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A measurement of frequency dependence of three-terminal fused-silica and nitrogen gas standard capacitors of value 1 pF, 10 pF, 100 pF and 1000 pF, in the range of 10 kHz to 1 MHz is presented. The frequency dependencies of these standard capacitors are measured using a direct substitution method with the NIMT capacitance reference standards. The results show similar trends: first the capacitances...
A determination of the frequency behaviour of the PTB calculable capacitor in the audio frequency range is carried out by applying an equivalent circuit model. The circuit model considers the influence of distributed admittances and impedances within the calculable capacitor and has been derived from the main currents flowing inside the calculable capacitor and the voltage drops caused by these currents...
The frequency dependence of air capacitors in the range of 20 kHz to 1 MHz was determined by measuring inductance and capacitance values at the reference frequency of 1 kHz and calculating the frequency dependence of the capacitance. An equivalent circuit in three-terminal configuration was chosen in order to increase the precision of the model. Measurements were performed on air capacitors of the...
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