Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496615
Lijuan Shi, Ziwei Yan, Lixia Yang
The implementation of total-field/scattered-field (TF/SF) boundary for finite-difference time-domain (FDTD) method based upon FCC grids was proposed in this paper. The update equations of the electric and magnetic field components on the TF/SF boundary are derived. The effectiveness of the TF/SF boundary is verified by simulating the amplitude distribution of the vertical and oblique incident plane waves in the whole calculation region. This research can provide necessary basis for further analyzing electromagnetic scattering of targets using FDTD method based upon FCC grids.
{"title":"Implementation of TF/SF Boundary for FDTD Method on Face-Centered-Cubic (FCC) Grids","authors":"Lijuan Shi, Ziwei Yan, Lixia Yang","doi":"10.1109/COMPEM.2018.8496615","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496615","url":null,"abstract":"The implementation of total-field/scattered-field (TF/SF) boundary for finite-difference time-domain (FDTD) method based upon FCC grids was proposed in this paper. The update equations of the electric and magnetic field components on the TF/SF boundary are derived. The effectiveness of the TF/SF boundary is verified by simulating the amplitude distribution of the vertical and oblique incident plane waves in the whole calculation region. This research can provide necessary basis for further analyzing electromagnetic scattering of targets using FDTD method based upon FCC grids.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116858831","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496530
Pengbo Zhu, Dawei Song, S. Tao, Rushan Chen
In order to extract the target's geometric electromagnetic characteristics effectively from the radar echo, this paper proposes a fast feature parameter extraction method of attributed scattering center model. We use the orthogonal matching pursuit (OMP) algorithm to estimate the attributed scattering center model. In the process of OMP algorithm, the RELAX algorithm is used to correct the extracted signal components. Compared with the traditional super-resolution algorithm based on point-scattering model, this algorithm can effectively solve the problem of discontinuity of components. And it is more accurate to describe the geometric features and position of the target.
{"title":"Target Recognition Based on Attributed Scattering Center Models","authors":"Pengbo Zhu, Dawei Song, S. Tao, Rushan Chen","doi":"10.1109/COMPEM.2018.8496530","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496530","url":null,"abstract":"In order to extract the target's geometric electromagnetic characteristics effectively from the radar echo, this paper proposes a fast feature parameter extraction method of attributed scattering center model. We use the orthogonal matching pursuit (OMP) algorithm to estimate the attributed scattering center model. In the process of OMP algorithm, the RELAX algorithm is used to correct the extracted signal components. Compared with the traditional super-resolution algorithm based on point-scattering model, this algorithm can effectively solve the problem of discontinuity of components. And it is more accurate to describe the geometric features and position of the target.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115195532","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496736
Jing Cai, Y. Zhou
We propose a compact band-pass filter based on spoof localized surface plasmons (LSPs), which consists of four rectangular metal rings with corrugated grooves. It has been shown that the couplings between the resonators produce the flat-top transmission response and sharper out-of-band rejection. The simulation results validate the functionalities. It is believed that the proposed filter could be applied in the high-performance circuit design with compact size.
{"title":"A Compact Surface Plasmonic Band-Pass Filter with Sharp Out-of-Band Rejection","authors":"Jing Cai, Y. Zhou","doi":"10.1109/COMPEM.2018.8496736","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496736","url":null,"abstract":"We propose a compact band-pass filter based on spoof localized surface plasmons (LSPs), which consists of four rectangular metal rings with corrugated grooves. It has been shown that the couplings between the resonators produce the flat-top transmission response and sharper out-of-band rejection. The simulation results validate the functionalities. It is believed that the proposed filter could be applied in the high-performance circuit design with compact size.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123519641","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496561
Jiong Xu, Dawei Song, D. Ding, S. Tao, Rushan Chcn
The range resolution of the traditional single radar imaging system is limited by the bandwidth of the transmitted signal, while the cross resolution is limited by its observation angle range. In this paper, a high resolution 2d-imaging method using data fusion technique is proposed. First, we introduce the theoretical basis of multi-radar data fusion imaging based on the 2d-radar echo sparse representation model. Then, sparse parameters of multi-radar echo are obtained by ExCoV algorithm. Finally, we get lost echo data by interpolation and extrapolation and realize the fusion process. The simulation results show that the image quality is improved after radar data fusion, which is better than that of the single radar echo, verifying the effectiveness of our method.
