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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Chen, Quankun Li, Da Tao, Tuomin Ma, Hanzhi Li, Erping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

Spike neural networks (SNNs) have gained growing attention, and the temporal encoding methods for the signal input are also crucial. Among these encoding algorithms, a suitable and simple encoding method not only affects the performance of the SNNs but also relates to the expansion in hardware. Several high-performance and easily realized encoding algorithms are discussed in this paper. © 2022 IEEE.

关键词： Network coding

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Electromagnetic Wave Dispersion Curve Computation for Quasi-1D Spoof Surface Plasmon Polaritons

Electromagnetic Wave Dispersion Curve Computation for Quasi-...

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Jiefeng Zhou Ling Zhang Da Li Er-Ping Li Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems and Applications Zhejiang University Hangzhou China

ISBN: (数字)9798350355581

ISBN: (纸本)9798350355598

The quasi-one-dimensional (quasi-1D) spoof surface plasmon polariton (SSPP) provides a new route for optically transparent electronic devices. The dispersion curves can control the electromagnetic wave propagation characteristics of the quasi-1D SSPP by manipulating the geometric parameters. However, the dispersion curves of quasi-1D SSPP have not been analytically derived and thoroughly studied. This paper derives the dispersion curves of the quasi-1D SSPP using equivalent permittivity and permeability methods, which can accurately predict the relationship between wave number and its geometric parameters. The simulation results validate the proposed dispersion curves. Based on the dispersion curves, this paper further presents a broadband optically transparent transmission line, which can achieve high-efficiency transmission from 3.0 to 14.4 GHz.

关键词： Surface plasmon polaritons Simulation Electromagnetic waveguides Geometrical optics Broadband communication Permittivity Dispersion Optical devices Optical waveguides Substrates

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A Complementary Electromagnetic Paradigm for Collaborative Autonomous Vehicles 13

A Complementary Electromagnetic Paradigm for Collaborative A...

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Li, Ruifeng Liang, Xinglei Zhang, Ling Li, Da Li, Er-Ping Zhejiang University College of Information Science & Electronic Engineering The Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications Hangzhou310027 China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

With the development of 5G communication and the continuous upgrading of AI algorithms, the realization of collaborative autonomous vehicles (CAVs) is gradually becoming possible. The perception layers of the current CAVs detect information mainly through simultaneous positioning and mapping (SLAM) and prior maps. However, SLAM requires exhaustive computing resources, and prior maps cannot cope with time-varying electromagnetic environments. Therefore, a complementary electromagnetic paradigm for CAVs is proposed, and a simple demo of this paradigm is created using commercial radio frequency identification (RFID) tags. Specifically, this paper takes vehicle localization as a specific application scenario in the absence of GNSS information, showing the great potential of applying this complementary electromagnetic paradigm to the decision layer of CAVs based on electromagnetic characteristic analysis. © 2022 IEEE.

关键词： Autonomous vehicles

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Phase-Locking Diffusive Skin Effect

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Chinese Physics Letters 2022年第5期39卷 94-99页

作者： Pei-Chao Cao Yu-Gui Peng Ying Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and TechnologyWuhan 430074China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Scientifc and Technological Innovation CenterZhejiang UniversityHangzhou 310027China International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangThe Electromagnetics Academy at Zhejiang UniversityZhejiang UniversityHaining 314400China Jinhua Institute of Zhejiang University Zhejiang UniversityJinhua 321099China

We explore the exceptional point(EP)induced phase transition and amplitude/phase modulation in thermal diffusion *** start from the asymmetric coupling double-channel model,where the temperature field is unbalanced in the amplitude and locked in the symmetric *** extending into the one-dimensional tight-binding non-Hermitian lattice,we study the convection-driven phase locking and the asymmetric-couplinginduced diffusive skin effect with the high-order EPs in static *** convection and asymmetric couplings,we further show the phase-locking diffusive skin *** work reveals the mechanism of controlling both the amplitude and phase of temperature fields in thermal coupling systems and has potential applications in non-Hermitian topology in thermal diffusion.

关键词： effect coupling asymmetric

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Coupling Path Identification of Conducted EMI in a High-Voltage Discharging Circuit Using Near-Field Scanning 15

Coupling Path Identification of Conducted EMI in a High-Volt...

