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 technology is replacement for wireless internet access. 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 (5.2-5.8 GHz). The antenna is very essential element of communication as it is used for a transmitting and receiving electromagnetic waves.

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... y Communication devices such as mobile phones become very thin and smarter, support several applications and require higher bandwidth where the microstrip antennas are the better choice compare to conventional antennas. In this paper a Two C-Shaped slotted microstrip antenna (Figure 1) is designed and simulated for the WiMax frequency range of 3.2-2.69 GHz.. Extensive simulation results using IE3D simulator will be presented.