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2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)最新文献

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The Influence of Metal Contact Surface Roughness on Third-Order Passive Intermodulation 金属接触面粗糙度对三阶无源互调的影响
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343583
Y. Li, Hao-Nan Zhou, Yang Shi, Chuang-Chuang Fang, W. Tian
{"title":"The Influence of Metal Contact Surface Roughness on Third-Order Passive Intermodulation","authors":"Y. Li, Hao-Nan Zhou, Yang Shi, Chuang-Chuang Fang, W. Tian","doi":"10.1109/NEMO49486.2020.9343583","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343583","url":null,"abstract":"This paper takes copper as the research object, aiming to study the influence of waveguide surfaces roughness and the thickness of the metal surface oxide layer on the Passive Intermodulation (PIM) powered. Starting with the change in shrinkage resistance caused by the deformation of the micro-convex body, two-dimensional and three-dimensional fractal geometric rough surface mathematical models through the W-M function are established. Moreover, the influence of fractal dimensions on the rough surface is analyzed. Then through the Metal-Medium-Metal structure formed by the waveguide connection, the equivalent circuit model is established, and the third-order PIM power is calculated. The results show that the PIM becomes more serious as the roughness of the contact surface increases, and the thickness of the oxide layer on the contact surface increases.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131670662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Ultra-broadband Linear Polarization Converter Based on Single-layer Reflective Metasurface 基于单层反射超表面的超宽带线性偏振变换器
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343609
Qin Zhou, Guo-hong Du, Dongdong Wang
{"title":"Ultra-broadband Linear Polarization Converter Based on Single-layer Reflective Metasurface","authors":"Qin Zhou, Guo-hong Du, Dongdong Wang","doi":"10.1109/NEMO49486.2020.9343609","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343609","url":null,"abstract":"In this paper, an ultra-broadband polarization converter based on single-layer reflective metasurface is proposed. The simulation results show that the polarization conversion ratio (PCR) is higher than 90% in the frequency range of 12.04 to 32.44GHz. Compared with the conventional polarization converter, the polarization converter presented in this paper has more advantages in terms of bandwidth and electrical dimension, and has great practicability and wide application prospect in the communication field.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127401655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Confidence Analysis Method for Cable Distributed Parameter Model based on Verification & Validation 基于验证的电缆分布参数模型置信度分析方法
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343647
Qians Liu, Longquan Zhong, Liping Yan, Xiang Zhao, Haijing Zhou
{"title":"Confidence Analysis Method for Cable Distributed Parameter Model based on Verification & Validation","authors":"Qians Liu, Longquan Zhong, Liping Yan, Xiang Zhao, Haijing Zhou","doi":"10.1109/NEMO49486.2020.9343647","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343647","url":null,"abstract":"An effective confidence analysis method for the cable distributed parameter model is proposed in this paper, while it is still a blank question at present. As the cable electromagnetic coupling model is composed of a transmission line model and a distributed parameter model, the proposed confidence analysis method takes two steps based on verification & validation (V&V) theory. One step is that confidence analysis of both models is completed by getting numerical calculation accuracy verified with numerical results and model accuracy validated with experiments results, to confirm the quantification of numerical calculation errors and model accuracy errors analysis. The other step is that the confidence analysis of the cable distributed parameter model must be established on the basis of that of the transmission line model. Such method is completed and confirmed with numerical and experimental examples in this paper. Further more, confirmed confidence of cable model leads to the validity of simulation data, which is an important mathematical foundation for simulation to produce practical results in cable layout engineering design and electromagnetic response evaluation.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115468718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-azimuth wide-band scattering characteristics analysis of large-scale targets on the sea 海上大型目标多方位宽带散射特性分析
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343407
Hao Wang, B. Wei, Wenwen Fan
{"title":"Multi-azimuth wide-band scattering characteristics analysis of large-scale targets on the sea","authors":"Hao Wang, B. Wei, Wenwen Fan","doi":"10.1109/NEMO49486.2020.9343407","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343407","url":null,"abstract":"In this paper, the TDSBR method based on closed-form integration is used to calculate the composite time-domain scattering characteristics of typical large marine targets. This method breaks through the limitation of traditional modeling methods on the size of modeling patches. It can perform fast calculations and then obtain the wide-band scattering characteristics of composite targets by Fourier transform. By analyzing the calculation results under different incident conditions, the effects of the coupled scattering between the target and the sea surface in the sea scene and the interaction between the rough sea surface and the incident wave on the target scattered echo are explored.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An Efficient Hybrid Method for the Optimization of Antenna Radiation Problems 天线辐射问题优化的一种高效混合方法
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343420
Weiwei Lei, Hanru Shao, Jian Wang, Jianfeng Dong
{"title":"An Efficient Hybrid Method for the Optimization of Antenna Radiation Problems","authors":"Weiwei Lei, Hanru Shao, Jian Wang, Jianfeng Dong","doi":"10.1109/NEMO49486.2020.9343420","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343420","url":null,"abstract":"In this paper, the scheme of model-order reduction (MOR) combined with tangential equivalence principle algorithm (T-EPA) is proposed to analyze the radiation problem of antennas in the vicinity of a large PEC plate. A limit number of orthogonal basis vectors can be obtained by performing randomized singular-value decomposition (RSVD) on the interaction matrix between the region of radiator and scatterer with a given truncation error. In this way, the wave input-output relation of the scatterer can be encapsulated into a reduced-order model (ROM) which can be pre-computed and reused when the position of the radiator is changed. Furthermore, discrete empirical interpolation method (DEIM) is applied to select interpolations on the scatterer to accelerate the filling of interaction matrices. Finally, the combination with T-EPA can reduce the density of unknowns on the radiator and improve the convergence of integral equations in such multi-scale radiation problems. Numerical results demonstrate the accuracy and efficiency of the proposed method.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124108739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent Advances in Deep Neural Network Technique for High-Dimensional Microwave Modeling 高维微波建模的深度神经网络技术研究进展
