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An Ultrathin and Ultrawideband Metamaterial Absorber and an Equivalent-Circuit Parameter Retrieval Method

de Araújo, José Bruno and Siqueira, Glaucio and Kemptner, Erich and Weber, Mauricio and Junqueira, Cynthia and Mosso, Marbey (2020) An Ultrathin and Ultrawideband Metamaterial Absorber and an Equivalent-Circuit Parameter Retrieval Method. IEEE Transactions on Antennas and Propagation, 68 (5), pp. 3739-3746. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TAP.2020.2963900. ISSN 0018-926X.

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Official URL: https://ieeexplore.ieee.org/document/8954875


In this article, we propose an ultrathin and ultrawideband metamaterial (MTM) absorber based on periodically arranged metallic square spirals. The design, characterization, and measurement of the proposal are presented as its equivalent circuit. The lumped elements of the equivalent circuit are extracted using a proposed algorithm based on the leastsquare method, which presents a straightforward and promising approach and shows a good matching with the electromagnetic simulation. The unit cell of the proposed structure has the square spiral mounted on an FR-4 substrate in front of a conductive plate. The simulated results show an absorptivity of more than 90% from 11.4 to 20.0 GHz, covering the K u-band for transverse magnetic (TM) and transverse electric (TE) polarizations, and this broadband feature is confirmed by the experimental measurement. Furthermore, the proposed MTM absorber is lambda/16.4 in thickness at the lowest frequency of absorption. The proposed MTM has proper response under oblique incidence from 0 to 50 deg and shows great performance with regard to the absorbers previously presented in the literature.

Item URL in elib:https://elib.dlr.de/134862/
Document Type:Article
Title:An Ultrathin and Ultrawideband Metamaterial Absorber and an Equivalent-Circuit Parameter Retrieval Method
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
de Araújo, José BrunoUNSPECIFIEDhttps://orcid.org/0000-0002-6979-1563UNSPECIFIED
Siqueira, GlaucioUNSPECIFIEDhttps://orcid.org/0000-0001-7526-085XUNSPECIFIED
Kemptner, ErichUNSPECIFIEDhttps://orcid.org/0000-0002-3791-7985UNSPECIFIED
Weber, MauricioUNSPECIFIEDhttps://orcid.org/0000-0001-9591-1701UNSPECIFIED
Junqueira, CynthiaUNSPECIFIEDhttps://orcid.org/0000-0003-0486-3420UNSPECIFIED
Mosso, MarbeyUNSPECIFIEDhttps://orcid.org/0000-0002-9536-3837UNSPECIFIED
Date:5 May 2020
Journal or Publication Title:IEEE Transactions on Antennas and Propagation
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 3739-3746
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Broadband, equivalent circuit, metamaterial (MTM) absorber, parameter retrieval, ultrathin
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Kemptner, Dr.tech. Erich
Deposited On:18 Sep 2020 14:08
Last Modified:18 Sep 2020 14:08

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