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
Simulation of EM emissions from printed circuit board traces 印刷电路板迹线电磁辐射模拟
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861765
A. Sebak
{"title":"Simulation of EM emissions from printed circuit board traces","authors":"A. Sebak","doi":"10.1109/ANTEM.1998.7861765","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861765","url":null,"abstract":"Recently electromagnetic interference (EMI) and electromagnetic emissions (EME) become a serious problem because of the high mounting density on printed circuit boards (PCBs) and the fast speed of ICs. Digital pagers, wireless input devices, hand-held radios, personal computers, and cellular phones and other devices have all become more prevalent in civilian and military environments. In today's market place, controlling emissions from these and other products has become a necessity to satisfy many standards and regulations. In addition, many of these products should fit into a larger community of electronic systems without interference among devices. EMI and EME problems can be taken into account at the design stage to reduce the overall cost of correcting such problems late in the development process.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"33 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":"122720355","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
Space laser communication-An overview 空间激光通信综述
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861669
D. Begley
{"title":"Space laser communication-An overview","authors":"D. Begley","doi":"10.1109/ANTEM.1998.7861669","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861669","url":null,"abstract":"Satellite communications is an important segment of near term and future hybrid network architectures of orbital and terrestrial systems, allowing rapid access to multimedia information services. Recent technological advances in the supporting technologies have now enabled laser communication subsystems to support the anticipated high-performance characteristics needed by future networks. In this paper we describe the advantages of space borne optical communications for intersatellite links and the application to the emerging information infrastructures. We also present an overview of worldwide efforts to demonstrate the capability of this emerging technology.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"11 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":"130262531","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
Dual-frequency antenna for PCS handsets 用于pc手机的双频天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861757
M. Rahman, M. Stuchly, M. Okoniewski
{"title":"Dual-frequency antenna for PCS handsets","authors":"M. Rahman, M. Stuchly, M. Okoniewski","doi":"10.1109/ANTEM.1998.7861757","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861757","url":null,"abstract":"A dual-frequency monopole antenna for mobile handheld units has been designed that can operate in both frequency bands allocated for PCS (personal communication service) system. The bandwidth obtained for the antenna is 19.3% and 11.2% for the lower and higher PCS band, respectively with VSWR≤2. The Finite-difference time-domain (FDTD) method is used to obtain the optimum dimensions of the antenna and its different characteristics with and without the presence of the user's head. The resultant deposition of the microwave power in the user's head, called the specific absorption rate (SAR) has also been calculated.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"37 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":"128009971","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
Low loss sub-array 低损耗子阵列
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861769
L. Shafai, N. Jacobs
{"title":"Low loss sub-array","authors":"L. Shafai, N. Jacobs","doi":"10.1109/ANTEM.1998.7861769","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861769","url":null,"abstract":"Microstrip antenna arrays, in space applications, are relatively new, and have not reached to the level of utilization as the reflector antennas and slotted waveguide arrays. Two areas they need improvement, the design accuracy and substrate quality. The latter results in heavy weights with solid dielectric substrates, necessitating thin substrates, and high resistive losses, demanding thicker substrates for the feed network. These are two conflicting conditions and require compromise, or a new design for the feed network.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"46 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":"124955508","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
An optimized complex-image prediction model for a closed-form solution of vertical antennas above a dielectric half-space 介质半空间上垂直天线封闭解的优化复像预测模型
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861772
R. Shubair
{"title":"An optimized complex-image prediction model for a closed-form solution of vertical antennas above a dielectric half-space","authors":"R. Shubair","doi":"10.1109/ANTEM.1998.7861772","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861772","url":null,"abstract":"The electromagnetic modeling of vertical antennas above a dielectric half-space involves the computation of Sommerfeld-type integrals each of which represent he inverse transformation of a slowly-convergent spectral-domain Green's function. It is well known that the numerical evaluation of these integrals is computationally time-expensive. Alternatively, the complex-image technique, proposed in [1], is used in this paper to derive closed-form expressions of the required spatial Green's functions associated with vertical antennas above a dielectric half-space. The accuracy of the complex-image technique is further improved by modifying the amplitudes and locations of the images so that an optimized complex-image prediction model is produced.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"32 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":"124959586","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
