Solid materials microwave dielectric properties: features of methods practical use

Features of methods practical use for material dielectric properties measurement in different (factory and metrological) laboratories and influence of above mentioned features on measurements results are considered. Results are obtained by Obninsk Research and Production Enterprise “Technologiya” A. G. Romashin radiophysics laboratory and by East-Siberian branch Federal State Unitary Enterprise “Russian metrological institute of technical physics and radio engineering” department of radio engineering measurements. Results of microwave permittivity and loss tangent solid materials measurements are analysed. This investigation made it possible to get additional information about features of standard methods practical use for material dielectric properties measurement, which was absent in literature earlier. In laboratories for measurements used the waveguide resonator and the standardized techniques. The factory laboratory applied a measurement method at the fixed frequency with control in a resonance movement of the plunger, and in metrological laboratory a measurement method with the fixed length of the resonator and measurement at resonant frequencies. Results of measurements showed good reproducibility of results for samples that are meeting method requirements. It was revealed reducing reproducibility of measurements of hygroscopic, heterogeneous samples and in the case of nonobservance of diameter method requirements. Obtained results can be applied for reproducibility improvement of dielectric properties measurements in practical use of considered methods.

1. Egorov V. N. Resonance methods for microwave studies of dielectrics (Review). Instruments and Experimental Techniques, 50, 143–175 (2007). https://doi.org/10.1134/S0020441207020017

2. Krylov V. P. Accounting of errors of definition of dielectric permeability by method of the waveguide resonator. Metrologiya, (5), 33–36 (1994). (In Russ.)

3. Egorov V. N., Kashchenko M. V., Onkhonov R. R. The accuracy of dielectric measurements in a cylindrical cavity H01p resonator. Measurement Techniques, 46(10), 972–978 (2003). https://doi.org/10.1023/B:METE.0000010787.49804.c6

4. Litovchenko A. V. Features of a technique of processing of results of exact measurements ε and tgδ on the microwave oven when heating a sample. Zavodskaya laboratoriya. Diagnostika materialov, 70(4), 31–36 (2004). (In Russ.)

5. Li E., Nie Z., Guo G., Zhahg Q. Broadband measurements of dielectric properties of low-loss materials at high temperatures using circular cavity method. Progress In Electromagnetics Research, 92, 103–120 (2009). https://doi.org/10.2528/PIER09030904

6. Fomin D. G., Dudarev N. V., Darovsky S. N. Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths. Zhurnal Radioelektroniki – Journal of Radio Electronics, 6, 1–12 (2021). (In Russ.) https://doi.org/10.30898/1684-1719.2021.6.6

7. Severo S. L. S., de Salles A. A. A., Nervis B., Zanini B. K. Non-resonant permittivity Measurement methods. Journal of Microwaves, Optoelectronics and Electromagnetic Applications, (1), 297–311 (2017). https://doi.org/10.1590/2179-10742017v16i1890

8. Weir W. B. Automatic measurement of complex dielectric constant and permeability at microwave frequencies. Proceedings of IEEE, (1), 3–36 (1974). https://doi.org/10.1109/PROC.1974.9382

9. Krylov V. P. Study of the relationship between the intrinsic Q-factor of a volumetric wave resonator and the error in determining the dielectric constant of a material. Industrial laboratory. Diagnostics of materials, 89(4), 45–49 (2023). (In Russ.) https://doi.org/10.26896/1028-6861-2023-89-4-45-49

10. Krylov V. P. Determination of the permittivity of materials in a volume resonator with allowance for the surface roughness. Industrial laboratory. Diagnostics of materials, 87(5), 43–46 (2021). (In Russ.) https://doi.org/10.26896/1028-6861-2021-87-5-43-46

11. Kharitonov D. V., Tychinskaya M. S., Anashkina A. A. et al. Ceramic materials for aviation and space: textbook. Mendelеev Russian Chemical Technology University Publ., Moscow (2022).