PDF Печать E-mail


DOI: https://doi.org/10.15407/techned2018.04.014

A THIN ELECTROMAGNETIC SHIELD OF A COMPOSITE STRUCTURE MADE ON THE BASIS OF A MAGNETIC FLUID

Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Science of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue No 4, 2018 (July/August)
Pages 14 – 18

 

Authors
V.A.Glyva1, A.D.Podoltsev2*, B.V.Bolibrukh3, A.V.Radionov4
1 – National Aviation University,
Kosmonavta Komarova ave., 1, Kyiv-58, 03058, Ukraine
2 – Institute of Electrodynamics National Academy of Sciences of Ukraine,
pr. Peremohy, 56, Kyiv, 03057, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
3 – Lviv Polytechnic National University,
Stepana Bandery, 12, Lviv, 79013, Ukraine
4 – SIIE "Ferrohydrodynamica",
B. Morskaya str., 45/5, Mykolayiv, 54030, Ukraine
* ORCID ID : http://orcid.org/0000-0002-9029-9397

 

Abstract

A thin electromagnetic shield (0.25 – 0.50 mm thick) were developed, which has a composite structure and was made on a magnetic fluid deposited on a dielectric substrate. Experimental researches of its shielding and electromagnetic properties were carried out. It is shown that the screening coefficient of a low-frequency magnetic field for such a screen is 2.4 – 7.8. The screening coefficient for an ultrahigh-frequency magnetic field is 3.0 – 9.3. The values of these coefficients depend on the thickness of the screen. The calculation-experimental method is proposed for the determine of the effective magnetic permeability of the composite screen material. This method is using the well-known analytical solution of the magnetostatic problem for a thin spherical shell and the results of measuring screening coefficients for a screen of spherical (or nearly spherical) shape. The obtained relative values of the magnetic permeability of the material for the case of a low-frequency magnetic field are 420 – 1050. These values depend little on the thickness of the screen. References 10, figures 2, tables 2.

 

Key words: electromagnetic screen, composite material, magnetic fluid, screening coefficient, effective magnetic permeability.

 

Received:    06.03.2018
Accepted:   03.04.2018
Published:

 

References

1. Levchenko O.G. Levchuk V.K., Timoshenko O.N. Shielding materials and means of individual protection of the welder from magnetic fields. Avtomaticheskaia svarka. 2011. No 3. Pp. 49–55. (Rus)
2. Patil N., Velhal N. Pawar R. Puri V. Electric, magnetic and high frequence properties of screen printed ferrite-ferroelectric composite thick films on alumina substrate. Microelectronics International. 2015. Iss. 32(1). Pp. 25–31.
3. Kasar V., Pawar A. Novel Approach to Electromagnetic Interference Shielding for Cell Phones. International Journal of Science and Research. 2014. Iss. 3. Pp. 1869–1872.
4. Singh J. Computer Generated Energy Effects on Users and Shielding Interference. International Journal of Innovative Research in Computer and Communication Engineering. 2015. Iss.3. Pp. 10022–10027.
5. Fionov A.S., Yurkov G.Y., Popko O.V., Kosobudskii I.D., Taratanov N.A., Potemkina O.V. Polymer nanocomposites: synthesis and physical properties. Advances in Composite Materials or Medicine and Nanotechnology. Rijeka, Croatia: IN-TECH Education and Publishing, 2011. Pp. 343–364.
6. Taranov N.V., Yurkov G.Yu., Kosobudsky I.D. Synthesis of rhenium-containing nanoparticles on the surface of polytetrafluoroethylene microgranules. Vestnik Saratovskogo gosudarstvennogo tekhnicheskogo universiteta. 2010. No 44. Pp. 95-101. (Rus)
7. Bogush V.A., Borbotko T.V., Nasonov N.V. Electromagnetic radiation screens based on magnetic materials. Technologies. Constructions. Application. Minsk: Bestprint. 2016. 222 p. (Rus)
8. Glyva V., Lapshin O., Kovalenko V., Khudik M. Investigation of protective properties of electromagnetic screens based on finely divided iron and its compounds. Visti Donetskoho girnychoho instytutu. 2017. No 1(40). Pp. 123 – 127. (Ukr)
9. Podoltsev A. Kucheryava I. Multiscale modeling in electrical engineering. Kiev: Institute of elektrodynamics NAS of Ukraine. 2011. 256 p. (Ukr)
10. Jackson J. Classical Electrodynamics. Moskva. Mir, 1965. 702 p.