Article
Chemistry, Analytical
Sen Bing, Khengdauliu Chawang, J. -C. Chiao
Summary: A resonator coupler for subcutaneous implants has been developed with a new impedance matching pattern added to the conventional loop antenna, significantly improving resonance. Practical constraints such as operating within regulated frequency bands and limited thickness for implants were taken into account. The design method was validated for use on human skin, and the effects of tissue depth variations due to individual surgery were investigated.
Article
Multidisciplinary Sciences
Hongwei Sheng, Jingjing Zhou, Bo Li, Yuhang He, Xuetao Zhang, Jie Liang, Jinyuan Zhou, Qing Su, Erqing Xie, Wei Lan, Kairong Wang, Cunjiang Yu
Summary: This study introduces a novel fully biodegradable and bioabsorbable high-performance supercapacitor implant that is lightweight, thin, mechanically flexible, tunable in degradation duration, and biocompatible. The supercapacitor utilizes two-dimensional, amorphous molybdenum oxide flakes as electrodes and demonstrates high areal capacitance and energy density. Demonstrations in rat bodies show the potential uses of the supercapacitor implant for powering electronic devices and complete degradation post-implantation.
Article
Chemistry, Physical
Fuhai Liu, Hao Zhou, Lianbin Xia, Shiyuan Chang, Chi Zhang, Jin Chen, Yijie Tong, Fuyi Cui, Yili Shen, Bo Zhao, Jinkai Chen, Weipeng Xuan, Hao Jin, Shurong Dong, Andrew Flewitt, Zhong Lin Wang, Jikui Luo
Summary: In this article, a body-based capacitive coupling and conductive channel power transfer (BCPT)-P-4 technology is proposed for powering wearable and implant electronic devices. This technology can harvest 50/60 Hz electricity unintentionally from daily electronic devices and transfer it to wearable devices via the body conductive channel. It has the potential to power wireless wearable and implant systems.
Article
Energy & Fuels
Ahmed O. MohamedZain, Lee Wei Hou, Huangshen Chua, Kianmeng Yap, Lau Kim Boon
Summary: This research proposes a wireless power transfer platform using four transmitting coils and a single receiving coil for charging a 3S LiPo drone battery. Experimental investigations show high efficiency and stable charging time.
Article
Engineering, Electrical & Electronic
Yicun Meng, Guozheng Yan, Pingping Jiang, Kai Zhao, Wei Wang, Fanji Chen, Haoyu Zhuang
Summary: This paper introduces a novel wireless power transfer system that overcomes key limitations in traditional applications by improving low power transfer efficiency and poor power transfer stability. Experimental results demonstrate significant improvements in capsule robots.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Yang Xiao, Yong Yang, Chunhua Liu, Jose Rodriguez
Summary: In this study, a novel wireless motor system called the wireless ultrasonic motor (WUM) system is proposed and analyzed. By combining wireless power transfer and ultrasonic motor technology, the system addresses the issues of complex controllers and converters, regular maintenance, and output ripple. Matching inductors and optimized coil structures are designed to improve power quality and filter harmonic voltages.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xingran Gao, Chunhua Liu, Hong Zhou, Wenshan Hu, Yongcan Huang, Yang Xiao, Zhongcheng Lei, Jing Chen
Summary: This article presents the design, analysis, and verification of a new hybrid wireless power transfer system, which achieves high efficiency and space-saving design by simplifying the coupling elements and realizing superposition of inductive and capacitive coupling. The mechanism of efficiency improvement is explained through a detailed analysis of the system's reflected impedance. Experimental results show a 14% increase in efficiency compared to pure inductive power transfer at a 35 cm distance, validating the effectiveness of the proposed system. Moreover, the effects of varying the resonant frequency are investigated to guide practical system design.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Manuele Bertoluzzo, Abhay Kumar, Amritansh Sagar
Summary: The advancements in the charging strategy of electric vehicles will have inevitable effects on the electric grid. Electric vehicle battery chargers can perform bidirectional power transfer and offer valuable services to the distribution grid or to the domestic grid. Wireless power transfer chargers provide a safe and user-friendly approach to electric vehicles. Bidirectional wireless power transfer chargers capable of vehicle to grid services are the natural evolution of these concepts.
