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Helical resonator for measurements of dielectrics

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The frequency of operation selected for a presented resonator was imposed by lack of sufficient measurement methods in the range of 10 - 50 MHz. Furthermore signals of 20 - 30 MHz are intensively used in many areas of science and technology like electronics, medicine, biology, geoscience and physics. The knowledge of complex permittivity εr = εr’(1 - jtgδ) and its changes caused by elusive effects appearing in the development and manufacturing process is critical in quality control and optimization of material composition and production process of electronic materials [1]. Capacitive and transmission line methods used today give accuracy of several percent at most [1] what becomes insufficient in modern material applications. That is why this project is foc[...]

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