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343496
Jing Jin, F. Feng, W. Zhang, Jianan Zhang, Zhihao Zhao, Qi-jun Zhang
{"title":"Recent Advances in Deep Neural Network Technique for High-Dimensional Microwave Modeling","authors":"Jing Jin, F. Feng, W. Zhang, Jianan Zhang, Zhihao Zhao, Qi-jun Zhang","doi":"10.1109/NEMO49486.2020.9343496","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343496","url":null,"abstract":"This paper provides an overview of recent advances in deep neural network technique for high-dimensional microwave modeling. The hybrid deep neural network that employs both the sigmoid function and the smooth rectified linear unit (ReLU) as activation functions is used for microwave modeling in order to address the challenges due to high-dimensional inputs. A three-stage deep learning algorithm is used to train the deep neural network model. It can overcome the vanishing gradient problem for training the deep neural network. The deep neural network technique can solve microwave modeling problems in higher dimension than the shallow neural network method.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123634440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Simulation and Analysis of the Influence of External Cables on the Electromagnetic Radiation of the Electronic Equipment 外部电缆对电子设备电磁辐射影响的仿真与分析
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343478
Yu Guo, Kaicheng Hong, Wenchang Xu, Fengmei Li, Xuejun Liang, Jingkun Mao, Xiaohe Chen
{"title":"Simulation and Analysis of the Influence of External Cables on the Electromagnetic Radiation of the Electronic Equipment","authors":"Yu Guo, Kaicheng Hong, Wenchang Xu, Fengmei Li, Xuejun Liang, Jingkun Mao, Xiaohe Chen","doi":"10.1109/NEMO49486.2020.9343478","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343478","url":null,"abstract":"The external cable is a common and important part of the electronic equipment, such as the power cord, data cable, etc. The antenna effect of the external cable may weaken the electromagnetic compatibility (EMC) of the equipment. In this paper, FEKO is used to establish the simplified models of the shielding chassis, interference sources and cables. The solution method of multiconductor transmission line (MTL) in the simulation software is used to calculate the electromagnetic radiation intensity of the equipment with different interference sources and cables. According to the calculation results of the different models, the influence of the external cables on the radiation emission of the common mode and differential mode interference sources within the shielding case is analyzed. In addition, the effect of cable shielding on the inhibition of radiation emission induced by external cables is studied and analyzed. The results show that the cable shielding could be a good method to suppress radiation emission of differential mode interference in cable loop rather than the one of common mode.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129703077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Filtering Power Divider With Phase Shift Output 带相移输出的滤波功率分压器
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343597
Yi Cheng, Haoran Zhu, Zhixiang Huang, Xianliang Wu, Bo Wu
{"title":"Filtering Power Divider With Phase Shift Output","authors":"Yi Cheng, Haoran Zhu, Zhixiang Huang, Xianliang Wu, Bo Wu","doi":"10.1109/NEMO49486.2020.9343597","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343597","url":null,"abstract":"This paper presents a power divider which realizes the average energy distribution of input signals, a fixed phase difference of output signals and filtering. The signal interference technology is used to realize the filtering function. The input and output of the filter have a phase difference of 90°, with 70.7 ȍ port impedance, which replaces the traditional Wilkinson 1/4 wavelength transmission line. A rectangular slot is engraved on the ground below the coupling line to enhance coupling. The T-shaped open steep impedance resonator (SIR) loaded transmission line is used to achieve the phase shifter. The simulation results shows that the filtering bandwidth with 10 dB return loss is 32.7% and phase shifting is 30° ± 5°. The band isolation is better than -10 dB. Hence, the proposed structure is suitable for the application of single-layer circuitry integration.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"401 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128941836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast ISAR Image Simulation of Targets with Rough Boundary at Terahertz Frequencies 太赫兹粗糙边界目标快速ISAR图像仿真
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343472
Hui Chen, W. Yu, T. Cui
{"title":"Fast ISAR Image Simulation of Targets with Rough Boundary at Terahertz Frequencies","authors":"Hui Chen, W. Yu, T. Cui","doi":"10.1109/NEMO49486.2020.9343472","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343472","url":null,"abstract":"This paper provides a \"semi-deterministic\" description to realize fast simulation of the coherent and incoherent scattering of electrically large complex targets with rough boundary at THz bands. Combining with a ray-tube integration formula to generate inverse synthetic aperture radar (ISAR) images, a fast simulation method is presented to get large collection of ISAR patches of targets with rough boundary at arbitrary aspect angles by using the shooting and bouncing ray (SBR) method.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130243993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
OAM Multiplexing in Multipath Environment 多径环境下的OAM复用
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343479
Xiaoming Chen, Wei Xue
{"title":"OAM Multiplexing in Multipath Environment","authors":"Xiaoming Chen, Wei Xue","doi":"10.1109/NEMO49486.2020.9343479","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343479","url":null,"abstract":"Owing to the theoretically unlimited and orthogonal states of orbital angular momentum (OAM) beams, OAM technique has been widely applied in different areas. Considering the divergence, misalignment, and the interferences caused by multipath propagation, it is commonly believed that OAM-based multiplexing can only be applied in short-range line-of-sight (LoS) situation. Recently, it was experimental demonstrated that OAM multiplexing can deal with multipath effects by utilizing a proper spatial equalization. In this work, we analyzed OAM multiplexing in both rich isotropic multipath environment and arbitrary multipath environment. It is shown that in real-life multipath environment, OAM multiplexing offers comparable performance as conventional multiplexing, even performs better under certain conditions.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130289734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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