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2018 IEEE International Conference on Computational Electromagnetics (ICCEM)最新文献

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Design of a Compact Wideband Dual-Polarization Antipodal Vivaldi Antenna Array 紧凑型宽带双极化对足维瓦尔第天线阵列的设计
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496541
Lin Guo, Yunfei Qiang
{"title":"Design of a Compact Wideband Dual-Polarization Antipodal Vivaldi Antenna Array","authors":"Lin Guo, Yunfei Qiang","doi":"10.1109/COMPEM.2018.8496541","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496541","url":null,"abstract":"A compact wideband dual-polarization antipodal Vivaldi antenna is proposed in this paper. This proposed antenna mainly consists of two orthogonal antipodal Vivaldi antennas and one cross-shaped metal block. Each of the antipodal Vivaldi antennas with three layers of metal is etched on the two layers of substrates with a size of $38times 42times 1.5 text{mm}^{3}$. Moreover, the cross-shaped metal block with a height of 44 mm is mounted on the corner of the reflection ground plane in each periodic cell, which can fix these antennas enabling of guaranteeing the robustness of this proposed antenna. Obviously, compared to the traditional Vivaldi antenna, this proposed antenna is convenient to replace some elements if necessary. In additional, the simulated impedance bandwidth (active $text{VSWR} leq 3)$ for both horizontal polarization antenna and vertical polarization antenna is about 94.5%, ranging 1.2 GHz to 3.35 GHz, while the main beam is scanning from −45° to 45° in azimuth plane and from −30° to 30° in elevation plane. The detailed simulated results and analysis of the proposed conformal antenna array will be presented.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126218035","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: 12
Signal/Power Integrity Co-Simulation of DDR3 Memory Module DDR3内存模块信号/电源完整性联合仿真
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496538
Chao-Kai Chan, Tsun-Ming Wu, Meng-Lin Wu, Gang-Jhih Fan, C. Shiah, Nicky Lu, Tzong-Lin Wu
{"title":"Signal/Power Integrity Co-Simulation of DDR3 Memory Module","authors":"Chao-Kai Chan, Tsun-Ming Wu, Meng-Lin Wu, Gang-Jhih Fan, C. Shiah, Nicky Lu, Tzong-Lin Wu","doi":"10.1109/COMPEM.2018.8496538","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496538","url":null,"abstract":"In this paper, a simulation methodology considering signal integrity (SI) and power integrity (PI) from the chip, package, and board levels of a double-data-rate three (DDR3) memory module is presented. For SI issues, the chip-package-board simulation indicates how to improve eye diagram by eliminating non-ideal effects of the most crucial part of the channel. For PI issues, the SI/PI co-simulation is concerned with the power distribution network (PDN) and the distribution of decoupling capacitors (De-Caps). In addition, the optimized set of de-caps by simulation provides a cost-effect way to meet the desired target impedance for acceptable simultaneous switching noise (SSN) generated in PDN due to I/O switching. Finally, the co-simulation methodology can indicate SI/PI problems before IC tape-out and reduce circuit design cycle as well.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115268290","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: 7
Deep Learning of Raw Radar Echoes for Target Recognition 用于目标识别的原始雷达回波深度学习
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496666
Tian Tian Fan, Che Liu, T. Cui
{"title":"Deep Learning of Raw Radar Echoes for Target Recognition","authors":"Tian Tian Fan, Che Liu, T. Cui","doi":"10.1109/COMPEM.2018.8496666","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496666","url":null,"abstract":"Synthetic aperture radar (SAR) based classification approaches are commonly used methods for automatic target recognition. However, SAR imaging requires complex two-dimensional matched filtering and interpolation algorithms. In this paper, we propose deep learning technology for automatic target recognition based on raw radar echoes instead of SAR images. A modern convolutional neural network (CNN) model is trained directly by radar-echo training data set, and is evaluated on the testing data set. The experimental results show that the proposed method could achieve high accuracy and efficiency for the target recognition.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115225683","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
Efficient Analysis of Scattering from Inhomogeneous Dielectric Objects Using Volume Integral Equation with Higher-Order Prism Hierarchical Vector Basis Functions 基于高阶棱镜层次向量基函数的体积积分方程的非均匀介质散射分析
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496664
Xianjin Li, Jun Hu, M. Jiang, Z. Nie
