A bridge for the measurement of permittivity
- 1 November 1956
- journal article
- Published by Institution of Engineering and Technology (IET) in Proceedings of the IEE - Part B: Radio and Electronic Engineering
- Vol. 103 (12) , 704-707
- https://doi.org/10.1049/pi-b-1.1956.0236
Abstract
A description is given of a null method for the measurement of the complex permittivity of dielectrics. The direct admittance of a 3-terminal capacitor with the sample as dielectric is measured as a complex capacitance, the two components being indicated directly on two 3-terminal variable air capacitors. In addition to these the bridge network comprises transformer ratio-arms and an amplifier whose output voltage is in quadrature with that of the transformer. The bridge operates at ten fixed frequencies from 30 to 106 rad/sec.Keywords
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