The expression of near field of a current element in the target coordinate system is obtained and its validity is tested. Then we expand the near field and the scattering field with the spherical vector wave functions. The expanding coefficients are acquired by using the orthogonality among those functions. Their simulations and the physical analysis are presented. When the target in this near filed, its scattering field is obtained. Simulations of the obtained results are given. The correctness of the results is demonstrated by the method of moment. It is concluded that when the target exists in the near field, there are respectively the TE wave and the longitudinal wave, and the longitudinal wave is the major one in scattering. The measuring angle θ has a great effect on hte scattering field. This method can be used to research scattering by other antennas such as phase array one as well as the electromagnetic interactions among targets, etc.