Comparative analysis of Koch, sierpinski and composite fractal antennas with rectangular microstrip fractal antenna

In this paper a comparison has been made between the existing fractal antennas with the proposed microstrip antenna. The proposed antenna is designed by using fractal technique and the antenna can be used for different wireless applications as per FCC standards such as WiMAX (3.3–3.7), point to point high speed wireless communication (5.92–8.5) and WLAN (4.82–5.95). All the antennas are designed by using FR4 epoxy substrate with dielectric constant of 4.4 and thickness 1.6mm. The results of proposed antenna are compared with the existing antennas (Koch, sierpinski, composite and wide band fractal antennas). It has been analyzed that the proposed antenna shows the better results as compared to the existing antennas. The existing antennas works on three or four frequency bands of operation, where as proposed antenna works of seven different resonant frequency bands. Values of gain and return loss of the designed antenna is at acceptable level for all the frequency bands. This shows that the designed antenna is suitable for the different wireless applications.