{"title":"Efficient Analysis of Scattering from Inhomogeneous Dielectric Objects Using Volume Integral Equation with Higher-Order Prism Hierarchical Vector Basis Functions","authors":"Xianjin Li, Jun Hu, M. Jiang, Z. Nie","doi":"10.1109/COMPEM.2018.8496664","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496664","url":null,"abstract":"An efficient moment of method (MoM) for the solution of electromagnetic scattering from inhomogeneous dielectric objects is presented. This method is based on the higher-order volume integral equations (VIEs). Higher-order geometrical modeling and a new family of higher-order prism hierarchical divergence-conforming vector basis functions are used, and the simplified higher-order vector basis functions for inhomogeneous thin dielectric objects are proposed. By comparison, we can see that the time consumption and memory cost are reduced and the convergence becomes better by the simplified basis functions. Numerical experiments are show to illustrate the validity and efficiency of the proposed method.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122246212","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
Active Frequency Selective Surfaces Based on Loaded Ring Patches 基于负载环片的主动频率选择曲面
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496480
Francisco J. Lagunes Vez, J. Rodríguez-Cuevas, A. E. Martynyuk, J. I. Martínez-López
{"title":"Active Frequency Selective Surfaces Based on Loaded Ring Patches","authors":"Francisco J. Lagunes Vez, J. Rodríguez-Cuevas, A. E. Martynyuk, J. I. Martínez-López","doi":"10.1109/COMPEM.2018.8496480","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496480","url":null,"abstract":"This paper presents an X-band active frequency selective surface (FSS) based on metal rings loaded with varactor diodes. The FSS unit cell that contains the loaded metal ring resonator is modeled using both an equivalent electrical circuit and a commercially-available full-wave solver. The resonant frequency of the ring is tuned by changing the varactor's capacitance due to the different reverse-bias voltages applied to the varactor diodes. It is shown that these capacitor values in the range from 30 to 65 pF shift the resonant frequency of the FSS from 9.17 to 8.33 GHz. The proposed geometry can be used as an electronically-tunable band-stop FSS.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122072220","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
Application of Gradient Learning Scheme to Pixel-Based Inversion for Transient EM Data 梯度学习方法在瞬态电磁数据像元反演中的应用
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496518
Rui Guo, Maokun Li, Fan Yang, Shenheng Xu, G. Fang, A. Abubakar
{"title":"Application of Gradient Learning Scheme to Pixel-Based Inversion for Transient EM Data","authors":"Rui Guo, Maokun Li, Fan Yang, Shenheng Xu, G. Fang, A. Abubakar","doi":"10.1109/COMPEM.2018.8496518","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496518","url":null,"abstract":"Traditional gradient descent inversion for transient electromagnetic (TEM) data is time and memory comsuming because the derivative matrices need to be computed repeatly. In this paper, we apply the Supervised Descent Method (SDM) into pixel-based inversion for TEM data. This method is based on the concept of gradient learning. In an offline stage, the average descent direction can be learned from a set of training data; and in an online stage, data inversion can be achieved by the learned descent directions without computing the derivative matrices. Numerical tests verify that this algorithm converges faster and is also more efficient. Moreover, SDM offers a more convinient way to incorporate prior information into inversion that could improve the efficiency of data interpretation.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123157032","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: 7
Feasibility Study of Acoustic Imaging for Human Thorax Using Contrast Source Inversion 对比源反演用于人体胸部声学成像的可行性研究
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496627
Xiaoqian Song, Maokun Li, Fan Yang, Shenheng Xu, A. Abubakar
{"title":"Feasibility Study of Acoustic Imaging for Human Thorax Using Contrast Source Inversion","authors":"Xiaoqian Song, Maokun Li, Fan Yang, Shenheng Xu, A. Abubakar","doi":"10.1109/COMPEM.2018.8496627","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496627","url":null,"abstract":"In this paper, we study an acoustic imaging method based on contrast source inversion and its feasibility in quantitatively reconstructing the thorax compressibility and qualitatively reconstructing the thorax attenuation and density. The existence of gradient and divergence operator in the acoustic wave equation makes the relationship between the contrast and the total pressure highly nonlinear. To reduce this nonlinearity, we introduce two contrast sources to ensure the symmetry of the equation, such that the inverse problem can be solved efficiently using conjugate gradient method. Moreover, to improve the stability of the algorithm, we applied the multiplicative regularization scheme with two additive regularization factors. Numerical results show that the acoustic parameters of human thorax can be properly reconstructed at frequency of tens of kHz using this inverse algorithm.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124604466","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
