Article
Chemistry, Analytical
Yi Fan, Xiongying Liu, Chao Xu
Summary: This study presents an implantable antenna for RF energy harvesting and data transmission. The antenna operates at dual ISM bands and has compact dimensions. The antenna generates multiple resonant frequencies for wideband operation and can be used for both energy harvesting and data transmission.
Article
Chemistry, Analytical
Yiqing Wei, Junping Duan, Huihui Jing, Huimin Yang, Hao Deng, Chengwei Song, Jiayun Wang, Zeng Qu, Binzhen Zhang
Summary: This paper presents a dual-band metasurface array for harvesting electromagnetic energy in the Wi-Fi band and Ku band. The experimental results show that the RF-to-dc efficiencies of the array are 64% and 55% at 2.4 GHz and 12.6 GHz, respectively.
Article
Engineering, Electrical & Electronic
Daju Lee, Juntaek Oh
Summary: This letter presents a wide dual-band rectifier with a dual-band matched voltage doubler, which achieves high power conversion efficiency over a wide dual-band range and a wide input power range.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yiqing Wei, Huihui Jing, Hao Deng, Chengwei Song, Junping Duan, Jiayun Wang, Zeng Qu, Binzhen Zhang
Summary: This article presents a dual-band, polarization-insensitive, wide-angle metasurface array for electromagnetic energy harvesting. By designing interconnected array units and an optimized rectifier circuit, the energy capture capability and power density of the array are improved. The experimental results show high collection efficiency.
RESULTS IN PHYSICS
(2023)
Article
Computer Science, Information Systems
Shuaipeng Zhao, Xin Liu, Yingxi Wang, Yong An
Summary: This paper presents a 125 KHz single-stage dual-output wireless power receiver using pulse skip modulation. The receiver eliminates interstage loss, improves power conversion efficiency, and reduces chip area and cost by only using one stage and four power transistors without an inductor.
Article
Engineering, Electrical & Electronic
Hyungseok Nam, Dang-An Nguyen, Gia Thang Bui, Chulhun Seo
Summary: A novel design of a high-efficiency dual band rectifier based on coupled transmission line (CTL) is presented. The proposed structure includes two parts: Part A utilizes a CTL to suppress the second harmonic of both frequencies, enabling a dual band-efficient power recycling mechanism; Part B implements a dual band fundamental matching network using a combination of CTL and single transmission line (TL) for further power conversion efficiency enhancement. Experimental results show that the rectifier achieves a high PCE of 81.98% and 77.85% at 0.915 and 2.4 GHz, respectively, with an optimal load resistance of 680 O. The proposed rectifier demonstrates advantages of high PCE and compactness compared to existing works.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Pengde Wu, Si-Ping Gao, Yi-Dan Chen, Zhi Hua Ren, Pengyu Yu, Yongxin Guo
Summary: This article proposes a wireless uplink method for a sensor node based on modulating rectifier-generated harmonics, which shows potential for lowered energy consumption and Tx-to-Rx leakage. By integrating a rectifier and a transmitter, the wireless power reception and the modulation of reradiated second harmonic are achieved, while maintaining the rectification performance.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Yu Yang Xiao, Jun-Hui Ou, Shao Fei Bo, Wenquan Che, Xiu Yin Zhang
Summary: The key difficulty in designing a wideband rectifier is impedance matching. Traditional approaches are limited by the matching network and often result in larger rectifier sizes. This study explores the impedance characteristics of Schottky diodes and uses a simple matching network to achieve ultrawide bandwidth. The proposed design method is applicable to various diode models for different applications. Experimental results show a power conversion efficiency of over 50% in a frequency range of 0.1 to 4 GHz, with a relative bandwidth of 190% and a compact size of 1 x 1 cm(2). The peak efficiency reaches up to 74.9%.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Chun-Hong Du, Fei Cheng, Chao Gu
Summary: This letter introduces an efficient tri-band rectifier using a multistub matching network. Theoretical analysis shows good input impedance matching can be achieved with the tri-band impedance matching network consisting of the multistub. A fabricated tri-band rectifier operating at 0.915, 2.45, and 5.8 GHz demonstrates maximum efficiencies of 76.7%, 74.4%, and 68.7% respectively with a 1000 Omega load. This proposed rectifier has the potential application as an energy converter for battery-less electrical devices.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Energy & Fuels
Yanjin Hou, Guowen Feng, Zhizhen Liu, Xiaozhao Wei, Sen Qiao, Xueqing Luo, Ran Ding, Shuyao Sun, Benhui Zhang
Summary: This paper analyzes the operating characteristics of the Dual-LCC MCRWPT system and studies the phase relationships and load variations associated with the input and output. Through simulation analysis, the effectiveness of the controlled rectifier control mode is verified, providing a theoretical basis for its optimization.