{"title":"High Resolution 2d-Imaging Based on Data Fusion Technique","authors":"Jiong Xu, Dawei Song, D. Ding, S. Tao, Rushan Chcn","doi":"10.1109/COMPEM.2018.8496561","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496561","url":null,"abstract":"The range resolution of the traditional single radar imaging system is limited by the bandwidth of the transmitted signal, while the cross resolution is limited by its observation angle range. In this paper, a high resolution 2d-imaging method using data fusion technique is proposed. First, we introduce the theoretical basis of multi-radar data fusion imaging based on the 2d-radar echo sparse representation model. Then, sparse parameters of multi-radar echo are obtained by ExCoV algorithm. Finally, we get lost echo data by interpolation and extrapolation and realize the fusion process. The simulation results show that the image quality is improved after radar data fusion, which is better than that of the single radar echo, verifying the effectiveness of our method.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129248570","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496532
F. Xu, Shilei Fu
This paper investigates the potential of using deep neural network (DNN) to model electromagnetic forward problems. As a preliminary attempt, we use a deep convolutional neural network (CNN) to fit the scattered field of an inhomogeneous circular region as calculated by a 2D Finite Element-Boundary Integral (FE-BI) model. This approach provides a new tool to fast map input to output of a specific EM problem, which builds basis for further study on solving inverse problem with DNN.
{"title":"Modeling EM Problem with Deep Neural Networks","authors":"F. Xu, Shilei Fu","doi":"10.1109/COMPEM.2018.8496532","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496532","url":null,"abstract":"This paper investigates the potential of using deep neural network (DNN) to model electromagnetic forward problems. As a preliminary attempt, we use a deep convolutional neural network (CNN) to fit the scattered field of an inhomogeneous circular region as calculated by a 2D Finite Element-Boundary Integral (FE-BI) model. This approach provides a new tool to fast map input to output of a specific EM problem, which builds basis for further study on solving inverse problem with DNN.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128254535","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496484
Jianghong Qin, X. Kong, Shaobin Liu
A quasi-cross-shaped coupling slot antenna with a Wilkinson power divider network is proposed to realize the wideband polarization reconfigurable between linear polarization (CP), left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). The quasi-cross-shaped coupling slot generates two orthogonal linear polarization with high isolation. Four pairs of PIN diodes are used in four branches of the Wilkinson power divider network to alter the current flow path so as to generate a phase difference of 0° or $pm 90^{text{o}}$ and achieve the polarization reconfiguration. The results show that the proposed antenna has a 10-dB impedance bandwidth of 2.80-3.54GHz (0.74GHz, 23.3%) for LP and 2.82-3.49GHz (0.67GHz, 21.2%) for CP. The 3-dB axial ratio (AR) bandwidth is 2.92-3.43GHz (0.51GHz, 16.1%) for LHCP and 2.88-3.43GHz (0.55GHz, 17.4%) for RHCP. In addition, the antenna achieves a high average realized a gain of 9.1dBi.
