1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184)最新文献_第2页

Printed antenna arrays: examples of commercial applications 印刷天线阵列:商业应用的例子

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730666

J. Daniel, M. Himdi, D. Thouroude

引用次数: 10

Dielectric resonator antenna technology for wireless applications 无线应用的介电谐振器天线技术

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730669

A. Petosa, A. Ittipiboon, M. Cuhaci

引用次数: 5

Multimode rectangular microstrip antenna for GPS applications 用于GPS应用的多模矩形微带天线

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730677

M. Solomon

引用次数: 11

Multiple sources neural network direction finding with arbitrary separations 任意分离的多源神经网络测向

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730646

A.H. El Zooghby, C. Christodoulou, M. Georgiopoulos

引用次数: 2

FDTD analysis of human head-mobile phone interaction in terms of specific absorption rate calculations and antenna design FDTD分析人-手机交互作用的比吸收率计算和天线设计

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730661

F. Akleman, L. Sevgi

{"title":"FDTD analysis of human head-mobile phone interaction in terms of specific absorption rate calculations and antenna design","authors":"F. Akleman, L. Sevgi","doi":"10.1109/APWC.1998.730661","DOIUrl":"https://doi.org/10.1109/APWC.1998.730661","url":null,"abstract":"In this study, the finite-difference time-domain (FDTD) method is used to model mutual effects of a mobile phone and a human head in terms of both biological effects and antenna design. A discrete human head model and a hand-held receiver with various antennas mounted on top of it, are located within a three dimensional (3D) FDTD algorithm is built in Cartesian coordinates. Near fields are simulated directly in the time domain for both sinusoidal and pulse type antenna excitations. The antenna power, input impedance, absorbed power and the specific absorption rate (SAR) distribution inside the head near the hand-held receiver are calculated for various antenna types and human head/hand-held receiver locations. The simulations are carried out for both European GSM and DECT systems (at 900 and 1800 MHz, respectively). The SAR distributions for various vertical and horizontal slices of the head are calculated and are shown to agree with the available calculation and measurement results. Besides, the effects of the human head on the antenna radiation pattern are calculated where far field simulations are obtained via a time-domain near-to-far-field (NTFF) transformation based on Huygen's principle. Various hand-held receiver antennas, including a quarter-wavelength wire, IFA, PIFA, symmetrical and asymmetrical square or rectangular printed loops, are investigated in terms of their radiation pattern, gain and efficiency. Different antenna mountings are used and their effects to both antenna performance and SAR distribution in the head are shown.","PeriodicalId":246376,"journal":{"name":"1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122119362","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: 14

Broadband sector zone base station antennas 宽带扇形区基站天线

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730667

F. Tefiku

{"title":"Broadband sector zone base station antennas","authors":"F. Tefiku","doi":"10.1109/APWC.1998.730667","DOIUrl":"https://doi.org/10.1109/APWC.1998.730667","url":null,"abstract":"With the continuous growth of commercial communications systems, such as cellular communications systems, the need for low-cost antennas has increased. This paper presents printed strip dipole antennas over plane or shaped reflectors that have acceptable impedance matching and radiation patterns over a frequency range of more than 30 percent. The radiating element used for these antennas represents a series-fed array of two closely spaced printed strip dipoles, which have been shown to have broadband capability. We show that such antennas can be designed to have broadband capabilities when placed above a conducting reflector. To achieve a desired beamwidth, the reflector can be shaped, resulting in an antenna that is well-matched and has acceptable radiation patterns over a wide frequency range. Since constructional simplicity and low manufacturing cost are retained, the antenna is very well-suited to being used as a radiating element in sector zone base stations of cellular communications systems. Design examples of broadband antennas with H-plane half-power beamwidths of 120/spl deg/, 90/spl deg/, and 60/spl deg/, suitable for 3-sector, 4-sector, and 6-sector zone use, respectively, are shown.","PeriodicalId":246376,"journal":{"name":"1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130865915","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: 9

EM interactions between handheld antennas and human: anatomical head vs. multi-layered spherical head 手持天线与人体之间的电磁相互作用:解剖头与多层球形头

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730649

K.W. Kim, Y. Rahmat-Samii

引用次数: 7

Validation of FDTD handset and head patterns by measurement FDTD手机和头部模式的测量验证

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730663

C. Trueman, S. Kubina, J. E. Roy, W.R. Lauber

引用次数: 2

Radial basis function neural network algorithm for adaptive beamforming in cellular communication systems 蜂窝通信系统中自适应波束形成的径向基函数神经网络算法

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730645

A.H. El Zooghby, C. Christodoulou, M. Georgiopoulos

引用次数: 3

Effects of element pattern for adaptive array in W-CDMA mobile radio W-CDMA移动无线电中自适应阵列单元方向的影响

1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184) Pub Date : 1998-11-01 DOI: 10.1109/APWC.1998.730643

T. Ihara, R. Yamaguchi

{"title":"Effects of element pattern for adaptive array in W-CDMA mobile radio","authors":"T. Ihara, R. Yamaguchi","doi":"10.1109/APWC.1998.730643","DOIUrl":"https://doi.org/10.1109/APWC.1998.730643","url":null,"abstract":"The next generation of land mobile communication systems must offer high bit data rates for multimedia and high-quality services. Adaptive arrays are considered to be a key technology to satisfy these demands, and applying them to land mobile radio has been investigated extensively. However, those reports mainly focus on structures of adaptive receivers or adaptive algorithms, few reports consider antenna arrays, especially the effect of the pattern of the antenna elements of the array antenna on adaptive array performance. The effects of the antenna element pattern on performance have been reported, but the investigation was of adaptive array characteristics for a TDMA cellular system. Recently, W-CDMA has been investigated extensively as an access technology for the third-generation mobile radio, IMT-2000. Interference environments are so different between the TDMA system and W-CDMA (DS-CDMA) system, that it is unknown whether their study can be applied to W-CDMA adaptive arrays or not. We examine the performance of an adaptive array receiver of a base station for a W-CDMA system by computer simulation from the viewpoint of the element pattern of the array antenna. We then discuss the relationship between 3 dB element beamwidth and service area in satisfying a bit error rate (BER) of <10/sup -3/.","PeriodicalId":246376,"journal":{"name":"1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123291771","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