Seng, Sim Man and Yeow, You Kok and Esa, Fahmiruddin and Dimon, Mohamad Ngasri and Khamis, Nor Hisham (2018) Multiband metamaterial microwave absorbers using split ring and multiwidth slot structure. International Journal of RF and Microwave Computer-Aided Engineering, 31 (12). pp. 1-13. ISSN 1099-047X
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Abstract
This article proposes a multiband metamaterial microwave absorber based on a split ring-slot structure. Both simulation and experimental measurements are carried out to obtain the scattering parameters which are used to retrieve the absorption coefficient, relative permittivity, and relative permeability. The influences on the absorption produced by geometrical dimensions, incidence angles and polarisation angles are investigated from 1.5 to 18.0 GHz. The results show that the absorber possesses three resonance peaks with absorption greater than 70% measured experimentally at 3.0, 5.8, and 11.0 GHz. The absorption performance is insensitive to the angle of incidence, θ up to 60�.The absorption mechanisms are studied based on the surface current distribution, electric field distribution, and constitutive parameters (μr and εr). Furthermore, a mechanical mean using dielectric material to tune the absorption frequencies (up to 1.0 GHz of tuning range) and enhance the absorption bandwidth (up to 50%) is demonstrated.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Metamaterials; Microwave Absorbers; Multi-Band; Split Ring Resonators; Tunable |
| Subjects: | T Technology > TS Manufactures > TS155-194 Production management. Operations management |
| Divisions: | Faculty of Applied Science and Technology > Department of Physics and Chemistry |
| Depositing User: | UiTM Student Praktikal |
| Date Deposited: | 24 Jan 2022 01:27 |
| Last Modified: | 24 Jan 2022 01:27 |
| URI: | http://eprints.uthm.edu.my/id/eprint/5820 |
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