JWCN_V4_N4_RP2 Tanuj Kumar Gond R.K. Chauhan R.K. Prasad Journal On Wireless Communication Networks 2320 - 2351 4 4 10 15 Multiband, Bandwidth Enhancement, Slot Antenna, Worldwide Interoperability for Microwave Access (WiMAX), Wireless Local Area Network (WLAN) The design of the slot antenna with three bands for worldwide interoperability for microwave access (Wi-Max) and Wireless Local Area Network (WLAN) has been presented. This antenna consists of a leaf shaped slot and a triangular 2 parasitic patch. Area of the designed antenna is 40×40 mm and height of the designed antenna is 1.6 mm. For the purpose of feeding, a 50Ω microstrip line is used in this design. To improve the bandwidth and gain of the designed antenna, a triangular parasitic patch is used. After doing a parametric study on the parameters of the designed antenna a triple frequency band is presented. Simulated bandwidth, defined by -10db return loss can reach an operating bandwidth of 4GHz at the operating frequency 4.5GHz. The simulated result signifies that the effective bandwidth of the designed antenna is 84.15% from 2.65GHz to 6.55GHz with -10db return loss. After getting the simulated results, the designed antenna can cover the frequency band 3.27-3.97 GHz for Wi-Max systems and 5.17-5.93 GHz for the IEEE 802.11a WLAN systems. January - March 2016 Copyright © 2016 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=5910