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In the deep subwavelength regime and close to the causal minimum thickness of 8. 2 mm that is determined from the simulated absorption spectrum, the average thickness of the integrated absorber, 8. 9 mm, is close to the causal minimum thickness of 8. 2 mm. The layered composite represents a new breed of acoustic metamaterials with a high acoustic energy density and broad underwater use.
Source link: https://europepmc.org/article/MED/35584217
Between a periodic arrayed indium tin oxide film and a low-resistivity ITO reflective layer, the proposed MMA with high optical transmittance polymethyl methacrylate polymethyl methacrylate has high optical transmittance polyacrylate. Using surface current distribution and power loss density, the proposed MMA's microwave attenuation mechanisms were investigated. The resulting MMA has a good chance for producing optical transmittance microwave absorption windows and equipment, according to the excellent microwave absorption and optical transmission properties.
Source link: https://europepmc.org/article/PPR/PPR484885
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