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从麦克斯韦方程出发 ,对标准微带结构利用边界条件得出微带线上传输的信号为准 TEM模的电磁波 ,并对其适用的条件给以分析总结 .通过对麦克斯韦方程的数学运算 ,推导出微带线场的横向分量满足二维拉普拉斯方程 ,由此证实微带线场的解可通过计算二维静电场获得 .最后阐述了传输线电路模型的电容矩阵 [C]和电感矩阵 [L ]均可通过解相应的静电场和静磁场来获得 ,并进一步论证了通过计算自由空间电容矩阵 [C0 ]来计算电感矩阵 [L ]的方法 .
Starting from the Maxwell equation, the signal of the microstrip line is obtained by using the boundary conditions of the standard microstrip structure as the electromagnetic wave of the quasi-TEM mode, and the applicable conditions are given.According to the mathematical operation of the Maxwell equation, The transverse component of the microstrip line field satisfies the two-dimensional Laplace equation, which confirms that the solution of the microstrip line field can be obtained by calculating the two-dimensional electrostatic field. Finally, the capacitance matrix [C] and the inductance matrix of the transmission line circuit model [ L] can be obtained by solving the corresponding electrostatic field and static magnetic field, and further demonstrate the method of calculating the inductance matrix [L] by calculating the free-space capacitance matrix [C0].