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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Chih-Chiang Wu Uma Sankar Rout Yu-Long Wang Yi-Ling Lin Jwu-Sheng Hu Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu R.O.C. Department of Electrical Engineering&Computer Science National Yang Ming Chiao Tung University

ISBN: (数字)9798350378771

ISBN: (纸本)9798350378788

This study rigorously tests and verifies silicon carbide (SiC) power modules within a developed 800 V electric vehicle traction inverter. SiC traction inverters offer high efficiency, power density, and compact size. The developed SiCbased traction inverter is thoroughly evaluated on the established platform with various switching frequency, achieving a peak drive efficiency exceeding 98% at 6 kHz and a power density of $50 \mathrm{~kW} / \mathrm{L}$.

关键词： Power system measurements MOSFET Silicon carbide Density measurement Circuits and systems Switching frequency Asia Multichip modules Electric vehicles Inverters

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Coherent magnon-induced domain wall motion in a magnetic insulator channel

arXiv

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arXiv 2022年

作者： Fan, Yabin Gross, Miela J. Fakhrul, Takian Finley, Joseph Hou, Justin T. Liu, Luqiao Ross, Caroline A. Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Microsystems Technology Laboratories Massachusetts Institute of Technology CambridgeMA02139 United States

Advancing the development of spin-wave devices requires high-quality low-damping magnetic materials where magnon spin currents can propagate efficiently and interact effectively with local magnetic textures. We show that magnetic domain walls (DW) can modulate spin-wave transport in perpendicularly magnetized channels of Bi-doped yttrium-iron-garnet (BiYIG). Conversely, we demonstrate that the magnon spin current can drive DW motion in the BiYIG channel device by means of magnon spin-transfer torque. The DW can be reliably moved over 15 µm distances at zero applied magnetic field by a magnon spin current excited by an RF pulse as short as 1 ns. The required energy for driving DW motion is orders of magnitude smaller than those reported for metallic systems. These results facilitate low-switching-energy magnonic devices and circuits where magnetic domains can be efficiently reconfigured by magnon spin currents flowing within magnetic channels. © 2022, CC BY-NC-ND.

关键词： Domain walls

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A SiC-Based 243 kW 60 kW/L Electric Vehicle Traction Inverter

A SiC-Based 243 kW 60 kW/L Electric Vehicle Traction Inverte...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Chih-Chiang Wu Uma Sankar Rout Hsin-Ping Chou Jwu-Sheng Hu Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan R.O.C. Department of Electrical Engineering & Computer Science National Yang Ming Chiao Tung University Hsinchu

ISBN: (数字)9798350376067

ISBN: (纸本)9798350376074

This paper investigates the evolving landscape of EV traction inverters, addressing key technical goals outlined by US Drive and analyzing parameters such as voltage, power density, and efficiency. Through innovative methodologies, a high-efficiency SiC-based traction inverter is developed to overcome challenges like spatial constraints. Leveraging international benchmarks, a cutting-edge SiC-based 800V 243 kW traction inverter with a power density of 60 kW/L is presented, poised to surpass US Drive's 2025 targets. This study emphasizes SiC technology's role in advancing EV propulsion systems towards sustainable and efficient transportation solutions.

关键词： Power system measurements Inductance Density measurement Silicon carbide Transportation Voltage Propulsion Electric vehicles Inverters Safety

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High Spectral Selectivity of Tantalum Cross-Shaped Unit Elements for STPV Systems

High Spectral Selectivity of Tantalum Cross-Shaped Unit Elem...

