Abstract
Optimization of the radiation coil of the hardware-software complex for studying the effectiveness of shielding of low-frequency electromagnetic radiation will make it possible to assess the effectiveness of shielding coatings at a higher level. This fact will make it possible to develop coatings with improved characteristics. The purpose of this work was to determine the optimal characteristics of the emitting coil which will ensure its stable operation and magnetic field strength in the frequency range up to 100 kHz.The parameters of the manufactured samples, such as inductance (L), active (R) and total resistance (Z), were obtained using an MNIPI E7-20 emittance meter. In practice, the coils with the optimal parameters calculated theoretically were connected to a current source and amplifier. To detect electromagnetic radiation, a multilayer inductor connected to a UTB-TREND 722-050-5 oscilloscope was used as a signal receiver.The results of measurements showed that the resistance of multilayer coils is approximately 1000 times higher than that of single-layer coils. Also, for multilayer coils, an avalanche-like increase in total resistance is observed starting from a frequency of 10 kHz, while for single-layer coils there is a uniform increase in total resistance over the entire frequency range up to 100 kHz.The paper presents results of research on the correlation of the performance of single-layer and multilayer inductors depending on their parameters in the frequency range from 20 Hz to 100 kHz. Values of the voltage required to provide the magnetic field strength of 1, 5, 20 Oe at 25 Hz and 100 kHz have been calculated. After analyzing the data obtained, the optimal parameters of the inductor were found which ensure stable performance in the frequency range up to 100 kHz.
Highlights
A great threat to the security of information on electronic devices, sensitive elements of various devices, biological objects is created by electromagnetic radiation of various nature
At the moment there is no unified method for analyzing the effectiveness of shielding
The proximity effect contributes, the essence of which is that eddy currents arise in the coil wire under the influence of a magnetic field from adjacent turns [10]
Summary
A great threat to the security of information on electronic devices, sensitive elements of various devices, biological objects is created by electromagnetic radiation of various nature. Sources of electromagnetic radiation in everyday life are household appliances, electric vehicles, mobile phones and other electronic devices [1, 2]. To protect against electromagnetic radiation, there are active and passive methods [3]. The passive method is to use screens that absorb or reflect electromagnetic radiation (EMR). With the help of passive screens it is possible to protect certain sensitive elements of the device, and these screens are easy to use and more profitable in economic terms. Most scientific papers consider the effect of low-frequency EMR on living organisms and plants without affecting the analysis of the effectiveness of screens
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