Rectifying surface with optimal RF-to-DC efficiency insensitive to polarisation collimation
Rectifying surface with optimal RF-to-DC efficiency insensitive to polarisation collimation
复制标题
具有最佳射频转直流效率的整流表面，对偏振准直不敏感
DOI：
10.1049/el.2019.0195
复制
发表时间：
2019
影响因子：
1.1
通讯作者：
Dexin Ye
中科院分区：
文献类型：
--
作者：
Ran Li;Zheda Chen;Jiangtao Huangfu;Lixin Ran;Dexin Ye
提出了一种基于介面和支线耦合器的能量采集整流面，具有最佳的射频-直流转换效率，对偏振准直不敏感。该亚表面通过两个独立的载荷高效地捕获入射波的两个正交分量。采用90°分支线耦合器，将偏振相关的两个分量重新分配到两个恒定的等功率输出，目的是保持元面和整流器之间的连续阻抗匹配，以实现最大的转换效率。制作了所提出的校正面，并进行了测量。测量的俘获效率和转换效率的波动范围分别小于2%和0.5%，与作者的预测一致。他们预计这一新颖的概念在未来将出现广泛的应用。
A rectifying surface for energy harvesting with optimal RF‐to‐DC efficiency insensitive to polarisation collimation is presented based on metasurface and branch‐line coupler. The metasurface captures two orthogonal components of incident wave by two separate loads with high efficiency. A 90° branch‐line coupler is introduced to redistribute two polarisation‐dependent components into two invariant equipower outputs, aiming to preserve continuous impedance‐matching between metasurface and rectifiers for maximised conversion efficiency. The proposed rectifying surface has been fabricated and measured. The measured fluctuation ranges of capture and conversion efficiency are smaller than 2 and 0.5%, respectively, agreeing well with authors’ prediction. They expect a wide range of applications to emerge from this novel concept in the future.