vestiftИзвестия Национальной академии наук Беларуси. Серия физико-технических наукProceedings of the National Academy of Sciences of Belarus. Physical-technical series1561-83582524-244XThe Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8358-2022-67-4-360-369vestift-763Research ArticleМАТЕРИАЛОВЕДЕНИЕ, МЕТАЛЛУРГИЯMATERIALS SCIENCES AND ENGINEERING, METALLURGYГетерогенные радиопоглощающие композиционные материалы на основе порошкообразных углей для защиты приборов электронной техники от воздействия электромагнитных помехHeterogeneous radio absorbing composite materials based on powdered charcoals for electronic devices protection from the electromagnetic radiation impactБойправО. В.BoipravO. V.

Бойправ Ольга Владимировна – кандидат технических наук, доцент, доцент кафедры защиты информации

ул. П. Бровки, 6, 220013, Минск

Olga V. Boiprav – Ph. D. (Engineering), Associate Professor, Associate Professor of the Information Protection Department

6, P. Brovka Str., 220013, Minsk

smu@bsuir.byБелоусоваЕ. С.BelousovaE. S.

Белоусова Елена Сергеевна – кандидат технических наук, доцент, доцент кафедры защиты информации

ул. П. Бровки, 6, 220013, Минск

Elena S. Belousova – Ph. D. (Engineering), Associate Professor, Associate Professor of the Information Protection Department

6, P. Brovka Str., 220013, Minsk

belousova@bsuir.byБордиловскаяД. В.BordilovskayaD. V.

Бордиловская Даниэла Владиславовна – студент кафедры защиты информации

ул. П. Бровки, 6, 220013, Минск

Daniela V. Bordilovskaya – Student of the Information Protection Department

6, P. Brovka Str., 220013, Minsk

daniela.bordilovskaya@gmail.comБелорусский государственный университет информатики и радиоэлектроникиBelarusian State University of Informatics and Radioelectronics202202012023674360369Copyright © Бойправ О.В., Белоусова Е.С., Бордиловская Д.В., 20232023Бойправ О.В., Белоусова Е.С., Бордиловская Д.В.Boiprav O.V., Belousova E.S., Bordilovskaya D.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestift.belnauka.by/jour/article/view/763

Представлены результаты теоретического и экспериментального обоснований разработанной авторами методики изготовления гетерогенных (двух- или трехслойных) радиопоглощающих композиционных материалов на основе порошкообразных углей. Методика основана на послойной заливке в формы смесей гипсового связующего вещества и порошкообразного угля (березового неактивированного, березового активированного, кокосового активированного) в очередности, при которой наружный (относительно фронта распространения электромагнитного излучения) слой композиционного материала характеризуется наименьшим волновым сопротивлением, а внутренний – наибольшим волновым сопротивлением. Указанная очередность определена по результатам теоретического обоснования разработанной методики. В ходе ее экспериментального обоснования установлены закономерности изменения значений коэффициентов отражения и передачи электромагнитного излучения изготовленных материалов в зависимости от значения частоты этого излучения в диапазоне 0,7–17,0 ГГц. Исходя из установленных закономерностей констатировано, что минимальное значение коэффициента отражения электромагнитного излучения изготовленных согласно разработанной и обоснованной методике двуслойных материалов (толщина ~ 5,0 мм) составляет –12,0 ± 1,0 дБ и соответствует частотам электромагнитного излучения 0,8 и 2,6 ГГц (при условии, если такие материалы закреплены на металлических подложках). Минимальное значение коэффициента отражения электромагнитного излучения полученных трехслойных материалов (толщина ~ 10,0 мм) при указанном условии также составляет –12,0 ± 1,0 дБ и соответствует частотам электромагнитного излучения 4,5 и 6,0 ГГц. Значения коэффициента передачи электромагнитного излучения таких материалов уменьшаются со средним шагом 4,0 дБ по мере увеличения на 1,0 ГГц частоты этого излучения в диапазоне 2,0–10,0 ГГц и увеличиваются с аналогичным шагом по мере увеличения на 1,0 ГГц частоты в диапазоне 10,0–17,0 ГГц. Минимальное значение составляет –30,0 ± 2,0 дБ. Изготовленные согласно разработанной и обоснованной методике материалы представляются перспективными для обеспечения защиты приборов электронной техники от воздействия электромагнитных помех (как активного, так и пассивного типов).

The results of theoretical and experimental substantiation of the technique developed by the authors for the manufacture of heterogeneous (two- or three-layer) radio absorbing composite materials based on powdered charcoals are presented. The technique is based on layer-by-layer pouring of mixtures of a gypsum binder and powdered charcoal (non-activated birch, activated birch, activated coconut) into molds in the order in which the outer (relative to the electromagnetic radiation propagation front) layer of the composite material is characterized by the lowest wave resistance, and the inner layer is characterized by the highest wave resistance. The specified order is determined by the results of the theoretical substantiation of the developed technique. In the course of its experimental substantiation, regularities for changing the electromagnetic radiation reflection and transmission coefficients values of the manufactured materials depending on the value of the radiation frequency in the range of 0.7–17.0 GHz have been established. Based on the established regularities, it was stated that the minimum value of the electromagnetic radiation reflection coefficient of the two-layer materials manufactured according to the developed and substantiated technique (thickness ~ 5.0 mm) is –12.0 ± 1.0 dB and corresponds to electromagnetic radiation frequencies of 0.8 and 2.6 GHz (it’s provided, when such materials are fixed on metal substrates). The minimum value of the electromagnetic radiation reflection coefficient of the three-layer materials (thickness ~ 10.0 mm) under the specified condition is also –12.0 ± 1.0 dB and corresponds to electromagnetic radiation frequencies of 4.5 and 6.0 GHz. The electromagnetic radiation transmission coefficient values of such materials decrease with an average step of 4.0 dB as the frequency of the radiation increases by 1.0 GHz in the range of 2.0–10.0 GHz and increase with a similar step as the frequency increases by 1.0 GHz in the range of 10.0–17.0 GHz. The minimum value is –30.0 ± 2.0 dB. The materials manufactured according to the developed and substantiated technique seem to be promising for ensuring the protection of electronic devices from the effects of electromagnetic interference (both active and passive types).

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The authors declare that there are no conflicts of interest present.