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
[...]
