IEEE 802.11x standard widely used in wireless local area network systems is called Wi-Fi as well. In this study high gain Microstrip Antenna (MA) design is presented for 2.4 GHz WLAN application. Simulations were made on parameters such as the geometry and size of antennas, type of dielectric material, the thickness of substrate for most appropriate designing of antenna. For simulations, HFSS software which is a full wave and finite element based simulator was used. Total maximum gain of the designed antenna were obtained as 9.06 dB.