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15th International Conference on microwave and Millimeter Wave Technology, ICMMT 2023

作者： Xie, Yu-Ting Zhang, Ling Chen, Jun-Hui Li, Da Yang, Zhen-Zhong Li, Er-Ping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications College of Information Science and Electronic Engineering Hangzhou China China Academy of Engineering Physics Institute of Electronic Engineering Mianyang China

ISBN: (纸本)9798350338874

Electromagnetic interference (EMI) problems are common and can severely affect the normal function of high-voltage discharge circuits. This paper investigates the EMI issue in a dual-channel high-voltage discharge system, where the high-voltage discharging current of one circuit causes the false triggering of the other low-voltage triggering circuit. To effectively analyze the EMI coupling path, the near-field scanning (NFS) technique is adopted to capture and visualize the current flow path in the discharging process. A useful subtraction method is proposed to eliminate the radiated EMI from the high-voltage discharging current and better visualize the conducted EMI current. According to the NFS results after the subtraction process, the conducted EMI current coupling path can be straightforwardly obtained, and the corresponding mitigation approaches are demonstrated to solve the EMI problem effectively. © 2023 IEEE.

关键词： Timing circuits

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Modeling and Analysis of a Large-Scale Memristor Crossbar Array for Neuromorphic Chip 9

Modeling and Analysis of a Large-Scale Memristor Crossbar Ar...

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9th IEEE International Symposium on microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2022

作者： Fang, Lidan Li, Yan Li, Erping China Jiliang University Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province Zhejiang China Key Laboratory of Advanced Micro-Nano Electronic Devices & Smart Systems and Applications Zhejiang China

ISBN: (数字)9781665427753

ISBN: (纸本)9781665427753

This paper presents a complete equivalent circuit model of a large memristor crossbar array, including parasitic capacitance, inductance, and resistance. By changing the rise time of the input signal and monitoring the output voltage of different output ports, signal integrity (SI) problems such as crosstalk, and IR voltage drop in the memristor crossbar array are analyzed. The simulation results show that with the decrease of the rise time, the electromagnetic effect will become obvious, which will lead to the crosstalk ripple and distortion of the output signal becoming serious. And as the output port moves away from the input, the IR voltage drop increases with the increase of the coupling elements. This will point the direction for improving the performance of memristor crossbar arrays. Furthermore, different from conventional signals, we propose to simulate spiking signals using the Izhikevich neuron model for more accurate analysis. © 2022 IEEE.

关键词： Memristors

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Hybrid Signal Integrity Modeling and Analysis of Heterogeneous Integrated System With Neuromorphic Darwin Chip

IEEE Transactions on Signal and Power Integrity

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IEEE Transactions on Signal and Power Integrity 2024年 3卷 37-46页

作者： Chen, Quankun Ma, Hanzhi Li, Da Tao, Tuomin Tan, Shurun Liu, En-Xiao Schutt-Aine, Jose Li, Er-Ping Zhejiang University Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems and Applications College of Information Science and Electronic Engineering Hangzhou310027 China Zhejiang University University of Illinois at Urbana-Champaign Institute Haining314400 China A∗star Institute of High Performance Computing Singapore138632 Singapore University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering UrbanaIL61820 United States

This article introduces a comprehensive approach for designing and analyzing signal integrity in heterogeneous integrated systems that incorporate neuromorphic Darwin chips. The proposed integrated system architecture includes a neuromorphic Darwin chip, digital signal processing unit, microcontroller unit, field programmable gate arrays, and coding and decoding modules to encode and reconstruct analog spiking signals. The study evaluates the encoding module and the heterogeneous integration structure and conducts signal integrity analysis. To achieve optimal signal integrity performance, the article proposes a novel binocular eye diagram analysis technique. This innovative approach guides the encoding algorithm modification and improves the overall system performance. This research is the first to combine joint field-circuit simulation, heterogeneous integration modeling, and signal integrity analysis of the Darwin neuromorphic chip, and it is expected to serve as a valuable reference for future studies on similar systems. © 2022 IEEE.

关键词： Neural networks

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A fast method of irregular MIMO antenna far-field pattern based on characteristic mode analysis

A fast method of irregular MIMO antenna far-field pattern ba...

