AUTOMATION OF DESIGNING COMPOSITE ELECTROMAGNETIC SCREENS OF SPECIFIED EFFICIENCY
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Abstract
Relevance. Shielding is the most effective means of improving electromagnetic safety for people and electromagnetic compatibility for electronic equipment. Only composite materials can control the protective properties (ratio of reflection, absorption and transmission coefficients) of electromagnetic waves. However, designing materials with the required protective properties is complex and requires large amounts of calculations. This makes it expedient to automate these processes by creating application software. The aim of this work is to automate the design processes of composite materials with controllable protective properties. Research results. Mathematical functions are provided to determine the effectiveness of electromagnetic radiation shielding by reflection and absorption of electromagnetic waves. It is shown that it is advisable to use fundamental relations of electrodynamics of continuous media to automate the design processes of composite protective materials. A list of theoretical and experimental data necessary for the design of protective materials is determined. Applied software has been developed that allows obtaining data on the effectiveness of electromagnetic radiation shielding by reflection and absorption of electromagnetic waves depending on the electrophysical parameters of the composite components and the volume content of the electrically conductive filler in the dielectric matrix. Using the example of a silicate material with a granulated copper filler, dependencies of the effectiveness of shielding ultra-high frequency electromagnetic radiation on the filler content were obtained. A comparison of the obtained data with the experiment shows their acceptable convergence. To accelerate the design of protective materials, a generalised function of the dependence of the electrical conductivity of the composite on the filler content was obtained. This allows reducing the amount of experimental work to obtain the initial data. Conclusions. The creation of application software for automating the design processes of composite materials allows optimising the effectiveness of protective materials by selecting the most acceptable components and the content of electrically conductive material in the dielectric matrix.
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