Applying the Multiple Scattering (MS) Method to Evaluate the Current Response on a Cable Harness Due to an Incident Plane Wave 应用多重散射(MS)方法评估平面波入射下电缆束上的电流响应
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496504
Yansheng Wang, Y. S. Cao, Dazhao Liu, R. Kautz, N. Altunyurt, J. Fan
{"title":"Applying the Multiple Scattering (MS) Method to Evaluate the Current Response on a Cable Harness Due to an Incident Plane Wave","authors":"Yansheng Wang, Y. S. Cao, Dazhao Liu, R. Kautz, N. Altunyurt, J. Fan","doi":"10.1109/COMPEM.2018.8496504","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496504","url":null,"abstract":"In this paper, the MS method is applied to solve an immunity problem of harness-body co-simulation. In this immunity problem, the structure under study consists of two parts: the cable harness part (harness) and the metal surface part (body). The harness is solved using the generalized multiconductor transmission-line (GMTL) solver and the body is solved using the mixed-potential integral equation (MPIE) solver. The interactions between the harness and the body are achieved through a series of iterations called MS. The calculation results show good correlation with the reference results, which validates the accuracy of the MS method.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116215455","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
Design of a Low Profile Omnidirectional Circular Polarized Reconfigurable Antenna for Beidou Application 北斗低轮廓全向圆极化可重构天线设计
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496559
Dan Tang, X. Kong, Shaobin Liu
{"title":"Design of a Low Profile Omnidirectional Circular Polarized Reconfigurable Antenna for Beidou Application","authors":"Dan Tang, X. Kong, Shaobin Liu","doi":"10.1109/COMPEM.2018.8496559","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496559","url":null,"abstract":"A low profile omnidirectional circular polarized reconfigurable antenna for Beidou application is proposed in this paper. This antenna is based on the first-order resonance mode of epsilon negative transmission line. To form a circularly polarized wave in the far field, the vertical and horizontal polarization is generated by a parallel circular cavity and three dual arc arms, respectively. Only 6 PIN diodes are needed to alter the left-handed circularly polarized (LHCP) or righthanded circularly polarized (RHCP) omnidirectional radiation state. Three-dimensional electromagnetic simulation software Ansoft HFSS and RF circuit simulation software Agilent ADS are used for co-simulation and optimization. It is shown that the proposed antenna can meet the Beidou navigation BDS-l S band requirement well whether at the left or right circularly polarized state. The omnidirectional average axial ratio at two states are 1.24 dB and 1.25 dB with 16.7 % and 19.8 % 3 dB axial ratio bandwidth, respectively. The thickness of antenna is only 2 mm (0.016 λ0) and simply processed without a dual feeding structure and 90 phase shifter.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132262132","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
Compact Differentially-Fed Rectangular-Ring Microstrip Antenna 紧凑型差分馈电矩形环形微带天线
2018 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2018-03-26 DOI: 10.1109/COMPEM.2018.8496467
Hao Xu, Sheng Sun, Yi-Yao Hu
{"title":"Compact Differentially-Fed Rectangular-Ring Microstrip Antenna","authors":"Hao Xu, Sheng Sun, Yi-Yao Hu","doi":"10.1109/COMPEM.2018.8496467","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496467","url":null,"abstract":"In this paper, a design of compact differentially-fed rectangular-ring microstrip antenna is proposed. In order to effectively excite the dominant TM01 mode, two feed points are chosen with an offset from the symmetric axis. The simulation indicates that the resonance of the TM01 mode occurs at 4.395 GHz, which results in a maximum gain of 7.53 dBi. Benefited from the differential signal operation, a relatively weak cross-polarization can be achieved.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121781373","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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