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IEEE Conference on Nanotechnology

作者： Ahsan Sarwar Rana Muhammad Atif Khan Sumbel Ijaz Muhammad Qasim Mehmood Yehia Massoud Department of Electrical and Computer Engineering Air University Islamabad Pakistan Innovative Technologies Laboratories (ITL) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Department of Electrical Engineering Micro Nano Lab Information Technology University (ITU) of the Punjab Lahore Pakistan

The efficiency of single-junction PhotoVoltaic (PV) cells is restricted by the Shockley-Queisser (SQ) limit. This work presents a simulation based design of metasurface absorber and emitter for Solar ThermoPhotoVoltaics (STPV) system that overcomes the SQ limit by employing Tantalum resonators which exhibits high spectral selectivity. The STPV system introduces an intermediate structure consisting of a broadband optical absorber and a selective emitter before solar radiations reach PV cell. The operating temperature of the system being very high, a refractory metal Tantalum (Ta) with a melting point of 3017 °C provides high thermal stability. Metasurface broadband Ta-based absorber design is a supercell consisting of four cross resonators with total thickness of 290 nm. The absorber design gives broadband absorptance for 200–2000 nm region, which efficiently covers ultraviolet, optical, and infrared regimes. The absorber has an efficiency of is 91.5%, and 91.9% for BBR, and for the air mass (AM) 1.5 spectrum, respectively. On the contrary, emitter employs a unit element in the shape of a cross with a total thickness of 272 nm. The emitter of proposed intermediate design achieves high spectral selectivity for targeted quaternary PV cell InGaAsSb having a bandgap of 0.55 eV through narrowband emittance. The maximum simulated STPV efficiency attained by design is 39.1% considering polarization and angle-insensitivity of the design.

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Sensing-Communication-Computing-Control Closed-Loop Optimization for 6G Digital Twin-Empowered Unmanned Robotic Systems

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IEEE Journal on Selected Areas in Communications 2025年

作者： Fang, Xinran Lei, Chengleyang Feng, Wei Chen, Yunfei Xiao, Ming Ge, Ning Wang, Cheng-Xiang Tsinghua University State Key Laboratory of Space Network and Communications Department of Electronic Engineering Beijing100084 China University of Durham Department of Engineering DurhamDH1 3LE United Kingdom Royal Institute of Technology School of Electrical Engineering and Computer Science Department of Information Science and Engineering Sweden Southeast University National Mobile Communications Research Laboratory School of Information Science and Engineering Nanjing210096 China Purple Mountain Laboratories Nanjing211111 China

In recent decades, cyber-physical systems (CPSs) have received great attention due to their broad applications. This paper investigates CPS deployment in remote areas, specifically focusing on a digital twin-empowered unmanned robotic system. The system consists of a multifunctional unmanned aerial vehicle (UAV), sensors, and actuators. The UAV carries communication and computing modules, acting as an edge information hub (EIH) that connects sensors and actuators - forming reflex-arc-like sensing-communication-computing-control (SC3) loops. A digital twin is integrated into the EIH to emulate the system's behavior and assist in the decision-making. To alleviate resource limitations in remote areas, we propose a goal-oriented closed-loop optimization scheme. The proposed scheme takes the SC3 loop as an integrated structure and jointly optimizes uplink and downlink (UL&DL) communication and computing resources to minimize the total linear quadratic regulator (LQR) cost. To address the non-convex optimization problem, we derive the closed-form solution for intra-loop allocation and propose an efficient iterative algorithm for inter-loop optimization. Under the condition of adequate CPU frequency, we derive an approximate closed-form solution for inter-loop bandwidth allocation. Simulation results demonstrate the superiority of the proposed scheme, which achieves a two-tier task-level balance within and across the SC3 loops. © 1983-2012 IEEE.

关键词： Drones

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Near-field communications:characteristics,technologies,and engineering

引用

Frontiers of Information technology & Electronic engineering 2024年第12期25卷 1580-1626页

