为了解决有理分式拟合建模方法中,普遍遇到的保证生成网络的无源性的问题,该文对二端口网络的无源性条件进行了分析,提出了一种新颖而简单的局部补偿方法。其主要思路是对于拟合后的有理分式,仅针对违反网络无源性的频域范围,进行小的修正,而尽量不会影响到原来已经满足无源性的频域范围。用该方法对螺旋电感进行的拟合实验表明,生成网络无源性得到了保证,且由此引入的相对误差小于2%。 In order to solve the problem of the passiveness of generating network which is generally encountered in the method of rational fractional fitting, this paper analyzes the passive conditions of two-port network and proposes a novel and simple local Compensation method. The main idea is to fit the rational part of the fit, only for the violation of network frequency range of the passive, minor amendments, and try not to affect the original already meet the passive frequency range. The fitting experiments on the spiral inductor by this method show that the generation of network passiveness is guaranteed, and the relative error introduced by it is less than 2%.