发布求助
文献互助 智能选刊 最新文献

Proceedings of IEEE Antennas and Propagation Society International Symposium最新文献

筛选
英文 中文
Adaptive nulling in hybrid antennas 混合天线的自适应消零
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385442
R. Shore
{"title":"Adaptive nulling in hybrid antennas","authors":"R. Shore","doi":"10.1109/APS.1993.385442","DOIUrl":"https://doi.org/10.1109/APS.1993.385442","url":null,"abstract":"Adaptive nulling in an array-fed offset paraboloidal reflector is considered. A narrow band system is assumed. It is also assumed that the signals received from the array feed can be weighted in both amplitude and phase and then summed to form the array output. The particular adaptive nulling algorithm used here is the generalized sidelobe canceller. H-plane design, adapted, and quiescent patterns are presented.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122317680","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
Radar signature validation by comparison to measured data 通过与实测数据的对比验证雷达特征
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385457
B.B. Halama, D.J. Andersh, A. Terzuoli
{"title":"Radar signature validation by comparison to measured data","authors":"B.B. Halama, D.J. Andersh, A. Terzuoli","doi":"10.1109/APS.1993.385457","DOIUrl":"https://doi.org/10.1109/APS.1993.385457","url":null,"abstract":"Monostatic radar signature measurement data are compared to CADDSCAT synthetic predictions for a standard set of primitive and complex targets. Prediction accuracy is compared for temporal, spatial, and spectral signature accuracy. The limitations of the CADDSCAT asymptotic predictions are assessed. CADDSCAT's implementation of the PO (physical optics), ILDC (incremental length diffraction coefficient), and SBR (shooting and bouncing rays) prediction methods is shown to provide excellent first-order radar signature predictions for complex, electrically large targets. The target measurements used have highlighted the limitation of PO-only predictions. The extension of the PO predictions to specular predictions of dielectric-coated targets was validated.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122450392","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 novel Luneburg lens feed for multiple beam antennas 用于多波束天线的新型吕尼堡透镜馈源
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385510
M.J. Goonan, W. Davies
{"title":"A novel Luneburg lens feed for multiple beam antennas","authors":"M.J. Goonan, W. Davies","doi":"10.1109/APS.1993.385510","DOIUrl":"https://doi.org/10.1109/APS.1993.385510","url":null,"abstract":"A novel implementation of a Luneburg lens has been developed to feed a circular array which can potentially radiate 36 simultaneous beams of 10/spl deg/ beamwidth. The Luneburg lens provides full 360/spl deg/ coverage and perfect focus. The motivation for this work comes from a requirement of Telecom Australia to investigate multiple beam antennas with 360/spl deg/ azimuth coverage as potential base station antennas in a cellular mobile telephone system in the frequency band of 825-896 MHz.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122703117","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
Electromagnetic analysis of horn with ortho-mode transducer 用正交模变换器对喇叭进行电磁分析
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385315
G. Cazzatello, G. Figlia, C. Klooster, D. Savini
{"title":"Electromagnetic analysis of horn with ortho-mode transducer","authors":"G. Cazzatello, G. Figlia, C. Klooster, D. Savini","doi":"10.1109/APS.1993.385315","DOIUrl":"https://doi.org/10.1109/APS.1993.385315","url":null,"abstract":"A new electromagnetic modeling activity has been carried out resulting in a significant improvement in the design and optimization capability of a feed system consisting of horn connected to an ortho-mode-transducer (OMT). The tools for the analysis of the horn, the OMT, and their combination, resulting in an integral analysis of the feed system, are described. The adopted approach is suitable for the extension of the analysis to waveguide structures, like matching networks, typical of a feed system. Some of the analytical results are supported by experimental results. The recent development of two methods for analysis of the OMT is emphasized.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"340 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114051802","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
Computation of scattering field for impedance coated bodies 阻抗包覆体散射场的计算
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385390
M. Guo-zhong
{"title":"Computation of scattering field for impedance coated bodies","authors":"M. Guo-zhong","doi":"10.1109/APS.1993.385390","DOIUrl":"https://doi.org/10.1109/APS.1993.385390","url":null,"abstract":"In order to obtain the solutions of the scattering field for large and complex bodies, a formula is derived from the Stratton-Chu integral equation under conditions of high-frequency, far-field, and the physical optics approximation. When calculating the surface integral, the impedance surfaces are divided into a large number of surface elements. These small grids are approximated by planar elements. the scattering field of the planar elements is expressed as an algebraic sum, so that the time-consuming integral operation can be avoided. The advantages of this method are simplicity and high speed. Numerical results on a coated plate and sphere show the validity of the method.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114441371","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
Numerical investigation of end- and centre-loaded slots 端部和中心载荷槽的数值研究
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385172
H. Moheb, L. Shafai, J. Shaker
