ISSN: 2312-7694 Nidhi et al, / International Journal of Computer and Communication System Engineering (IJCCSE), Vol. 2 (2), 2015, 274-278 274 | Page © IJCCSE All Rights Reserved Vol. 02 No.02 April 2015 www.ijccse.com Fractal T-Shaped Antenna for WiMAX Applications Nidhi Lal Dept. of Wireless Communication and Computing Indian institute of Information Technology Allahabad, India nidhi.2592@gmail.com Shishupal Kumar Dept. of Wireless Communication and Computing Indian institute of Information Technology Allahabad, India iwc2013016@iiita.ac.in Shikha Baghel Dept.Wireless Communication and Computing Indian institute of Information Technology Allahabad, India iwc2103009@iiita.ac.in Abstract— Fractal antenna, as name concerns, uses fractal i.e. structure does not change and repeat it when large focus has created upon it. This repetition feature of this antenna provides a great flexibility that it can be designed and can used in different frequencies. Fractal geometry has shown its potential in many fields of engineering and technology. In antenna engineering fractal geometry is very useful for performance improvement, in terms of gain and other things. This paper presents a modified fractal T- shape antenna meant for WiMAX applications. The simulation results of the proposed design show that the fractal shape gives better performance than that of existing one. Simulation outcomes also demonstrate that the anticipated design gives enhanced performance in stipulations of return loss. Simulation results show that the operating frequency of the proposed antenna is applicable for WiMAX applications. Index Terms—Printed Antenna; Triangular Slot; Rectangular Slot; WiMAX. I. INTRODUCTION All The demand for low cost and compact antenna has been resulted from the rapid development of wireless communication devices. WiMAX belongs to IEEE 802.16 family of standards. The full form of WiMAX is Worldwide Interoperability for Microwave Access, it provides a data rate of 30-40 Mbps, enabling us with interoperable implementations. Because of simplicity and low cost, printed antennas are a common candidate for these types of applications. Due to the compactness and minimum fabrication cost of the printed antenna, many researchers are exploring this field. A compact T-shaped antenna is proposed in [1] for WiMAX applications with a return loss around -10dB. There are three frequency bands for the WiMAX applications, 2.5- 2.69 GHz, 3.2-3.6 GHz and 5.2-5.8 GHz ranges [2], these are classified as lower band, middle band and upper band correspondingly. This paper anticipated a waveguide fractal T- shaped antenna for WiMAX applications by means of a return loss is -16.66 dB, with inclusion of middle band frequency i.e. 3.4GHz. Many advantages of WiMAX applications are including smart grids, metering and telecommunications services. There are many remote areas where extension of cables is somewhat difficult, but using WiMAX application this problem can be addressed [3]. To expand the bandwidth of antennas and other parameter like return loss different shapes of patch have also been used. WiMAX is a wireless communication standard designed to provide 30 to 40 megabit-per-second data rates. In this proposed antenna total space occupied is 20x20x1.524 mm 3 [1]. Fractal antennas gives a finite area of coverage but the diameter of perimeter becomes infinite. Fractal antenna is used in most of the traditional and innovative applications today. In antenna engineering fractal geometry is very useful for performance improvement, in terms of gain and other things. Fractal antenna gives high performance with high variation in the size of its structure. Fractal antenna inherits the feature of Euclidean antenna. The use of fractal in Fractal antenna by two ways. In the first way, antenna elements are becoming discrete to end Application’s users and in the second way, a blueprint antenna is proposed which uses self-structure geometry so that resultant antenna can work on different frequencies. The fractal design has been introduced to increase the return loss of the antenna. The anticipated antenna is appropriate for utilize in laptop resembling devices.