分析位于任意形状导体上天线的输入阻抗是一个复杂的电磁边值问题，这类问题一般很难得到解析解。在数值分析中，矩量法是一个非常有用的工具。线栅法曾被用来分析这类三维问题。但对于天线的近场特性，它存在一定的不足和困难。面元剖分可以克服线栅法的缺点。Ｒａｏ采用三角面元剖分方法，分析了位于导体上的天线特性。然而，在Ｒａｏ的数值模型中，他将结点区对边边界上的电流假设为零。为此，我们对Ｒａｏ的这一结点模型进行了修正，修正后的结果表明，理论与实验符合得较好 It is a complex electromagnetic boundary value problem to analyze the input impedance of an antenna located on a conductor of arbitrary shape. Such problems are generally difficult to obtain analytic solution. In numerical analysis, the moment method is a very useful tool. Wire grid method has been used to analyze these three-dimensional problems. But for the near-field characteristics of the antenna, it has some shortcomings and difficulties. Parallels can overcome the shortcomings of wire grid method. Rao uses triangulation method to analyze the characteristics of the antenna located on the conductor. However, in Rao’s numerical model, he assumes that the current on the opposite side of the node region is zero. For this reason, we have revised this node model of Rao, and the revised result shows that the theory is in good agreement with the experiment