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2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)最新文献

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Fabrication of a double-layer corporate-feed waveguide slot array by powder metal laser process 用粉末金属激光工艺制备双层波导波导槽阵
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995662
J. Hirokawa, Satoshi Ito, Satoshi Suetsugu, Miao Zhang, M. Ando
{"title":"Fabrication of a double-layer corporate-feed waveguide slot array by powder metal laser process","authors":"J. Hirokawa, Satoshi Ito, Satoshi Suetsugu, Miao Zhang, M. Ando","doi":"10.1109/NEMO.2014.6995662","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995662","url":null,"abstract":"The double-layer corporate-feed hollow waveguide slot array antenna with 12×16 elements is fabricated by the powder metal laser process in the 60 GHz band. The symmetrical feed circuit for 12×16 elements is designed by introducing cross junctions and asymmetrical T-junction. We design that the bandwidth for VSWR less than 1.2 is 9.63% and the maximum deviation from 58 GHz to 65 GHz is 1.34 dB in amplitude and 11.6 degrees in phase among all the output ports. The powder metal laser process can fabricate antennas with isolated etching patterns and multilayer structures regularly. The measured directivity of the copper antenna is comparable to the designed one by reflecting good near-field distribution within 5 dB amplitude and 60-degree phase variation. The estimated overall conductor loss is about 2 dB in the copper antenna in the measurement. A rectangular cavity resonator in a waveguide is introduced to evaluate the effective conductivity of aluminum by the powder metal laser process.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116635316","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: 5
Analysis of a terahertz resonator using an efficient LOD-FDTD method with a PEC boundary condition 用带PEC边界条件的高效LOD-FDTD方法分析太赫兹谐振器
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995663
J. Shibayama, S. Ozaki, H. Nakano, J. Yamauchi
{"title":"Analysis of a terahertz resonator using an efficient LOD-FDTD method with a PEC boundary condition","authors":"J. Shibayama, S. Ozaki, H. Nakano, J. Yamauchi","doi":"10.1109/NEMO.2014.6995663","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995663","url":null,"abstract":"A terahertz (THz) resonator composed of parallel metal plates with gratings is analyzed using the locally one-dimensional finite-difference time-domain (LOD-FDTD) method with a perfect electric conductor (PEC) boundary condition. A defect section is introduced into the gratings, yielding a strong resonance in the band gap of the gratings. A shift of the resonance frequency caused by a large time step size can be compensated with the help of the dispersion control parameters. The computation time of the PEC-LOD-FDTD is reduced to only 35% of that of the traditional explicit FDTD.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115526362","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
Full-wave analysis and equivalent circuit modeling of substrate integrated waveguide (SIW) circuits 衬底集成波导(SIW)电路的全波分析和等效电路建模
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995656
M. Bozzi, L. Perregrini, K. Wu
{"title":"Full-wave analysis and equivalent circuit modeling of substrate integrated waveguide (SIW) circuits","authors":"M. Bozzi, L. Perregrini, K. Wu","doi":"10.1109/NEMO.2014.6995656","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995656","url":null,"abstract":"The modeling and design of substrate integrated waveguide (SIW) circuits requires sophisticated electromagnetic solvers, which provide reliable results, fast computing time, and high flexibility to fully exploit the potential of SIW technology. This paper presents the outline of the full-wave analysis of SIW circuits by the Boundary Integral-Resonant Mode Expansion (BI-RME) method. In addition, the derivation of multimodal and parametric equivalent circuit modeling of SIW discontinuities. The use of equivalent circuit models is particularly useful for the fast design of SIW circuits, as well as for the sensitivity and yield analysis.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123656794","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: 4
Adaptive multi-level uniform space partitioning algorithm for high-frequency electromagnetics simulations based on ray tracing 基于射线追踪的高频电磁仿真自适应多级均匀空间划分算法
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995667
F. Weinmann
{"title":"Adaptive multi-level uniform space partitioning algorithm for high-frequency electromagnetics simulations based on ray tracing","authors":"F. Weinmann","doi":"10.1109/NEMO.2014.6995667","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995667","url":null,"abstract":"This paper presents a volumetric space partitioning algorithm which can be used for accelerating high-frequency electromagnetic (EM) simulations based on a Shooting-and-Bouncing-Rays (SBR) algorithm. The goal of this algorithm is to minimize the number of ray-surface intersection tests. While the application of space partitioning is rather common in ray tracing EM simulations as well as in computer science, an adaptive multi-level extension of the volumetric space partitioning scheme is proposed here. The multi-level space partitioning algorithm only requires the maximum allowed number of geometric elements inside a volumetric space partition and adaptively creates the space partitioning grid according to the object studied in the simulation, i.e. according to the distribution of geometric elements. The results show that runtimes can easily be reduced by 50% when applying this optimization algorithm.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122783315","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
Dispersion characteristic a periodic substrate integrated waveguide of parallel metallic plates 平行金属板周期性衬底集成波导的色散特性
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995693
Xinru Li, Ching-Kuang C. Tzuang, Hsien-Shun Wu
{"title":"Dispersion characteristic a periodic substrate integrated waveguide of parallel metallic plates","authors":"Xinru Li, Ching-Kuang C. Tzuang, Hsien-Shun Wu","doi":"10.1109/NEMO.2014.6995693","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995693","url":null,"abstract":"This paper presents the dispersion characteristic of a substrate integrated waveguide (SIW) of parallel metallic plates. The hybrid generalized scattering matrix and finite-element method (GSM/FEM) method accurately depicting the fields inside the rectangular waveguide section, transitions, and external parallel-plate region. The presented method establishes a rigorous approach to tackle the periodic structure. The dispersion propagation characteristics extracted by the hybrid GSM/FEM method show a region of complex modes between 49 GHz and 52.5GHz. Preliminary study of this complex modes region indicates the mode-coupling of the space harmonics leads to the interesting phenomenon, displaying a null transmission of the SIW TE10 mode. The theoretical three-dimensional electromagnetic field analyses confirmed the null transmission.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132245958","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: 4
