发布求助
文献互助 智能选刊 最新文献

1998 Symposium on Antenna Technology and Applied Electromagnetics最新文献

筛选
英文 中文
Magnetic fields from electric power systems in living environment 生活环境中电力系统产生的磁场
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861729
T. Keikko, J. Isokorpi, L. Korpinen
{"title":"Magnetic fields from electric power systems in living environment","authors":"T. Keikko, J. Isokorpi, L. Korpinen","doi":"10.1109/ANTEM.1998.7861729","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861729","url":null,"abstract":"The aim of this study was to investigate the levels of extremely low frequency magnetic fields levels from previous studies to evaluate the magnetic fields from power systems in living environment Four different power system environments were studied: transmission and distribution lines, substations, distribution substations and indoor mounting in the buildings. Results were gathered together to find out the essential sources of magnetic fields in living environment. The magnetic fields from 400 kV and 110 kV transmission lines, substations and indoor distribution substations exceeded the immunity level, 3.8 μT, for electric appliances.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125767898","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
Radiation less feeder type excited wideband Tchebychev tapered slotline antenna 无辐射馈线型受激宽带切比切夫锥形槽线天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861782
S. Tardif, K. Hettak, G. Delisle
{"title":"Radiation less feeder type excited wideband Tchebychev tapered slotline antenna","authors":"S. Tardif, K. Hettak, G. Delisle","doi":"10.1109/ANTEM.1998.7861782","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861782","url":null,"abstract":"Efficiency, bandwidth, light weight and geometric simplicity are the most cruccial requirements for antennas designed for some specific applications like the emergence of new application areas in the fixed and mobile communications. One of the most desirable candidates catering for these demands is the tapered slot antenna (TSA), which belongs to a group of endfire traveling wave antennas. The most attractive of the TSAs in contrast to other kinds of planar antennas are that it can work over a large frequency bandwidth, low cost, easy fabrication, low profile and produce a symmetric endfire beam with appreciable gain and low sidelobes. In this paper, a new configuration of Tapered Slot Antenna (TSA) with an improved return loss and radiation pattern is presented. The new design has tapered section expressed by the Tchebychev function. In addition, a new technique, using CPW to slotline transition in order to couple the CPW to the slotline input of the Tchebychev antenna is introduced. This transition offered the advantage of an inline port geometry suitable for array applications.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129447917","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
Efficiency improvement of triplate array 三板阵列效率的提高
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861710
D. Gray, L. Shafai
{"title":"Efficiency improvement of triplate array","authors":"D. Gray, L. Shafai","doi":"10.1109/ANTEM.1998.7861710","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861710","url":null,"abstract":"Triplate line fed arrays have been researched extensively over the last 10 years for DBS television subscriber antenna in Japan and Europe. The chief advantage of this type of planar array is the reduction of radiation from the array's feedlines. One class of triplate fed array employs a thin metal sheet with apertures punched for radiation from patches on the triplate layer [1], Figure 1. This type of triplate array is considered as a candidate for LMCS subscriber antenna. The focus of this research is to identify different methods for increasing the aperture efficiency of this type of triplate fed array, in order to counter the losses that are expected to occur at EHF.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129897860","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
Terrestrial scanning antenna technologies for Ka-band broadband satellite communication systems ka波段宽带卫星通信系统的地面扫描天线技术
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861737
H. Malone, M. Bai, F. Blatter, L. Gonzalez, R. Vidano
{"title":"Terrestrial scanning antenna technologies for Ka-band broadband satellite communication systems","authors":"H. Malone, M. Bai, F. Blatter, L. Gonzalez, R. Vidano","doi":"10.1109/ANTEM.1998.7861737","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861737","url":null,"abstract":"Global Ka-band broadband communications systems may be comprised of low earth orbit (LEO) as well as geosynchronous earth orbit (GSO) components. These systems can be seamlessly integrated to provide high data rate service between point-to-point, point-to-multipoint, and point-to-broadcast users around the world.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131058848","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
Characteristics of grating assisted fibre-optic lattices and ring resonators 光栅辅助光纤晶格和环形谐振器的特性
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861663
Jamal N. Abdou, O. Schwelb
{"title":"Characteristics of grating assisted fibre-optic lattices and ring resonators","authors":"Jamal N. Abdou, O. Schwelb","doi":"10.1109/ANTEM.1998.7861663","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861663","url":null,"abstract":"The reflection, transfer and group delay characteristics of optical fibre lattices, fabricated from 2×2 couplers, waveguides and reflecting elements such as mirrors and gratings, are investigated through numerical experiments. Simulations on the distribution of resonances and the effect of coupling and loss in resonant optical circuits are also reported.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126698982","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
