain, bandwidth enhancement with low SLL are estimated.