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This paper describes how to calibrate four-terminal-pair (4TP) admittance standards using a new short-bar method with modified Z-matrix expression containing a correction term. The short-bar method is to measure the signal to correspond to the standard with better S/N for higher impedance standard, especially 1 pF. Therefore a 1 pF capacitor can be calibrated containing the direct measurement at reporting frequencies. As this method does not require the equivalent circuit, it can be applied to general 4TP admittance calibration.
Date of Conference: 8-13 June 2008