Abstract
In this communication, the design and electromagnetic absorption of a metamaterial coating with a broad modulable absorption in the 8 to 12 GHz frequency range, corresponding to the X-band, is reported. The unit of the coating material consists of a chessboard with chess squares of different heights made of a rGO/Fe<sub>3</sub>O<sub>4</sub>/PPy composite. The influence of the height ratio of the chess squares in a <inline-formula> <tex-math notation="LaTeX">$5 \times 5$ </tex-math></inline-formula> chessboard on the reflection loss (<inline-formula> <tex-math notation="LaTeX">$R_{L}$ </tex-math></inline-formula>) response of electromagnetic radiation in the X band was studied <i>in silico</i>. The results demonstrate that the chessboard-like microwave absorber exhibit tunable response, with a maximum effective reflection loss of −37.43 dB/GHz in the X band range, ca. 24 % higher than the best single layer coating.
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