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2024 International Applied Computational Electromagnetics Society Symposium, ACES-China 2024

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

ISBN: (纸本)9798350355581

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. © 2024 IEEE.

关键词： Surface plasmon resonance

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An enhanced flexible triboelectric tactile sensor for material classification and roughness recognition

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Science China(Technological Sciences) 2025年第4期68卷 94-104页

作者： Jingchao YUAN Jian HE Junbin YU Shuai SHI Yanxiang CHANG Xiujian CHOU Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan030051China Shanxi Key Laboratory of Ferroelectric Physical Micro-nano Devices and Systems North University of ChinaTaiyuan030051China

Tactile sensors are one of the core components for intelligent robots to realize human-like tactile sensing *** the application scenarios of material classification and roughness recognition,an enhanced flexible triboelectric tactile sensor(FTTS)is proposed in this *** FTTS is prepared based on a single-electrode triboelectric nanogenerator(SETENG),which generates the corresponding electrical signals by coming in contact with *** enhance the properties of the SE-TENG,the synergistic enhancement effect on the electrical output of the SE-TENG was explored by controlling the addition ratio of MXene and Carboxylated cellulose nanofibers(CNF-C).The charge-trapping mechanism of the chargetrapping layer was analyzed,and the effects of the type and thickness of the charge-trapping layer on the performance of the FTTS were systematically *** and simple fabricated braided microstructures were prepared using the template method,which showed the optimum capability in terms of self-cleaning and electrical output *** these improvements,the FTTS showed a voltage sensitivity of 2.88 V/10^(4)Pa in the pressure response range of 10-400 kPa,a linearity of 0.993,and a linear trend in the fitting *** the same time,the FTTS has a stable response frequency,fast response time,and extreme cycling stability(over 10000 cycles).In addition,in terms of roughness recognition,the FTTS can accurately recognize samples with different surface *** terms of material classification,the accuracy of classifying 11materials with the visual geometry group(VGG)network reaches 96.08%.Based on these findings,FTTS-based tactile sensors offer diverse options in the future direction of electronic skin and tactile sensing.

关键词： single-electrode triboelectric nanogenerator tactile sensor self-cleaning VGG network material classification roughness recognition

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MIMO performance enhancement of MIMO arrays using PCS-based near-field optimization technique

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Science China(Information Sciences) 2023年第6期66卷 170-185页

作者： Yipeng WANG Xiaoming CHEN Huiling PEI Wei E.I.SHA Yi HUANG Ahmed A.KISHK School of Information and Communications Engineering Xi'an Jiaotong University Key Laboratory of Micro-Nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science and Electronic EngineeringZhejiang University Department of Electrical Engineering and Electronics University of Liverpool Department of Electrical and Computer Engineering Concordia University

Extensive efforts have been made in designing large multiple-input multiple-output(MIMO)arrays. Nevertheless, improvements in conventional antenna characteristics cannot ensure significant MIMO performance improvement in realistic multipath environments. Array decorrelation techniques have been proposed, achieving correlation reductions by either tilting the antenna beams or shifting the phase centers away from each other. Hence, these methods are mainly limited to MIMO terminals with small arrays. To avoid such problems, this work proposes a decorrelation optimization technique based on phase correcting surface(PCS)that can be applied to large MIMO arrays, enhancing their MIMO performances in a realistic(non-isotropic)multipath environment. First, by using a near-field channel model and an optimization algorithm, a near-field phase distribution improving the MIMO capacity is obtained. Then the PCS(consisting of square elements)is used to cover the array's aperture, achieving the desired near-field phase *** examples demonstrate the effectiveness of this PCS-based near-field optimization technique. One is a1 × 4 dual-polarized patch array(working at 2.4 GHz)covered by a 2 × 4 PCS with 0.6λ center-to-center distance. The other is a 2 × 8 dual-polarized dipole array, for which a 4 × 8 PCS with 0.4λ center-to-center distance is designed. Their MIMO capacities can be effectively enhanced by 8% and 10% in single-cell and multi-cell scenarios, respectively. The PCS has insignificant effects on mutual coupling, matching, and the average radiation efficiency of the patch array, and increases the antenna gain by about 2.5 dB while keeping broadside radiations to ensure good cellular coverage, which benefits the MIMO performance of the *** proposed technique offers a new perspective for improving large MIMO arrays in realistic multipath in a statistical sense.

