1. High-efficiency multi-band multi-polarization metasurface-based reflective converter with multiple plasmon resonances
- Author
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Guy A. E. Vandenbosch, Chenjiang Guo, Qi Zheng, Jun Ding, and Peng Fei
- Subjects
Physics ,Resonator ,Optics ,business.industry ,Axial ratio ,Linear polarization ,Reflection (physics) ,General Physics and Astronomy ,Wideband ,Polarization (waves) ,business ,Electromagnetic radiation ,Plasmon - Abstract
A simple design of a triple-band multi-polarization reflective polarization converter is presented. The proposed device consists of a modified split-ring structure and a cut-wire resonator. A linearly polarized (LP) incident electromagnetic (EM) wave can be reflected into an orthogonally directed LP wave in two widebands and a circularly polarized (CP) wave in one wideband. The triple-band multi-polarization conversion performance is achieved by combing multiple plasmon resonances, which can be controlled by adjusting the parameters of the modified split-ring structure and the cut-wire resonator independently. The simulations show that a y/x-polarized incident EM wave can be rotated to an x/y-polarized reflected wave from 5.75–9.40 GHz (a fractional bandwidth of 48.18%) and 14.22–16.28 GHz (a fractional bandwidth of 13.51%) with a polarization conversion ratio over 0.9. Besides, a CP reflection is obtained from 10.58–13.88 GHz (a fractional bandwidth of 26.98%) with an axial ratio of less than 3 dB. The device is prototyped and a good agreement between experimental and simulated results is obtained. The proposed multi-functional polarization converter yields a wideband in each polarization conversion band and can be extended to work in other frequency bands.
- Published
- 2021