发布求助
文献互助 智能选刊 最新文献

Antennas and Propagation Society Symposium 1991 Digest最新文献

筛选
英文 中文
Performance of a 10 GHz circular patch antenna fed by an aperture coupled microstrip line 孔径耦合微带线馈电10ghz圆形贴片天线的性能
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175037
J. Navarro, K. Chang, J. Tolleson, S. Sanzgiri, R. Lee
{"title":"Performance of a 10 GHz circular patch antenna fed by an aperture coupled microstrip line","authors":"J. Navarro, K. Chang, J. Tolleson, S. Sanzgiri, R. Lee","doi":"10.1109/APS.1991.175037","DOIUrl":"https://doi.org/10.1109/APS.1991.175037","url":null,"abstract":"A circular patch antenna fed by an aperture coupled microstrip line has been demonstrated. The patch was enclosed by a cavity to reduce the surface wave interactions in an array environment and to improve heat dissipation when using active devices. A pedestal design was also implemented to help heat dissipation when using active microwave circuits. The antenna exhibited a 9.3% bandwidth from 9.55 to 10.48 GHz.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124789878","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
Analysis of a microstrip patch antenna using the method of moments 用矩量法分析微带贴片天线
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.174768
T. Sarkar, S. M. Rao
{"title":"Analysis of a microstrip patch antenna using the method of moments","authors":"T. Sarkar, S. M. Rao","doi":"10.1109/APS.1991.174768","DOIUrl":"https://doi.org/10.1109/APS.1991.174768","url":null,"abstract":"An analysis of a microstrip patch antenna on a finite dielectric substrate is presented. The antenna is excited by the feedline passing below the dielectric bed. For analysis purposes, the patch, the feedline, and the dielectric substrate are modeled by triangular patches. A set of coupled integral equations, in terms of equivalent currents, is obtained by using the equivalence principle and associated boundary conditions. The equations are then solved using the method of moments. The numerical results are compared with experimental measurements, exhibiting good agreement.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123382668","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
Near-field investigations to determine the lines of constant phased for an airborne position-finding antenna-system 确定机载定位天线系统恒相线的近场研究
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175078
E. Kemptner, V. Stein
{"title":"Near-field investigations to determine the lines of constant phased for an airborne position-finding antenna-system","authors":"E. Kemptner, V. Stein","doi":"10.1109/APS.1991.175078","DOIUrl":"https://doi.org/10.1109/APS.1991.175078","url":null,"abstract":"A method is presented which makes it possible to calculate the scattered field very close to the surface of a perfectly conducting body as well as the surface itself. The method is based on the representation of the scattered field by an integral over the surface current distribution. The integrand is treated by identical transformations in such a way that the singular terms can be integrated analytically, while the remaining nonsingular terms are integrated numerically. The surface current distribution is determined by the magnetic field integral equation. The theory is validated by experiments by means of the scattered field of a metallic cube with an edge length of a wavelength. The normal and tangential electric near-field of the cube is measured by small probes, and the results are compared with those of the theory. The theoretical results of the near-field distribution of a cube and an airplane are presented using lines of constant phase.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123730229","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
Measured mutual coupling between two-layer electromagnetically coupled patch antennas 测量了两层电磁耦合贴片天线之间的互耦性
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175103
R.Q. Lee, T. Talty, K. Lee
{"title":"Measured mutual coupling between two-layer electromagnetically coupled patch antennas","authors":"R.Q. Lee, T. Talty, K. Lee","doi":"10.1109/APS.1991.175103","DOIUrl":"https://doi.org/10.1109/APS.1991.175103","url":null,"abstract":"Measured mutual coupling results for two X-band rectangular EMCP (electromagnetically coupled patch) antennas are reported. Results for radiating edge (E-plane) coupling are shown for a single patch and for the cases when the EMCP is operating in the wideband region and the high gain region. Results for nonradiating edge (H-plane) coupling are shown. It is seen that high gain EMCP coupling via the radiating edges have the strongest coupling while the same antennas coupling via the nonradiating edges have the weakest coupling.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120955827","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
Moving targets SAR processing 运动目标SAR处理
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.174888
L. Eskenazi
{"title":"Moving targets SAR processing","authors":"L. Eskenazi","doi":"10.1109/APS.1991.174888","DOIUrl":"https://doi.org/10.1109/APS.1991.174888","url":null,"abstract":"The main results of SAR (synthetic aperture radar) processing are reviewed, and a method for imaging fixed and moving targets, called MTI (moving target indicator) SAR, at the same time is presented. The advantages and limitations of this method are explained. This is done in the framework of a side-looking airborne SAR, as opposed to spaceborne SAR.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116193915","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 compact shaped single-reflector offset antenna with low cross-polarization 一种形状紧凑的低交叉极化单反射偏置天线
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.174931
E. Lier, S. Skyttemyr