作者： Yajun ZHAO Linglong DAI Jianhua ZHANG Ran JI Mengnan JIAN Hao XUE Hongkang YU Yunqi SUN Yu LU Zidong WU Zhuo XU Jinke LI Haiyang MIAO Zhiqiang YUAN Pan TANG Jiayu SHEN Tierui GONG Haixia LIU Jiaqi HAN Qiang FENG Zhi CHEN Lingxiang LI Gang YANG Yong ZENG Cunhua PAN Wang LIU Kangda ZHI Weidong HU Yuanwei LIU Xidong MU Chau YUEN Mérouane DEBBAH Chongwen HUANG Long LI Ping ZHANG State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen 518055China ZTE Corporation Beijing 100192China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310007China Key Laboratory of High Speed Circuit Design and EMC of Ministry of Education School of Electronic EngineeringXidian UniversityXi’an 710071China Collaborative Innovation Center of Information Sensing and Understanding Xidian UniversityXi’an 710071China National Key Laboratory of Wireless Communications University of Electronic Science and Technology of ChinaChengdu 611731China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Purple Mountain Laboratories Nanjing 211111China School of Electrical Engineering and Computer Science Technical University of BerlinBerlin 10623Germany School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina Centre for Wireless Innovation(CWI) School of ElectronicsElectrical Engineering and Computer ScienceQueen’s University BelfastBelfast BT39DTUK School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore KU 6G Research Center Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates

Near-field technology is increasingly recognized due to its transformative potential in communication systems,establishing it as a critical enabler for sixth-generation(6G)telecommunication *** paper presents a comprehensive survey of recent advancements in near-field technology ***,we explore the near-field propagation fundamentals by detailing definitions,transmission characteristics,and performance ***,we investigate various near-field channel models—deterministic,stochastic,and electromagnetic information theory based models,and review the latest progress in near-field channel testing,highlighting practical performance and *** evolving channel models,traditional mechanisms such as channel estimation,beamtraining,and codebook design require redesign and optimization to align with near-field propagation *** then introduce innovative beam designs enabled by near-field technologies,focusing on non-diffractive beams(such as Bessel and Airy)and orbital angular momentum(OAM)beams,addressing both hardware architectures and signal processing frameworks,showcasing their revolutionary potential in near-field communication ***,we highlight progress in both engineering and standardization,covering the primary 6G spectrum allocation,enabling technologies for near-field propagation,and network deployment ***,we conclude by identifying promising future research directions for near-field technology development that could significantly impact system *** comprehensive review provides a detailed understanding of the current state and potential of near-field technologies.

关键词： 6G Near-field technology Channel model Codebook Non-diffractive beams Orbital angular momentum engineering and standardization

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Parameters for Non-Solitons in Fiber and Their Impact on Transmission Performance over Long Distances 6

Parameters for Non-Solitons in Fiber and Their Impact on Tra...

引用

6th International Symposium on Multidisciplinary Studies and Innovative Technologies, ISMSIT 2022

作者： Salih, Mustafa Muhanad M. Alrubaee, Saif H. Dheyab, Abdullah Abdulateef, Ihsan Amjad Abdulsattar, Nejood Faisal Abbas, Fatima Hashim AL Mansour University College Department of Computer Science and Information System Iraq Al-Farahidi University Department of Communication Technical Engineering Baghdad Iraq Al-Anbar Health Directorate Ministry of Health Iraq Altinbas University Department of Electrical and Computer Engineering Turkey College of Information Technology Imam ja'Afar AI-Sadiq University Department of Computer Technical Engineering Al-Muthanna66002 Iraq Al-Mustaqbal University College Medical Laboratories Techniques Department Hillah51001 Iraq

ISBN: (数字)9781665470131

ISBN: (纸本)9781665470131

One area of study that has gained popularity recently is communication technology. Due to the exponential growth in data transfer rates, optical fibre communication (OFC) is the only viable solution. The OFC technology provides extremely high bandwidth and rates of up to several gigabits per second. Optical fibre can carry a lot of data while being quite lightweight. Unfortunately, attenuation, dispersion, and nonlinearity are all phenomena of optical fibre transmission systems that might increase fibre signals. Rather of relying on dispersive effects, an improved approach lies in the use of optical solitons. Different from non-soliton communication systems, solitons do not grow in size as the distance between nodes increases. This research compares and contrasts the efficiency of solitons and non-solitons in fibres. By comparing the eye diagrams and bit error rates, we may deduce that soli-ton-based fibre systems are the most distortion-free, whereas non-soliton-based fibre systems exhibit some level of background noise. © 2022 IEEE.

