多层介质中谱域格林函数的解析公式及在微带天线中的应用

首先假定平面电流源位于任一层介质中，然后利用谱域法和波矩阵技术，通过求解矢量电波场动方程，推导出了多层介质中谱域格林函数的解析公式，将所得公式应用于多层介质微带 天线的分析中，得 到了天线辐射场的理论计算公式，分析计算了一些工程实例，实验结果证实了理论计算的正确性。

The Expressions of Spectral-domain Green''''s Function for Multilayer Dielectric Structures with Application to Microstrip Antennas

The expressions of spectral-domain Green's function of multilayer dielectric structures is derived in the general case of a planar integrated structure fed by a distribution of two dimensional current sources arbitrarily located in any dielectric layer. It is derived by solving the vector wave equation for tEe electric field in the spectral-domain, and using the wave matrix technique to take care of additional layers. This Green's function is then applied to the microstrip antennas with multilayer superstrates and substrates. The expressions for the radiation fields of this structure antenna are derived. Some numerical examples illustrating the usefulness of the expression are included. The numerical results are compared with experiment data, and its validity is verified.