中文摘要：

针对单片微波集成电路设计需要考虑空间分辨率和结构尺寸的差异，本文提出了应用混合有限差分方法来分析设计微带电路的想法。对微带导体边缘细节部分采用准静态场来估算导体边缘内部电流分布和外部场分布。然后将准静态估算的结果合并到混合方法的动态部分。这样既保持了常规有限差分方法的精度，同时又减小了计算的复杂性。通过与常规有限差分方法对单片微波集成电路有效介电常数提取结果的比较，表明一致性很好，证明了本文方法的有效性。将这种方法应用于实际微带功分器的设计，所得结果与实测结果证明了本文方法的准确性。

英文摘要：

In this paper, the hybrid finite difference method is used in the analysis and design of micro-strip circuit. This method can deal with the issue that the difference between the spatial resolution and structure size of monolithic microwave integrated circuits （MMIC） needs to be considered. For the geometrical details, such as the edges of micro-strip line planar metal, the quasi-static field simulation is used to estimate the field and current distribution. Then the result is incorporated into the dynamic part of the hybrid method. This will maintain the accuracy of general finite difference method while reducing computational complexity. This method is applied to extract the effective die- lectric constant of MMIC. The results of this method are compared with those of conventional finite-difference （FD） method. The two results agree well, which shows the efficiency of HFDM. This method is used to analyze actual micro-strip divider. Numerical results and measurement results demonstrate the accuracy of the proposed method.