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在采用ＭＰＩＥ方程计算微带天线的参数时，由于无法精确确定零距离处的空间域并矢Ｇｒｅｅｎ函数和标量Ｇｒｅｅｎ函数的奇异值，对微带天线的整个计算结果的精确度产生了不利影响。对此，本文在讨论采用离散复镜象理论计算空间域Ｇｒｅｅｎ函数时，提出了采用该镜象理论计算空间域Ｇｒｅｅｎ函数零距离处奇异值的解析方法，即，采用Ｔａｙｌｏｒ公式展开镜象理论得到的空间域Ｇｒｅｅｎ函数的有限级数和形式，并结合特定的分域基函数来得到零距离处Ｇｒｅｅｎ函数奇异值的解析计算式进行计算。经过对微带天线输入阻抗的实际计算和与实测值的比较，本文提出的方法提高了计算微带天线的输入阻抗的精确度。该方法也可以用于计算微带天线的其它参数，比如远近场分布等。该方法与离散复镜象理论相结合，对于采用ＭＰＩＥ法计算其它微带结构的参数，都是可以借鉴的。
When using the MPIE equation to calculate the parameters of a microstrip antenna, the precision of the entire calculation result of the microstrip antenna can be adversely affected because it is impossible to accurately determine the singular values of the spatially diked Green function and the scalar Green function at zero distance. In this paper, this paper discusses the use of discrete complex image theory to calculate the spatial domain Green function, the use of the mirror image theory to calculate the spatial function of the Green function zero distance singular value of the analytical method, that is, using the Taylor formula mirror theory The finite series and the form of the Green function obtained in the space domain are calculated and the analytical formulas for the singular values of the Green function at zero distance are obtained by combining with the specific subdomain functions. After the actual calculation of the input impedance of the microstrip antenna and comparison with the measured value, the proposed method improves the accuracy of the input impedance of the microstrip antenna. The method can also be used to calculate other parameters of the microstrip antenna, such as the far-near field distribution. This method, combined with the theory of discrete complex mirroring, can be used to calculate the parameters of other microstrip structures by the MPIE method.