Patel , Kamlesh and Negi, P. S. and Kothari, P. C. (2008) Complex S-parameter measurement and its uncertainty evaluation on a vector network analyzer. Measurement, 42 (1). pp. 145-149. ISSN 0263-2241

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Abstract

The present paper deals with an uncertainty evaluation in complex scattering (S)-parameter measurements and the correlation coefficients between the real and imaginary components of S-parameters in the frequency range 2–18 GHz. The measurements were performed for one-port and two-port components using a vector network analyzer (VNA) and the uncertainty estimation for complex transmission and reflection coefficients were done separately. The various contributors to the measurement uncertainty in real and imaginary component of S-parameter have been evaluated as per the European cooperation for Accreditation (EA) Guidelines on VNAs. Uncertainty budgets have been provided for one/two-port components separately with various sources of uncertainties involved and their distribution. This paper reports the combined standard uncertainty within ±0.005 and ±0.015 in complex transmission and reflection coefficients, respectively, upto 18 GHz. The correlation coefficients (+1.0 to −1.0) between the real and imaginary components of S-parameters are calculated for a coaxial mismatch of voltage standing wave ratio (VSWR) ≈3.0 and a coaxial attenuator (3 dB) in Type-N connectors.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Complex S-parameter; Standard uncertainty; Correlation coefficient; Vector network analyzer; EA guidelines
Subjects:	Engineering Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	16 Aug 2012 11:54
Last Modified:	16 Aug 2012 11:54
URI:	http://npl.csircentral.net/id/eprint/429

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