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Tytuł pozycji:

Wide Bandwidth Angle- and Polarization-Insensitive Symmetric Metamaterial Absorber for X and Ku Band Applications.

Tytuł :
Wide Bandwidth Angle- and Polarization-Insensitive Symmetric Metamaterial Absorber for X and Ku Band Applications.
Autorzy :
Hannan S; Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, Malaysia. .
Islam MT; Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, Malaysia. .
Almutairi AF; Electrical Engineering Department, College of Engineering and Petroleum, Kuwait University, Safat, 13060, Kuwait. .
Faruque MRI; Space Science Center (ANGKASA), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
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Źródło :
Scientific reports [Sci Rep] 2020 Jun 25; Vol. 10 (1), pp. 10338. Date of Electronic Publication: 2020 Jun 25.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: London : Nature Publishing Group, copyright 2011-
References :
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Sci Rep. 2019 Aug 26;9(1):12334. (PMID: 31451705)
Entry Date(s) :
Date Created: 20200627 Latest Revision: 20200629
Update Code :
20201218
PubMed Central ID :
PMC7316865
DOI :
10.1038/s41598-020-67262-5
PMID :
32587313
Czasopismo naukowe
In this paper, a wide bandwidth angle- and polarization-insensitive symmetric metamaterial (MM) absorber for X and Ku band is proposed. For both normal and oblique incidence in TEM mode, the proposed unit cell shows high absorption at different polarizing angles due to structural symmetry. A four-fold resonator was introduced in the unit cell to enhance the bandwidth. The performance of the proposed absorber is determined by both full-wave simulations and measurements. The simulated and measured absorptions are almost similar at normal incidence with 94.63%, 95.58%, 97% and 75.58% at 11.31 GHz, 14.11 GHz, 14.23 GHz, and 17.79 GHz respectively. At 45° for these frequencies, the absorptions are 95.47%, 97.2%, 97.12% and 75.29% respectively. For 90°, the absorptions are similar to those for 45° except 98.15% for 14.21 GHz. At all these angles and resonance frequencies, either permittivity or permeability was found negative, as a result, the refractive index was negative revealing metamaterial characteristics of the unit cell. Along with high absorptivity and wide incidence angle insensitivity up to 90°, a total of 1.42 GHz of absorption bandwidth was achieved, which is better than recent similar works with FR4 substrate.
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