2023-07-05
Research and Design of a Dual-Band Reflective Foused Metasurface for Wireless Power Transfer
By
Progress In Electromagnetics Research M, Vol. 118, 1-10, 2023
Abstract
To solve the problem of single working frequency of traditional reflective focused metasurface, a dual-band reflective focused metasurface is proposed, which can realize independent focusing characteristics at 7.25 GHz and 20.5 GHz. The metasurface unit is composed of metal elements combined by a split-ring resonant structure working at 7.25 GHz and an elliptical resonant structure working at 20.5 GHz in the same plane, dielectric substrate and ground. Dual-band independent control and 360° phase coverage are achieved by adjusting the dimensions of unit. The surface current distribution also verifies the rationality of the designed metasurface element. Based on the principle of quasi-optical path, a dual-band reflective focused metasurface with independent focusing characteristics is designed. Through full-wave simulation, the focusing efficiency at 7.25 GHz and 20.5 GHz is calculated by Poynting theorem, which are 56.9% and 57.5%, respectively. The proposed dual-band metasurface has the characteristics of simple structure and low profile without multi-layer stacking and metal through-holes.
Citation
Bo Yin, Zhu Xu, Junhao Cong, Xiangdong Fu, Haibin Xu, and Zhuoze Wu, "Research and Design of a Dual-Band Reflective Foused Metasurface for Wireless Power Transfer," Progress In Electromagnetics Research M, Vol. 118, 1-10, 2023.
doi:10.2528/PIERM23030602
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