{"title":"A compact shaped single-reflector offset antenna with low cross-polarization","authors":"E. Lier, S. Skyttemyr","doi":"10.1109/APS.1991.174931","DOIUrl":"https://doi.org/10.1109/APS.1991.174931","url":null,"abstract":"A novel compact single-reflector offset antenna is presented. The antenna has been synthesized and analyzed by programs which result from modifications to corresponding programs for dual-reflector offset antennas. Computations have demonstrated that the novel antenna concept exhibits high antenna efficiency, low sidelobes, and low cross-polarization, similar to the pattern characteristics of dual-reflector offset antennas.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116297483","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
Parasite-free 3D finite element vector boundary-value solutions on C/sup 0/ elements C/sup 0/单元上无寄生虫三维有限元向量边值解
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175067
K. Paulsen, D. Lynch, X. Jia
{"title":"Parasite-free 3D finite element vector boundary-value solutions on C/sup 0/ elements","authors":"K. Paulsen, D. Lynch, X. Jia","doi":"10.1109/APS.1991.175067","DOIUrl":"https://doi.org/10.1109/APS.1991.175067","url":null,"abstract":"Initial evidence is presented which supports the parasite-free nature of a specified Helmholtz-based weak form in three dimensions. This weak form is recommended for finite-element solution of electric field problems. Representative results are shown for a simple 3-D spherical geometry where completely erroneous results occur when the double-curl equation is discretized on C/sup 0 /physically correct solutions result when the proposed weak form is used on the same mesh.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":" 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113948635","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
Iterative technique for scattering by a linear array of spheres 线性球阵散射的迭代技术
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.174765
A. Hamid, I. Ciric, M. Hamid
{"title":"Iterative technique for scattering by a linear array of spheres","authors":"A. Hamid, I. Ciric, M. Hamid","doi":"10.1109/APS.1991.174765","DOIUrl":"https://doi.org/10.1109/APS.1991.174765","url":null,"abstract":"A novel iterative procedure is proposed for the solution to the scattering by a system of conducting spheres. This approach requires the solution of the field scattered by each sphere assumed to be alone in the incident field, which acts as an incident field on the other spheres. Therefore, the first-order scattered field results from the excitation of each sphere by the incident field only, while the second-order scattered field results from the excitation of each sphere by the sum of all first-order scattered fields. Hence, this iterative process continues until the solution converges. One of the advantages of employing this approach is that the proposed solution does not require matrix inversion and therefore the desired scattered field coefficients are obtained after each iteration and used in the subsequent iteration. Numerical results are plotted for the normalized backscattering and bistatic cross section patterns for various electrical separations, radii, and angles of incidence.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124265563","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 interaction with coniferous trees: theory and experiment 电磁波与针叶树的相互作用:理论与实验
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175108
M. Karam, A. Fung, E. Mougin, A. Lopes
{"title":"Electromagnetic wave interaction with coniferous trees: theory and experiment","authors":"M. Karam, A. Fung, E. Mougin, A. Lopes","doi":"10.1109/APS.1991.175108","DOIUrl":"https://doi.org/10.1109/APS.1991.175108","url":null,"abstract":"A multilayer scattering model has been developed to investigate the relation between the tree architecture and the backscattering measurements from three kinds of coniferous trees at X-band. Each layer contains different types of scatterers to account for the tree components (leaves, branches, trunk). The Helmholtz integral along with the radiative transfer equations is used to calculate the phase matrices of the tree components and the backscattering coefficients of the trees. It is found that the echo area within any tree can be very different between VV and HH, especially at the tree top. For a group of trees. the levels of VV and HH are of the same order and their angular trend depends on the tree architecture. The main contribution to the backscattering coefficients is due to the branches.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127777885","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 profile antenna study using the physical optics hybrid method (POHM) 基于物理光学混合方法的低轮廓天线研究
Antennas and Propagation Society Symposium 1991 Digest Pub Date : 1991-06-24 DOI: 10.1109/APS.1991.175100
C.S. Kim, Y. Rahmat-Samii
{"title":"Low profile antenna study using the physical optics hybrid method (POHM)","authors":"C.S. Kim, Y. Rahmat-Samii","doi":"10.1109/APS.1991.175100","DOIUrl":"https://doi.org/10.1109/APS.1991.175100","url":null,"abstract":"POHM is applied to the design of the low-profile IFF (identification of friend or foe) airborne antenna whose height is less than 1 in. The basic idea of the POHM is that the physical optics technique is used to extend the application of the method of moments to a larger class of problems. The POHM program is tested with geometrical optics, geometrical theory of diffraction, and measured data. It is seen that the accuracy of the POHM is quite satisfactory for large ground plates. In the angular region, z>or=0, the accuracy of the POHM is very high because the physical optics currents on the body are included. However, the accuracy decreases because the POHM assumes that no currents exist on the shadow area (z<0) of the surface on the body.<<ETX>>","PeriodicalId":264366,"journal":{"name":"Antennas and Propagation Society Symposium 1991 Digest","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127788443","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: 38
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
小红书