NDLI: Rectifying surface with optimal RF-to-DC efficiency insensitive to polarisation collimation

Content Provider	IET Digital Library
Author	Li, Ran Chen, Zheda Huangfu, Jiangtao Ran, Lixin Ye, Dexin
Abstract	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.
Starting Page	611
Ending Page	613
Page Count	3
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 10, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.0195
Journal	Electronics Letters
Publisher Date	2019-04-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Branch-line Coupler Continuous Impedance-matching Directional Couplers Energy Harvesting Impedance Matching Maximised Conversion Efficiency Metasurface Orthogonal Component Polarisation Collimation Polarisation-dependent Component Power Electronics Power Supply Rectifier Rectifying Circuit Rectifying Surface RF-to-DC Efficiency Supervisory Circuit Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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