Estimation of uncertainty in impedance measurement at narrow and broadband microwave frequencies

Swarup, R.; Negi, Puneet; Mendiratta, Rahul

doi:10.1016/s0263-2241(02)00041-6

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…After the evaluation of the uncertainty co mponents of uncertainty as described in the previous sections, the associated uncertainties of various parameters are estimated as per GUM document. The uncertainty estimation of reflection and transmission magnitude in linear and logarith mic formats is performed using the model equations given in the reference [27], whereas the uncertainty in the reflection and transmission phases are estimated based on the references [16] and [25]. We calibrated two-port VNA Wiltron 37247B fo r SOLT calib ration using Anritsu coaxial calibrat ion kit 3653 in Type-N connector.…”

Section: Complex S-parameters Measurement and Its Verificationmentioning

confidence: 99%

Estimation of Complex and Linear Uncertainities in S-Parameter Measurements for Metrology Applications

Patel¹,

Negi²

2012

IJEA

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The present paper aims to develop a uniform procedure of estimating uncertainty components in VNA measurements whether in complex or linear units. The individual response of each uncertainty components have been studied in the frequency range 1 to 18 GHz, which are applicable for one-port and two-port measurements. The Vector network analyser (VNA) measurements are performed to assign an overall uncertainty for the respective measuring parameter in terms of comp lex and linear units for coaxial step attenuator, fixed attenuator and mis match. These measurements are then verified through the primary and transfer standards of the attenuation and impedance parameters and thus the traceability of the VNA measurements is established. Finally, the outcome of co mplete study has been presented as VNA measurements based new calibrat ion and measurement capabilit ies (CM Cs) for NPL, India. It has shown that the final combined uncertainty is found same or nearby by obtaining from uncertainty components either in complex or in linear units. Thus, this paper reports the estimation of VNA measurement uncertainties for various parameters as per the requirements of IS O/IEC 17025:2005 standard.

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Section: Complex S-parameters Measurement and Its Verificationmentioning

confidence: 99%