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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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Wideband Circularly Polarized Millimeter Wave Dielectric Resonator Antenna with defected ground structure for 5G Communications 5G通信中带缺陷接地结构的宽带圆极化毫米波介质谐振器天线
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343497
Abinash Gaya, M. Jamaluddin, Ayman Abdulhadi Althuwayb
{"title":"Wideband Circularly Polarized Millimeter Wave Dielectric Resonator Antenna with defected ground structure for 5G Communications","authors":"Abinash Gaya, M. Jamaluddin, Ayman Abdulhadi Althuwayb","doi":"10.1109/NEMO49486.2020.9343497","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343497","url":null,"abstract":"A wideband Right hand circular polarized (RHCP) millimeter wave dielectric resonator antenna (DRA) has been designed here for 5G frequency bands of band 30. A band width of 2.36GHz centered at 26GHz is observed. The simulated gain of the antenna is 5dB and the polarization bandwidth at 3dB is 1.2GHz. The circularly polarized DRA designed here is right hand circularly polarized and is excited with the mode TE1y2. The probe fed technique used here offers wide bandwidth which makes the antenna more suitable for 5G applications. The microstrip coupled technique is used here with a defected ground structure to minimize the back propagation. A conformal strip is used to reduce the air gap between the DRA and the probe.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"65 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":"115613869","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
Multi-objective optimization design of a multilayer radar absorbing material 多层雷达吸波材料的多目标优化设计
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343449
Liang Dong, Yun Wang, Haixiong Zhu, Jianwei Wu, W. Gu, Qingjie Meng
{"title":"Multi-objective optimization design of a multilayer radar absorbing material","authors":"Liang Dong, Yun Wang, Haixiong Zhu, Jianwei Wu, W. Gu, Qingjie Meng","doi":"10.1109/NEMO49486.2020.9343449","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343449","url":null,"abstract":"In this paper, the multi-objective optimization design of a multilayer radar absorbing material (MRAM) is demonstrated. Firstly, the MRAM’s fast calculation algorithm is proposed and validated to be in a good agreement with the commercial electromagnetic computing software. Secondly, by combining the MRAM’s fast calculation algorithm and the NSGA-2 algorithm, a thin, lightweight and fine absorbing performance MRAM is optimized.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"53 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":"127537071","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
Thermal Analysis of Electron Gun for Terahertz Traveling Wave Tubes Based on L-BFGS Algorithm 基于L-BFGS算法的太赫兹行波管电子枪热分析
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343503
Yue Ou, Wenxin Liu, Longlong Yang, Zhengyuan Zhao, Yanyu Wei, Ziqiang Yang
{"title":"Thermal Analysis of Electron Gun for Terahertz Traveling Wave Tubes Based on L-BFGS Algorithm","authors":"Yue Ou, Wenxin Liu, Longlong Yang, Zhengyuan Zhao, Yanyu Wei, Ziqiang Yang","doi":"10.1109/NEMO49486.2020.9343503","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343503","url":null,"abstract":"In this article, we propose a classical optimization algorithm named L-BFGS to simulate the thermal behavior of electron gun for terahertz traveling-wave tubes. The L-BFGS algorithm, as a variation of Quasi-Newton optimization method, expert in dealing with the unconstrained optimization problems while keeping the stability of the calculation. Efficiency and accuracy of L-BFGS algorithm are verified by modeling the thermal behavior of an actual electron gun on MATLAB platform successfully with no breakdown. According to the simulation results, this method performs better than some reference methods in terms of computational memory usage and time cost. Our numerical conclusions indicate that it is promising for thermal analysis of electron gun, which would be useful for researchers during the design phase.","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":"125499116","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
Design and Optimization of FBAR Filter Using Acoustic-Electromagnetic Coupling Model and MBVD Model 基于声电磁耦合模型和MBVD模型的FBAR滤波器设计与优化
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343531
Shitao Chen, Qiupeng Yin, Cong Hu, Zhixiang Huang
