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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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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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Deep Reinforcement Learning-Based Pin Map Optimization of BGA Package for EMC

Deep Reinforcement Learning-Based Pin Map Optimization of BG...

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

作者： Song, Ruyi Xu, Ruifeng Gu, Zheming Li, Er-Ping Advanced Micro/Nano Electronic Devices and Smart Systems and Applications the College of Isee Zhejiang University Hangzhou China

ISBN: (纸本)9781733509657

The radiation from the solder balls in the Ball Grid Array (BGA) packaging has become one of the main sources of electromagnetic leaks, and the pin mapping significantly impacts the package's electromagnetic compatibility (EMC). In this paper, a deep reinforcement learning (DRL)-based pin distribution optimization is proposed. Combined with the VBGT-Matrix fast calculation method, it can learn the radiation characteristics of various environments through self-training and then produce targeted pin map solutions. The outcome demonstrates that the optimization algorithm has fast speed and low power consumption, verifying the design expertise of the present industry and providing additional design insights. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Reinforcement learning

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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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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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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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2-Port GSG Probe Calibration Using TRL and 16-Term Error Model Up to 100GHz 13

2-Port GSG Probe Calibration Using TRL and 16-Term Error Mod...

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

作者： Chen, Junhui Zhang, Ling Li, Da Zhou, Jiefeng Wu, Chenghan Jiang, Li Li, Er-Ping Zhejiang University 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 introduces two calibration methods - Thru-Reflect-Line (TRL) and 16-term error model - and explores the influence of crosstalk errors of different intensities on the calibration accuracy of the two methods through full-wave simulation. The 2-port network is calibrated up to 100GHz by TRL and 16-term error model respectively through the GSG probe and calibration standards. When there is strong crosstalk between the two ports, the calibration accuracy of TRL will be deteriorated, while using the 16-term error model for calibration can effectively improve the calibration accuracy when there is a strong crosstalk error. When the crosstalk intensity is small, the accuracy of the 16-term error model is also slightly higher than that of TRL. © 2022 IEEE.

关键词： Crosstalk

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A Novel Miniaturized Zigzag Hexagonal Frequency Selective Surface 11

A Novel Miniaturized Zigzag Hexagonal Frequency Selective Su...

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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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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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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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