Noise characteristics of GaInP/GaAs HBT at 29 GHz 29 GHz时GaInP/GaAs HBT的噪声特性
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861733
B. Lemna, A. Freundorfer
{"title":"Noise characteristics of GaInP/GaAs HBT at 29 GHz","authors":"B. Lemna, A. Freundorfer","doi":"10.1109/ANTEM.1998.7861733","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861733","url":null,"abstract":"A characterization of bias and emitter periphery-to-area ratio (Pe/Ae) of GaInP/GaAs HBT at 29 GHz is presented. The measured data of fmax, ft, Fmin, associated gain (Ga) and noise measure (NM) for four transistors were obtained. It is shown that the larger periphery-to-area ratio of the emitter, Pe/Ae, the lower the Fmin with a minimum. The best transistor, an array of twenty 2×2 μm2, had Fmin=2.81 dB, Ga = 4.9dB and NM=1.35.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123335540","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
Vector wave functions in uniaxial chiro-omega medium and their applications to scattering problems 单轴奇罗-欧米伽介质中的矢量波函数及其在散射问题中的应用
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861684
D. Cheng, Y. Antar
{"title":"Vector wave functions in uniaxial chiro-omega medium and their applications to scattering problems","authors":"D. Cheng, Y. Antar","doi":"10.1109/ANTEM.1998.7861684","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861684","url":null,"abstract":"The uniaxial chiro-omega medium, which is a modification of the well-studied reciprocal chiral medium [1], can be created by embedding microscopic metal helices and Ω-shaped metal wires in the same isotropic host material in a certain specified manner but distributed in random locations [2]. From a phenomenological point of view, a uniaxial chiro-omega medium with the preferred axis of z direction can be characterized by a set of constitutive relations: D=ε· E+ξ·H and B=μ·H+ζ·E, where ε = εt Īt + εzezez' and μ=μtĪt+μzezez are the permittivity and permeability dyadics, respectively. ξ = i (μ0ε0)1/2 (−αĪt+βez × Īt) and ζ = −i (μ0ε0)1/2 (αĪt+βez × Īt) denote the uniaxial magnetoelectric pseudo-dyadics.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126046424","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
Frequency-property improvement of a planar waueguide array antenna for compact range application 面向小范围应用的平面波导阵列天线的频率特性改进
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861742
K. Miyata
{"title":"Frequency-property improvement of a planar waueguide array antenna for compact range application","authors":"K. Miyata","doi":"10.1109/ANTEM.1998.7861742","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861742","url":null,"abstract":"Attempts for constructing an inexpensive compact range environment have been made so far by the authors [1]-[2]. The environment consists of a 3 cubic meter anechoic chamber and a plane wave generating source antenna made of WRJ-10 waveguide arrays. The latter, however, had a narrow frequency range of operation very close to f=12 GHz because of the nature of the waveguide structure and the feed system. The source antenna the authors are considering here is the arrays of waveguides with slots on the E-plane wall of the waveguides. By combining 48 of these waveguides, the source antenna with its approximate aperture dimensions being 1200 mm × 1200 mm is constructed. This waveguide array antenna is to be fed by a corporate feed system so that an equi-phase /equi-amplitude feed at each waveguide end is realized over the X-band frequency range. Since the wave front of a waveguide slot array become tilted when excited by a wave different from the designed frequency, slight rotation of the source antenna system is being planned. In this paper, as a first step of fabricating the planar array, the basic properties of the element waveguide are investigated.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121709118","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
Interconnect modelling of coplanar HBT transistor arrays 共面HBT晶体管阵列互连建模
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861705
A. Freundorfer, Y. Jamani
{"title":"Interconnect modelling of coplanar HBT transistor arrays","authors":"A. Freundorfer, Y. Jamani","doi":"10.1109/ANTEM.1998.7861705","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861705","url":null,"abstract":"A method of modelling common-emitter and common-base transistor arrays using transmission line theory is presented. A comparison between measured results and simulation shows that modelling the interconnect between transistors in the array is good up to 40 GHz.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132606583","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
Practical methods for the reduction of radiation from printed circuit boards 减少印刷电路板辐射的实用方法
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861674
S. Bokhari
{"title":"Practical methods for the reduction of radiation from printed circuit boards","authors":"S. Bokhari","doi":"10.1109/ANTEM.1998.7861674","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861674","url":null,"abstract":"The paper examines common techniques for reducing radiation from high speed multi-layered printed circuit boards from a theoretical perspective. The focus is on boards using transmission lines of the microstrip or the stripline type. Numerical results giving the relative magnitude of the emission reduction feasible are provided.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134090486","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：604180095
Book学术官方微信