Stability tests of electronic calibration units

Zeier, M.; Hoffmann, Johannes; Hürlimann, P.; Rüfenacht, Jürg; Wollensack, Michael; Judaschke, R.; Kuhlmann, Karsten

doi:10.1109/cpem.2014.6898236

Cited by 3 publications

(3 citation statements)

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“…3 represents the measurement setup to account for the drift in the ECU states depending on temperature. Generally, a heater is installed inside the ECU to minimize the effects of external temperature changes, but the ECU state changes slightly with temperature [9,14]. To accurately count this effect, we thermally isolated the ECU and the outside by employing a temperature chamber.…”

Section: B Drift T Ijmentioning

confidence: 99%

“…A detailed characterization method for random errors can be found in [8]. The reflection coefficient M at the input port is as follows [8];   1 When the uncertainty of the reference calibration kit is propagated linearly using the Taylor series, it can be expressed as the product of the Jacobian matrix and the covariance matrix as follows [14]. Jacobian matrix…”

Section: Appendix D Uncertainty Of Ecu Statesmentioning

confidence: 99%

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Uncertainty Analysis of Scattering Parameters Calibrated by an Electronic Calibration Unit Based on a Residual Model

et al. 2022

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We propose a new residual model to analyze the uncertainty of scattering parameters (Sparameters) calibrated by an electronic calibration unit (ECU). Residual errors are usually estimated from the observed ripple after connecting a load or a short at the end of an airline. Therefore, this ripple method can only be used in a frequency range where the airline loss was not large. We, however, obtained the residual error from the uncertainty of the calibration kit using a simple numerical approach. As a result, we can determine the correlations between real/imaginary and magnitude/phase uncertainties. The proposed residual model showed the same results as the VNA error model. We also added a new error term to account for the effect of temperature-dependent drift of the ECU. In addition, we analytically derived the sensitivity coefficients for a 2-port DUT based on the proposed residual model. The proposed residual model will be helpful for the uncertainty analysis of S-parameters calibrated using the ECU.

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Section: B Drift T Ijmentioning

confidence: 99%

Section: Appendix D Uncertainty Of Ecu Statesmentioning

confidence: 99%

Uncertainty Analysis of Scattering Parameters Calibrated by an Electronic Calibration Unit Based on a Residual Model

et al. 2022

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“…In addition, the NPL, CMI, Czech Technical University Prague (CTU), University of Leuven (KU Leuven), University of Leeds (ULE) and Keysight Technologies (Keysight) have extended metrology support beyond the standard 50 Ω impedance in coaxial lines to cover extreme impedances [72], nonlinear measurements [73], higher frequencies [74], and other transmission line types [75,76]. Electronic calibration units promise to replace mechanical measurement standards but are limited in accuracy due to temperature effects, as investigations by PTB and METAS have shown [77].…”

Section: Rfandmw Metrologymentioning

confidence: 99%

Metrology in electricity and magnetism: EURAMET activities today and tomorrow

et al. 2017

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Metrology dedicated to electricity and magnetism has changed considerably in recent years. It encompasses almost all modern scientific, industrial, and societal challenges, e.g. the revision of the International System of Units, the profound transformation of industry, changes in energy use and generation, health, and environment, as well as nanotechnologies (including graphene and 2D materials) and quantum engineering. Over the same period, driven by the globalization of worldwide trade, the Mutual Recognition Arrangement (referred to as the CIPM MRA) was set up. As a result, the regional metrology organizations (RMOs) of national metrology institutes have grown in significance. EURAMET is the European RMO and has been very prominent in developing a strategic research agenda (SRA) and has established a comprehensive research programme. This paper reviews the highlights of EURAMET in electrical metrology within the European Metrology Research Programme and its main contributions to the CIPM MRA. In 2012 EURAMET undertook an extensive roadmapping exercise for proposed activities for the next decade which will also be discussed in this paper. This work has resulted in a new SRA of the second largest European funding programme: European Metrology Programme for Innovation and Research.

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