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Realization of coaxial reference air-lines as high frequency capacitance standard at CSIR-NPL

IR@NPL: CSIR-National Physical Laboratory, New Delhi


Field	Value

Title	Realization of coaxial reference air-lines as high frequency capacitance standard at CSIR-NPL

Creator	-, Satish Kumar, Sachin -, Babita John, Thomas Saxena, A. K.

Subject	Engineering Instruments/ Instrumentation

Description	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.

Publisher	Elsevier

Date	2016-10

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://npl.csircentral.net/2343/1/Realization%20of%20coaxial.pdf -, 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

Relation	http://npl.csircentral.net/2343/