INRIM同轴微量热计的改进及模型比较结果
Improvements on INRIM Coaxial Microcalorimeter and Outcome of a Model Comparison
摘要:
本文介绍了INRIM同轴微量热计的硬件和软件改进,以及在0.05 - 40 GHz频段实现主功率标准的结果。一个更好的温度和功率稳定性,提供了一个改善的信号/噪声比和漂移减少在每一个工作条件下的微量热计。在测量不确定性方面,INRIM校正模型也与传统的但更快的模型进行了比较。结果以2.92 mm热电功率传感器校准的形式呈现,结果表明测量系统的稳定性和可重复性得到改善。
英文摘要:
This paper describes hardware and software improvements of the INRIM coaxial microcalorimeter together with their outcome on the primary power standard realization in the frequency band 0.05 - 40 GHz. A better temperature and power stabilization turned out to provide an improved signal/noise ratio and a drift reduction in every working condition of the microcalorimeter. The INRIM correction model is also compared to a traditional, but faster, one in terms of measurement uncertainty. Outcomes are presented in form of a 2.92 mm thermoelectric power sensor calibration together with results that show the improved stability and repeatability of the measurement system.
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