{"title":"Design and Optimization of FBAR Filter Using Acoustic-Electromagnetic Coupling Model and MBVD Model","authors":"Shitao Chen, Qiupeng Yin, Cong Hu, Zhixiang Huang","doi":"10.1109/NEMO49486.2020.9343531","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343531","url":null,"abstract":"In this paper, the acoustic-electromagnetic coupling model and modified Butterworth Van-Dyke (MBVD) model are combined to design and optimize a 2.07GHz film bulk acoustic resonator (FBAR) filter. The 3 dB bandwidth of the FBAR filter is 0.08 GHz, from 2.03 GHz to 2.11 GHz. The maximum ripple is -0.45 dB in the pass-band and two transmission zeros have been introduced at 2 GHz and 2.15 GHz, so the out of band suppression of the filter is improved. The MBVD model and acoustic-electromagnetic coupling model are implemented by commercial software ADS and COMSOL, respectively. The correlated optimization parameters of these two models are built by the computational formula of static capacitance. Finally, the optimization parameters of MBVD model are brought into the acoustic-electromagnetic coupling model. The accuracy of the final optimization parameters is verified by the comparison of these two models. The proposed optimization method is more efficiency than direct optimization in COMSOL.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"11 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":"114884389","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
Electromagnetic Scattering from Rough Sea Surfaces Contaminated by Oil Spills 受石油泄漏污染的粗糙海面的电磁散射
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343615
R. Wu, Shanshan Wang, Pengju Yang
{"title":"Electromagnetic Scattering from Rough Sea Surfaces Contaminated by Oil Spills","authors":"R. Wu, Shanshan Wang, Pengju Yang","doi":"10.1109/NEMO49486.2020.9343615","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343615","url":null,"abstract":"As a theoretical basis for remote sensing of marine oil spills, electromagnetic scattering signatures of radar echoes from contaminated sea surfaces are investigated in this paper. Numerical simulations show that at normal incidence the angular distribution of bistatic scattering intensity of contaminated sea surface is more concentrated and higher than that of clean sea surface, and that at moderate incidence angles the backscattering intensity is reduced, which is qualitatively consistent with measurements.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"26 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":"122331230","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
An Efficient iterative MoM-PO Hybrid Method for Calculating Scattered Fields of the Multiscale and Multiphysics Scatterers 计算多尺度多物理场散射场的一种高效迭代MoM-PO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/NEMO49486.2020.9343657
Zhiyang Xue, Yu Mao Wu, Yaqiu Jin
{"title":"An Efficient iterative MoM-PO Hybrid Method for Calculating Scattered Fields of the Multiscale and Multiphysics Scatterers","authors":"Zhiyang Xue, Yu Mao Wu, Yaqiu Jin","doi":"10.1109/NEMO49486.2020.9343657","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343657","url":null,"abstract":"Facing the problem of multi-scale electromagnetic calculation, the method of moment (MoM) and physical optics (PO) hybrid (MoM-PO) method is introduced to get the efficient electromagnetic simulation. This method is based on the iterative technology between the MoM region and PO region. Finally, numerical experiments from the electrically large and multi-scale scatterers are provided to benchmark the efficiencies of the MoM-PO hybrid method.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"5 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":"116816077","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
Design of a stealth and lightweight underwater vehicle mast 隐身轻型水下航行器桅杆设计
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343470
Liang Dong, Yun Wang, Haixiong Zhu, Jianwei Wu, W. Gu, Qingjie Meng
{"title":"Design of a stealth and lightweight underwater vehicle mast","authors":"Liang Dong, Yun Wang, Haixiong Zhu, Jianwei Wu, W. Gu, Qingjie Meng","doi":"10.1109/NEMO49486.2020.9343470","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343470","url":null,"abstract":"In this paper, the design of a stealth and lightweight underwater vehicle mast is demonstrated. Firstly, a corrugated shape is designed to reduce the radar cross section (RCS). By optimizing the angle and depth parameter of the corrugated shape, a 26 dB RCS reduction is obtained. Secondly, a type of structural radar absorbing material (SRAM) is used, which can not only absorb incident wave, but also bear loading. By laying SRAM on the corrugated shape, a 23.7 dB RCS reduction is achieved. Finally, in order to reduce weight, the steel material is substituted by composite material, which can achieve 47% weight reduction.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"7 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":"128980019","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
Simulation of EM Scattering from Nonlinear Sinusoidal Sea Waves Modulated by Hydrodynamic Effect in Nearshore Region 近岸区水动力效应调制的非线性正弦海浪电磁散射模拟
