本文介绍了如何构造矩量法展开基函数的一种方法 -空腔模型法。文中首先根据空腔模型所得到的内部场结构推导出贴片表面电流的表达式 ,然后与文献中已有的计算结果和实验结果相比较。计算结果与实验结果相当吻合 ,并且比文献[7]的计算结果更具有精确性 ,从而验证了本文所述方法的正确性。 This article describes how to construct a method of moment function to expand the basis function - cavity model method. In this paper, the expression of the surface current of the chip is deduced from the internal field structure obtained from the cavity model, and then compared with the existing calculation results and experimental results in the literature. The calculated results are in good agreement with the experimental results and more accurate than the results in [7], which verifies the correctness of the proposed method.