Abstract: The model is constructed by using finite-different time-domain(FDTD) method,and the data are obtained with software empire.By using it,we may observe the process of the microstrip antenna radiation within the broadband range,and may easily get the input impedance,bandwidth and radiation pattern of the antenna.Then we may get the directivity coefficient of the antenna after processing the simulation data by using Matlab.paper designs a microstrip antenna whose centric frequency is 10.37 GHz and relative bandwidth is 20.7%,have received better parameter.Design and analysis of the microstrip antenna to the engineering practice have offered reference.