V.P. Krylov1, R.A. Chirkov2

1,2 OJSC “Obninsk Research and Production Enterprise “Technology” named after A. G. Romashin (Obninsk, Kaluga’s region, Russia)

1,2 info@technologiya.ru

Statement of a problem. Methods of measurement of the reflected wave on flat plates in free space are developed for definition of frequency dependences of permittivity of materials. At the theoretical description of an algorithm of definition of permittivity on reflection coefficient when falling a wave on a plate at an angle of Brewster there is no dependence of accuracy of measurement of permittivity on thickness on frequency, but at experimental realization of this method frequency dependence of accuracy of definition of permittivity comes to light.

Purpose. Consideration of the cause of frequency dependence of accuracy of definition of permittivity on angular dependence of coefficient of reflection when falling a wave at an angle Brewster and establishment of conditions at which observance the potential accuracy of a method increases.

Practical importance. Results of pilot and settlement studies of influence of the superficial intermediate layers giving definitions of dependence of permittivity of a plate to emergence of frequency dependence of accuracy are received and conditions of the choice of discrete frequencies for which the accuracy of definition of permittivity of a plate is higher are established. 

Krylov V.P., Chirkov R.A. Measurement of permittivity of solid dielectrics in free space when falling a wave on a plate at an angle Brewster. Radiotekhnika. 2025. V. 89. № 7. P. 176−182. DOI: https://doi.org/10.18127/j00338486-202507-27 (In Russian)

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