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343553
D. Nie, Hangyu Ren, Hui Wang, Min Zhang
{"title":"Simulation of EM Scattering from Nonlinear Sinusoidal Sea Waves Modulated by Hydrodynamic Effect in Nearshore Region","authors":"D. Nie, Hangyu Ren, Hui Wang, Min Zhang","doi":"10.1109/NEMO49486.2020.9343553","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343553","url":null,"abstract":"The analysis of the electromagnetic scattering from the nonlinear waves modulated by hydrodynamic effect in nearshore region was presented. The analytical second-order small slope approximation (SSA-2) was applied to investigating the scattering features of the simulated waves which are more realistic than the traditional nearshore waves with constant water depth. The numerical results showed more higher-order harmonic wave scattering features that traditional waves did not presented. The study will be helpful to further probe the nearshore waves scattering.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"65 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":"129665803","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
The Validation of the Simulated HIRF Effects in Metallic Cases Using Parallel FDTD Solver on a High Performance Computer 用并行时域有限差分求解器在高性能计算机上对金属壳中高频场效应的模拟验证
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343661
Yueqian Wu, Qingwei Liu, Han-Yu Li, Xianfeng Bao, Haijing Zhou, W. Yin
{"title":"The Validation of the Simulated HIRF Effects in Metallic Cases Using Parallel FDTD Solver on a High Performance Computer","authors":"Yueqian Wu, Qingwei Liu, Han-Yu Li, Xianfeng Bao, Haijing Zhou, W. Yin","doi":"10.1109/NEMO49486.2020.9343661","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343661","url":null,"abstract":"To accurately predict High Intensity Radiated Field (HIRF) effects in various systems is highly required for most commercial as well as defense applications, which is mainly based on electromagnetic simulation. Further, the validation of the simulated HIRF effects at different levels is also required. However, it is often difficult and needs some appropriate techniques and facilities. Here, in-house developed parallel Finite-Difference Time-Domain (FDTD) solver is at first employed for simulating the HIRF effects of two metallic cases with multiple slots and apertures, which is carried out on a high performance computer with tens of thousands of processors. The uncertainty analysis of the incident plane wave angle related to the electric field distribution in the metallic cases is finished with the help of non-intrusive polynomial chaos (NIPC) method, and the feature selective validation (FSV) is performed to quantify the difference between the measured and simulated field results. It is shown that the results obtained from the FSV method provide high reliability and confidence for our numerical characterization of HIRF effects in the metallic cases and even other complex structures.","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":"129908368","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
Electromagnetic Pulse Response Characteristics of AgNWs@SiO2/PVA Composites AgNWs@SiO2/PVA复合材料的电磁脉冲响应特性
2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) Pub Date : 2020-12-07 DOI: 10.1109/NEMO49486.2020.9343484
Zhaoming Qu, Min Zhao, Yang Yuan, Xiaoning Sun, Shukun Gao
{"title":"Electromagnetic Pulse Response Characteristics of AgNWs@SiO2/PVA Composites","authors":"Zhaoming Qu, Min Zhao, Yang Yuan, Xiaoning Sun, Shukun Gao","doi":"10.1109/NEMO49486.2020.9343484","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343484","url":null,"abstract":"The materials with electrical-field induced nonlinear conductive characteristics for adaptive electromagnetic pulse (EMP) protection are strongly desired. In this paper, the core-shell hybrid nanoparticles of SiO2-decorated silver nanowire hybrids (AgNWs@SiO2) were synthesized via a sol-gel process employed in a polyvinyl alcohol (PVA) matrix material to prepare composites. The characterizations test indicates that the AgNWs were coated with silica and the hybrid particles were dispersed uniformly in matrix. The EMP response characteristics of samples with different filling concentrations under the square-wave were obtained. The results show that the voltage amplitude of output waveform is attenuated obviously, and a reflected waveform appears, which indicates that the resistivity of the sample decreases sharply induced by strong EMP. The mechanism of the EMP response characteristic of the composites was discussed, which verified the application prospects in the fields of adaptive EMP protection.","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":"130549223","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
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