-, Satish and Kumar, Sachin and -, Babita and John, Thomas and Saxena, A. K. (2016) Realization of coaxial reference air-lines as high frequency capacitance standard at CSIR-NPL. MEASUREMENT , 92. pp. 166-171. ISSN 0263-2241

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Abstract

The reported work has been carried out in the direction of establishment of metrological traceability of capacitance up to 200 MHz at CSIR-NPL. In this perspective, the set of seven coaxial reference air-lines (Type 900-LZ series) exhibiting capacitance values varying from 2 pF to 20 pF have been realized as a capacitance standard at high frequency (1 MHz-200 MHz). This is principally achieved with reference to the SI base units of the meter and the second. The standard value of capacitance of each of the reference air-line has been computed up to 1000 MHz by employing transmission line theory. The reference capacitance value of each of these air-lines has also been measured at 1 kHz which thereafter extrapolated up to 1000 MHz using resonance technique. RF impedance analyzer has been calibrated up to 200 MHz for capacitance using computed capacitance of reference air-lines as standard. The reported work will be helpful in establishing the calibration services for low value of capacitance standards in a frequency range from 1 MHz to 200 MHz at CSIR-NPL. The work will also bridge the gap between LF and RF impedance metrology.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Uncontrolled Keywords:	Coaxial air-lines Metrological traceability Capacitance standard High frequency Uncertainty in measurement
Subjects:	Engineering Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	16 Apr 2018 08:42
Last Modified:	16 Apr 2018 08:42
URI:	http://npl.csircentral.net/id/eprint/2343

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