关键词： antenna correlation array antenna multiple-input multiple-output (MIMO) capacity

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A kirigami-based reconfigurable metasurface for selective electromagnetic transmissionmodulation

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npj Flexible electronics 2024年第1期8卷 408-416页

作者： Shuchang He Chengjun Wang Jie Tao Haishan Tang Zuojia Wang Jizhou Song Huanjiang Laboratory Department of Engineering MechanicsSoft Matter Research CenterKey Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceState Key Laboratory of Brain-Machine IntelligenceZhejiang UniversityZhejiangChina International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang ProvinceZhejiang UniversityZhejiangChina Department of Rehabilitation Medicine The First Affiliated Hospital School of MedicineZhejiang UniversityZhejiangChina

Tunable three-dimensional(3D)electromagnetic metasurfaces are essential for achieving selective modulation of polarized waves,but they usually require complex designs and the use of smart materials,posing great implementation ***,we propose a novel kirigami-based reconfigurable electromagnetic metasurface,which consists of a kirigami-based deformable thin polyimide substrate and periodically arranged copper split-ring *** simple stretch,the twodimensional(2D)planar metasurface can be uniformly transformed into a 3D state,enabling it to effectively and selectively modulate linearly and circularly polarized *** and numerical results reveal the mechanical deformation and transmission characteristics of the metasurface under applied *** is shown that the metasurface exhibits good selective transmission tunability while the resonant frequency remains basically unchanged for both transverse electric and transverse magnetic polarized ***,the selective tuning mechanism and the influence of geometrical parameters are also illustrated by the equivalent circuit analysis.

关键词： polarized transverse unchanged

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Reconfigurable Three-Dimensional Thermal Dome

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Engineering 2025年第3期46卷 236-244页

作者： Yuhong Zhou Fubao Yang Liujun Xu Pengfei Zhuang Dong Wang Xiaoping Ouyang Ying Li Jiping Huang State Key Laboratory of Surface Physics&Key Laboratory of Micro-and Nano-Photonic Structures(Ministry of Education) Department of PhysicsFudan UniversityShanghai 200438China Graduate School of China Academy of Engineering Physics Beijing 100193China International Joint Innovation Center The Electromagnetics Academy at Zhejiang UniversityZhejiang UniversityHaining 314400China State Key Laboratory of Extreme Photonics and Instrumentation&Key Laboratory of Advanced Micro-Nano Electronic Devices and Smart Systems and Applications of Zhejiang Province Zhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China

Thermal metamaterial represents a groundbreaking approach to control heat conduction,and,as a crucial component,thermal invisibility is of utmost importance for heat *** the flourishing development of thermal invisibility schemes,they still face two limitations in practical ***,objects are typically completely enclosed in traditional cloaks,making them difficult to use and unsuitable for objects with heat ***,although some theoretical proposals have been put forth to change the thermal conductivity of materials to achieve dynamic invisibility,their designs are complex and rigid,making them unsuitable for large-scale use in real threedimensional(3D)***,we propose a concept of a thermal dome to achieve 3D *** scheme includes an open functional area,greatly enhancing its usability and *** features a reconfigurable structure,constructed with simple isotropic natural materials,making it suitable for dynamic *** performance of our reconfigurable thermal dome has been confirmed through simulations and experiments,consistent with the *** introduction of this concept can greatly advance the development of thermal invisibility technology from theory to engineering and provide inspiration for other physical domains,such as direct current electric fields and magnetic fields.

关键词： Thermal domes Reconfigurable metamaterials Three-dimensional invisibility

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A Miniaturized Absorber for Radiation Suppression in the Chip Package 7

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

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7th IEEE International Symposium on Electromagnetic Compatibility, ISEMC 2023

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

ISBN: (纸本)9798350333107

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 0.08λL× 0.08λL(λL 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 (S11-10dB) 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. © 2023 IEEE.

关键词： Dielectric materials

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Design of Wideband Electromagnetic Absorbers Based on Deep Learning 6

Design of Wideband Electromagnetic Absorbers Based on Deep L...

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6th International Conference on Robotics, Intelligent Control and Artificial Intelligence, RICAI 2024

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

ISBN: (纸本)9798331541699

This paper presents a deep learning-based multilayer perceptron (MLP) neural network approach for the design and optimization of electromagnetic absorbers operating in the 20-30 GHz frequency range. This method offers significant advantages in terms of miniaturization and wide bandwidth. By training the MLP neural network, the absorber structure is automatically optimized within this frequency band. The predicted results are in strong agreement with full-wave simulation outcomes. The findings demonstrate that this approach effectively enhances absorber efficiency, providing a novel solution for electromagnetic compatibility and stealth technology applications. © 2024 IEEE.

