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

作者： Xie, Jialong An, Xiaodong Li, Da Ma, Hanzhi 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

ISBN: (纸本)9798350326277

A novel miniaturized zigzag hexagonal frequency selective surface (FSS) element is proposed, where the structure has a dual-polarized angular stable passband. The FSS resonates at 4.0GHz, with a 3 dB passband spanning from 3.1 GHz to 4.72GHz, accommodating both transverse electric (TE) and transverse magnetic (TM) polarizations. Impressively, even at a 60° incidence angle, the shift in the transmission zero for the TE polarized wave is a mere 0.3%, demonstrating notable stability in terms of polarization and angular response. © 2023 IEEE.

关键词： frequency selective surface (FSS) high angle stability passband.

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Black-hole-inspired thermal trapping with graded heat-conduction metadevices

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National Science Review 2023年第2期10卷 131-138页

作者： Liujun Xu Jinrong Liu Peng Jin Guoqiang Xu Jiaxin Li Xiaoping Ouyang Ying Li Cheng-Wei Qiu Jiping Huang Department of Physics State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (MOE) Fudan University Department of Electrical and Computer Engineering National University of Singapore Graduate School of China Academy of Engineering Physics School of Materials Science and Engineering Xiangtan University Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang University International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang The Electromagnetics Academy of Zhejiang University Zhejiang University

The curved space-time produced by black holes leads to the intriguing trapping *** far,metadevices have enabled analogous black holes to trap light or sound in laboratory ***,trapping heat in a conductive environment is still challenging because diffusive behaviors are *** by black holes,we construct graded heat-conduction metadevices to achieve thermal trapping,resorting to the imitated advection produced by graded thermal conductivities rather than the trivial solution of using insulation materials to confine thermal *** experimentally demonstrate thermal trapping for guiding hot spots to diffuse towards the *** heat-conduction metadevices have advantages in energy-efficient thermal regulation because the imitated advection has a similar temperature field effect to the realistic advection that is usually driven by external energy *** results also provide an insight into correlating transformation thermotics with other disciplines,such as cosmology,for emerging heat control schemes.

关键词： thermal trapping graded metadevices imitated advection

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A knowledge-inherited learning for intelligent metasurface design and assembly

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Light(Science & Applications) 2023年第4期12卷 680-690页

作者： Yuetian Jia Chao Qian Zhixiang Fan Tong Cai Er-Ping Li Hongsheng Chen ZJU-UIUC Institute Interdisciplinary Center for Quantum InformationState Key Laboratory of Extreme Photonics and InstrumentationZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab.of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangZhejiang UniversityHangzhou 310027China Jinhua Institute of Zhejiang University Zhejiang UniversityJinhua 321099China Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China Shaoxing Institute of Zhejiang University zhejiang UniversityShaoxing321000China

Recent breakthroughs in deep learning have ushered in an essential tool for optics and photonics,recurring in various applications of material design,system optimization,and automation *** learning-enabled on-demand metasurface design has been the subject of extensive expansion,as it can alleviate the time-consuming,low-efficiency,and experience-orientated shortcomings in conventional numerical simulations and physics-based ***,collecting samples and training neural networks are fundamentally confined to predefined individual metamaterials and tend to fail for large problem *** by object-oriented C++programming,we propose a knowledge-inherited paradigm for multi-object and shape-unbound metasurface inverse *** inherited neural network carries knowledge from the"parent"metasurface and then is freely assembled to construct the"offspring"metasurface;such a process is as simple as building a container-type *** benchmark the paradigm by the free design of aperiodic and periodic metasurfaces,with accuracies that reach 86.7%.Furthermore,we present an intelligent origami metasurface to facilitate compatible and lightweight satellite communication *** work opens up a new avenue for automatic metasurface design and leverages the assemblability to broaden the adaptability of intelligent metadevices.