Article
Biotechnology & Applied Microbiology
Yeon Sik Choi, Rose T. Yin, Anna Pfenniger, Jahyun Koo, Raudel Avila, K. Benjamin Lee, Sheena W. Chen, Geumbee Lee, Gang Li, Yun Qiao, Alejandro Murillo-Berlioz, Alexi Kiss, Shuling Han, Seung Min Lee, Chenhang Li, Zhaoqian Xie, Yu-Yu Chen, Amy Burrell, Beth Geist, Hyoyoung Jeong, Joohee Kim, Hong-Joon Yoon, Anthony Banks, Seung-Kyun Kang, Zheng Jenny Zhang, Chad R. Haney, Alan Varteres Sahakian, David Johnson, Tatiana Efimova, Yonggang Huang, Gregory D. Trachiotis, Bradley P. Knight, Rishi K. Arora, Igor R. Efimov, John A. Rogers
Summary: A biodegradable pacemaker without external leads has been developed to improve the safety of temporary cardiac pacing. This fully implantable pacemaker can control cardiac rate and rhythm postoperatively before dissolving completely. Tested in various animal and human models, this approach overcomes key disadvantages of traditional temporary pacing devices.
NATURE BIOTECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yuanshuang Fan, Yue Sun, Pengqi Deng, Hongsheng Hu, Chaoqiang Jiang, Yuchen Feng
Summary: This letter proposes a simultaneous wireless power and data transfer (SWPDT) method for wireless power transfer systems. Data and power are transferred via the same coupler. To achieve high transfer power and data transfer rate, a double-side LCC compensation topology with bandpass filtering is adopted to create favorable conditions for data transfer. An inductor fully compensated at the power carrier frequency is used to inject and extract the data carrier, multiplexed with the power carrier. Additionally, the duration time of the data transfer channel's transient responses is regulated based on complex frequency-domain analysis. Finally, a 1.1kW SWPDT experimental prototype with a data transfer rate of 1 Mbps and a data transfer delay of 0.4 μs is built to verify the feasibility of the proposed method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Jure Domajnko, Natasa Prosen
Summary: This paper presents the evolution of an inductive wireless power transfer using a multicoil system. The proposed structure, called the double DDQ coil structure, consists of double DD coils on the transmitter and receiver side upgraded with an additional nonpolar quadrature coil. The main advantage of this structure is increased power density and increased misalignment tolerance.
Article
Automation & Control Systems
Junwei Liu, Fei Xu, Chuan Sun, Ka Hong Loo
Summary: In this article, a compact single-phase integrated-power-stage ac-dc WPT converter with only four active power switches and four diodes is proposed. The converter can perform ac-dc power factor correction rectification and dc-dc wireless power transfer conversion simultaneously, overcoming the drawbacks of traditional two-stage topologies.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Review
Computer Science, Information Systems
Mehmet Zahid Erel, Kamil Cagatay Bayindir, Mehmet Timur Aydemir, Sanjay K. Chaudhary, Josep M. Guerrero
Summary: This paper reviews the performance parameters, advantages, disadvantages, and challenges of capacitive power transfer (CPT) technology in various application areas. It examines the basic principles of CPT technology, evaluates its applications based on performance parameters and different types of components, and categorizes the applications into six main groups. The review serves as a reference for researchers studying CPT systems and their applications.
Article
Engineering, Electrical & Electronic
Yuxin Liu, Chunhua Liu, Senyi Liu, Yongcan Huang
Summary: This article proposes a novel wireless energy router that enables power exchange among multiple energy storage devices, such as mobile electronics, electric vehicles, and energy storage stations. Independent power transmission channels with specific operating frequencies are built using wireless power transfer technology. The power flow in each channel is regulated through the synthesis of multiple-frequency voltage components and dual-side phase-shift control strategy. Simulation and experimental results demonstrate the effectiveness of the proposed wireless energy router.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Wei Tang, Yangqiao Lin, Chao Zhang, Yuwen Liang, Jinrong Wang, Wei Wang, Chen Ji, Maoying Zhou, Huayong Yang, Jun Zou
Summary: The new SEFAs soft actuators, which utilize electrically responsive fluids to convert energy, demonstrate excellent actuation performance and comprehensive capabilities, with potential applications in wearable assistant devices and soft robots.
Article
Engineering, Electrical & Electronic
Rehab S. Hassan, Jongheon Lee, Sanghoek Kim
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Batyrbek Alimkhanuly, Sanghoek Kim, Lok-won Kim, Seunghyun Lee
Article
Multidisciplinary Sciences
Hyunwoo Joo, Youngsik Lee, Jaemin Kim, Jeong-Suk Yoo, Seungwon Yoo, Sangyeon Kim, Ashwini Kumar Arya, Sangjun Kim, Seung Hong Choi, Nanshu Lu, Han Sang Lee, Sanghoek Kim, Soon-Tae Lee, Dae-Hyeong Kim
Summary: This study presents a novel treatment system for neurological emergencies using a soft implantable drug delivery device. The efficacy of the prompt treatment was demonstrated in animal experiments, showing reduced brain damages and increased survival rates. By integrating the SID wirelessly with wearable devices, bulky rigid components can be minimized, achieving mechanical softness and miniaturization.