A discontinuous finite element time-domain solver for nanophotonic applications 纳米光子应用的不连续有限元时域求解器
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995664
S. Lanteri, Raphaël Léger, J. Viquerat, C. Scheid
{"title":"A discontinuous finite element time-domain solver for nanophotonic applications","authors":"S. Lanteri, Raphaël Léger, J. Viquerat, C. Scheid","doi":"10.1109/NEMO.2014.6995664","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995664","url":null,"abstract":"We present a discontinuous finite element time-domain solver for the computer simulation of the interaction of light with nanometer scale structures. The method relies on a compact stencil high order interpolation of the electromagnetic field components within each cell of an unstructured tetrahedral mesh. This piecewise polynomial numerical approximation is allowed to be discontinuous from one mesh cell to another, and the consistency of the global approximation is obtained thanks to the definition of appropriate numerical traces of the fields on a face shared by two neighboring cells. Time integration is achieved using an explicit scheme and no global mass matrix inversion is required to advance the solution at each time step. Moreover, the resulting time-domain solver is particularly well adapted to parallel computing. In this paper, we discuss about recent contributions for improving the accuracy, flexibility and efficiency of the method, as well as its adaptation to physical models relevant to nanophotonic applications.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131645443","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
Nonlinear behavioral models of HEMTs using response surface methodology 基于响应面方法的hemt非线性行为模型
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995706
P. Barmuta, G. P. Gibiino, F. Ferranti, A. Lewandowski, D. Schreurs
{"title":"Nonlinear behavioral models of HEMTs using response surface methodology","authors":"P. Barmuta, G. P. Gibiino, F. Ferranti, A. Lewandowski, D. Schreurs","doi":"10.1109/NEMO.2014.6995706","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995706","url":null,"abstract":"In this paper, the response surface methodology is proposed to model nonlinear microwave devices using different sampling techniques. Each of the methods represents a distinct approach: exploration-oriented (Voronoi tessellation), nonlinearity-exploitation-oriented (LOcal Linear Approximation) and model-error-minimization-oriented. This allows to build accurate and compact global behavioral models of drain voltage at different harmonics of a 0.15 μm GaAs HEMT transistor with only few hundreds of samples. After choosing the best sampling technique, two types of global models are compared: Radial Basis Function and Kriging. It is shown that the modeling convergence depends on the model type, and better results are obtained using the Kriging model.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115390300","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
On the role of evolutionary optimization within the System-by-Design approach for EM device synthesis 演化优化在电磁器件合成系统设计方法中的作用
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995682
A. Massa, P. Rocca, G. Oliveri
{"title":"On the role of evolutionary optimization within the System-by-Design approach for EM device synthesis","authors":"A. Massa, P. Rocca, G. Oliveri","doi":"10.1109/NEMO.2014.6995682","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995682","url":null,"abstract":"This paper is aimed at analyzing and discussing the key-role of the evolutionary optimization in EM device synthesis carried out within the recently developed System-by-Design paradigm. Towards this end, SbD models the design process as an eco-system of functional blocks (for the synthesis/analysis of each sub-part of the overall complex system) suitably connected to enable different trade-off solutions in terms of complexity, speed, effectiveness, and reliability. To give some insights on the role of EAs in the proposed methodology, the SbD Paradigm is here exploited in a specific design problem concerned with the synthesis of a wideband Wide-Angle Impedance Matching (WAIM) layer for improving the scanning performance of a phased array system.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124872427","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: 2
Magnetic probe factor with consideration of probe tilt for near-field measurement 近场测量中考虑探头倾斜的磁探头因子
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995695
Kai-Syuan Chen, T. Horng
{"title":"Magnetic probe factor with consideration of probe tilt for near-field measurement","authors":"Kai-Syuan Chen, T. Horng","doi":"10.1109/NEMO.2014.6995695","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995695","url":null,"abstract":"This paper presents a frequency and space dependent analytical model of near-field magnetic probe factor with probe tilt angle for measuring electromagnetic emissions. The principle and derivation of the probe factor are elucidated. The vector-network-analyzer (VNA) measurement of the probe factor is also introduced. The correlation between the measured and calculated probe factors is finally demonstrated.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127532130","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
Modeling of organic millimeterwave fishnet metamaterial structures 有机毫米波鱼网超材料结构建模
2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO) Pub Date : 2014-05-14 DOI: 10.1109/NEMO.2014.6995714
J. Russer, Ying Xiong, P. Russer
{"title":"Modeling of organic millimeterwave fishnet metamaterial structures","authors":"J. Russer, Ying Xiong, P. Russer","doi":"10.1109/NEMO.2014.6995714","DOIUrl":"https://doi.org/10.1109/NEMO.2014.6995714","url":null,"abstract":"Organic materials allow to adjust the area resistance of conductive layers for optimum broad-band design. Three-dimensional metamaterials based on stacked fishnet structures can be realized by spray coating using carbon nanotube (CNT) pigment inks. The use of lossy thin films enhances the bandwidth of negative refractive index for fishnet structures and the ability to tune the sheet resistance allows for an increased flexibility in the design of metamaterial structures. A lumped element equivalent circuit model of a fishnet metamaterial cell is presented and numerical studies are pursued in this contribution to investigate fishnet metamaterial using nano pigment inks.","PeriodicalId":273349,"journal":{"name":"2014 International Conference on Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122322504","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
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