{"title":"A Wideband Polarization Reconfigurable Antenna Using Quasi-Cross-Shaped Coupling Slot","authors":"Jianghong Qin, X. Kong, Shaobin Liu","doi":"10.1109/COMPEM.2018.8496484","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496484","url":null,"abstract":"A quasi-cross-shaped coupling slot antenna with a Wilkinson power divider network is proposed to realize the wideband polarization reconfigurable between linear polarization (CP), left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). The quasi-cross-shaped coupling slot generates two orthogonal linear polarization with high isolation. Four pairs of PIN diodes are used in four branches of the Wilkinson power divider network to alter the current flow path so as to generate a phase difference of 0° or $pm 90^{text{o}}$ and achieve the polarization reconfiguration. The results show that the proposed antenna has a 10-dB impedance bandwidth of 2.80-3.54GHz (0.74GHz, 23.3%) for LP and 2.82-3.49GHz (0.67GHz, 21.2%) for CP. The 3-dB axial ratio (AR) bandwidth is 2.92-3.43GHz (0.51GHz, 16.1%) for LHCP and 2.88-3.43GHz (0.55GHz, 17.4%) for RHCP. In addition, the antenna achieves a high average realized a gain of 9.1dBi.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125994325","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496485
Ruitao Zhou, W. Che, Haidong Chen, W. Feng
A X-band short-pulse high power amplifier (HPA) with high output power and high gain was proposed and implemented in this work. The HPA was realized by cascading a driving amplifier, a high power GaN FET and pulse control circuit. Under the pulse condition of 1 kHz PRF and 1% duty cycle, a maximum pulsed peak power level of 63 W is observed at the frequency of 8.2 GHz. In the frequency band from 8 GHz to 9 GHz, the short-pulsed HP A delivers more than 50W of output power, and the PAE is higher than 24.9%. The gain varies between 41.08 $mathbf{dB}$ and 42.01 dB with less than $pm pmb{1} mathbf{dB}$ gain variation. For demonstration, one prototype was fabricated and measured, reasonable results are observed.
{"title":"A High Power X-Band GaN-Based Short-Pulse Power Amplifier","authors":"Ruitao Zhou, W. Che, Haidong Chen, W. Feng","doi":"10.1109/COMPEM.2018.8496485","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496485","url":null,"abstract":"A X-band short-pulse high power amplifier (HPA) with high output power and high gain was proposed and implemented in this work. The HPA was realized by cascading a driving amplifier, a high power GaN FET and pulse control circuit. Under the pulse condition of 1 kHz PRF and 1% duty cycle, a maximum pulsed peak power level of 63 W is observed at the frequency of 8.2 GHz. In the frequency band from 8 GHz to 9 GHz, the short-pulsed HP A delivers more than 50W of output power, and the PAE is higher than 24.9%. The gain varies between 41.08 $mathbf{dB}$ and 42.01 dB with less than $pm pmb{1} mathbf{dB}$ gain variation. For demonstration, one prototype was fabricated and measured, reasonable results are observed.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127122077","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496552
Zhiyu Xing, Peng Yang, Feng Yang, Chuang Yan, T. Dong
We propose a miniaturized dielectric nanoantenna based on the CMOS compatible silicon-on-insulator (SOI) technology and synthesize a two-dimensional nanophotonic array using PSO algorithm. The size of the dielectric grating element antenna working at an infrared wavelength of 1550 nm is ${2.73} {mu} text{m} {times 0.93mu} text{m}({1.76lambdatimes 0.6lambda})$, which is the smallest size to date. The two-dimensional nanophotonic array is demonstrated with an aperture size of ${74.4mu} text{m}{times 74.4mu} text{m}{(48lambdatimes 48lambda)}$, achieving a sidelobe level of −15 dB. The most highlight is that it can avoid the appearance of grating lobes with a minimum element spacing limit of ${1.8lambda}$,
{"title":"Design of a Miniaturized Dielectric Nanoantenna and Synthesis of a Two-Dimensional Nanophotonic Array Based on Particle Swarm Optimization","authors":"Zhiyu Xing, Peng Yang, Feng Yang, Chuang Yan, T. Dong","doi":"10.1109/COMPEM.2018.8496552","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496552","url":null,"abstract":"We propose a miniaturized dielectric nanoantenna based on the CMOS compatible silicon-on-insulator (SOI) technology and synthesize a two-dimensional nanophotonic array using PSO algorithm. The size of the dielectric grating element antenna working at an infrared wavelength of 1550 nm is ${2.73} {mu} text{m} {times 0.93mu} text{m}({1.76lambdatimes 0.6lambda})$, which is the smallest size to date. The two-dimensional nanophotonic array is demonstrated with an aperture size of ${74.4mu} text{m}{times 74.4mu} text{m}{(48lambdatimes 48lambda)}$, achieving a sidelobe level of −15 dB. The most highlight is that it can avoid the appearance of grating lobes with a minimum element spacing limit of ${1.8lambda}$,","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127594406","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496517