Article
Nanoscience & Nanotechnology
Jongheon Lee, Andrew J. Park, Yuji Tanabe, Ada S. Y. Poon, Sanghoek Kim
Summary: This method utilizes destructive interference physics to measure fat thickness by minimizing the amplitude of reflected wave at certain frequencies. It can operate on planar tissue, cylindrical, and human phantom models. Experimental results show that this simple method can be used for continuous self-monitoring of abdominal fatness due to its low cost and simple procedure.
Review
Engineering, Biomedical
Seungwon Yoo, Jonghun Lee, Hyunwoo Joo, Sung-Hyuk Sunwoo, Sanghoek Kim, Dae-Hyeong Kim
Summary: Implantable bioelectronic devices are promising solutions for diseases, but the bulky and rigid conventional devices pose challenges. Recent advances in RF-based power transfer and telemetry offer potential solutions for these issues.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Physics, Applied
Sungik Park, Jongheon Lee, Sanghoek Kim
Summary: This paper presents cavity resonators under parity-time- (PT) symmetric conditions for robust wireless power transfer with minimal exposure to electromagnetic fields. Coupled transceiver cavities reduce EM field magnitude near the power-delivery system by large factors compared to conventional coil systems, while still maintaining high power-transfer efficiency.
PHYSICAL REVIEW APPLIED
(2021)
Article
Engineering, Aerospace
Donghoon Kim, Andrew Junghoon Park, Ui-Suk Suh, Dongwoo Goo, Donghwan Kim, Boram Yoon, Won-Sang Ra, Sanghoek Km
Summary: This article proposes an accurate clutter synthesis method for dynamic radar under various environmental conditions. The method overcomes the limitations of previous methods by creating and summing clutter patches, enabling accurate synthesis of clutter signals under different observation scenarios. The synthesized clutters agree well with actual measured data, and the program is freely available.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Jongheon Lee, Hyunwoo Kim, Kun-Woo Park, Jong-Han Kim, Sanghoek Kim
Summary: In this article, analytical formulation and data-fitted formula for calculating the resonant frequency of a planar mirrored-coil sensor are presented. These methods show significantly higher accuracy compared to the conventional one, providing a quick way to evaluate and design the sensor structure with high precision.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Chemistry, Analytical
Hyeonkeon Lee, Jongheon Lee, Honghyeon Park, Mi Song Nam, Yun Jung Heo, Sanghoek Kim
Summary: The study presents a mm sized wireless biomedical sensor system using backscattered frequency-modulation communication for low-power operation and glucose level reading from a fluorescent hydrogel sensor. The optimized reader structure enables efficient wireless power transfer and data communication, miniaturizing the implantable device to a size of 3 x 6 mm2. The wireless interface is envisioned to be applicable to other fluorescence-based biosensors for comfortable, biocompatible, and stable use within the body.
Article
Computer Science, Information Systems
Ashwini K. Arya, Seongjin Kim, Kyeongjun Ko, Sanghoek Kim
Summary: This study presents a new design for a railway communication antenna, taking into account the needs of 5G communication systems. The use of a shark-fin cover to protect the antenna from external influences was explored, as well as its suitability for installation on the train roof for communication in the front and back directions and along the track.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Multidisciplinary Sciences
Hyunwoo Kim, Seungwon Yoo, Hyunwoo Joo, Jongheon Lee, Donggeun An, Seonghyeon Nam, Hyungu Han, Dae-Hyeong Kim, Sanghoek Kim
Summary: A WPT system with laterally aligned neutral elements in parity-time symmetry is proposed, which can widen the operational area. Compared to traditional methods, this system reduces complexity and achieves high voltage gain and efficiency.
Article
Engineering, Electrical & Electronic
Junghoon Park, Donghoon Kim, Donghwan Kim, Sanghoek Kim
PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS
(2020)
Article
Engineering, Electrical & Electronic
Ashwini K. Arya, Seongjin Kim, Sungik Park, Donghoon Kim, Rehab S. Hassan, Kyeongjun Ko, Sanghoek Kim
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2020)
Article
Engineering, Electrical & Electronic
Rehab S. Hassan, Sung Ik Park, Ashwini Kumar Arya, Sanghoek Kim
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
(2020)
Article
Engineering, Electrical & Electronic
Ashwini Kumar Arya, Seong Jin Kim, Sanghoek Kim
PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS
(2020)