关键词： Stealth technology

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Suppression of inner energy dissipation in Yb-doped NaErF_(4)upconversion nanocrystals through an energy cycling strategy

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Journal of Rare Earths 2023年第7期41卷 975-980,I0001页

作者： Yunfeng Bai Xiaoxi Liu Shaojian Zhang Haili Jiang Lu Liu Isam Ud Din Jianzhong Zhang Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems School of Electronic Information and EngineeringYangtze Normal UniversityChongqing 408100China College of Physics and Optoelectronic Engineering Harbin Engineering UniversityHarbin 150001China

Suppression of the inner energy dissipation,related to the lattice phonons and inner defects,in lanthanide doped upco nversion luminescent materials remains a formidable ***,we reveal an energy cycling strategy capable of suppressing the inner energy dissipation in lanthanide doped upconversion ***^(3+)ions were introduced in Er^(3+)heavily doped nanocrystals as an energy reservoir to compete with the inner energy *** detailed energy cycling processes between Er^(3+)activator and Yb^(3+)reservoir,responsible for the enhancement of Er^(3+)upconversion intensity,are proposed and further verified on the basis of spectral *** energy cycling strategy,with unique merits like facile and cost-effective preparation as well as broad scope of application,is highly valuable in lanthanide luminescent nano materials.

关键词： Upconversion Er^(3+) 1530 nm excitation Inner energy dissipation Energy cycling Rare earths

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A Novel 3-D Frequency Selective Surface With Ultrawide Passband and High Selectivity 11

A Novel 3-D Frequency Selective Surface With Ultrawide Passb...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： An, Xiaodong Xie, Jialong Li, Da Fan, Yudi Li, Erping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou310000 China

ISBN: (纸本)9798350326277

In this paper, a novel 3-dimensional (3-D) frequency selective surface (FSS) structure with ultrawide passband and high selectivity is proposed. Compared to traditional two-dimensional (2-D) wideband structures, (3-D) structures offer enhanced selectivity but exhibit higher insertion loss in the passband. Moreover, three-dimensional structures are often more complex and challenging to manufacture. This paper proposes a simplified three-layer structure. When vertically incident, the FSS exhibits a -3 dB bandwidth of 8-18.4 GHz with a relative bandwidth of 78.7%. Additionally, it forms a stopband with a suppression level exceeding -10 dB within the frequency range of 0-5.2 GHz. In the TE mode, the FSS maintains excellent operational performance within an incident angle range of 0-40 degrees. © 2023 IEEE.

关键词： frequency selective surface passband wideband

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A Detection Method Combining Machine Vision And Resistance Analysis for the Wiring Harnesses of Refrigerator Temperature Sensors

IAENG International Journal of Computer Science

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IAENG International Journal of Computer Science 2024年第6期51卷 703-708页

作者： Huang, Shijian Ding, Shiyin Yuan, Shengzhao Li, Mingming Tan, Yong Yue, Fan Dang, Suihu Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems School of Electronic Information and Engineering Yangtze Normal University Chongqing China Yangtze Normal University Chongqing China School of Electronic & information Engineering Chongqing Three Gorges University Chongqing China

It is the refrigerator that is frequently used in homes. Freezing and refrigerating temperature sensors are significant temperature-sensing components in the refrigerator. However, it is simple to insert the temperature sensor wires erroneously during the manufacturing process. Currently, there is no effective method to detect the correctness of the wiring harnesses. We propose a novel detection method that combines machine vision and resistance analysis for the wiring harnesses of refrigerator temperature sensors. We utilized machine vision technology to determine the color and insertion position of each wire in the wiring harnesses. We distinguish the types of sensors by analyzing the resistance range of the temperature sensors. We combine two approaches to detect the wiring harnesses connecting the temperature sensors. The experimental results demonstrate that the proposed method can effectively detect the correctness of the wiring harnesses connecting the temperature sensors, and the accuracy reaches 99.19%. The proposed method has a good generalization in other electrical wiring harness detection problems. © (2024), (International Association of Engineers). All rights reserved.

关键词： Refrigerators

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