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本文所介绍的保角变换和快速富里叶变换相结合的方法,采纳了离散处理的思想,吸取了快速富里叶变换的技巧,直接利用了传统解法的结果,大大扩展了保角变换法解决问题的范围。用本方法分析计算近似圆截面导体同轴电缆的基本步骤是:1.用Theodorsen-Garrick变换将内导体边界变换到单位圆;2.在上述变换下变换内导体边界;3.借助于Garrick变换完成内外导体边界到两个同心圆的变换;4.最后用圆截面同轴电缆公式计算Z_c、L、C诸参数。
The method of combining conformal mapping and fast Fourier transform introduced in this paper adopts the idea of discrete processing, absorbs the skill of fast Fourier transform and directly utilizes the result of traditional solving method, greatly expanding the conformal transformation method to solve the problem Range. The basic steps for the analysis of a coaxial conductor of approximately circular cross-section using this method are: 1. Transform the inner conductor boundary to a unit circle using the Theodorsen-Garrick transformation 2. Transform the inner conductor boundary under the above transformation 3. Calculate the inner conductor boundary by means of the Garrick transform Complete the inner and outer conductor boundary to two concentric transformation; 4. Finally, use the circular cross-section coaxial cable formula to calculate Z_c, L, C parameters.