Mingjie Pang, Chunbei Luo, Xiaowei Mei, Hai Lin
An efficient shadowing detection method based on octree and an improved specular model for indoor propagation using point cloud data is presented. By partitioning the overall space containing all points into the leaf nodes, an octree can shrink the traverse range dramatically. The theoretical value of the projected Fresnel area is applied to promote the specular model. Numerical results show that the octree has an excellent performance with a high accelerate rate. And The comparisons with ray tracing (RT) and the original method demonstrate that the improved specular model can indeed provide more precise results for indoor propagation. Combined with these two methods, a good simulation result can still be obtained even in a realistic complex indoor environment.
{"title":"Acceleration of Shadowing Detection with Octree and Improved Specular Model for Indoor Propagation Using Point Cloud Data","authors":"Mingjie Pang, Chunbei Luo, Xiaowei Mei, Hai Lin","doi":"10.1109/COMPEM.2018.8496517","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496517","url":null,"abstract":"An efficient shadowing detection method based on octree and an improved specular model for indoor propagation using point cloud data is presented. By partitioning the overall space containing all points into the leaf nodes, an octree can shrink the traverse range dramatically. The theoretical value of the projected Fresnel area is applied to promote the specular model. Numerical results show that the octree has an excellent performance with a high accelerate rate. And The comparisons with ray tracing (RT) and the original method demonstrate that the improved specular model can indeed provide more precise results for indoor propagation. Combined with these two methods, a good simulation result can still be obtained even in a realistic complex indoor environment.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"232 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113959073","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}
Pub Date : 2018-03-01DOI: 10.1109/COMPEM.2018.8496576
Xingying Huo, Junhong Wang, Zheng Li, Yuanjian Li, Meie Chen, Zhan Zhang, Xiaoyu Han
The attenuation properties of homogeneous rectangular dielectric waveguide are studied for the design of low attenuation transmission line in millimeter waveband. The properties of transmission loss for different cross sections of waveguide are analyzed in terms of guided wave and surface wave. The field distributions along the transverse directions are also calculated and compared for the cases of different parameters. The results show that if the cross section of the waveguide is properly designed, the rectangular dielectric waveguide can realize a relatively low transmission attenuation, which could be used in the application of next generation (5G) of wireless communication systems.
{"title":"Propagation Characteristics of Rectangular Dielectric Waveguide at Millimeter Waveband","authors":"Xingying Huo, Junhong Wang, Zheng Li, Yuanjian Li, Meie Chen, Zhan Zhang, Xiaoyu Han","doi":"10.1109/COMPEM.2018.8496576","DOIUrl":"https://doi.org/10.1109/COMPEM.2018.8496576","url":null,"abstract":"The attenuation properties of homogeneous rectangular dielectric waveguide are studied for the design of low attenuation transmission line in millimeter waveband. The properties of transmission loss for different cross sections of waveguide are analyzed in terms of guided wave and surface wave. The field distributions along the transverse directions are also calculated and compared for the cases of different parameters. The results show that if the cross section of the waveguide is properly designed, the rectangular dielectric waveguide can realize a relatively low transmission attenuation, which could be used in the application of next generation (5G) of wireless communication systems.","PeriodicalId":221352,"journal":{"name":"2018 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114572481","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}
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