Feed development for advanced Satcom RX-antenna application 先进卫星通信rx天线应用的馈电开发
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861790
J. Uher, M. Gimersky, J. Bornemann
{"title":"Feed development for advanced Satcom RX-antenna application","authors":"J. Uher, M. Gimersky, J. Bornemann","doi":"10.1109/ANTEM.1998.7861790","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861790","url":null,"abstract":"The paper presents the results of the feed development for the Advanced Satcom Rx-antenna. Two design variants have been developed and described in this paper. The first feed design was used to illuminate a dielectric lens antenna, whereas the second is compatible with a multiple reflector antenna system. Both antenna concepts require the use of a feed cluster. A 19-element feed cluster was designed, built and tested for the dielectric lens. A single feed chain was developed for the reflector system. The feed design issues, as well as the measured results are presented in the paper. Excellent feed performance is demonstrated.","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":"128681362","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
Simulation and experimental evaluation of the low loss grooved lines 低损耗沟槽线的仿真与实验评价
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861711
Nisha Gupta, N. Jacob, W. Chamma, L. Shafai, S. Raut, A. Asi
{"title":"Simulation and experimental evaluation of the low loss grooved lines","authors":"Nisha Gupta, N. Jacob, W. Chamma, L. Shafai, S. Raut, A. Asi","doi":"10.1109/ANTEM.1998.7861711","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861711","url":null,"abstract":"This paper presents a new Grooved Microstrip Line structure(GMLS) for low loss configuration. The dispersion characteristics of this line is determined using the well known numerical technique, the Method of lines(MOL). Finally the conductor and dielectric losses are calculated and compared with the experimental result in the frequency range of 1–16 GHz.","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":"127627629","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
An equivalent surface representation for wave scattering by inhomogeneous objects 非均匀物体波散射的等效表面表示
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861778
D. Swatek, I. Ciric
{"title":"An equivalent surface representation for wave scattering by inhomogeneous objects","authors":"D. Swatek, I. Ciric","doi":"10.1109/ANTEM.1998.7861778","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861778","url":null,"abstract":"The inhomogeneous structure of an object is accounted for by a pair of surface integral operators that provide the components of the electric and magnetic fields tangent to the object's outer surface only in terms of a single unknown density of electric current distributed on that same outer surface. This equivalent surface representation is invariant under rotation and translation, and independent of external material and illumination. The computational advantage of such a transformation is shown by a numerical example.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"52 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":"122305774","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
Analysis and measurements of reflection phase shifters at 1.5 and 18.5 GHz 1.5 GHz和18.5 GHz反射移相器的分析与测量
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861730
P. Lahaie, M. Lecours
{"title":"Analysis and measurements of reflection phase shifters at 1.5 and 18.5 GHz","authors":"P. Lahaie, M. Lecours","doi":"10.1109/ANTEM.1998.7861730","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861730","url":null,"abstract":"This paper is concerned with the use of phase shifters in steerable antennas when there is a need to change the orientation of the radiation pattern. There are a number of types of phase shifters but, for phase shifts above 90 degrees, transmission or reflection type phase shifters offer prefered solutions. The difference in performance between these two types of phase shifters does not appear to be very significant, but transmission type phase shifters may have an advantage in offering phase shifts less affected by the load characteristics, while the reflection type phase shifter is controled by two pin diodes only (instead of three) which may lead to a somewhat less expensive design. In this paper we focus mainly on the behaviour of different reflection type phase shifters design and we present some experimental results for an phase shifters in the 1.5 and 18.5 GHz bands.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"39 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":"124367838","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
A MM-wave circularly polarized substrate lens antenna for wireless communications 一种用于无线通信的毫米波圆偏振基片透镜天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861795
Xidong Wu, G. Eleftheriades, E. van Deventer
{"title":"A MM-wave circularly polarized substrate lens antenna for wireless communications","authors":"Xidong Wu, G. Eleftheriades, E. van Deventer","doi":"10.1109/ANTEM.1998.7861795","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861795","url":null,"abstract":"As the need for wireless systems with wider bandwidths is growing, the microwave frequency band either becomes too congested or simply cannot support the ever increasing data-rate requirements. Therefore, the operating frequency of wireless communications systems is gradually shifting towards millimeter-wave frequencies [1], resulting in an increased interest in recent years in developing millimeter-wave (mm-wave) integrated circuit (IC) antennas for indoor and outdoor wireless communications.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"63 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":"128729811","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: 6
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