Method for Сalculating the Geometric Characteristics of the Biological Protection Screen for Radar Stations


Annotation:

Protection of radar stations personnel and equipment from electromagnetic radiation is of great practical importance. Its key element is a special biological protection screen that prevents radiation from entering the protected area or significantly reduces the level of the electromagnetic field in it. Today, despite a significant number of works devoted to the problem of engineering protection from radiation exposure and the creation of new effective structures and materials for protective screens, both in our country and abroad, there is no single method that allows to determine the geometric characteristics of the protective screen based on data on the configuration and parameters of the radar station. This method should be based not only on the analysis of the beam path in the approximation of geometric optics, but also take into account the diffraction effects at the edge of the screen, which lead to the penetration of electromagnetic radiation into the zone of its geometric shadow. Moreover, the diffraction effects, taking into account the sufficiently large wavelengths of radiation from the radio range and the distances between the screen and the protected structures, will be a significant factor in terms of radio wave propagation, which cannot be ignored when designing protective screens.

The method for calculating the geometric characteristics of biological protection screens from electromagnetic radiation from radar stations is considered in the article. At its first stage, the energy flux density in the protected zone is determined in the absence of a biological protection screen for subsequent comparison with the maximum permissible levels regulated by sanitary rules and norms. 

The thickness of the protective screen and the material from which it should be made, the geometric characteristics of the screen, and the influence of diffraction phenomena on these characteristics are shown. The characteristics of biological protection screens were calculated considering the requirements for the level of electromagnetic radiation in the protected area.

References:
  1. Andryushchenko M.S., Gusakovskiy V.E., Shtager E.A., Shtager D.E., Shchesnyak S.S. Calculation methods for protecting electronic systems from electromagnetic radiation: monograph. Saint-Petersburg: Izd-vo VVM, 2016. 310 p. (In Russ.).
  2. Gizatullin Z.M. Noise immunity of computer facilities inside the building at broadband electromagnetic influences. Kazan: Izd-vo KGTU, 2012. 254 p. (In Russ.).
  3. Andryushchenko M.S., Gorodetskiy B.N., Shtager E.A. The problem of protecting ground objects from an electromagnetic pulse based on the foreign press data. Voprosy oboronnoy tekhniki. Ser. 16. Tekhnicheskie sredstva protivodeystviya terrorizmu = Military Enginery. Scientific and Technical Journal. Counter-terrorism technical devices. Iss. 16. 2014. № 9–10 (75–76). pp. 49–55. (In Russ.).
  4. Remez V.P. Radiation shielding system. Patent RF. № 2696980. Applied: May 3, 2018. Published: August 8, 2019. (In Russ.).
  5. Zagovenev V.N., Altunin V.I., Didenko A.V., Gusarov A.A., Alekseenko I.B. Protective masking screen. Patent RF. № 2476810. Applied: March 31, 2009. Published: October 10, 2010. Bulletin № 28. (In Russ.).
  6. Kovalenko V.N. Radar absorbing protection screen. Patent RF. № 109335. Applied: June 22, 2011. Published: October 10, 2011. (In Russ.).
  7. Cellozzi S., Araneo R., Lovat G. Electromagnetic Shielding. New York: IEEE Press, 2014. 355 p.
  8. Vass S. Defense against electromagnetic pulse weapons. Atlantic Association for Research in the Mathematical Sciences (AARMS). 2004. Vol. 3. № 3. pp. 443–457.
  9. Tong C. Advanced materials and design for board level EMI shielding. Schaumburg: Laird Technologies, 2012. 33 p.
  10. Joly J.C., Serafin D.J. High Power Electromagnetic Effects: Methodology and Associated Tools. Available at:  http://www.ursi.org/proceedings/procGA02/papers/p0432.pdf (accessed: March 2, 2020).
  11. Muromtsev D.Yu., Zyryanov Yu.T., Fedyunin P.A., Belousov O.A., Ryabov A.V., Golovchenko E.V. Electrodynamics and radio wave propagation: textbook. Moscow: Lan, 2014. 448 p. (In Russ.).
  12. Nikolskiy V.V., Nikolskaya T.M. Electrodynamics and radio wave propagation. Moscow: Nauka, 1989. 544 p. (In Russ.).
  13. SanPiN 2.2.4/2.1.8.055—96. Electromagnetic radiation of the radio frequency range (EMI RCh). Available at:  http://www.vashdom.ru/sanpin/224_218055-96/ (accessed: March 2, 2020). (In Russ.).
  14. Savelev I.V. General physics course: textbook. In 3 volumes. Vol. 2. Electricity and magnetism. The waves. Optics. 3-e izd., ispr. Moscow: Nauka, 1988. 496 p. (In Russ.).
  15. Born M., Volf E. The basics of optics. Moscow: Nauka, 1973. 720 p. (In Russ.).
  16. Landsberg G.S. Optics: textbook for universities. 6-e izd., ster. Moscow: Fizmatlit, 2003. 848 p. (In Russ.).
  17. Strakhov S.Yu., Matveev S.A., Sotnikova N.V. The use of the Cornu spiral for analyzing energy flux density of electromagnetic radiation in the geometric shadow region when designing protective screens. Opticheskiy zhurnal = Journal of Optical Technology. 2020. Vol. 87. № 4. pp. 78–84. (In Russ.). DOI: 10.17586/1023-5086-2020-87-04-78-84
DOI: 10.24000/0409-2961-2020-7-26-31
Year: 2020
Issue num: July
Keywords : electromagnetic radiation плотность потока энергии radar station biological protection screen
Authors:
  • Strakhov S.Yu.
    Strakhov S.Yu.
    Dr. Sci. (Eng.), Head of Department, strakhov_s@mail.ru Baltic State Technical University VOENMEH, Saint-Petersburg, Russia
  • Sotnikova N.V.
    Sotnikova N.V.
    Cand. Sci. (Eng.), Assoc. Prof. Baltic State Technical University VOENMEH, Saint-Petersburg, Russia
  • Strakhova A.S.
    Strakhova A.S.
    Undergraduate Saint Petersburg Electrotechnical University «LETI», Saint-Petersburg, Russia