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4页

Electromagnetic wave scattering by two rectangular troughs on a ground plane - H polarization case 地平面上两个矩形槽的电磁波散射- H极化情况

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.2001.959572

R. Sato, H. Shirai

引用次数: 3

Ionospheric total electron content measurements by analyzing GPS data of Ankara, Turkey 通过分析土耳其安卡拉的GPS数据测量电离层总电子含量

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.2001.960049

C. B. Erol, P. Guven

引用次数: 0

FDTD calculation of SAR for the monopole antenna on the conducting box in terms of the structure near by feed 基于馈源附近结构的导盒上单极天线SAR时域有限差分计算

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.2001.959625

J. Byun, Juhyung Lee

引用次数: 2

Passive microwave imaging from spacecraft 航天器被动微波成像

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.2001.959536

C. Swift

引用次数: 1

Measurement system for the Green Bank Telescope 格林班克望远镜测量系统

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.2001.959534

D. H. Parker, S. Srikanth

{"title":"Measurement system for the Green Bank Telescope","authors":"D. H. Parker, S. Srikanth","doi":"10.1109/APS.2001.959534","DOIUrl":"https://doi.org/10.1109/APS.2001.959534","url":null,"abstract":"The Green Bank Telescope (GBT) at the National Radio Astronomy Observatory (NRAO) site in Green Bank, WV, was completed in June 2000. At the time of writing, the GBT is undergoing testing of the various systems and characterization of the actual structural modes. It is the largest, fully-steerable radio telescope in the world. The main reflector which is a solid-surface paraboloid has an unblocked 100-meter projected aperture. The telescope will operate at prime focus from 25 MHz to 1200 MHz and at Gregorian focus from 1.15 GHz to /spl ges/ 100 GHz. It is a state-of-the-art instrument with an active surface to compensate for deformations of the primary reflector backup structure due to external loads. The GBT has a unique six-degree of freedom subreflector and a three-degree of freedom prime focus mount that allow realigning of the optics which is required as the telescope moves in elevation. A receiver turret that holds 8 secondary focus receivers will provide rapid frequency agility for the telescope. This paper describes the metrology system, based on laser rangefinders, that has been developed at NRAO for the realization of the active surface and precision pointing of the GBT.","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":"72 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":"124018294","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

Bowtie microstrip patch antenna based on the Sierpinski fractal 基于Sierpinski分形的领结微带贴片天线

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.2001.960058

J. Anguera, C. Puente, C. Borja, R. Montero

引用次数: 19

Phase integration for two dimensional radar image formation 二维雷达图像形成的相位积分

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.2001.958854

R. Bonneau

{"title":"Phase integration for two dimensional radar image formation","authors":"R. Bonneau","doi":"10.1109/APS.2001.958854","DOIUrl":"https://doi.org/10.1109/APS.2001.958854","url":null,"abstract":"Radar imaging is traditionally performed by wideband radar systems to achieve high range resolution of objects. Unfortunately due to cost, frequency allocation, or physical limitations, most radars are unable to operate over a broad range of frequencies. We propose a methodology to achieve high range resolution by phase integration in the frequency domain of a narrowband radar signal. This process compares with the radio camera interferometry approach in that it uses a phased array to achieve spatial resolution and a ground penetration image formation process that spatially samples a region in two dimensions. Our approach unifies the previous approaches, and integrate return signals in the frequency domain which simplifies the registration of the return signal. We begin by describing the basic methodology of collecting data with a two dimensional antenna array using a narrowband linear FM signal. We then describe how each phase bin is converted to the frequency domain and integrated in time. Next, we discuss the Fourier transform followed by the pulse decompression process. Finally we discuss the sampling approach for the two dimensional synthetic aperture and show simulated results.","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":"45 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120893369","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

Reduced complexity analysis of microstrip patch arrays, conformally mounted to a cylindrical conducting surface 降低复杂性分析微带贴片阵列，共形安装在圆柱形导电表面

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.2001.959734

H. Anastassiu, A. Kostaridis, C. Biniaris, D. Kaklamani

{"title":"Reduced complexity analysis of microstrip patch arrays, conformally mounted to a cylindrical conducting surface","authors":"H. Anastassiu, A. Kostaridis, C. Biniaris, D. Kaklamani","doi":"10.1109/APS.2001.959734","DOIUrl":"https://doi.org/10.1109/APS.2001.959734","url":null,"abstract":"Standard integral equation techniques, such as the moment method (MoM) face difficulties for very large antenna sizes, since the memory and CPU time they require may increase beyond computational limits. The method of auxiliary sources (MAS) demands substantially lower CPU time than MoM, retaining, nevertheless, the MoM accuracy. Unfortunately, its capabilities are depleted when applied to thin or open structures, due to the mandatory proximity of source and collocation points occurring in such geometries. The modified method of auxiliary sources (MMAS) has been developed to circumvent this difficulty, and has been successfully applied to the analysis of microstrip patch antennas, even when the dielectric substrate is thin enough to render conventional MAS inapplicable. In this paper, the MMAS is applied to the analysis of microstrip patch arrays, conformal to cylindrical surfaces, a model that simulates a communication antenna mounted to an aircraft fuselage. Several unpublished features of MMAS are discussed, whereas extensive, recently produced numerical results are presented and compared to reference solutions, validating the reliability and versatility of the method.","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":"5 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":"114192671","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

New computationally efficient 2.5D and 3D ray tracing algorithms for modeling propagation environments 新的计算效率的2.5D和3D光线跟踪算法建模传播环境

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.2001.958891

Zhijun Zhang, Z. Yun, M. Iskander

引用次数: 8

A simple and effective method to analyze field distribution in curved dielectric waveguides 一种分析弯曲介质波导场分布的简单有效方法

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.2001.959710

M. Kaiyu, Xu Shanjia

引用次数: 0