Heptagonal Fractal Antenna with Slit for Improved Efficiency

The demand for antennas with high gain, compact size and light weight is increasing due to advancement in technology. Antenna with wide coverage area is desirable for many applications. In order to support antenna with low profile and wide coverage area, it is proposed to choose Fractal antennas operating at 2.4 GHz. The designed Sierpinski fractal antenna operates at ISM band. To employ the antenna for wearable applications, the specific absorption should be less than 1.6W/Kg. With the advent of fractal structures, the dimension of antenna is reduced and there is no necessity that the size need to follow the relation with wavelength of operation. For bandwidth enhancement a slot is made at the center of the resonator. The antenna proposed is cheaper and is suitable for applications like Wifi, Bluetooth, Audio visual devices, and smart power meters as well as for Radio control units. Here, the comparative study of fractal antennas for different shapes is performed and the antenna with better performance was considered for fabrication.