This paper presents the results of a research project aimed at studying the behavior of the radiation pattern of a patch antenna through computer simulations. In this sense, is present the basic guidelines for design, implementation and preliminary simulation of different antenna prototypes through an algorithm simulator developed in MATLAB ® environment. Comparative studies of the simulation values are performed with the software LVDAM-ANT® which relate simulation data with actual experimental values. The results obtained demonstrate the efficiency of the simulation algorithm developed to underpin the study presented in this paper.