In this paper, a simple aperture coupled microstrip antenna at a frequency of 10GHz is presented. Here, substrates with different thickness, one using 0.762mm and second with 0.508mm, are considered. In this, various parameters have been varied for the optimization of antenna design using 3D electromagnetic simulator. This antenna is useful for wireless communication. A microstrip antenna is basically a low profile antenna with a number of advantages over other antennas like small in size, light weight, inexpensive to fabricate.