Modified Sierpinski carpet fractal shaped slotted UWB monopole antenna with band notch characteristic

Abstract

This paper presents the design of fractal ultra wide band antenna using 3rd iterative modified Sierpinski carpet pattern slots on a circular monopole. Better performance with respect to impedance bandwidth is achieved by truncating the ground plane in steps as well as using fractal slots on the monopole. Further incorporation of the U-shaped slot within ground plane make the structure band notched for the frequency range of 5–6 GHz which is commercially used for WLAN. The proposed antenna shows nearly 117% impedance BW along with stable group delay and radiation characteristics over the entire frequency band.