Abstract
In this paper, we propose a high-efficiency and wide-bandwidth linear polarization converter using double U-shaped metasurface. The design is based on the two dimensional artificial electromagnetic materials and micro-antenna array. Theoretical analysis and simulation results show that the proposed polarization converter can realize the orthogonal polarization transformation for the reflected electromagnetic wave, the conversion bandwidth is 6.91-14.31GHz and the polarization conversion ratio is above 90%. Additionally, the measurement results have good agreement with the simulation data. The proposed double U-shaped structure not only has a simple geometry but also can realize the wide bandwidth and high efficiency conversion. Hence it can find wide applications in novel polarization-control devices.
Highlights
High-efficiency and wide-bandwidth linear polarization converter based on double U-shaped metasurface
We propose a high-efficiency and wide-bandwidth linear polarization converter using double U-shaped metasurface
Simulated results show that the conversion bandwidth is 6.91-14.31GHz and the polarization conversion ratio is above 90% at the same interval
Summary
Sui et al demonstrated a topology design method of ultra-wideband polarization conversion metasurfaces based on symmetry coding.[24] Jia et al proposed a four-layer polarization rotator.[26] neither design can realize the simple geometry, wide bandwidth and high efficiency simultaneously. We propose a high-efficiency and wide-bandwidth linear polarization converter using double U-shaped metasurface. It can realize the orthogonal polarization transformation for the reflected electromagnetic wave. Our measured data show a bandwidth from 6.84 GHz to 16 GHz, where co-polarized reflected wave is below -3 dB. This design can be used in many applications, such as radar invisibility, reflector antennas and imaging systems
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