The smart antennas are antenna arrays with smart signal processing algorithms used to identify spatial signal signature such as the direction of arrival (DOA) of the signal, and one of the most important processes is beam forming. In the most important function in beam forming is changing beam pattern of antenna for a particular angle. In the algorithm, a set of position and velocity for angles and amplitudes of antenna currents has been generated to optimized solution in desired direction. The signal gain and interference ratio are compared with genetic algorithm method. The factors that are considered in our method are interference, phase angle and number of patterns.