关键词： breakthrough consuming shortcomings

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EMI Radiation Prediction of Packages Based on Convolution Neural Network

EMI Radiation Prediction of Packages Based on Convolution Ne...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

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

ISBN: (纸本)9781733509657

With the increase of the current operating frequency, the electromagnetic interference (EMI) problem of extra-highspeed electronic equipment and systems becomes more and more complex, and the traditional analysis and design methods cannot efficiently deal with the current EMI problems. Therefore, this paper proposes a method of predicting electromagnetic radiation using a two-dimensional (2-D) convolutional neural network (CNN) in deep learning. This method can quickly and accurately predict the maximum 3-m pin map (PINMAP) package radiation electric field. By comparing the prediction results with the full-wave simulation results, both results are in good agreement, and the CNN prediction time is at the millisecond level. Therefore, the method that can accurately and effectively predict the radiation value has been verified. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Signal interference

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Design of a Double-layer Miniaturized Metamaterial Absorber in 5G Millimeter-wave Band 15

Design of a Double-layer Miniaturized Metamaterial Absorber ...

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

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

ISBN: (纸本)9798350338874

A double-layer miniaturized metamaterial absorber based on the indium-tin-oxide (ITO) resistive film in a 5G millimeter-wave band is proposed in this paper. Its core structure is implemented by two layers. The first layer is a glass substrate with ITO resistive film attached, and another ITO is attached to the FR-4 substrate in the second layer. The simulation results reveal that under the conditions of transverse electric or transverse magnetic polarization, the absorption efficiency of the designed structure exceeds 90% in the bandwidth of 23.3GHz ~ 35.2GHz, and reaches the peak of nearly 100% at the resonant point of 28GHz. Further analysis shows that the absorption performance of the incident angle from 0° to 40° can reach more than 90% in the operating frequency, which is relatively stable. © 2023 IEEE.

关键词： Tin oxides

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Two-Dimensional Thermal Regulation Based on Non-Hermitian Skin Effect

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Chinese Physics Letters 2023年第10期40卷 83-88页

作者：黄强开来刘云开曹培超祝雪丰李鹰 Interdisciplinary Center for Quantum Information State Key Laboratory of Extreme Photonics and InstrumentationZJU-Hangzhou Global Scientific and Technological Innovation CenterCollege of Information Science&Electronic EngineeringZhejiang UniversityHangzhou 310027China International Joint Innovation Center The Electromagnetics Academy at Zhejiang UniversityZhejiang UniversityHaining 314400China Key Laboratory of Advanced Micro/Nano Electronic Devices&Smart Systems of Zhejiang Jinhua Institute of Zhejiang UniversityZhejiang UniversityJinhua 321099China Shaoxing Institute of Zhejiang University Zhejiang UniversityShaoxing 312000China School of Physics and Innovation Institute Huazhong University of Science and TechnologyWuhan 430074China

The non-Hermitian skin effect has been applied in multiple ***,there are relatively few models in the field of thermal diffusion that utilize the non-Hermitian skin effect for achieving thermal ***,we propose two non-Hermitian Su-Schrieffer-Heeger(SSH)models for thermal regulation:one capable of achieving edge states,and the other capable of achieving corner states within the thermal *** analyzing the energy band structures and the generalized Brillouin zone,we predict the appearance of the non-Hermitian skin effect in these two ***,we analyze the time-dependent evolution results and assess the robustness of the *** results indicate that the localized thermal effects of the models align with our *** a word,this work presents two models based on the non-Hermitian skin effect for regulating the thermal field,injecting vitality into the design of non-Hermitian thermal diffusion systems.

