The Shielding Effectiveness of a Magnetic Fluid in Radio Frequency Range

• Authors: B. Dolník , M. Rajňák , R. Cimbala , I. Kolcunová , J. Kurimský , J. Džmura , J. Petráš , J. Zbojovský , M. Kosterec , P. Kopčanský , M. Timko
• Languages of publication: EN

Abstracts

EN

This article builds on the previous work and describes the interaction of transformer oil-based magnetic fluid (MF) with the radio frequency (RF) magnetic near-field. Three prepared samples of the MF used as a barrier to magnetic near-field, consist of transformer oil and dispersed magnetite nanoparticles coated with oleic acid. We pay attention to the important area related to the electromagnetic field shielding by the MF. Such sample of the MF may be a good candidate for applications where it is necessary to simultaneously electrically isolate, remove the excess of heat and to shield electromagnetic interference (EMI). We present a method for the determination of shielding effectiveness (SE) of the MF under RF excitation conditions ranging from 500 MHz to 3 GHz. We report the effect of magnetic volume fraction in the MF and the effect of the sample thickness on the SE.

Keywords

EN

41.20.Jb; 41.20.Gz; 75.50.Mm; 81.70.Ex; 07.50.Hp

Discipline

• 41.20.Jb: Electromagnetic wave propagation; radiowave propagation(for light propagation, see 42.25.Bs; for electromagnetic waves in plasma, see 52.35.Hr; for atmospheric, ionospheric, and magnetospheric propagation, see 92.60.Ta, 94.20.Bb, and 94.30.Tz, respectively; see also 94.05.Pt Wave/wave, wave/particle interactions, in space plasma physics)
• 07.50.Hp: Electrical noise and shielding equipment
• 81.70.Ex: Nondestructive testing: electromagnetic testing, eddy-current testing
• 75.50.Mm: Magnetic liquids
• 41.20.Gz: Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 585-587

Dates

published

2018-03

Contributors

author

B. Dolník

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

M. Rajňák

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia
• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

R. Cimbala

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

I. Kolcunová

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

J. Kurimský

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

J. Džmura

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

J. Petráš

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

J. Zbojovský

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

M. Kosterec

• Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia

author

P. Kopčanský

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

M. Timko

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

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Identifiers

DOI

10.12693/APhysPolA.133.585