Design of double C-slot microstrip patch antenna for WiMax application

A new standard known as WiMax (Worldwide Interoperability for Microwave access) has been established by the IEEE 802.16 working group. WiMax theoretically can have coverage of up to 50 km radius. WiMax antennas have aroused high interest in recent years. Researchers are focusing on how to design antennas for WiMax technology. WiMax has three allocated frequency bands. The low band (2. 5-2.69 GHz), the middle band (3.2-3.8 GHz) and the upper band (5.25.8 GHz). Due to its advantages such as low-cost, small size low weight and capability to integrate with Microwave integrated circuits, the microstrip patch antenna is a very good candidate for integrations in applications such as wireless communication systems, mobile phones and laptops. In this paper a double C-slot microstrip antenna is designed and simulated for the WiMax frequency range of 2.5-2.69 GHz. This antenna presents an extension to the single C slot antenna presented at LAPC 2009. The proposed antenna has a gain of 6.46 dBi and presents a size reduction of 37% when compared to a conventional square microstrip patch antenna. Extensive simulation results using Advanced Design Systems by Agilent (uses the MOM method) will be presented.