Bandwidth enhancement using small triangles on Sierpinski fractal

Abstract

In recent years, the science of fr actal geometry has grown into a vast area of knowledge, with almost all branches of science and engineering gaining from the new insights it has provided. In this paper modified Sierpinski fr actal patch behavior has been presented and discussed. The antenna had a log periodic behavior, the log period being related to the self similarity scale factor of the antenna. These are simulated using IE3D and analyzed in order to obtain the better understanding of antenna fr actal behavior. In the Improved Design, to increase the radiating area, small triangles are drawn outside on three sides of each eq uilateral triangle. So total side length has been increased fr om 27mm to 45 mm. Now the total perimeter for improved design is 135 mm as it was for conventional antenna 81mm, keeping the antenna size same. The Sierpinski fr actal antenna with wide band behavior characteristics has been successfully designed and implemented. The proposed fr actal antenna has been designed with fifth iteration. The results exhibits the wide band characteristics in the range fr om 2.9 GHz to 4.1 GHz corresponds to 45.47% improvement in bandwidth as it is 36.37 % for the conventional antenna. The measured radiation of the proposed antenna is linearly polarized and stable throughout the band. The antenna has smooth VSWR characteristics in the band 2.95 GHz to 3.7 GHz. It has VSWR value i.e. 1.544 for improved design, as it was for conventional antenna 1.566 at 2.95 GHz. There is 2.2 % improvement in VSWR.

A novel fractal antenna based on the Sierpinski structure for super wide‐band applications

“…As it is known by following a triangular fractal geometry, other resonances above the fundamental mode f r are appearing depending on the geometry iteration level due to the subelement resonances and higher-order modes [21][22][23]26]. The importance of expressions (1) and (2) relies on the fact that the lower cutoff frequency can be defined and fixed while geometry iterations are able to modify the coupling of the higherfrequency resonances.…”

Design of micro‐machined modified Sierpinski gasket fractal antenna for satellite communications

“…A triangular patch antenna with Sierpinski fractal design on the ground side has been simulated in Reference , genetic algorithm has been applied on the dimensions of the design to resonate in WiMAX band. An overall path of the current distribution has been increased by adding the triangles on the sides of the Sierpinski gasket fractal patch in Reference , which improves the bandwidth upto 2.2% over the conventional design at the cost of size of the antenna. A rotated square Sierpinski gasket fractal antenna is designed to resonate on multiple frequencies with a maximum gain of 5.78 dB .…”