Recently, Barde C, Choubey A, Sinha R. [A set square design metamaterial absorber for X-band applications. J Electromagn Waves Appl. 2020;34:1430–1443.] have demonstrated the metamaterial absorber for X-band applications. In the present communication, we numerically investigated that a cross-polarizer is mistakenly reported as a wideband metamaterial absorber. Authors ignored the cross-polarized reflection component in the calculation of the absorption. Moreover, it is proved that the anisotropic geometry of the unit cell provides poor absorption and it is suitable for the polarization conversion.

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评论：用于X波段应用的方形设计超材料吸收器

最近，Barde C、Choubey A、Sinha R. [用于 X 波段应用的方形设计超材料吸收器。J 电磁波应用。2020;34:1430–1443.] 已经展示了用于 X 波段应用的超材料吸收器。在目前的通讯中，我们对交叉偏振器被错误地报告为宽带超材料吸收器进行了数值研究。作者在计算吸收时忽略了交叉偏振反射分量。此外，证明了晶胞的各向异性几何结构提供了较差的吸收，并且适用于偏振转换。