Comment on ‘Wide-angle broadband microwave metamaterial absorber with octave bandwidth’

摘要

This comment demonstrates that in a recent study by Bhattacharyya et al., a linear reflective polarisation converter is erroneously interpreted as broadband absorber. It is clearly shown that the incident electromagnetic wave is reflected with its orthogonal polarisation state due to which co-polarised reflection is reduced. Total absorption, when both the co- and cross-polarised reflected components are considered, is less than 20% in the operating band claimed by the authors.