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偏轴传输线中的TEM波的分布规律,可通过复数坐标系z上的分式线性变换,首先由静态场在相同边界条件下得出的电场的解,再乘以波动因子e-jβκ得到电场的分布,然后根据由麦克斯韦方程所联系的电场与磁场的关系,得到磁场的分布,从而给出偏轴传输线中TEM波的电磁场分布规律,通过数学软件MATLA绘制出TEM波在其横截面上的结构图,计算出其特性阻抗。研究结论解决了偏心传输线的计算问题,并为一般的同轴线的加工精度提供了理论依据。
The TEM wave distribution in the off-axis transmission line can be obtained by the fractional linear transformation on the complex coordinate system z, firstly, the solution of the electric field obtained from the static field under the same boundary conditions and then multiplied by the fluctuation factor e-jβκ to obtain the electric field Then the distribution of the magnetic field is obtained according to the relationship between the electric field and the magnetic field which is related to Maxwell’s equation. The electromagnetic field distribution of the TEM wave in the off-axis transmission line is given. The TEM wave is plotted on the cross section of the TEM wave Structure chart, calculate its characteristic impedance. The conclusion of the research solves the calculation problem of eccentric transmission lines and provides a theoretical basis for the machining accuracy of common coaxial lines.