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9页

Characteristics of handheld terminal a modified folded dipole antenna for mobile communication 手持终端的特性。一种用于移动通信的改进折叠偶极子天线

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.2001.959529

H. Kawakami, Y. Ojiro, S. Koshikawa, S. Kogiso, G. Sato

引用次数: 0

A 2-stage Gauss-Newton reconstruction technique for improved object detection in microwave imaging 微波成像中改进目标检测的两阶段高斯-牛顿重建技术

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.2001.958837

P. Meaney, N. K. Yagnamurthy, Dun Li, E. Demidenko, K. Paulsen

{"title":"A 2-stage Gauss-Newton reconstruction technique for improved object detection in microwave imaging","authors":"P. Meaney, N. K. Yagnamurthy, Dun Li, E. Demidenko, K. Paulsen","doi":"10.1109/APS.2001.958837","DOIUrl":"https://doi.org/10.1109/APS.2001.958837","url":null,"abstract":"We have developed a 2-stage Gauss-Newton iterative reconstruction technique to improve the general image quality with our microwave tomographic imaging system. It has been applied to simulation, phantom and in vivo breast imaging experiments with quantifiable improvement in the recovered property distributions over those achieved with our original, Levenberg-Marquardt approach. The latter method incorporates spatial filtering at the end of each iteration as a means of stabilizing the reconstruction process. However, the stabilization resulted in blurring of fine structures within the imaging region, particularly in the case of small high contrast objects. The new technique utilizes the original approach as the first stage in a 2-step strategy, allowing the algorithm to identify a distribution in the neighborhood of the ideal solution without converging to an unwanted local minimum. This intermediate result is subsequently employed as an initial estimate for the second stage process-a Tikhonov-based reconstruction with a weighted Euclidean distance penalty term to constrain the final result to be within the vicinity of the intermediate solution while allowing full impact of the electric field minimization without the detrimental effects of the spatial smoothing of the first step. While this approach has enhanced the recovery of features internal to the breast during microwave examinations, it has also improved our capability to recover small, high-contrast objects. This paper illustrates quantifiable improvements in the recovery of small objects in a laboratory setting.","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":"33 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":"122125354","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

Synthesis of phased array amplitude weights for stationary sidelobe envelopes using genetic algorithms 用遗传算法合成静止旁瓣包络相控阵振幅权值

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.2001.959558

D. Boeringer, D. Machuga, D. Werner

引用次数: 8

Design of dual-band L-probe patch antenna for mobile communications 移动通信用双频l探针贴片天线的设计

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.2001.959408

Y. H. Shum, K. Luk

引用次数: 3

Printed dipole radiating elements for broadband and wide scan angle active phased array 用于宽频宽扫描角有源相控阵的印刷偶极子辐射元件

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.2001.959585

U. K. Revankar, Harishchandra

引用次数: 9

Pulsed radiation by a phased semi-infinite periodic planar array of dipoles 偶极子相控半无限周期平面阵列的脉冲辐射

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.2001.959749

Filippo Capolino, L. Felsen

{"title":"Pulsed radiation by a phased semi-infinite periodic planar array of dipoles","authors":"Filippo Capolino, L. Felsen","doi":"10.1109/APS.2001.959749","DOIUrl":"https://doi.org/10.1109/APS.2001.959749","url":null,"abstract":"To gain an understanding of the sparsely explored time domain (TD) behavior of periodic arrays of radiating or scattering elements (phased array antennas, frequency selective surfaces and related applications), we have initiated a systematic investigation of relevant canonical TD dipole-excited Green's functions (GF), which so far include those for infinite and truncated line periodic arrays, as well as for infinite planar periodic arrays. Such Green's functions have been parameterized in terms of TD-Floquet waves (FW) of cylindrical and planar type, and truncation-induced TD-FW-modulated diffractions. Such waves on semi-infinite and finite square arrays of dipoles have been investigated in the frequency domain (FD), and shown to be useful in practical array applications. The present contribution extends our TD studies to an infinite periodic sequentially pulsed semi-infinite planar array. The phenomenology associated with truncated TD-FW and truncation-induced diffraction is explained in terms of instantaneous frequencies aided by asymptotic parameterization. Preliminary numerical results demonstrate the efficiency of the TD-FW algorithms.","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":"129419471","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

Electronic beam steering using a varactor-tuned impedance surface 利用变容调谐阻抗表面的电子束转向

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.2001.958820

D. Sievenpiper, J. Schaffner, B. Loo, G. Tangonan, R. Harold, J. Pikulski, R. Garcia

引用次数: 49

Design of the GE aircraft engine compact range facility GE飞机发动机紧凑型航程设施的设计

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.2001.959491

R. Silz

引用次数: 2

Novel approach to construct temporal basis functions for time-domain integral equation method 时域积分方程法中构造时间基函数的新方法

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.2001.959426

Jin-Lin Hu, C. Chan

引用次数: 4

Coverage analysis over terrain profiles using an adaptation of the spectral accelerated forward-backward method 基于光谱加速正-倒向法的地形剖面覆盖分析

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.2001.960024

J. Fernández, M. Pino, F. Obelleiro, J. Rodríguez

引用次数: 1