关键词： Hermitian Skin utilize

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Superscattering of water waves

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National Science Review 2023年第7期10卷 91-97页

作者： Zijian Qin Chao Qian Lian Shen Xiaoping Wang Ido Kaminer Hongsheng Chen Huaping Wang Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang Province Institute of Marine Electronics Engineering Ocean College Zhejiang University ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab.of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University ZJU-UIUC Institute Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation Zhejiang University Jinhua Institute of Zhejiang University Zhejiang University Department of Electrical Engineering Technion-Israel Institute of Technology

Inspired by the concept of superscattering in optics,we for the first time theoretically predict and experimentally demonstrate the superscattering phenomenon in water *** subwavelength superscatterer is constructed by multi-layered concentric cylinders with an inhomogeneous depth *** superscatterer breaks the long-held single-channel scattering limit by several times and thus significantly enhances the total scattering *** underlying mechanism originates from the near degeneracy of the resonances of multiple *** fabricate the superscatterer prototype and experimentally measure the near-field patterns,which are consistent with theoretical prediction and numerical *** study opens a new avenue to strengthen water-wave scattering and deepen the understanding in water waves,which can be useful for ocean energy harvesting and harbor protection.

关键词： superscattering water wave metamaterials

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Broadband Continuous Complex Propagation Constant Extraction for Differential Transmission Lines

Broadband Continuous Complex Propagation Constant Extraction...

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IEEE International Wireless Symposium (IWS)

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

ISBN: (数字)9798350389999

ISBN: (纸本)9798350390001

The complex propagation constants are critical parameters to characterize the differential transmission lines. However, the numerical illness and the assignment of eigenvalues significantly impact the extraction accuracy of the complex propagation constants. This paper presents an automatic method for extracting the broadband complex propagation constants of differential transmission lines. The proposed method can accurately determine the distribution of the eigenvalues and distinguish the differential mode and common mode. Additionally, the method can eliminate the discontinuity points of the attenuation constants by measuring several transmission lines with different lengths. The effectiveness and reliability are validated by the full-wave simulation method in the frequency range of 0.01-130 GHz.

关键词： Wireless communication Power transmission lines Simulation Attenuation measurement Transmission line measurements Attenuation Eigenvalues and eigenfunctions Broadband communication Calibration Propagation constant

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Measurement Error Detection for Calibration Standards Based on Cluster Analysis

Measurement Error Detection for Calibration Standards Based ...

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European Conference on microwave

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

ISBN: (数字)9782874870774

ISBN: (纸本)9798350385892

This paper presents an automatic measurement error detection method for calibration standards in the vector network analyzer (VNA) calibration process using Density-Based Spatial Clustering of Applications with Noise (DBSCAN). Measurement errors of calibration standards occurring during the VNA calibration process are challenging to detect artificially, which can significantly deteriorate the final calibration results. The proposed method combines the 16-term error model calibration algorithm with DBSCAN, which can automatically identify the calibration standards with measurement errors. The calculation results of the 16-term error model using different calibration standard combinations are regarded as cluster samples. Calibration standards with measurement errors are detected by identifying the noisy outlier samples. The effectiveness and reliability of this method are validated by on-wafer S-parameter measurements.

关键词： microwave measurement Measurement errors Measurement uncertainty Noise Machine learning microwave theory and techniques Vectors Calibration Scattering parameters Standards

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Bayesian Machine Learning for Extracting Parasitic Parameters of GSG Calibration Standards 13

Bayesian Machine Learning for Extracting Parasitic Parameter...

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

作者： Zhou, Jiefeng Zhang, Ling Li, Da Chen, Junhui Wu, Chenghan Jiang, Li Li, Er-Ping Zhejiang University College of Information Science and Electronic Engineering The Zhejiang Key Laboratory of Advanced Micro Nano Electronic Devices & Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

This paper proposes a method to extract the parasitic parameters of the calibration standards by using the Bayesian optimization algorithm. After several rounds of optimization, the parasitic parameters are optimized so that the calculated value is closest to the full-wave simulation value. The advantage is that only one S-parameter of a known device needs to be used to obtain the parasitic parameters of all calibration standards. Compared with traditional measurement methods, it has the advantages taking less measurement times and coverage of frequency bandwidth. To prove the validity of the technique, the S-parameter of the 4mm microstrip line was simulated as a reference. The extracted parasitic parameters were used in the 16-term error model, the calibration and simulation results are in good agreement up to 100GHz. © 2022 IEEE.

关键词： Scattering parameters

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