Борьба с электромагнитными волнами: в ТГУ создали радиопоглощающий композит с рекордной шириной диапазона

Scientists at Tomsk State University have developed a multi-component composite capable of absorbing over 90% of electromagnetic radiation (EMI) in the range of 4 to 12 GHz with a thickness of only three millimeters. This was reported by the university's press service.

Electromagnetic radiation from devices at radio frequencies can negatively affect both electronics and people working with equipment. Radio-absorbing materials reduce EMI levels to regulatory values without changing the design of devices. They are applied to the inner walls of devices or used as protective gaskets during assembly.

Dmitry Wagner, Associate Professor at the Department of Radioelectronics of the TSU Faculty of Physics and Technology, noted that traditional ferrite materials effectively operate only in a narrow range, for example, 4–6 GHz. "We managed to expand the absorption band by optimizing the composition and thickness of each layer of the composite," he explained.

The most effective was a two-layer composite, providing high EMI absorption over a wide range of frequencies. A feature of the development is the independent synthesis of all components, including hexaferrites of complex composition and structure, which are not yet in industrial production.

The project was implemented with the support of the Russian Science Foundation, and the results were published in the journal Materials Chemistry and Physics (Q1).

The new composite will allow creating safer electronic devices, reducing the impact of EMI on people and equipment. For industry, this opens up opportunities for application in radar, telecommunications, aircraft construction, and the defense sector.

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