The radiation characteristic of a single antenna is analyzed by using the theory of microwave network,and the scattering matrix equation of coupling system of near-field antenna is obtained.

• 依据微波网络理论对单个天线的空间辐射特性进行了分析,并得到近场耦合系统的散射矩阵方程,依此得出结论是只要探头特性已知,探头只需两次正交极化的测量就可确定天线的辐射特性。