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With increasing electronic equipment complexity and miniaturization, the problem solution of ensuring electromagnetic compatibility has become essential, since electromagnetic interference occurring inside electronic units can significantly reduce their reliability and performance. The effect of radio absorbing materials (RAM) characteristics on the electromagnetic compatibility of electronic unit parameters of electronic equipment was studied in this work. A comparative review of RAM was carried out. To minimize the level of intrinsic electromagnetic interference the material based on red iron oxide pigment 40 % + Fe3O4 20 % was selected. The simulation and electromagnetic environment analysis of the electronic unit were implemented with the key RAM characteristics applied. The key RAM characteristics included reflection coefficient, absorption coefficient, and dependence on the frequency range. It was found that the use of RAM based on red iron oxide pigment 40 % + Fe3O4 20 % with a high absorption coefficient allows the interference value reduction by 350 mV at frequencies from 1 to 1.5 GHz, and by 150 mV at frequencies from 2.5 to 3 GHz. The RAM based on red iron oxide pigment 40 % + Fe3O4 20 % has allowed to reduce the level of electromagnetic interference significantly. In addition, it provides the electronic unit electromagnetic environment stabilization.

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