{"title":"Numerical investigation of end- and centre-loaded slots","authors":"H. Moheb, L. Shafai, J. Shaker","doi":"10.1109/APS.1993.385172","DOIUrl":"https://doi.org/10.1109/APS.1993.385172","url":null,"abstract":"The equivalence principle and the generalized network formulation are used to model the tangential electric field of arbitrary apertures backed by a rectangular waveguide or cavity, in terms of equivalent magnetic currents. The result is an integral equation for the unknown aperture current. This integral equation is then reduced to a matrix equation using the method of moments. Specifically, the numerical technique is applied to end- and center-loaded slot antenna configurations backed by a rectangular waveguide.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"11 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116821147","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
Analysis of nonrectangular cavity-backed patch antennas using edge-based hybrid finite element method with BiCG-FFT solver 基于BiCG-FFT的边缘混合有限元分析非矩形腔背贴片天线
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385189
J. Gong, J. Volakis
{"title":"Analysis of nonrectangular cavity-backed patch antennas using edge-based hybrid finite element method with BiCG-FFT solver","authors":"J. Gong, J. Volakis","doi":"10.1109/APS.1993.385189","DOIUrl":"https://doi.org/10.1109/APS.1993.385189","url":null,"abstract":"To enable the use of the FFT (fast Fourier transform) in connection with the tetrahedral edge-based finite element-boundary integral formulation the authors propose a new approach for combining finite element and boundary integral matrices. This approach makes use of the space transformation concept to map the irregular gridding onto a fictitious regular one. Since the transformation matrix is highly sparse and may be obtained in the preprocessing phase, no additional memory is required aside from that needed for the implementation of the FFT.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129771648","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 adaptative array processor using the analog L.M.S. algorithm: An efficient solution for a N.A.V.S.T.A.R./G.P.S. application 一种采用模拟L.M.S.算法的自适应阵列处理器:一种有效的N.A.V.S.T.A.R./ gps解决方案应用程序
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385256
J. Milin, C. Terret, J.F. Diouris, J. Saillard
{"title":"An adaptative array processor using the analog L.M.S. algorithm: An efficient solution for a N.A.V.S.T.A.R./G.P.S. application","authors":"J. Milin, C. Terret, J.F. Diouris, J. Saillard","doi":"10.1109/APS.1993.385256","DOIUrl":"https://doi.org/10.1109/APS.1993.385256","url":null,"abstract":"A study has been performed to demonstrate the efficiency of adaptive signal processing for NAVSTAR/GPS (Global Positioning System) signal reception in a jamming ECM (electronic countermeasures) environment. The role of an adaptive antenna for such a system is to increase the signal to noise plus interference ratio (SNIR) to a power sufficient for most commercially available GPS receptors. The GPS signal reception power is about -160 dBm at the antennas. The analog LMS (least mean square) algorithm has been chosen for its highspeed/simplicity and lowcost trade-off. Test show good results: 64 dB SNIR enhancement in less than 300 /spl mu/s. Practical implementation of the LMS algorithm leads to experimental results that agree with the numerical simulation predictions.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128286498","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
RF performance of wire mesh used in deployable spacecraft antennas 可展开航天器天线用金属网的射频性能
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385514
G. Turner, W.F. Croswell
{"title":"RF performance of wire mesh used in deployable spacecraft antennas","authors":"G. Turner, W.F. Croswell","doi":"10.1109/APS.1993.385514","DOIUrl":"https://doi.org/10.1109/APS.1993.385514","url":null,"abstract":"Summary form only given. The use of graphite structure along with gold-plated molybdenum wire mesh surfaces enables the construction of reliable precision spacecraft antennas that can be stowed in a small volume for launch and then deployed on orbit. The basic shape and stability of the deployed antenna are maintained by the graphite ribs and backup structure while the mesh surface provides a high degree of reflectivity in order to prevent excessive RF system losses due to leakage through the reflector surface. For multichannel communications applications, the generation of passive inter-modulation (PIM) components from the nonlinear mixing of transmitted signals can result in interfering signals in band at the spacecraft receiver frequencies. For such applications the additional requirement is imparted that no significant PIM is generated by the reflector surface including the mesh. Practical precision measurement techniques and antenna storage methods are key for the maintenance and evaluation of mesh surface deployable antennas prior to launch to insure proper performance on orbit.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128351953","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
Spatial interpolation of the moment matrix in electromagnetic scattering and radiation problems 电磁散射和辐射问题中矩矩阵的空间插值
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385213
T.W. Nuteson, K. Naishadham, R. Mittra
{"title":"Spatial interpolation of the moment matrix in electromagnetic scattering and radiation problems","authors":"T.W. Nuteson, K. Naishadham, R. Mittra","doi":"10.1109/APS.1993.385213","DOIUrl":"https://doi.org/10.1109/APS.1993.385213","url":null,"abstract":"In the analysis of antennas and scatterers of arbitrary shape by the method of moments (MoM), it is desirable to fill the matrix efficiently so that larger size problems can be solved. The authors describe an efficient MoM technique in which the matrix is filled by spatial interpolation of the matrix elements. Redundant calculations in the moment matrix are eliminated by utilizing various symmetries. The method is illustrated by application to planar problems including scattering from a square plate and radiation from a microstrip patch antenna. Computed results compare very well with those in the published literature. Using interpolation to fill the moment matrix has proven to be very efficient and produces negligible error in the computed current distribution.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123996295","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