Design of Modified Plus Shape Sierpinski Carpet Fractal Antenna for S and C band applications

Abstract

This paper presents the Modified Plus Shape Sierpinski Carpet Fractal Antenna (MPSSCFA) for S and C band applications. Ansoft High Frequency Structural Simulator (HFSS) software is used for simulation purpose. The FR-4 epoxy with relative permittivity 4.4 and height 1.6 mm is taken as substrate material for design of suggested antenna. This antenna is fed by 50 ohm coaxial probe feed. The suggested antenna is simulated up to 3rd iteration. The hardware implementation of MPSSCFA is also carried out. Return losses of suggested antenna are measured using Vector Network Analyzer (VNA). Experimental results show that suggested antenna works at six resonant frequencies having values (in GHz) 2.23, 4.75, 5.23, 6.61, 6.79 and 9.58 and exhibits the multiband behavior. The measured and simulated results are compared. Return Loss (RL), VSWR, gain and radiation pattern are used to evaluate performance of this antenna. All these parameters have acceptable values. A comparison of suggested antenna with similar type of antennas is also done. It is found that suggested antenna works at six frequencies with maximum gain 15.27dB where as other antennas work at the most five frequencies with maximum gain 8.95 dB. Thus suggested antenna is better than other existing antennas.