Abstract
A method of manufacturing a polyethylene – expanded carbon – polyethylene layered structures which allows thin (down to 90 μm) and flexible sandwiches to be easily made, is suggested. The electromagnetic properties of the manufactured composite materials at frequencies from 1 MHz to 3 GHz, 26–37.5 GHz, and 0.1–1.4 THz are analyzed. It is established that the material so obtained is opaque for the Ka microwave band due to high reflectivity (96–97%), does not transmit electromagnetic radiation of the terahertz range, has a high conductivity (up to 1 S/m) in the frequency range from 1 MHz to 1 GHz, and retains the main physical polyethylene properties (light weight, elasticity, and flexibility).
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