Near field communication is a kind of short distance wireless communication technology based on the development of the wireless radio frequency technology. In view of the present can not meet the requirements of data transmission in a mobile terminal of large capacity, high efficiency of the problem, in this paper, the main methods to realize high speed communication is presented in this paper. The analysis of near field characteristics of antenna coupler FDTD computing model bynear field coupling way. The modulation of Gauss pulse feed, by FDTD simulation method,analyzed in detail for different position coordinate corresponding timedomain waveform andspectrum, electromagnetic coupler and at the same time shape compared so as to obtain the optimization model. It has certain reference value to the conclusions of the study design of highspeed nearfield communication antenna.