Review
Nanoscience & Nanotechnology
Shuncheng Tian, Xuanming Zhang, Xin Wang, Jiaqi Han, Long Li
Summary: This review discusses recent advances in metamaterials for simultaneous wireless information and power transmission (SWIPT) technology, including wireless information transmission, wireless power transmission, and wireless energy harvesting. Digital coding and programmable metamaterials have broad commercial applications in wireless communications and power transfer, and are of great importance for future research.
Article
Engineering, Electrical & Electronic
Yijie Wang, Zhan Sun, Yueshi Guan, Dianguo Xu
Summary: This article describes the role and importance of MHz wireless power transfer from an interdisciplinary perspective. It starts by discussing the performance of WPT systems at different frequencies and highlights the basic composition and working principle of MHz systems. It then provides a comprehensive review of recent research on inverters, rectification, impedance compression, dynamic impedance matching, coupling structure design, and multiload model establishment. The article also examines different technologies, compares them, and discusses current challenges and future development trends.
PROCEEDINGS OF THE IEEE
(2023)
Article
Multidisciplinary Sciences
Danilo Brizi, Agostino Monorchio
Summary: This paper presents a general equivalent-circuit interpretation of finite magnetic metasurfaces interacting with an arbitrary arrangement of RF coils operating in the near-field regime. The introduced model provides a physical interpretation and guidelines for the design and understanding of such interactions. The validity of the model is demonstrated through test cases and comparison with experimental measurements.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Zonghua Zheng, Xin Fang, Yitian Zheng, Haoming Feng
Summary: This paper investigates the efficiency and distance improvement in wireless power transfer by adding metamaterials. The mechanism of magnetic negative metamaterial in enhancing efficiency is analyzed, and two types of dual-band metamaterials are designed. Simulation and experiments confirm the effectiveness of these metamaterials in improving efficiency at different frequencies.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Engineering, Manufacturing
Chuanbing Cheng, Yuanhui Liu, Rongwei Ma, Runhua Fan
Summary: The recent advancement of metacomposites with negative permittivity provides a new research approach for the design and construction of electromagnetic shielding materials. In this study, Ni/YIG metacomposites were fabricated using a liquid impregnation approach and their electromagnetic properties were explored at MHz and Ku bands. With an increase in Ni content, isolated Ni particles formed interconnected networks in the composites, resulting in changes in conducting mechanism and reactance characteristic. The composites with high Ni contents exhibited a negative permittivity behavior, attributed to low-frequency plasma state of free electrons in the completed Ni networks. The dispersion of negative permittivity at frequencies below 10 MHz was influenced by isolated metal particles and could be well described by the Drude-Lorentz model. A notable shielding effectiveness of 33.1 dB was achieved at Ku band, primarily due to the impedance mismatch caused by the negative permittivity. The inductive conducting networks were crucial building blocks for achieving negative permittivity and improving electromagnetic shielding performance. This work provides guidance for designing electromagnetic shielding metacomposites and promotes further development in this field.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Physics, Applied
Xu Chen, Zhiwei Guo, Jun Jiang, Haitao Jiang, Hong Chen
Summary: With the development of electronic communication technology and miniaturized electromagnetic devices, near-field magnetic shielding has become a hot topic. However, the widely used metal and ferrite shielding materials have limitations in terms of high Ohmic loss and heavy weight respectively. This study proposes a Halbach-like structure that achieves highly efficient and ultra-broadband near-field magnetic shielding using patterned metal and ferrite structures, providing a method for other near-field controls.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xiaosheng Huang, Yi Dou, Shuyi Lin, Yuan Tian, Ziwei Ouyang, Michael A. E. Andersen
Summary: This article introduces the analytical modeling and optimal design of synchronous class E rectifiers to achieve load-independent operation and efficient power conversion. The LCC-S compensated MHz-WPT topology is proposed for fully soft-switching and constant voltage gain over the entire load range. Validation of the proposed model and methodology is done through a 6.78-MHz WPT prototype system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jiafeng Zhou, Pei Zhang, Jiaqi Han, Long Li, Yi Huang
Summary: This article reviews the use of metamaterials and metasurfaces for wireless power transfer and energy harvesting, showing their ability to enhance transmission and conversion efficiency. Metamaterials can optimize rectennas and improve the performance of energy harvesters as passive components.
PROCEEDINGS OF THE IEEE
(2022)
Article
Optics
Hao Wang, Jun Wang, Huomu Yang, Guoliang Deng, Qingdong Yang, Ruijun Niu, Yudan Gou
Summary: Laser wireless power transmission has various applications for mobile devices and specific equipment. However, the non-uniformity of the light spot received by laser photovoltaics results in system efficiency reduction. The decrease in short-circuit current is the main factor for decreasing the efficiency.
Article
Materials Science, Multidisciplinary
Pengfei Shi, Yangyang Cao, Hongge Zhao, Renjing Gao, Shutian Liu
Summary: In this paper, a desktop wireless power transmission (DWPT) implementation method based on parallel-strips-coupled split ring resonators (PSSRR) is proposed for efficient long-distance wireless charging and to overcome the irregularity of the transmission path. The PSSRR, consisting of split ring resonators, dielectric disks, and parallel conductor strips, allows for effective conversion between magnetic field and propagating mode through near field magnetic resonance coupling. Simulation and experimental results demonstrate the feasibility and robustness of the proposed method, achieving a transmission efficiency of 76% at a distance of 1900 mm under a plane bent path.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Optics
Qingdong Yang, Yi Wang, Jinhui Shi, Changxu Liu, Shuang Zhang
Summary: This study proposes a novel method for achieving arbitrary power distribution by leveraging the unique properties of an Epsilon Near Zero (ENZ) environment. It shows that power from a single source can be transferred to multiple receivers inside an ENZ medium by modifying the optical properties of the receivers. This approach eliminates the need for complex configurations and communications and enables efficient energy transfer.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Rui Zhang, Kaiqi Wang, Xiaole Wang, Xudong Luo, Chunyu Zhao
Summary: This study presents a reconfigurable electromagnetic metamaterial (REMM) composed of spiral copper-clad unit cells with micro-tunable capacitors for precise control of electromagnetic properties. Experimental results demonstrate its wide frequency adjustment range and desirable magnetic field manipulation in wireless power transfer systems.
Article
Computer Science, Information Systems
Qi Le, Ruiming Wu, Jiangyu Chen, Meiling Huang, Yang Fu, Feng Huang, Lijun Wang, Shan Du, Qipeng Li
Summary: This study proposes a multi-transmitter coil array to establish a more uniform magnetic flux density and enhance the performance of wireless power transmission system (WPTS) in the case of coil-couple malposition. The magnetic field distributions of the proposed WPTS with different coil arrays are compared using numerical simulations. Experimental results show that WPTS with a seven-coil array can provide a more uniform magnetic field, with a relative deviation of output power less than 28.55%. This study provides clues for improving the performance of WPTS through different arrangements of transmitter coils.
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jia-Jing Kao, Chun-Liang Lin, Jamie Yang
Summary: This article presents a novel wireless power transmission scheme that incorporates both relay transmission and magnetic field data communication. A resonant inverter with pulsewidth modulation is used to induce longer distance alternating current for power transmission. For data transmission, a magnetic field communication system based on impedance changes and not reliant on extra radio frequency links is realized. Experimental prototype tests verify simultaneous transmission of power and data in compliance with SAE TIR J2954 specifications.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
