Flexible multilayer electromagnetic radiation absorbers with an ordered structured intermediate layer based on aluminum shavings

A technology for manufacturing low-cost flexible multilayer microwave absorbers is proposed. The low cost of the absorbers is due to the fact that they contain aluminum shavings, which are a production waste. The second layer of the absorbers is made from these shavings. This is realized by forming from it the elements characterized by the same shape and size, and fixing these elements with the same step between the first and third layers made from synthetic non-woven fiber material. It has been established that electromagnetic radiation absorption coefficient values of the absorbers manufactured in accordance with the presented technology reach a value of 0.9 in the frequency range of 2.0–17.0 GHz, and the width of their effective absorption band is 140.0%.