Microwave and infrared electromagnetic shields based on aluminum-containing polymer film

The technology of development microwave and infrared electromagnetic shields based on double-layer metalized polymer film and synthetic non-woven fibrous material is proposed. This technology consists in heat pressing of the construction, which is two fragments of the said fibrous material, between which fragments of the said film are uniformly distributed. The characteristics of electromagnetic radiation absorption and reflection in the frequency range of 0.7–17.0 GHz of the shields samples of various types developed in correspondence with the proposed technology are presented. The sample of each type differed in the number of fragments of double-layer metalized polymer film included in their composition (namely, the ratio between the total area of surface areas covered with double-layer metalized polymer film fragments and the total area of surface areas not covered with such fragments). In addition, the results of assessing the change in temperature of the front and back surfaces of the shields samples of each type as a result of the impact of infrared electromagnetic radiation on the first of the said surfaces are presented. It was found that electromagnetic shields developed in correspondence with the proposed technology are multi-band electromagnetic radiation absorbers in the frequency range of 1.6–17.0 GHz, which is their key advantage over their analogues. Such shields could be used for selection in the rooms zones for standing equipment sensitive to the microwave and thermal noise.