IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)最新文献_第5页

Reduced size single and dual band linear polarized microstrip antennas for mobile communications 缩小尺寸的单双波段线性极化微带天线用于移动通信

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959495

R. R. Ramirez, H. Elsadek, L. Jofre, F. De Flaviis

{"title":"Reduced size single and dual band linear polarized microstrip antennas for mobile communications","authors":"R. R. Ramirez, H. Elsadek, L. Jofre, F. De Flaviis","doi":"10.1109/APS.2001.959495","DOIUrl":"https://doi.org/10.1109/APS.2001.959495","url":null,"abstract":"Two techniques to reduce the physical size of circular and rectangular microstrip patch antennas are presented. By utilizing the symmetry of the resonant current distribution, the size of the antenna can be reduced by one-half of the original patch. Second, slits are inserted within the antenna which are perpendicular to the resonant current. This forces the current to flow around the obstacles which has the effect of reducing the resonant frequency. Using slits, an antenna of one-fourth the area of the original patch can be realized. Lastly, using two patches displaced laterally or vertically an antenna with dual band capabilities can be realized. The two frequency bands, 1.8, 2.4 GHz and 5.2, 5.7 GHz, are chosen to lie within the existing PCS and Bluetooth bands and the two future Bluetooth frequency bands, respectively. The antenna geometry is an aperture coupled microstrip antenna. The reduced size and thin substrate thicknesses give compatibility with portable communications systems.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121571437","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

Progressive development of portable VSAT antennas for ST1 and INTELSAT 用于ST1和INTELSAT的便携式VSAT天线的逐步发展

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959613

N. Karmakar, S. Padhi, Cheolho Han, S. Sivakumar, S. Aditya

引用次数: 1

Point-based high-order moment method for thin wire scattering and antenna analysis 基于点的高阶矩法细线散射与天线分析

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959780

A. Zhu, S. Gedney, K. Whites

{"title":"Point-based high-order moment method for thin wire scattering and antenna analysis","authors":"A. Zhu, S. Gedney, K. Whites","doi":"10.1109/APS.2001.959780","DOIUrl":"https://doi.org/10.1109/APS.2001.959780","url":null,"abstract":"Electromagnetic scattering method of moment (MoM) solutions typically employ low-order basis and testing functions. That is functions that lead to fixed error convergence rates. In contrast to a low-order scheme, a high-order method should lead to controllable error convergence. Further, a high-order scheme should reduce the solution error with a modest increase in computational resources and complexity. A number of high-order basis functions have been introduced for MoM solutions employing such basis can result in high-order accuracy using a Galerkin solution. The difficulty is that a Galerkin scheme results in an expensive double integration that must be computed to controllable accuracy. A novel high-order method is introduced for the thin-wire problem. The method is posed in a Galerkin form. A simple transformation is then applied that leads to a point-matched form of the operator, subsequently eliminating the outer integration. Through numerical examples based on both scattering of thin wires and antenna radiation, it is demonstrated that the method leads to true high-order convergence.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127634985","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

Reconstruction of electrical conductivity by EBA enhanced CSI method EBA增强CSI法重建电导率

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959808

Zhong Qing Zhang, Q. Liu

引用次数: 0

Computer-aided simulation of guided waves in dielectric and optical waveguides 介质和光波导中导波的计算机辅助模拟

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.958874

R. Shubair, E. M. Alardi

引用次数: 0

An accurate scheme for the numerical solution of the time domain electric field integral equation 时域电场积分方程数值解的精确格式

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959513

D. Weile, B. Shanker, E. Michielssen

{"title":"An accurate scheme for the numerical solution of the time domain electric field integral equation","authors":"D. Weile, B. Shanker, E. Michielssen","doi":"10.1109/APS.2001.959513","DOIUrl":"https://doi.org/10.1109/APS.2001.959513","url":null,"abstract":"Time domain integral equation (TDIE) based methods for the solution of electromagnetic scattering and radiation problems have steadily increased in popularity. The accuracy of TDIE techniques remains largely unstudied. Though methods for improving the accuracy and convergence properties of the spatial discretization of TDIEs can be based on well-known frequency domain method of moments (MoM) techniques, temporal discretization methods are still poorly understood. In this work, a band-limited interpolation function (BLIF) is used as the temporal basis function to improve this state of affairs. It is shown that TDIE solutions created using BLIFs for temporal interpolation converge exponentially to the solution provided by the MoM with the amount of work required to produce them. In addition, unlike the method presented by Weile, Shanker, Ergin, and Michielssen (see Antennas and Propagation International Symposium, Salt Lake City, UT, 2000), the method presented here is shown to work on both the electric and magnetic field integral equations.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126537521","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: 24

Dual band dual polarisation slotted microstrip patch antenna element 双频双极化开槽微带贴片天线元件

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959402

T. Condello, C. Peixeiro

引用次数: 3

The geometrical theory of aberrations of classical offset dual-reflector antennas 经典偏置双反射面天线像差的几何理论

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.958907

Se-Wook Chang, A. Prata

引用次数: 3

Comparison of two flat reflector-type designs for dual-polarization, dual-band operation 双偏振、双波段工作两种平面反射型设计的比较

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.959720

S. Duffy, S. Targonski

{"title":"Comparison of two flat reflector-type designs for dual-polarization, dual-band operation","authors":"S. Duffy, S. Targonski","doi":"10.1109/APS.2001.959720","DOIUrl":"https://doi.org/10.1109/APS.2001.959720","url":null,"abstract":"The parabolic reflector remains an essential antenna for high-gain applications. This is a result of its desirable characteristics based on geometric optics. These include relative frequency independence for sufficiently large apertures and high aperture efficiency. However, the parabolic reflector occupies a large volume. This may be aesthetically unappealing on the sides of buildings and structures. Also, from a mobile user perspective, a desirable characteristic is having a large aperture during operation while having a small volume when packed away and not in use. The parabolic reflector is typically constructed of multiple petals for mobile uses, but it does not pack into as small a volume as a flat, thin antenna would due to the curvature of the paraboloid. Therefore, the primary goal of the antennas studied in this work is developing flat reflector antennas to utilize the advantages of large reflector apertures while remaining capable of packing into a small volume. In addition, system requirements dictated dual-band, dual-polarized operation. Two flat reflectors are compared: a reflectarray and a zoned reflector. While each design is inherently narrow-band, methods of achieving dual-band operation were employed.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115857736","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

Analyses of voluminous metallic antenna covered with dielectric layer 覆盖介质层的大型金属天线分析

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Pub Date : 2001-07-08 DOI: 10.1109/APS.2001.960137

R. Zaridze, G. Bit‐Babik, K. Tavzarashvili, A. Bijamov, G. Ghvedashvili

引用次数: 5