The aim of this study is to extract the length formulation of rectangular patch antenna for desired resonance frequency. To succeed this purpose, the experimental data is collected from literature. These input-output data pairs are used to find unknowns at the equation template. Therefore an optimization algorithm is needed. In this study, self organize migration algorithm which isn't investigated and Turkish literature, is used. By this way, not only a new equation is obtained, but also provided a Turkish source for SOMA algorithm.