Broadband absorber of electromagnetic radiation

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Abstract

An absorber of electromagnetic waves of a gradient type has been obtained using carbon fiber felt “Karbopon-V22M” with the following characteristics: reflection coefficient from -10 to -30 dB in the frequency range from 2 to 18 GHz, bending stress and tensile stress ≥ 300 MPa (deformation percentage -0.7%); density ≤ 2.5 g/cm3, thickness ≤ 6 mm. The prospects of using the created radio-absorbing material for concealing large-sized moving or stationary objects located underneath from radar detection systems, as well as for protecting electronic equipment, information carriers and biological objects from increased levels of electromagnetic radiation, localization of electromagnetic radiation are shown.

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About the authors

V. A. Bogush

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

V. A. Labunov

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

A. V. Gusinsky

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

V. A. Karpovich

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

V. N. Rodionova

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Author for correspondence.
Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

N. A. Pevneva

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

M. M. Kasperovich

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

I. A. Kashko

Belarusian State University of Informatics and Radioelectronics (BSUIR)

Email: valent-r@yandex.by
Belarus, Petrusya Brovki str., 6, Minsk, 220013

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Supplementary files

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2. Fig. 1. Structure of carbon fibre felt (scanning electron microscopy, magnification ×1500 (a) and ×200 (b)).

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3. Fig. 2. Photograph of the Carbopon V22-M carbon fibre felt

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4. Fig. 3. Photograph of a dielectric layer impregnated with a 20% solution of iron oxide Fe3O4.

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5. Fig. 4. Reflection coefficient characteristics of experimental samples 1-3 of carbon nonwoven materials annealed at different temperatures in the range of 2...4 GHz when placed on a metal screen.

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6. Fig. 5. Reflection coefficient characteristics of the experimental sample of carbon fibre felt modified with 20% Fe3O4 iron oxide solution with particle diameter from 1 to 5 μm in the frequency ranges 2...4 GHz (a) and 4...18 GHz (b).

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7. Fig. 6. Reflection coefficient characteristics of modified fibreglass.

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8. Fig. 7. Characteristic of the reflection coefficient of the experimental sample RPM EMI in the frequency range of 0.8...18 GHz.

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