A.S. Mazinov1, N.A. Boldyrev2, A.A. Marendich3, A.V. Starosek4

1–4 V.I. Vernadsky Crimean Federal University (Republic of Crimea, Simferopol, Russia)

1mazinovas@cfuv.ru, 2kolyaboldyrev@gmail.com, 3marendic0111@gmail.com, 4starosekav@cfuv.ru

The problem of development of thin planar coatings for controlling the backscattering pattern is an actual one, and is necessary to reduce the specular reflection of electromagnetic waves. Classic absorbing coatings have significant thickness, limiting their application. A promising alternative is application of thin metasurfaces capable of spatially redistributing the energy of an incident wave. The aim of this work was a comprehensive study of the angular dependence of the scattering pattern and the phenomenon of anomalous scattering for a metasurface based on a planar array of triangular spiral resonators in the 16–25 GHz range. As a result of numerical modeling and experimental studies, it was found that the key operating mechanism of the structure is the excitation of transverse field components and the formation of a system of secondary emitters due to the asymmetry of surface currents. At the resonant frequency of 18.7 GHz, suppression of the normal component of the reflected field down to –40.5 dB was achieved. It is shown that the metasurface forms anomalous side lobes, redirecting energy toward the incident wave, at characteristic incidence angles of ±23° and ±52°. The obtained results demonstrate the promise of using such structures for creating controllable scattering coatings with low thickness and cost, which can be applied to the development of low-reflectance K-band coatings and solving electromagnetic compatibility problems.

Mazinov A.S., Boldyrev N.A., Marendich A.A., Starosek A.V. Influence of incidence angle on anomalous angular scattering from a metasurface. Electromagnetic waves and electronic systems. 2026. V. 31. № 3. P. 61−67. DOI: https://doi.org/10.18127/j15604128-202603-07 (in Russian)

1. Ahmad H., Tariq A., Shehzad A., Faheem M.S., Shafiq M., Rashid I.A., Afzal A., Munir A., Riaz M.T., Haider H.T., Afzal A., Qadir M.B., Khaliq Z. Stealth technology: Methods and composite materials – A review. Polymer Composites. 2019. V. 40. № 12. P. 4457–4472. DOI 10.1002/pc.25311.
2. Chen H.-T., Taylor A.J., Yu N. A review of metasurfaces: physics and applications. Reports on Progress in Physics. 2016. V. 79. № 7. P. 076401. DOI 10.1088/0034-4885/79/7/076401.
3. Semenikhin A.I., Semenikhina D.V., Yukhanov Yu.V., Blagovisny P.V., Ilyin I.V. Experimental and numerical investigations of backscatter patterns of the blocks of masking digital two-bit meta-covers. Izvestia of higher educational institutions of Russia. Radio electronics. 2021. V. 24. № 4. P. 57–67. DOI 10.32603/1993-8985-2021-24-4-57-67. (in Russian)
4. Liu S., Ma Z., Pei J., Jiao Q., Yang L., Zhang W., Li H., Li Y., Zou Y., Tan X. A review of anomalous refractive and reflective metasurfaces. Nanotechnology and Precision Engineering. 2022. V. 5. № 2. P. 025001. DOI 10.1063/10.0010119.
5. Mazinov A.S.A., Padalinsky M.M., Boldyrev N.A., Starosek A.V. Simulation of scattering properties of modular metasurfaces in the
   16-25 GHz range and comparison with experimental results. Proceedings of the Saratov University. A new series. Series: Physics. 2023. V. 23. № 2. P. 102–111. DOI 10.18500/1817-3020-2023-23-2-102-111. (in Russian)
6. Boldyrev N.A., Fitaev I.Sh., Padalinsky M.M., Poletaev D.A., Mazinov A.S. The possibility of attenuation of the main lobe of the reflected wave by means of a spiral triangular metastructure. Bulletin of the Voronezh State Technical University. 2024. V. 20. № 2. P. 116–123. DOI 10.36622/1729-6501.2024.20.2.018. (in Russian)
7. Kostylev V.I., Zvyagin D.V. Types of measuring radio engineering systems. Bulletin of the Voronezh Institute of the Ministry of Internal Affairs of Russia. 2009. № 3. P. 88–92. (in Russian)
8. Amin M., Fida A., Rashid A., Siddiqui O., Tahir F.A. Anti-reflecting metasurface for broadband polarization independent absorption at Ku band frequencies. Scientific Reports. 2022. V. 12. № 1. P. 20073. DOI 10.1038/s41598-022-24691-8.
9. Wang J., Guan J., Wang X., Saer A., Tong X., Guo Y., Ma S. Design of composite stealth cloak based on anomalous reflections and vortex singularities. Results in Physics. 2024. V. 64. P. 107909. DOI 10.1016/j.rinp.2024.107909.
10. Mazinov A.S., Boldyrev N.A., Vasilchenko V.M., Starosek A.V. Attenuation of reflected UHF wave by planar metamaterial structure with the addition of an active absorbing thin film layer. Electromagnetic waves and electronic systems. 2024. V. 29. № 6. P. 64−69. DOI 10.18127/j15604128-202406-08. (in Russian)
11. Sorathiya V., Lavadiya S., Parmar B., Das S., Krishna M., Faragallah O.S., Baz M., Eid M.M.A., Rashed A.N.Z. Numerical investi-gation of the tunable polarizer using gold array and graphene metamaterial structure for an infrared frequency range. Applied Physics B: Lasers and Optics. 2022. V. 128. № 1. DOI 10.1007/s00340-021-07731-5.