E.S. Belousova1, O.V. Boiprav2, S.E. Savanovich3

1–3 Belarusian state university of informatics and radioelectronics (Minsk, Belarus)

1 belousova@bsuir.by, 2 smu@bsuir.by, 2 svetasav@bsuir.by

The authors of this article studied the influence of hemispherical geometric inhomogeneities in the surface of absorbers on the reflection of electromagnetic radiation. Manufacturing technology of charcoal-containing electromagnetic radiation absorbers with hemispherical geometric inhomogeneities are presented in article. Such absorbers are made of polyurethane mastic and activated carbon (activated charcoal or coconut carbon). Hemispherical geometric irregularities with a diameter 15–25 mm were selected. Experimental studies in the frequency range 2–17 GHz shows that electromagnetic radiation absorbers with hemispherical geometric inhomogeneities with a diameter 15 mm have a value of reflection coefficients near –10… –16 dB (with activated charcoal) or –11… –21 dB (with coconut activated carbon) in the frequency range 5–12 GHz and transmission coefficients less –10 dB (with activated charcoal) or less –8 dB (with coconut activated carbon) in the same frequency range. Such electromagnetic radiation absorbers are recommended for using in designing anechoic chambers or performing measurements in the microwave range.

Belousova E.S., Boiprav O.V., Savanovich S.E. Charcoal-containing electromagnetic radiation absorbers with hemispherical geometric inhomogeneities. Electromagnetic waves and electronic systems. 2024. V. 29. № 2. P. 22−29. DOI: https://doi.org/10.18127/ j15604128-202402-03 (in Russian)

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