Article
Engineering, Electrical & Electronic
Ernest So, Pyungwoo Yeon, E. J. Chichilnisky, Amin Arbabian
Summary: This study proposes an RF-US relay chip for efficient wireless power transfer to mm-sized implants across different media. The relay chip improves signal transmission efficiency through the use of an RF inductive link and adiabatic power amplifiers, as well as implementing beamforming.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2022)
Article
Automation & Control Systems
Zhuang Shao, Yumei Wen, Zhuangzhuang Xu, Leixiang Bian, Ping Li, Guangjun Wen, Zhenbing Li, Gang Li, Yao Wang, Tao Han, Xiaojun Ji
Summary: This article proposes a wireless current detection system that utilizes the ambient magnetic field to detect cable current, avoiding the constraints of wired connections and batteries, and providing an extendable measurement range.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Abbas Semnani, Badri Baskaran, Dimitrios Peroulis
Summary: This article introduces a new technique for wireless powering of agricultural sensors buried deep underground, using agricultural drainage tiles as waveguides and converting electromagnetic waves into DC power with high-efficiency rectifiers to charge underground sensor batteries. The experimental validation and measurements conducted in various scenarios demonstrate the feasibility of the proposed technique.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
S. Nagaveni, Sesha Sairam Regulagadda, Ashudeb Dutta
Summary: This article introduces a dead-band compensated multiband stacked electromagnetic energy harvester for powering sensor nodes. The harvester is adaptive to typical ambient radio frequency (RF) power levels found in the environment. It utilizes a stage-stage feedforward technique and a compensation circuit to enhance the output voltage, harvested power, and sensitivity. Experimental results show an improved efficiency by 13% on average under dead-band compensation, with the harvester achieving a start-up voltage of 320 mV at -24 dBm.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Zhuang Shao, Yumei Wen, Ping Li, Guoda Wang, Yao Wang, Tao Han, Xiaojun Ji
Summary: RF sensing tags are essential for the Internet of Things, but their functionality can be affected by the mutual influence between adjacent tags. Analyzing the mutual impedance between tags provides insights into the wireless links between them. Experiments validate the impact of antenna separation on data decoding and transmission.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Can Uysal, Tansu Filik
Summary: In the future, device-free technologies such as RF waves will be more commonly used for human-machine interactions, requiring machine learning and polarization diversity to improve accuracy. New feature extraction methods and signal processing techniques can make device-free air-writing recognition more effective.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Nachiket Ayir, Taneli Riihonen, Markus Allen, Marcelo Fabian Trujillo Fierro
Summary: This study focuses on RF wireless power transfer using a digital radio transmitter, and highlights the impact of multisine waveforms' PAPR on the end-to-end efficiency. The research indicates that digital modulation signals have better efficiency compared to multisines.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Saikat Mondal, Yihang Chu, Mark Cuddihy, Ali Attaran, Mahrnoud Yousef Ghannam, Premjeet Chahal
Summary: This paper proposes a hybrid RFID tag and reader system for wireless and batteryless automotive sensors. The system can significantly reduce the effective on-time of the reader and its feasibility is validated through experiments.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Computer Science, Hardware & Architecture
Abdulaziz Alhoshany
Summary: A wide-dynamic range high-efficiency differential RF-to-DC power converter for wireless power transfer applications is proposed, offering high power conversion efficiency and better dynamic range compared to conventional designs. The proposed rectifier utilizes adaptive biasing and dynamic body biasing techniques to control conduction and minimize leakage current, achieving peak PCE values at different frequency bands.
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS
(2021)
Article
Engineering, Electrical & Electronic
Amjad Iqbal, Muath Al-Hasan, Ismail Ben Mabrouk, Tayeb A. Denidni
Summary: In this article, a complete and efficient wireless power transfer (WPT) system is designed and validated for deep-body ingestible biomedical capsules. The system consists of a full-duplex antenna, a half-wave rectifier, and a WPT transmitter (Tx), and it offers features such as seamless telemetry, compact size, high efficiency, and high-power transfer efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Wenda Li, Shelly Vishwakarma, Chong Tang, Karl Woodbridge, Robert J. Piechocki, Kevin Chetty
Summary: This paper presents a Passive IoT Radar (PIoTR) system, which utilizes RF signals from IoT devices for human monitoring. PIoTR calculates the phase shifts caused by human motions and generates Doppler spectrogram as the representative. Experimental results show that PIoTR performs well in occupancy detection and activity recognition.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Information Systems
Zhu Liu, Pengde Wu, Gaosheng Li
Summary: This paper presents a wearable RF energy-localized harvester with multiple antennas and spoof surface plasmon structure for multibeam radiation to power the Bluetooth sensor module. The harvester is made of flexible materials and does not require RF connectors or soldering works. It can support a battery-free Bluetooth temperature and humidity sensor with a power density of 2.75 gW/cm(2). The design demonstrates the potential of RF energy harvesting for powering small electronic devices in wearable applications.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Mahmoud Wagih, Steve Beeby
Summary: A new type of RF energy harvesting surface was proposed, utilizing electrically small wire-type rectenna elements to achieve efficient energy collection and suppress load resistance dependence. Experimental results show that up to 36% power conversion efficiency can be achieved with 27.5 μW output power generated under a 40 kΩ load.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Engineering, Electrical & Electronic
Satoshi Yoshida, Shunya Asakura, Shuhei Yamanokuchi, Kenjiro Nishikawa
Summary: This letter proposes a wideband and compact microwave rectifier design that uses the conditions for flat frequency characteristics of RF-dc conversion efficiency. The use of lumped element design and multistage matching method resulted in a wideband characteristic.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Computer Science, Information Systems
Humberto Pereira Da Paz, Vinicius Santana Da Silva, Renan Diniz, Renan Trevisoli, Carlos Eduardo Capovilla, Ivan Roberto Santana Casella
Summary: This article focuses on improving low-power Radio Frequency Energy Harvesting (RFEH) designs using Schottky Barrier Diode (SBD) rectifiers. The study investigates the relationship between RF-DC Power Conversion Efficiency (PCE) and circuit temperature, specifically the non-linear behavior of the metal-semiconductor junction of SBDs. Through evaluation and modeling, two series RF rectifiers based on specific diodes are designed for efficient operation over different temperature ranges. The results demonstrate the stability of PCE for one of the diodes, despite overall limitations due to matching network losses.
