Calculation method for distributed capacitance matrix of three-conductor transmission line based on S parameter

The invention discloses a calculation method of a distributed capacitance matrix of a three-conductor transmission line based on an S parameter, relates to the technical field of electromagnetic compatibility, and solves the technical problem that the calculation method of the distributed capacitance matrix of the three-conductor transmission line per unit length is not simple enough. According to the technical scheme, the calculation method for the distributed capacitance matrix of the three-conductor transmission line based on the S parameter is characterized in that the distributed capacitance matrix of the cable is rapidly and accurately solved in a testing mode under the condition that the dielectric constant around the cable is unknown, and therefore a transmission model of the non-uniform three-conductor transmission line is constructed. 本发明公开了一种基于S参数的三导体传输线分布电容矩阵的计算方法，涉及电磁兼容技术领域，解决了三导体传输线单位长度分布电容矩阵的计算方法不够简单的技术问题，其技术方案要点是基于S参数的三导体传输线分布电容矩阵的计算方法，通过测试的方式，在线缆周围介电常数未知的情况下较为快速准确的求解线缆分布电容矩阵，从而构造非均匀三导体传输线的传输模