H.F. Resistance Standards and their Use in the Calibration of an Admittance Bridge up to 60 Mc/s

Transfer standards have been developed for calibrating, at frequencies from 200 kc/s to 60 Mc/s, an admittance bridge which measures 0¿100 millimhos and ¿150 ¿¿F to +150 ¿¿F. The standards have been used to give the bridge accuracies of about ± 2% ± 0.05 millimho in conductance, and between ± 0.2 ¿¿F and ± 4 ¿¿F in capacitance, depending on the conductance that is being measured at the same time. Suggestions are made for a new type of conductance standard that should make possible accuracies of better than ± 1 % in conductance, and better than ± 1 ¿¿F in capacitance.