发布求助
文献互助 智能选刊 最新文献

2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition最新文献

筛选
英文 中文
A novel rectifier for wireless power transmission with a wide input power range 一种新型宽输入功率范围无线电力传输整流器
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888778
Hucheng Sun, Yong-xin Guo, Z. Zhong
{"title":"A novel rectifier for wireless power transmission with a wide input power range","authors":"Hucheng Sun, Yong-xin Guo, Z. Zhong","doi":"10.1109/IWEM.2013.6888778","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888778","url":null,"abstract":"This paper presents a novel rectifier with a considerably expanded operating input power range for wireless power transmission (WPT) applications. By utilizing a depletion-mode metal-oxide-semiconductor field-effect transistor (MOSFET), the diode's breakdown voltage can be enlarged while preserving the same threshold voltage. Therefore, compared with traditional rectifiers, this proposed rectifier can perform a high RF-to-dc power conversion efficiency (PCE) in a much wider input power range. The rectifier's performance has been proved by measurement results, which show that a PCE above 50% can be achieved over the input power range from -13.5 to 16.7 dBm.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123726398","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
Simulating composite metallic and dielectric objects by an improved multilevel Green's function interpolation method 用改进的多层格林函数插值法模拟复合金属介质物体
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888779
P. Zhao, C. Chan
{"title":"Simulating composite metallic and dielectric objects by an improved multilevel Green's function interpolation method","authors":"P. Zhao, C. Chan","doi":"10.1109/IWEM.2013.6888779","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888779","url":null,"abstract":"As the kernel of multilevel Green's function interpolation method (MLGFIM), radial basis function interpolation always has large interpolation errors near boundary because of an ill-conditioning of spectrally accurate methods on uniformly distributed points. To remedy this problem, a new interpolation grid pattern with boundary clustered distribution is proposed to improve the Green's function interpolation. By applying this new grid, the efficiency of MLGFIM is greatly enhanced. Numerical experiments have been given to demonstrate the accuracy and efficiency of the proposed method.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116009186","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
Wide stopband band-notched UWB BPF and its application to determination of material dielectric constant 宽阻带陷波超宽带BPF及其在材料介电常数测定中的应用
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888783
Hui Wang, K. Tam, S. Ho, Wen Wu
{"title":"Wide stopband band-notched UWB BPF and its application to determination of material dielectric constant","authors":"Hui Wang, K. Tam, S. Ho, Wen Wu","doi":"10.1109/IWEM.2013.6888783","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888783","url":null,"abstract":"An ultra-wideband (UWB) bandpass filter (BPF) with notched band and wide stopband has been designed, fabricated, and discussed in this work. The proposed UWB BPF is constructed on the basis of microstrip/slotline transitions, which can be used as the feeding structure to provide strong coupling for wideband BPF. The fabricated BPF has good in-band performance with a notched band centered at 8.0 GHz with 8.5% 10-dB fractional bandwidth and the wide stopband with 20-dB attenuation extends to 40 GHz. In addition, a transmission zero, i.e., the notched band can be used for determination of dielectric properties. The effective permittivity of some common materials namely FR-4 or glasses are computed with better than 10% relative error.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121616458","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
Dual-polarized antenna element for LTE applications 用于LTE应用的双极化天线元件
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888800
Xia Gao, H. Lai, K. So, H. Wong
{"title":"Dual-polarized antenna element for LTE applications","authors":"Xia Gao, H. Lai, K. So, H. Wong","doi":"10.1109/IWEM.2013.6888800","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888800","url":null,"abstract":"A wideband and low profile dual-polarized antenna element for LTE base stations is presented in this paper. The antenna operates from 1.89GHz to 2.66GHz for S11<;-10dB and has gains of around 9dBi within its operating bandwidth at both input ports. This dual polarized antenna has a very high isolation of 40dB between the two input ports. Besides, the height of the proposed antenna is about 0.16λ0, which is very low-profile. It is suitable for constructing antenna array for LTE base stations.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130461701","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
A wideband dual-fed circularly polarized antenna 一种宽带双馈圆极化天线
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888785
Mingjian Li, K. Luk
{"title":"A wideband dual-fed circularly polarized antenna","authors":"Mingjian Li, K. Luk","doi":"10.1109/IWEM.2013.6888785","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888785","url":null,"abstract":"A wideband circularly polarized antenna based on dual-polarized magneto-electric dipole antenna is proposed. After connected to a broadband 90° phase shifter and a Wilkinson power divider, the proposed dual-polarized antenna achieves circularly polarized (CP) radiation. This CP antenna exhibits a wide impedance bandwidth of 89.7% from 1.23 - 3.23 GHz with SWR ≤ 2 which covers the whole 3-dB axial-ratio (AR) bandwidth of 82% from 1.28 - 3.05 GHz. In this operation frequency band, the proposed antenna has a broadside gain of larger than 5 dBi above 1.45 GHz. Considering the common overlapped bandwidth limited by the impedance, AR and gain, the proposed antenna exhibits an effective bandwidth of 71%.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134319631","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
