论文标题
2末端同轴电容测量和电缆校正
2-Terminal Coaxial Capacitance Measurements and Cable Corrections
论文作者
论文摘要
同轴2末端桥比较是一种广泛使用的计量方法，用于传播高达1000 pf和$ 10^4 $ rad/s的电容价值。在此范围内，电容可以用不确定性少于几个零件（$ 10^{7} $）来测量；但是，由于电缆，连接器和端口的阻抗，此类测量必须考虑到校正，该端口的阻抗可能会授予$ 10^{ - 8} $ $ $ $ $ $ $ $ $ f/f $ - $，甚至更大。在这项工作中，我们报告了目前在Inmetro上测量和计算2端对同轴桥电容测量中的校正因子如何进行的。
Coaxial 2-terminal bridge comparison is a widely used metrological method in the dissemination of value of capacitance up to 1000 pF and $10^4$ rad/s. In this range, capacitance can be measured with uncertainties as small as few parts in $10^{7}$; however, such measuments must take into account the corrections due to the impedance of cables, connectors and ports, which can tipically amount up to $10^{-8}$ $μ$F/F $-$ and maybe larger. In this work, we report on how correction factors in 2-terminal pair coaxial bridge capacitance measurements are presently measured and calculated at Inmetro.
