Dual-frequency sierpinski carpet fractal geometry microstrip patch antenna / Nur Amalina Zainal Amri

This paper presents a design of Dual-Frequency Sierpinski Carpet Fractal Microstrip Patch Antenna. The frequencies operations are 1.26GHz for integrated active radar application and 1.9GHz for GSM application. This patch antenna is designed based on the 50Q characteristic impedance for the transmission line model. The size of the antenna is 100mm x 100mm. This antenna is designed on the FR4 substrate with relative dielectric constant, er = 5, loss tangent, S = 0.02 and lastly the thickness used is 1.6mm.The designed is simulated using CST Microwave Software before fabricate. Then the results based on return loss, VSWR and input impedance will be compared between simulation and measurement of the antenna by using Rohde & Schwarz ZVA40 Vector network Analyzer (VNA) 10MHz - 40MHz. The results obtained from the fabricated antenna measurement are shifted from the simulation results. The error percentage obtained from this analysis is that for the 1.26GHz is 6.4% and for frequency 1.9GHz, the percentage is about 7.9%. The bandwidth gained from the analysis also less than 5% for both frequencies