An ultra-wideband coding polarizer for beam control and RCS reduction

Abstract

Pancharatnam−Berry (PB) phase metasurface, as a special class of gradient metasurfaces, has been paid much attention owing to the robust performance for phase control of circularly polarized waves. Herein, we present an element-based polarizer for the first step, which enables the incident electromagnetic waves into the cross-polarized waves with the relative bandwidth of 71%, and the polarization conversion ratio exceeds 90% at 6.9−14.5 GHz. Then an eight-elements coding polarizer based on the PB phase is presented for the applications on beam control and radar cross section reduction. The simulated values indicate that the reduction of radar cross section is more than 10 dB at 6−16 GHz. Our work reveals the availability of manipulating the waves, beamforming in communication systems and electromagnetic stealth, and so on.

Graphical abstract

Keywords

polarizer / Pancharatnam−Berry phase / coding metasurface / beam control / RCS reduction

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 42274189) and the Project of Science and Technology of Shaanxi (No. 2021JM-395).

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