关键词： Solitons

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Sensing Few Electrons Floating on Helium with High-Electron-Mobility Transistors

arXiv

引用

arXiv 2024年

作者： Feldman, Mayer M. Fuchs, Gordian Liu, Tiffany D’Imperio, Luke A. Henry, M. David Shaner, Eric A. Lyon, Stephen A. Department of Electrical and Computer Engineering Princeton University 41 Olden Street PrincetonNJ08544 United States Department of Physics Princeton University Washington Road PrincetonNJ08544 United States Microsystems Engineering Science and Applications Sandia National Laboratories AlbuquerqueNM87123 United States EeroQ Corporation ChicagoIL United States

We report on low-frequency measurements of few electrons floating on superfluid helium using a bespoke cryogenic cascode amplifier circuit built with off-the-shelf GaAs High-Electron-Mobility Transistors (HEMTs). We integrate this circuit with a Charge-Coupled Device (CCD) to transport the electrons on helium and characterize its performance. We show that this circuit has a Signal-to-Noise ratio (SNR) of ∼ 2 √e/Hz at 102 kHz, an order of magnitude improvement from previous implementations and provides a compelling alternative to few electron sensing with high frequency resonators. © 2024, CC BY.

关键词： Superfluid helium

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Orbital angular momentum emission from a high quality factor photonic crystal ring

Orbital angular momentum emission from a high quality factor...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xiyuan Lu Mingkang Wang Feng Zhou Mikkel Heuck Wenqi Zhu Vladimir A. Aksyuk Dirk R. Englund Kartik Srinivasan Microsystems and Nanotechnology Division NIST Gaithersburg MD USA Joint Quantum Institute University of Maryland College Park MD USA Department of Electrical and Photonics Engineering Technical University of Denmark Lyngby Denmark Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA

We provide quantitative understanding of orbital angular momentum (OAM) emission for whispering gallery modes in a microring, and achieve high-Q (10 5 to 10 6 ), high ejection efficiency (up to 90 %), and highOAM num... 详细信息

ISBN: (纸本)9781957171258

关键词： Emission Nonlinear parametric processes Optical angular momentum Photonic crystals Scanning electron microscopy Whispering gallery modes

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Automatic Synthesis of Light Processing Functions for Programmable Photonics: Theory and Realization

arXiv

引用

arXiv 2022年

作者： Gao, Zhengqi Chen, Xiangfeng Zhang, Zhengxing Chakraborty, Uttara Bogaerts, Wim Boning, Duane S. Microsystems Technology Laboratories Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Ghent University - IMEC Department of Information Technology Gent Belgium Center of Nano- and Biophotonics Ghent University Gent Belgium

Linear light processing functions (e.g., routing, splitting, filtering) are key functions requiring configuration to implement on a programmable photonic integrated circuit (PPIC). In recirculating waveguide meshes (which include loop-backs), this is usually done manually. Some previous results describe explorations to perform this task automatically, but their efficiency or applicability is still limited. In this paper, we propose an efficient method that can automatically realize configurations for many light processing functions on a square-mesh PPIC. At its heart is an automatic differentiation subroutine built upon analytical expressions of scattering matrices, that enables gradient descent optimization for functional circuit synthesis. Similar to the state-of-the-art synthesis techniques, our method can realize configurations for a wide range of light processing functions, and multiple functions on the same PPIC simultaneously. However, we do not need to separate the functions spatially into different subdomains of the mesh, and the resulting optimum can have multiple functions using the same part of the mesh. Furthermore, compared to non-gradient or numerical differentiation based methods, our proposed approach achieves 3x time reduction in computational cost. Copyright © 2022, The Authors. All rights reserved.

关键词： Mesh generation

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