Abstract
In recent days, we read a paper called “Design of a Quad-Band Wide-Angle Microwave Metamaterial Absorber”, which was written by Ren et al. In such report, Ren et al. proposed a quad-band wide-angle absorber based on a metallic hexagonal patch layer. The absorption peaks are located at 6.8 GHz, 8.24 GHz, 11.24 GHz, and 12.7 GHz, whose absorptivity values are 97.2%, 95.2%, 97.7%, and 98.5%, respectively. However, we verified that the results which were given by Ren et al. are wrong because they ignored the polarization conversion. The proposed quad-band metamaterial absorber (QBMA) is not an absorber.
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Acknowledgments
This work was supported by the Open Research Program in China’s State Key Laboratory of Millimeter Waves (Grant No. K201927).
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Kong, X., Zhang, H., Dao, R. et al. Comment on “Design of a Quad-Band Wide-Angle Microwave Metamaterial Absorber”. J. Electron. Mater. 48, 4166–4169 (2019). https://doi.org/10.1007/s11664-019-07194-7
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DOI: https://doi.org/10.1007/s11664-019-07194-7