Brief description of the impedance-resonance method - electromagnetic resonance spectroscopy

This work examines the operating principle of the impedance resonance sensor, which is based on generating an alternating electromagnetic field in the area where the test sample is located. The electromagnetic field acts as an intermediary between the resonant circuit and the sample, capturing changes caused by the sample’s physical properties. Under the influence of the external alternating field, the sample generates linear and eddy conduction currents, displacement currents, and ionic currents, which distort the original electromagnetic field. These distortions are detected by the solenoid of the resonant circuit, enabling the identification of the electrical characteristics of the material under study. The described principle provides a non-contact method of analysis and expands the functional capabilities of impedance resonance sensors.