A dual-wideband bi-layered chiral metamaterial to develop cross-polarization conversion and asymmetric transmission functionalities for the linearly polarized electromagnetic waves
| Autor: | Changiz Ghobadi, Rahim Naderali, Farnaz Mirzamohammadi, Javad Nourinia |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Orthogonal polarization spectral imaging Linear polarization business.industry Metamaterial 020206 networking & telecommunications 02 engineering and technology Polarization (waves) Electromagnetic radiation Radio spectrum Azimuth 03 medical and health sciences 0302 clinical medicine Optics 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Wideband business 030217 neurology & neurosurgery |
| Zdroj: | AEU - International Journal of Electronics and Communications. 111:152916 |
| ISSN: | 1434-8411 |
| DOI: | 10.1016/j.aeue.2019.152916 |
| Popis: | A novel modified bi-layered chiral metamaterial (CMM) with dual-wideband cross-polarization conversion and asymmetric transmission (AT) operations is introduced for the transmission of the linearly polarized electromagnetic (EM) waves. To this end, any unit cell of the presented CMM includes a pair of twisted meander-shaped metallic layers arranged on two opposite sides of a thin dielectric slab. The proposed CMM can cover two frequency bands from 8 GHz to 12 GHz and 14 GHz to 15 GHz, which makes it appropriate to be used in X-band and Ku–band applications. The simulated and measured results with acceptable coincidence indicate that the suggested CMM has a significant potential to transform an incident linearly x− (y−) polarized wave into the orthogonal polarization by transmission across the sample along −z (+z) propagation. Parametric studies of the applied structural modifications are investigated to achieve desirable asymmetric transmission. The realized polarization conversion ratio (PCR) has values above 86% at both operating frequency bands. Also, the obtained polarization rotation azimuth angle θ confirms that the plane of the polarization for the transmitted linearly polarized wave rotates relative to the incident one. Furthermore, the procedures of the cross-polarization conversions are investigated by the surface current distributions at two resonant frequencies. |
| Databáze: | OpenAIRE |
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