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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
A compact harmonic-suppressed Metasurface rectifier for efficient RF-to-DC power conversion in wireless power
Dunyu Chang1, Chenchen Wang1, Jinling Zhang1
1School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Iscience
|June 3, 2026
Summary
This study introduces a compact metasurface rectifier that efficiently converts RF to DC power for wireless power transfer. It suppresses harmonics, boosting efficiency for IoT devices.
Area of Science:
- Electrical Engineering
- Materials Science
- Electromagnetics
Background:
- Wireless Power Transfer (WPT) systems require efficient Radio Frequency (RF) to Direct Current (DC) power conversion.
- Harmonic suppression is crucial for improving rectifier efficiency in WPT applications.
- Metasurfaces offer novel solutions for electromagnetic wave manipulation and device miniaturization.
Purpose of the Study:
- To design and validate a compact harmonic-suppressed metasurface rectifier (HS-MSR) for efficient RF-to-DC power conversion.
- To improve the conversion efficiency of WPT systems by integrating harmonic suppression directly into the metasurface.
- To enable high-efficiency RF energy harvesting in compact electronic and Internet of Things (IoT) devices.
Main Methods:
- Designed a metasurface unit cell with four symmetrical T-slot resonant branches to suppress high-order harmonics.
- Developed a single-layer, fully integrated structure for direct impedance matching between the rectifier and receiving surface.
- Utilized full-wave and co-simulation, followed by experimental validation with 2x2 and 4x4 prototypes.
Main Results:
- Achieved an RF-to-DC conversion efficiency of 75.6% under arbitrary polarization and wide incidence angles (0°-60°).
- Successfully suppressed high-order harmonic components generated by the nonlinear rectifying diode.
- Demonstrated scalability and robustness through experimental validation of prototype arrays.
Conclusions:
- The proposed HS-MSR offers a filter-less solution for efficient RF-to-DC power conversion in WPT systems.
- The compact, integrated design reduces circuit complexity and insertion loss, suitable for miniaturized devices.
- The HS-MSR presents a promising platform for advanced RF energy harvesting and high-efficiency WPT applications.
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