Article
Engineering, Electrical & Electronic
Siyi Xiao, Changjun Liu, Haoming He, Yuhao Feng, Wenquan Che
Summary: This letter proposes a high-efficiency dual-band class-F rectifier for wireless power transmission. The rectifier achieves good class-F operation by controlling the second and third harmonics in dual bands, and improves the rectifying efficiency through theoretical analysis of the harmonic termination network.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Babita Gyawali, Samundra K. Thapa, Adel Barakat, Kuniaki Yoshitomi, Ramesh K. Pokharel
Summary: This paper proposes a novel rectification circuit for wideband voltage doubler rectifiers, which achieves efficient rectification with minimal inter-stage matching that includes a short-circuit stub and a virtual battery, overcoming existing problems in RF-dc conversion efficiency bandwidths.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Md. Ahsan Halimi, Partha Pratim Shome, Taimoor Khan, Sembiam R. Rengarajan
Summary: In recent years, the increasing innovation in wireless systems has led to a growing demand for fifth-generation (5G) enabled RF Energy Harvesting and Wireless Power Transfer systems. This study presents two efficient rectifier configurations that can be implemented in both RFEH and WPT systems covering the global Sub-6 GHz 5G bands. The proposed designs achieve high power conversion efficiency and have the potential to provide a global solution for self-sustainable low-powered 5G battery-less devices.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Fading Zhao, Kai Wei, Wei Wang, Zhong Huang, Chu Chu
Summary: This letter analyzes and theoretically proves that multiple single-stage voltage multipliers in parallel exhibit slowly changing input impedance with a wide load range. Based on this unique property, a low-power microwave rectifier consisting of two single-stage voltage multipliers in parallel is designed, fabricated, and measured for different output loads. The results show good characteristics in both efficiency and load range, with power conversion efficiency (PCE) maintained above 60% from 3 to 20 kΩ, which is in agreement with the simulation results.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Energy & Fuels
Bing Cheng, Liangzong He, Le Li, Houxuan Liu, Fengwang Lu
Summary: In order to address the issue of insufficient power transmission caused by load changes in a Wireless Power Transfer (WPT) system, this paper proposes a bridge rectifier with a parallel inductance-capacitor network. By utilizing the nonlinear impedance transformation characteristics, the variation range of equivalent AC impedance can be suppressed to improve coil coupling efficiency, and the power output capability can be enhanced under light load conditions. Furthermore, the proposed rectifier ensures soft switching within a wide load range without introducing additional imaginary impedance. The network parameters are optimized using an average efficiency algorithm, and the electric performance of the proposed structure is verified through experimental results.
Article
Engineering, Electrical & Electronic
Apostolos Georgiadis, Nuno Borges Carvalho
Summary: This paper provides a convex optimization formulation for antenna arrays with reactively loaded parasitic elements. The objective function aims to maximize the array gain while considering the constraints on admittance to account for reactive loads. The study explores topologies with two and three electrically small dipole arrays, investigating the conditions for achieving supergain. Admittance constraints are formulated as linear or quadratic constraints, requiring an equivalent convex relaxation formulation. The paper also includes a design example for an electrically small superdirective rectenna, computing the upper bound on rectifier efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Chaoyun Song, Yuan Ding, Aline Eid, Jimmy G. D. Hester, Xuanke He, Ryan Bahr, Apostolos Georgiadis, George Goussetis, Manos M. Tentzeris
Summary: This article introduces the latest developments in backscatter communication, covering wirelessly powered backscattering wireless sensor networks, RF system integration, and energy harvesting techniques. It also discusses the recent advancements in embedded device packaging and integration technologies, as well as the challenges and future directions of backscatter communication.
PROCEEDINGS OF THE IEEE
(2022)
Article
Computer Science, Information Systems
Ioannis Zenginis, John Vardakas, Nikolaos E. Koltsaklis, Christos Verikoukis
Summary: This article presents a reinforcement-learning based real-time energy management scheme for smart homes. The scheme aims to minimize electricity cost and residents' thermal discomfort through the appropriate scheduling of storage devices and HVAC systems. The study's main contribution is the development of a clustering process that partitions the training data set into more homogeneous subsets, allowing for more efficient energy schedules.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Chemistry, Analytical
Spyridon Nektarios Daskalakis, Apostolos Georgiadis, Manos M. Tentzeris, George Goussetis, George Deligeorgis
Summary: This study proposes a long-range zero interception ambient backscatter communication system using low power sensors. By utilizing chirp spread spectrum modulation on ambient signals, it enables low-cost and low-power communications over hundreds of meters.
