This article describes the modeling of a resistive voltage divider (RVD) by rational functions using the vector fitting (VF) tool. The method is applied to ratio and phase displacement measurements over a wide frequency range. A Monte Carlo simulation-based sensitivity analysis was carried out to properly estimate the model uncertainty. The modeling tool proved to be an advantageous alternative with suitable adherence to the traced points, not exceeding a few parts in 106. Real and imaginary parts can be taken into account in the same fitting, preserving their correlation for the uncertainty estimation. Such a black-box approach can also help to estimate intermediate and above limit points since the transfer function is given by the tool.

中文翻译：

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通过有理函数对电阻分压器建模：不确定性评估

本文介绍了使用矢量拟合 (VF) 工具通过有理函数对电阻分压器 (RVD) 进行建模。该方法适用于宽频率范围内的比率和相位移测量。进行了基于蒙特卡罗模拟的敏感性分析，以正确估计模型的不确定性。建模工具被证明是一个有利的替代方案，它适当地坚持跟踪点，不超过 106 的几个部分。在同一拟合中可以考虑实部和虚部，保留它们的相关性以进行不确定性估计。由于传递函数是由工具给出的，因此这种黑盒方法还有助于估计中间和高于极限点。