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IEEE International Wireless Symposium (IWS)

作者： Jialong Xie Ruifeng Li Jinyan Ma Da Li Er-Ping Li The Zhejiang Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications College of Information Science and Electronic Engineering Zhejiang University Hangzhou China

ISBN: (数字)9798350389999

ISBN: (纸本)9798350390001

A fast method for calculating the pattern of irregular MIMO antennas based on characteristic mode analysis and coupling matrix is presented in this paper. The radiation characteristics of each antenna are characterized by the characteristic mode analysis, and the interaction between antenna elements is characterized by the establishment of array coupling matrix. Unlike traditional simulation software that requires time-consuming re-modeling for each structural variation, our method only needs to modify the array coupling matrix to quickly solve the array antenna pattern. Two examples of irregular dipole antenna array and patch antenna array are used to verify the method, which demonstrate our method's ability to achieve high precision in significantly less time than conventional methods.

关键词： Couplings Wireless communication Dipole antennas Patch antennas Software Characteristic mode analysis Antenna arrays Antenna radiation patterns

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Autonomous aeroamphibious invisibility cloak with stochastic-evolution learning

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advanced Photonics 2024年第1期6卷 64-72页

作者： Chao Qian Yuetian Jia Zhedong Wang Jieting Chen Pujing Lin Xiaoyue Zhu Erping Li Hongsheng Chen Zhejiang University ZJU-UIUC InstituteInterdisciplinary Center for Quantum InformationState Key Laboratory of Extreme Photonics and InstrumentationHangzhouChina Zhejiang University ZJU-Hangzhou Global Science and Technology Innovation CenterKey Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of ZhejiangHangzhouChina Zhejiang University Jinhua Institute of Zhejiang UniversityJinhuaChina

Being invisible ad libitum has long captivated the popular imagination,particularly in terms of safeguarding modern high-end instruments from potential *** ago,the advent of metamaterials and transformation optics sparked considerable interest in invisibility cloaks,which have been mainly demonstrated in ground and waveguide ***,an omnidirectional flying cloak has not been achieved,primarily due to the challenges associated with dynamic synthesis of metasurface *** demonstrate an autonomous aeroamphibious invisibility cloak that incorporates a suite of perception,decision,and execution modules,capable of maintaining invisibility amidst kaleidoscopic backgrounds and neutralizing external *** physical breakthrough lies in the spatiotemporal modulation imparted on tunable metasurfaces to sculpt the scattering field in both space and frequency *** intelligently control the spatiotemporal metasurfaces,we introduce a stochastic-evolution learning that automatically aligns with the optimal solution through maximum probabilistic *** a fully self-driving experiment,we implement this concept on an unmanned drone and showcase adaptive invisibility in three canonical landscapes-sea,land,and air-with a similarity rate of up to 95%.Our work extends the family of invisibility cloaks to flying modality and inspires other research on material discoveries and homeostatic meta-devices.

关键词： intelligent metasurfaces optical materials and structures deep learning

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A Miniaturized Absorber for Radiation Suppression in the Chip Package

A Miniaturized Absorber for Radiation Suppression in the Chi...

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IEEE International Symposium on Electromagnetic Compatibility (EMC-Beijing)

作者： Chaolong Lin Jiaqi Xing Da Li Er-Ping Li The Zhejiang Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications Zhejiang University Hangzhou China

In this page, a miniaturized absorber with ultrawide absorption band is designed and applied for radiation leakage suppression in the chip package. The proposed unit is a double-layer structure with two patterned resistive films of ITO etched on top of the dielectric substrate. The patterned layer is composed of a meandering square ring and a centric circular patch which enhances the coupling within the unit and facilitates the miniaturization of the structure. The size of the unit is $0.08\lambda_{\mathrm{L}}\times 0.08\lambda_{\mathrm{L}}(\lambda_{\mathrm{L}}$ is the wavelength in the free space of the lowest absorption frequency). When the periodic boundary condition is set in the simulation, it shows a broad absorption band $(\mathrm{S}_{11}\leq-10\text{dB})$ covering 23.8-40 GHz. This unit is then used as a square ring structure for radiation suppression in chip package which demonstrates a −10dB bandwidth within 25.5-39.5 GHz.

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