A very compact UWB-MIMO antenna with band-notched characteristic 一种非常紧凑的UWB-MIMO天线，具有带缺口特性
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888788
Biao Wang, Haogang Wang, Huan Yu
{"title":"A very compact UWB-MIMO antenna with band-notched characteristic","authors":"Biao Wang, Haogang Wang, Huan Yu","doi":"10.1109/IWEM.2013.6888788","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888788","url":null,"abstract":"A very compact UWB-MIMO antenna with band-notched characteristic has been proposed. The antenna printed on a PCB board consists of two notched rectangular radiators with two feeding port. A truncated ground plane is modified on the reverse side of the board. The dimension of the antenna is only 30mm×30mm×1.6mm. The achieved impedance bandwidth for S11 = -10dB covers the range of 3.7-5GHz and 5.85-10.6 GHz. The isolation is less than -15 dB. The novel UWB-MIMO antenna has ultra wide impedance bandwidth, very compact size, stable gain and almost omni-directional radiation patterns in the three-dimensional space that is suitable for various portable UWB-MIMO devices.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129255787","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
Wideband unbalanced fed 180-degree phase shifter using phase inverter 采用反相器的宽带不平衡馈电180度移相器
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888775
K. Hagiwara, H. Arai
{"title":"Wideband unbalanced fed 180-degree phase shifter using phase inverter","authors":"K. Hagiwara, H. Arai","doi":"10.1109/IWEM.2013.6888775","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888775","url":null,"abstract":"In this paper, the design of unbalanced fed 180° phase shifter with a wideband performances is proposed. This phase shifter uses a single dielectric substrate, and consists of multi-section Wilkinson divider, reference line, and phase inverter containing balanced-unbalanced transition in the input and output port. The simulated and measured results show that this device provides 180° phase shift with low insertion loss in the frequency band from 1 to 10 GHz.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127597716","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
Printed U-slot patch antenna for 60GHz applications 印刷u槽贴片天线60GHz应用
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888796
Hang Liu, Yejun He, H. Wong
{"title":"Printed U-slot patch antenna for 60GHz applications","authors":"Hang Liu, Yejun He, H. Wong","doi":"10.1109/IWEM.2013.6888796","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888796","url":null,"abstract":"A high-gain and low-cost millimetre-wave patch antenna is presented. The designed antenna with a U-slot loaded on the patch is excited by a single microstrip line. The impedance bandwidth of the prototype is ~11.6% from 57GHz to 60GHz. The gain of 8.2dBi is achieved at 60GHz. This single antenna element yields advantages of high gain, good directional radiation pattern and low fabrication cost. It is suitable for unlicensed millimeterwave ISM-band applications.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"43 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120926432","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: 13
Design of cosecant squared beam collinear array using genetic algorithm 用遗传算法设计余割平方光束共线阵列
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888774
T. Uesaka, H. Arai
{"title":"Design of cosecant squared beam collinear array using genetic algorithm","authors":"T. Uesaka, H. Arai","doi":"10.1109/IWEM.2013.6888774","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888774","url":null,"abstract":"In this paper, design of a cosecant squared beam collinear dipole array using genetic algorithm (GA) is presented. Cosecant squared beam provide flat power density and it have been mainly used for a radar and base station. The array antenna design using GA is not to require the calculation of derivatives and easy to deal in various variables. In this presentation, the cosecant squared beam collinear dipole array is designed using GA by controlling only a phase and element spacing in order to eliminate the loss of attenuator to control the amplitude. As the result, the smooth cosecant squared beam is obtained from 10° to 42°.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128566396","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
Numerical calculation of extremely large reflector antenna using high-performance parallel MLFMA 基于高性能并行MLFMA的超大反射面天线的数值计算
2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI: 10.1109/IWEM.2013.6888766
Xu-Min Sun, Bin Li, Xiao-Min Pan, X. Sheng
{"title":"Numerical calculation of extremely large reflector antenna using high-performance parallel MLFMA","authors":"Xu-Min Sun, Bin Li, Xiao-Min Pan, X. Sheng","doi":"10.1109/IWEM.2013.6888766","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888766","url":null,"abstract":"The extremely large parabolic reflector of the 500-m aperture spherical telescope (FAST) is calculated. As the largest single dish in the world, the FAST reflector is a spherical cap with a radius of 300 m and an aperture diameter of 500 m. In order to accurately calculate the FAST antenna model, the parallel multilevel fast multipole algorithm (MLFMA) is used, in combination with the improved sparse approximate inverse (SAI) preconditioner algorithm. Fast far-field calculation method based on upward pass of the MLFMA is used to accelerate the code efficiency. Result shows the efficiency for antenna gain is improved several thousand times. To verify the calculation, simulations using commercial software ANSYS FEKO were carried out, and good agreement between calculation and simulation is obtained.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131254122","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信