Comment on “Wide band metamaterial absorber for Ku and K band applications” [J. Appl. Phys. 126, 175104 (2019)]

In recent research published by Chetan et al. [J. Appl. Phys. 126, 175104 (2019)], a wideband metamaterial absorber for Ku and K band applications was presented. In this article, the electromagnetic absorption of more than 90% has been claimed over a large band of frequencies from 14.44 GHz to 27.87...

Full description

Saved in:
Bibliographic Details
Published inJournal of applied physics Vol. 128; no. 3
Main Authors Rubab, Saira, Zafar, Sajeel, Tahir, Farooq A.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 21.07.2020
Subjects
Absorbers
Absorbers (materials)
Applied physics
Bandwidths
Broadband
Conversion ratio
Electric fields
Electromagnetic absorption
Metamaterials
Polarizers
Reflected waves
Online AccessGet full text

Cover

More Information
Summary:In recent research published by Chetan et al. [J. Appl. Phys. 126, 175104 (2019)], a wideband metamaterial absorber for Ku and K band applications was presented. In this article, the electromagnetic absorption of more than 90% has been claimed over a large band of frequencies from 14.44 GHz to 27.87 GHz, achieving a bandwidth of 13.43 GHz. In this comment paper, we proved that the authors did not consider the cross-polarized component of the reflected wave while calculating the absorption index of the proposed structure. The structure, in practical, absorbs even less than 20% of the incident electromagnetic energy within the claimed band while the other energy is reflected back in the form of 90° rotating electric field with respect to the incident field. The subject metamaterial “absorber” can be seen as an efficient cross-polarizer having a polarization conversion ratio above 95%.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5142539