Energy Harvesting Metasurface with Polarization-Independent and Wide-Angle-Incident Performances for 2.45GHz and 5.8GHz

Runze Huang, Beijia Liu, Xinyu Liu, Jinghui Qiu
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Abstract

This paper presents a dual-band and polarization-independent metasurface with wide range of incident angle for harvesting ambient electromagnetic energy. The proposed unit structure consists of a centrosymmetric metal closed-ring cross, F4B substrate, and 4 loads connected to the ground through 4 metal vias. The fully centrosymmetric structure keeps the working performances of the proposed metasurface unchanged under different polarization directions. Simulation results show that more than 80% of the energy at 2.45GHz and 5.8GHz can be captured at any incident angle ranging from 0°to 60°, taking into account the slight offset of the resonant frequency (no more than 0.05GHz).
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具有偏振无关和广角入射性能的2.45GHz和5.8GHz能量收集超表面
本文提出了一种双波段、偏振无关的大入射角超表面,用于采集环境电磁能量。提出的单元结构由一个中心对称的金属闭合环十字、F4B基板和4个通过4个金属过孔连接到地面的负载组成。全中心对称结构使所提出的超表面在不同极化方向下的工作性能保持不变。仿真结果表明,考虑到谐振频率的轻微偏移(不大于0.05GHz),在0°~ 60°的入射角范围内,可以捕获2.45GHz和5.8GHz频段80%以上的能量。
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