IEEE Antennas and Propagation Society International Symposium. 1996 Digest最新文献

Microstrip patch antenna receiving array operating in the Ku band 工作在Ku波段的微带贴片天线接收阵列

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 2013-03-12 DOI: 10.1109/aps.1996.549976

Douglas A. Walcher, Kai-Fong Lee, R. Q. Lee, Michael Cauley, Liz McQuaid

引用次数: 1

Multiple beam lens antenna for LEO communication satellite 用于低轨道通信卫星的多波束透镜天线

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549925

K.K. Chan, B. Wallace

引用次数: 0

Physical optics for the scattering analysis of dipole waves from strips on a grounded dielectric slab 介电板接地条偶极子波散射分析的物理光学

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549870

M. Ando, Shuguang Chen, Y. Sato, M. Oodo

引用次数: 0

Optimization of ground plane for improved GPS antenna performance 提高GPS天线性能的地平面优化

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549823

T. Milligan, P. K. Kelly

引用次数: 3

Multilevel fast multipole algorithm (MLDM) for complex objects 复杂目标的多级快速多极算法

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549936

J.M. Song, C. Lu, W. Chew

引用次数: 1

On smart base-station antennas for mobile communications 用于移动通信的智能基站天线

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549694

T. Vu, G. Jonas

{"title":"On smart base-station antennas for mobile communications","authors":"T. Vu, G. Jonas","doi":"10.1109/APS.1996.549694","DOIUrl":"https://doi.org/10.1109/APS.1996.549694","url":null,"abstract":"Conventional base-station sector antennas for mobile communications are relatively inexpensive, but do not give an effective protection against interference. An alternative approach is to use directional adaptive phased arrays, which could additionally provide an increased protection against multipath fading and an ability to match antenna radiation to local conditions. For a narrow-band mobile system, we believe that a DSP-based phased array would provide a great deal of flexibility. As the signal from each element of the array is down converted to a low IF frequency and digitised before being processed, the phased array may be treated as a bank of digital spatial filters, each of which will pass signals coming from a given direction. The principle is fairly simple, because even though the signal received from each element of the array may contain information from many sources coming from many different directions, this signal may be stored in a common memory, and then read out for subsequent processing by all the 'filters' of the bank. This paper discusses a concept-demonstration model which we have built and tested. The experimental model was designed for the 'uplink', with the base-station antenna receiving a speech-modulated carrier transmitted by a moving terminal. For this purpose, the array is analysed in its receive mode, and the output of this digital spatial filter in response to a desired source in the presence of a set of interference is described.","PeriodicalId":267643,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1996 Digest","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114900638","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

Aircraft radar imaging with partially coherent signal 部分相干信号的飞机雷达成像

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.550043

A. Pasmurov, V. P. Likhachev

引用次数: 1

FDTD computation of power deposition in the head for cellular telephones 蜂窝电话机头功率沉积的FDTD计算

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549951

C. Furse, G. Lazzi, O. Gandhi

引用次数: 3

A K-band circularly polarized cavity backed dielectric resonator 一种k波段圆极化腔背介质谐振器

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549700

J. Carrie, K. Esselle, D. Roscoe, A. Ittipiboon, A. Sebak, L. Shafai

{"title":"A K-band circularly polarized cavity backed dielectric resonator","authors":"J. Carrie, K. Esselle, D. Roscoe, A. Ittipiboon, A. Sebak, L. Shafai","doi":"10.1109/APS.1996.549700","DOIUrl":"https://doi.org/10.1109/APS.1996.549700","url":null,"abstract":"A high efficiency linear polarized antenna consisting of a patch fed cavity has already been developed for use in personal communication terminals. It possesses several desirable features for active array applications, particularly the ease of RF component integration and heat removal. As part of the continued development of this antenna, it is very desirable to extend the capabilities to include future circularly polarized (CP) applications. The logical step for achieving the CP performance is to replace the linearly polarized feed patch with a single point feed CP patch. A single point feed is preferred in order to maintain the simplicity of the feed network. This approach, however, has a major drawback of possessing a narrow axial ratio bandwidth. To improve the axial ratio bandwidth, an alternative CP feed antenna is required. Research in circularly polarized dielectric resonator antennas (DRAs) has shown that a wide axial ratio bandwidth can be achieved from a single point fed DRA. The performance of the dielectric cross within a cavity structure is investigated. The optimization of the geometry and the effects on overall operation are discussed.","PeriodicalId":267643,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1996 Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116824056","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: 12

Antenna gain measurements using improved radio star flux density expressions 使用改进的射电星通量密度表达式测量天线增益

IEEE Antennas and Propagation Society International Symposium. 1996 Digest Pub Date : 1996-07-21 DOI: 10.1109/APS.1996.549568

E. Ekelman, C. Abler

{"title":"Antenna gain measurements using improved radio star flux density expressions","authors":"E. Ekelman, C. Abler","doi":"10.1109/APS.1996.549568","DOIUrl":"https://doi.org/10.1109/APS.1996.549568","url":null,"abstract":"Radio stars have been used to measure the gain of large antennas for many years. The straightforward expressions required, and the simple, direct measurements involved have made this method the most accurate available for this class of antennas. Radio astronomers provided the bases for the technique by measuring the flux density of various celestial sources having strong radio emission at frequencies from 100 MHz to 100 GHz. Many papers have documented measurements which have lead to refinements and improvements in the flux density expressions, as well as other contributing factors such as angular extent corrections and polarization effects. The existing equations extracted from current literature are presented, along with data to support new and improved flux density expressions that provide more accurate results. A solution is presented to discrepancies found when radio sources are used to measure antenna gain. Flux density expressions for radio sources Cassiopeia A (Cas A), Taurus A (Tau A), and Cygnus A (Cyg A) were examined in published data. Using Cas A as a reference, the flux expressions for Tau A and Cyg A were adjusted to eliminate the characteristically lower-than-expected results obtained when these two radio sources are used to measure antenna gain. With these new, improved expressions, Cas A, Tau A, and Cyg A give similar gain results, to within an observable average of /spl plusmn/0.04 dB, for both C-band and Ku-band antennas.","PeriodicalId":267643,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1996 Digest","volume":"128 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128390277","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