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

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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
A new stacked microstrip antenna with large bandwidth and high gain 一种新型大带宽高增益叠层微带天线
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385192
H. Legay, L. Shafai
{"title":"A new stacked microstrip antenna with large bandwidth and high gain","authors":"H. Legay, L. Shafai","doi":"10.1109/APS.1993.385192","DOIUrl":"https://doi.org/10.1109/APS.1993.385192","url":null,"abstract":"A novel radiating element is presented which can provide simultaneously a large bandwidth and high gain. It consists of four identical patches uniformly displayed within a rectangular aperture (2*2), and fed electromagnetically by a driven patch etched on a lower substrate. It is shown that a good coupling with the parasitic patches is obtained, causing a large bandwidth, and that the resonance modes of each patch are excited in phase, giving a high gain. Its structural simplicity and superior performance make this element an attractive candidate for large phase arrays.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"156 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":"123532419","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: 69
Spectral domain analysis of square spiral microstrip antennas 方形螺旋微带天线的谱域分析
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385471
D. Shively
{"title":"Spectral domain analysis of square spiral microstrip antennas","authors":"D. Shively","doi":"10.1109/APS.1993.385471","DOIUrl":"https://doi.org/10.1109/APS.1993.385471","url":null,"abstract":"A square spiral placed on a dielectric slab which is backed by a ground plane is analyzed. The spectral domain Green's functions for a current element on a grounded dielectric slab are used to develop an integral equation which is solved by the method of moments. In this formulation, the effects of the dielectric material are rigorously modeled. The current density on one arm of the square microstrip spiral at 6.0 GHz is shown as a function of subdomain number and compares favorably to the results found in H. Nakano et al. (1986) for the Archimedean spiral. The gain, axial ratio, and input impedance of the square microstrip spiral are shown as functions of frequency and also compare favorably to the results for the Archimedean spiral.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"44 3 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":"123657539","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: 7
Numerical analysis of circular patch microstrip antenna with a dielectric element 带介电元件的圆形贴片微带天线的数值分析
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385469
Y. Yamaguchi, S. Egashira, A. Sakitani, E. Nishiyama
{"title":"Numerical analysis of circular patch microstrip antenna with a dielectric element","authors":"Y. Yamaguchi, S. Egashira, A. Sakitani, E. Nishiyama","doi":"10.1109/APS.1993.385469","DOIUrl":"https://doi.org/10.1109/APS.1993.385469","url":null,"abstract":"A numerical analysis of the gain characteristics and radiation patterns of a circular patch microstrip antenna with a dielectric element is presented. Numerical results are found to be in a good agreement with experimental data. It is confirmed that Hankel domain analysis is an effective method.<<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":"121396004","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
Design of aperture distributions for difference pattern from Taylor distributions 与Taylor分布不同的孔径分布设计
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385500
G. Yanchang, M. Meng, S. Xianrong, F. Nenghang
{"title":"Design of aperture distributions for difference pattern from Taylor distributions","authors":"G. Yanchang, M. Meng, S. Xianrong, F. Nenghang","doi":"10.1109/APS.1993.385500","DOIUrl":"https://doi.org/10.1109/APS.1993.385500","url":null,"abstract":"A novel design method is proposed with which difference patterns and their aperture distributions can be deduced from Taylor distributions. The peak sidelobe level in the difference pattern can be easily controlled. A formula for evaluating the sidelobe level of the difference pattern is given in which two parameters, the number of elements and the sidelobe level of the Taylor distribution, are included. The sidelobe level for the Taylor distribution is calculated to give the sidelobe level for the desired difference pattern.<<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":"124133632","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
Electromagnetic wave scattering by a two layer nonconfocal elliptical dielectric cylinder 两层非共焦椭圆介质圆柱体的电磁波散射
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385195
J. Ge, W. Lin
{"title":"Electromagnetic wave scattering by a two layer nonconfocal elliptical dielectric cylinder","authors":"J. Ge, W. Lin","doi":"10.1109/APS.1993.385195","DOIUrl":"https://doi.org/10.1109/APS.1993.385195","url":null,"abstract":"The authors investigate a solution for the scattering of an obliquely incident wave by a two-layer nonconfocal dielectric elliptical cylinder. The scattering of the E and H wave incidence cases is considered. The scattering wave equations are given in terms of radial and angular Mathieu functions.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"60 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":"127774981","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 efficient rectangular hat feed for linear polarization and low sidelobes 一个有效的矩形帽馈给线极化和低副瓣
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385352
A. Moldsvor, M. Raberger, P. Kildal
{"title":"An efficient rectangular hat feed for linear polarization and low sidelobes","authors":"A. Moldsvor, M. Raberger, P. Kildal","doi":"10.1109/APS.1993.385352","DOIUrl":"https://doi.org/10.1109/APS.1993.385352","url":null,"abstract":"A cheap alternative to the swan-neck feed, which can obtain low sidelobes even without an absorbing cylinder is presented. This feed is called the rectangular hat feed. The ideas of soft and hard surfaces have been used to optimize the performance of this linearly polarized feed. It can give low sidelobes and has broader bandwidth than the circular hat feed.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"44 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":"128009046","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: 10
Analysis of double- or quadruple-ridged waveguides by a magnetic surface integral equation approach 用磁面积分方程法分析双脊或四脊波导
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385373
WaiChing Sun, C. Balanis
{"title":"Analysis of double- or quadruple-ridged waveguides by a magnetic surface integral equation approach","authors":"WaiChing Sun, C. Balanis","doi":"10.1109/APS.1993.385373","DOIUrl":"https://doi.org/10.1109/APS.1993.385373","url":null,"abstract":"The authors present a unified approach to the analysis of ridged waveguides by a magnetic field integral equation (MFIE) formulation. The MFIE approach allows an accurate and complete solution via a simple numerical implementation of pulse basis functions. The emphasis in the present work is on the design of ridged waveguides for applications in microwave components and systems, rather than on details of numerical algorithms. The proposed theory is verified by comparison with exact closed-form solutions and other published results.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"116 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":"128058576","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
Automatic diagnostic and localization of defective elements in phased array antennas 相控阵天线缺陷元件的自动诊断与定位
Proceedings of IEEE Antennas and Propagation Society International Symposium Pub Date : 1993-06-28 DOI: 10.1109/APS.1993.385366
F. Ghannouchi, A. Kouki, A. Khebir
{"title":"Automatic diagnostic and localization of defective elements in phased array antennas","authors":"F. Ghannouchi, A. Kouki, A. Khebir","doi":"10.1109/APS.1993.385366","DOIUrl":"https://doi.org/10.1109/APS.1993.385366","url":null,"abstract":"A novel method for the diagnosis and localization of defective elements of feed network branches in large phased array antennas has been proposed and experimentally validated. A passive microwave comparer circuit is introduced which can be permanently integrated, in large numbers, in the phased array and will then be able to perform the functions of fault diagnostic and defective element localization. To validate the feasibility of the proposed technique, the complex ratio of two independent signals exciting two loads with the aid of a comparer circuit was measured.<<ETX>>","PeriodicalId":138141,"journal":{"name":"Proceedings of IEEE Antennas and Propagation Society International Symposium","volume":"18 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":"128071716","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
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