Ultra-thin dual-band perfect metamaterials absorber for microwave applications
| Autor: | Younes S. Alwan, Khalid Saeed Lateef Al-badri, Mamoon F. Khalaf |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science business.industry Metamaterial 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Wavelength Resonator Optics 0103 physical sciences Multi-band device Antenna (radio) 0210 nano-technology Absorption (electromagnetic radiation) business Microwave |
| Zdroj: | Materials Today: Proceedings. 42:2164-2168 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2020.12.300 |
| Popis: | This article studies an ultra-thin dual-band perfect electromagnetic metamaterials absorber. It presents a typical artificial microwave structure that can realize multi-band perfect metamaterial absorption. The structure design was implemented by using a Four Quarters of Circle Resonator (FQCR), an ultra-thin FR-4 dielectric substrate and an entire metal plate. The simulated results show two perfect absorption peaks with absorption rates, where the first peak hits 99.35%, and the second peak hits 97.81%. In addition, the ratios of the structure thickness to the wavelengths of the proposed design are 1/82 and are 1/66 at resonance frequency 9.12 GHz and 11.34 GHz respectively, which are ultra-thin comparing with wavelengths. By using the distributions of electric surface current, the mechanism of the ultra-thin dual band is described. This absorber is non-sensitive to the TE polarization wave ranging from 0° to 90° and non-sensitive to the TM polarization wave ranging from 0° to 60° for the first peak and to 45° for the second peak. Furthermore, such multi-band absorber promises many x-band applications, such as harvesting, radar cross section RCS, sensing, antenna enhancement, thermal image and detection. |
| Databáze: | OpenAIRE |
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