Article
Engineering, Electrical & Electronic
Valentina Palazzi, Ricardo Correia, Xiaoqiang Gu, Simon Hemour, Ke Wu, Alessandra Costanzo, Diego Masotti, Enrico Fazzini, Apostolos Georgiadis, Hooman Kazemi, Ricardo Pereira, Naoki Shinohara, Dominique Schreurs, Jung-Chih Chiao, Alexandru Takacs, Daniela Dragomirescu, Nuno Borges Carvalho
IEEE MICROWAVE MAGAZINE
(2023)
Article
Computer Science, Information Systems
Massimiliano Maule, John S. Vardakas, Christos Verikoukis
Summary: Network slicing is crucial for 5G and future networks, enabling independent execution environments for logical networks with different functionalities. This article introduces a real-time NS management framework for 5G New-Radio, which achieves slice resource management through dynamic evaluation of user quality of service and tenant service level agreements.
IEEE SYSTEMS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Woohyeok Choi, Apostolos Georgiadis, Manos M. Tentzeris, Sangkil Kim
Summary: The frequency-diverse array (FDA) is a promising technology due to its angle- and range-dependent beam pattern. This study analyzed the relationship between range and frequency increment and thoroughly investigated the operation principle of FDA. It also discussed the effect of coupling among antenna elements and proposed a novel exponential FDA method for short-range beam focusing. The design procedures and analysis methods of FDA are also presented in this article.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Massimiliano Maule, John S. Vardakas, Christos Verikoukis
Summary: In this paper, a novel radio access network orchestrator that combines network function placement and resource allocation techniques is proposed. The results show significant improvements in performance and resource utilization compared to traditional schemes.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Chanfang Cao, Xuanming Zhang, Chaoyun Song, Apostolos Georgiadis, George Goussetis
Summary: Simultaneous wireless information and power transfer (SWIPT) is a game changer for wireless sensing networks (WSNs) and industrial Internet of Things (IoT). A multi-polarization wideband rectenna design is proposed to improve the operational stability and robustness of the receiver in diverse environments.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Civil
Anestis Dalgkitsis, Luis A. Garrido, Farhad Rezazadeh, Hatim Chergui, Kostas Ramantas, John S. Vardakas, Christos Verikoukis
Summary: The development of SDN and NFV has brought about challenges in network management. Dynamic service orchestration and adaptive resource allocation are necessary to handle the growth of users and data-intensive applications. The impact of network automation on energy consumption and operating costs is often neglected. This paper focuses on reducing latency and improving energy efficiency in beyond-5G networks through zero-touch Service Function Chain (SFC) orchestration, and proposes a distributed Reinforcement Learning (RL) based framework.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Computer Science, Information Systems
Ioannis Zenginis, John Vardakas, Nikolaos E. Koltsaklis, Christos Verikoukis
Summary: In this study, a reinforcement learning-based method for energy scheduling in smart homes is proposed, aiming to minimize electricity cost, residents' thermal discomfort, and EV users' range anxiety. The results show significant improvement compared to other RL-based approaches in existing literature.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Kyriaki Niotaki, Nuno Borges Carvalho, Apostolos Georgiadis, Xiaoqiang Gu, Simon Hemour, Ke Wu, Diogo Matos, Daniel Belo, Ricardo Pereira, Ricardo Figueiredo, Henrique Chaves, Bernardo Mendes, Ricardo Correia, Arnaldo Oliveira, Valentina Palazzi, Federico Alimenti, Paolo Mezzanotte, Luca Roselli, Francesca Benassi, Alessandra Costanzo, Diego Masotti, Giacomo Paolini, Aline Eid, Jimmy Hester, Manos M. Tentzeris, Naoki Shinohara
Summary: Radio frequency (RF) energy harvesting and wireless power transmission (WPT) technologies have attracted significant interest in wireless applications and RFID systems. This article provides a historical overview, discusses technical challenges, and presents recent advances in these technologies.
IEEE JOURNAL OF MICROWAVES
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Ioannis Zenginis, John Vardakas, Kostas Ramantas, Christos Verikoukis
Summary: This paper proposes a RL-based method for energy scheduling of a smart home's energy storage system. Through data clustering, the method achieves superior energy schedules.
2022 IEEE 27TH INTERNATIONAL WORKSHOP ON COMPUTER AIDED MODELING AND DESIGN OF COMMUNICATION LINKS AND NETWORKS (CAMAD)
(2022)
Article
Computer Science, Hardware & Architecture
John S. Vardakas, Kostas Ramantas, Evgenii Vinogradov, Md Arifur Rahman, Adam Girycki, Sofie Pollin, Simon Pryor, Philippe Chanclou, Christos Verikoukis
Summary: This article proposes an innovative converged optical-wireless network configuration to facilitate the smooth transition towards future 6G networks through the development of novel radio access networking solutions.
IEEE WIRELESS COMMUNICATIONS
(2022)