Article
Engineering, Electrical & Electronic
Ruirui Chen, Jiahao Niu, Handong Gui, Zheyu Zhang, Fei Wang, Leon M. Tolbert, Daniel J. Costinett, Benjamin J. Blalock, Benjamin B. Choi
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2020)
Article
Engineering, Electrical & Electronic
Handong Gui, Ruirui Chen, Zheyu Zhang, Jiahao Niu, Leon M. Tolbert, Fei Wang, Daniel Costinett, Benjamin J. Blalock, Benjamin B. Choi
Summary: This article presents a methodology of busbar layout design for 3L converters based on the magnetic cancellation effect, with a detailed design example provided for a high-power 3L-ANPC converter. The loop inductance of the busbar is verified, showing significantly lower values than other references for NPC-type converters.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Spencer Cochran, Chongwen Zhao, Daniel Costinett
Summary: In this article, a wireless charging architecture employing a multilevel switched-capacitor ac-dc rectifier is investigated. The proposed rectifier features a multilevel design that offers advantages such as compactness, efficiency, impedance tunability, and harmonic attenuation. Experimental results demonstrate low waveform distortion and high efficiency across various load conditions.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ruiyang Qin, Jie Li, Daniel Costinett
Summary: This article proposes a high-power, high-frequency wireless power transfer system for electric vehicles (EVs) with lightweight and compact coil design. The system utilizes a multilayer nonuniform self-resonant coil to eliminate the need for external capacitors and mitigate high-frequency conduction loss. Experimental tests demonstrate 95.2% efficiency and 52.5 kW/m² power density with 6.6 kW power transferred across a 100-mm coil-to-coil distance. This system showcases the first 6.6-kW wireless power transfer system for EV charging using compact self-resonant coils at MHz frequency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jie Li, Ruiyang Qin, Jingjing Sun, Daniel Costinett
Summary: This article describes the systematic design of a 100-W multiload wireless charging station with positional flexibility for receivers, limited cross-channel disturbance, and high efficiency. The design uses transmitter coil design approach and an immittance network to achieve these features. A holistic system-level modeling and design method is proposed for maximum efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Hua (Kevin) Bai, Daniel Costinett, Leon M. Tolbert, Ruiyang Qin, Liyan Zhu, Ziwei Liang, Yang Huang
IEEE POWER ELECTRONICS MAGAZINE
(2022)
Proceedings Paper
Green & Sustainable Science & Technology
Kamal Sabi, Daniel Costinett
Summary: Power electronic inverters for photovoltaic systems have been trending towards high efficiency and power density, but less attention has been paid to reliability improvements. By implementing design for reliability techniques and new modular topologies, it is possible to increase inverter reliability. A new approach utilizing GaN-based inverters has been shown to triple the inverter lifetime, reducing repair costs and increasing the lifetime energy production of PV systems.
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2021)
Proceedings Paper
Energy & Fuels
Spencer Cochran, Daniel Costinett
Summary: Active rectifiers enhance wireless power transfer systems by providing tunability, high efficiency, and low waveform distortion. Managing the control problem of synchronizing the switching frequency to the transmitter while regulating the output stability over a wide range of operating points is crucial. This study contributes a closed form derivation for the cross-coupling behaviors in the control architecture for a 7-level switched capacitor WPT system, demonstrating wide-range control with stable output regulation and frequency synchronization.
2021 IEEE PELS WORKSHOP ON EMERGING TECHNOLOGIES: WIRELESS POWER TRANSFER (WOW 2021)
(2021)
Proceedings Paper
Energy & Fuels
Jingjing Sun, Ruiyang Qin, Jie Li, Daniel J. Costinett, Leon M. Tolbert
Summary: This study presents an investigation of a resonant reactive shielding coil for wireless power transfer systems. The design method is validated using an experimental prototype, and the effect of the shielding coil in systems with metal and ferrite plates is investigated.
2021 THIRTY-SIXTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2021)
(2021)
Proceedings Paper
Energy & Fuels
Peter Pham, Spencer Cochran, Daniel J. Costinett, Leon M. Tolbert
2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2020)
Proceedings Paper
Energy & Fuels
Ruiyang Qin, Jie Li, Daniel Costinett
2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2020)
Proceedings Paper
Energy & Fuels
Saeed Anwar, Daniel Costinett, Subhajyoti Mukherjee, Shajjad Chowdhury
2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2020)
Proceedings Paper
Energy & Fuels
Ruirui Chen, Fred Wang, Leon M. Tolbert, Daniel J. Costinett, Benjamin B. Choi
2020 THIRTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2020)
(2020)
Proceedings Paper
Energy & Fuels
Ruirui Chen, Fred Wang, Leon M. Tolbert, Daniel J. Costinett, Benjamin B. Choi
2020 THIRTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2020)
(2020)
Article
Computer Science, Information Systems
Aaron D. Scher, Michal Kosik, Peter Pham, Daniel Costinett, Eklas Hossain
