Abstract: Beam scanning and beam forming can be achieved by nonlinear antenna array technology without the need of phase shifters.Nonlinear antenna array technology has the virtue of low cost,high integration and high efficiency.The architecture and settling time of phase distributions of nonlinear antenna array is studied in this paper.A general equation describing the phase dynamic of external locking array,unilateral locking array and mutual(bilateral) locking is deduced.Transient response of nonlinear antenna array is analyzed when the frequency parameters changes.The analytic form of settling time of nonlinear antenna array is presented.Consistency in simulation results and theoretic results shows that the analytic results are right.