Broadband absorber with dispersive metamaterials

Abstract: A broadband absorber that utilizes a dispersive metamaterial and covers the entire microwave X-band (8–12 GHz) is proposed in the present study. An ideal absorber attached to the surface of a perfect electric conductor requires the permittivity of the absorbing layer to be anomalously dispersive in the targeted broad frequency band. We show that anomalous dispersion of the permittivity for the X-band can be fitted to a two-pole Lorentz oscillator model and realized with the use of a double-layered, square-loop metamaterial. We explain the connection between the two-pole oscillator model and the double-layered, square-loop metamaterial using an equivalent circuit model and present explicit design rules for the metamaterial. We fabricate a 4-mm-thick metamaterial absorber with flexible silicon rubber, a resistor element, and conductive wire using carbon and silver conductive ink. Our metamaterial absorber achieves a reflectance of less than −20 dB over the entire X-band region.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Broadband absorber with dispersive metamaterials ; volume:12 ; number:13 ; year:2023 ; pages:2443-2449 ; extent:7 ; Nanophotonics ; 12, Heft 13 (2023), 2443-2449 (gesamt 7)

Contributors, Places and Time

• Creator: Han, WonHeum ; Park, Q-Han

Further information

• DOI: 10.1515/nanoph-2022-0777
• URN: urn:nbn:de:101:1-2023062714043896169272
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.01.20252025, 10:34 AM CET