Inkjet-printed frequency-selective surfaces based on carbon nanotubes for ultra-wideband thin microwave absorbers
| Autor: | Isabelle Huynen, Sophie Hermans, Jean-Pierre Raskin, Francisco Mederos-Henry, V. Dupont, R. Jaiswar |
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| Přispěvatelé: | UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique, UCL - SST/IMCN/MOST - Molecules, Solids and Reactivity |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Resistive touchscreen Materials science business.industry Bandwidth (signal processing) Ultra-wideband Carbon nanotube Dielectric Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Selective surface Electronic Optical and Magnetic Materials law.invention law 0103 physical sciences Equivalent circuit Optoelectronics Electrical and Electronic Engineering business Microwave |
| Zdroj: | Journal of Materials Science: Materials in Electronics, Vol. 1, no.12, p. 2 (2019) |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-019-02751-6 |
| Popis: | A microwave absorber combining frequency-selective surfaces (FSSs) and dielectric layers is presented. FSSs are printed on dielectric layers using a resistive ink made of a suspension of carbon nanotubes. The absorber exhibits a fractional bandwidth of 137%, corresponding to reflectivity lower than $$-\,15$$ dB and absorption higher than 90% from 7.30 till 41.95 GHz, meaning a 34 GHz bandwidth, for a thickness of only 0.13 $$\lambda$$. This performance is obtained by tuning the number of printed layers, which fixes FSS resistivities, hence the absorption bandwidth. An electrical equivalent circuit is proposed to explain the absorption mechanism. Excellent agreement is observed between the designed and measured low reflectivity and high absorption. The absorber stands out in term of bandwidth and compacity as compared to the state of the art. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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