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2007 IEEE Antennas and Propagation Society International Symposium最新文献

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Exact expressions of the orbit-curvature and curvature-radius of the Toroidal/Helical orbits. 环/螺旋轨道的轨道曲率和曲率半径的精确表达式。
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396173
R. Speciale
{"title":"Exact expressions of the orbit-curvature and curvature-radius of the Toroidal/Helical orbits.","authors":"R. Speciale","doi":"10.1109/APS.2007.4396173","DOIUrl":"https://doi.org/10.1109/APS.2007.4396173","url":null,"abstract":"Quite recently, a number of multi-beam klystrons (MBK) have been developed experimentally, and at least three different MBK models are already commercially available. Multi-beam klystrons operate at reduced electron-gun voltage, and higher total beam-current than the single-beam designs, thus preventing occasional destructive gun- diode discharges, and increasing the power-efficiency up to ~ 75%. The power-efficiency (measured as the ratio of output microwave power to input DC power) is however still limited, even in MBK, as it is obviously impossible to extract all the microwave energy from a sharply-bunched electron-beam, without having the high space-charge-density of the slowing beam force it into uncontrollable defocusing.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122726850","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
High performance normal mode helical antennas for RFID tags 用于RFID标签的高性能正常模式螺旋天线
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396926
W. Hong, W. H. Jung, Y. Yamada, N. Michishita
{"title":"High performance normal mode helical antennas for RFID tags","authors":"W. Hong, W. H. Jung, Y. Yamada, N. Michishita","doi":"10.1109/APS.2007.4396926","DOIUrl":"https://doi.org/10.1109/APS.2007.4396926","url":null,"abstract":"A 0.035 wavelength very small normal mode helical antenna is designed to achieve high antenna efficiency. Antenna gain of -3.72dBd is achieved. When this antenna is attached on a metal plate, antenna gain is increased to -0.4dBd. Communication distances of current RFID tags and NMHA tags are measured. In the case of NMHA tags, communication distances comparable to current RFID tags are ensured.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122743412","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: 18
Reflector antenna diagnosis using nearfield data 利用近场数据进行反射天线诊断
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4395521
J. Martinez-Lorenzo, C. Rappaport, A. Pino
{"title":"Reflector antenna diagnosis using nearfield data","authors":"J. Martinez-Lorenzo, C. Rappaport, A. Pino","doi":"10.1109/APS.2007.4395521","DOIUrl":"https://doi.org/10.1109/APS.2007.4395521","url":null,"abstract":"A new diagnosis method for reflector antennas using nearfield data have been presented. The application of the method for the surface profile reconstruction of a reflector antenna distorted by discrete bumps has been applied successfully.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122778726","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
Substrate integrated waveguide radial power divider for Ka-band satellite applications 用于ka波段卫星的基板集成波导径向功率分配器
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396478
D. Busuioc, G. Shaker, M. Shahabadi, S. Safavi-Naeini
{"title":"Substrate integrated waveguide radial power divider for Ka-band satellite applications","authors":"D. Busuioc, G. Shaker, M. Shahabadi, S. Safavi-Naeini","doi":"10.1109/APS.2007.4396478","DOIUrl":"https://doi.org/10.1109/APS.2007.4396478","url":null,"abstract":"","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122455938","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
Wideband antenna using non-foster loading elements 采用非培养加载元件的宽带天线
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396543
C. Di Nallo, G. Bit‐Babik, A. Faraone
{"title":"Wideband antenna using non-foster loading elements","authors":"C. Di Nallo, G. Bit‐Babik, A. Faraone","doi":"10.1109/APS.2007.4396543","DOIUrl":"https://doi.org/10.1109/APS.2007.4396543","url":null,"abstract":"This paper proposes a different approach to non-Foster or active matching. An antenna structure with two ports is considered. One port is used to couple the signal, while the other one is connected to a non-Foster network. The advantage of this configuration is that the antenna can be designed to have real input impedance, as seen from the feeding port, fairly constant across a very broad band when the active load is applied. The input reactance compensation is essentially performed by the non-Foster network, typically behaving as a negative inductor.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122456092","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: 15
A mode-based supergain approach with closely coupled monopole pair 一种基于模式的紧密耦合单极子对超增益方法
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396895
Tzung-I Lee, Y.E. Wang
{"title":"A mode-based supergain approach with closely coupled monopole pair","authors":"Tzung-I Lee, Y.E. Wang","doi":"10.1109/APS.2007.4396895","DOIUrl":"https://doi.org/10.1109/APS.2007.4396895","url":null,"abstract":"This paper focuses on a mode-based approach that can obtain the maximum gain from closely coupled antennas. Because of the small separation between the coupled dipole antennas, the antenna gain can potentially surpass the physical aperture limit and thus be called supergain. Traditional supergain antennas are actually superdirective only as the directivity can not be translated into real antenna gain because of severe impedance mismatching in those systems.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122457854","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: 7
mm-wave phased arrays in silicon with integrated antennas 带有集成天线的硅毫米波相控阵
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396510
A. Babakhani, D. Rutledge, A. Hajimiri
{"title":"mm-wave phased arrays in silicon with integrated antennas","authors":"A. Babakhani, D. Rutledge, A. Hajimiri","doi":"10.1109/APS.2007.4396510","DOIUrl":"https://doi.org/10.1109/APS.2007.4396510","url":null,"abstract":"This work demonstrates W-band integrated dipole antennas and a four channel phased transceiver implemented in IBM 130 nm silicon germanium BiCMOS process. The chip includes the complete receiver, transmitter, signal generation blocks, phase shifters, and on-chip dipole antennas. A hemispherical silicon lens with diameter of about one inch is also used to remove the substrate modes. Measurement results show a maximum antenna gain of about +8 dB.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122607337","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: 23
A sensitivity study of ray-tracing based wireless channel simulators using field measurements 射线追踪无线信道模拟器的灵敏度研究
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4395919
F. Aryanfar, F.B. Turney, L. Malek, N. Buris
{"title":"A sensitivity study of ray-tracing based wireless channel simulators using field measurements","authors":"F. Aryanfar, F.B. Turney, L. Malek, N. Buris","doi":"10.1109/APS.2007.4395919","DOIUrl":"https://doi.org/10.1109/APS.2007.4395919","url":null,"abstract":"Toward the goal of achieving robust ray tracing based channel models this paper compares simulation results using a 3D ray-tracing tool [F. Aryanfar and S. Safavi-Naeini, 1998] vs. field measurements in different environments. The tool has been validated for many outdoor and indoor scenes at different frequency bands and is capable of accurate prediction of wireless channel parameters. To test model robustness, we also examine the sensitivity of the predicted results on inputs such as angular resolution, material properties and detail of geometry.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122903586","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
Novel non planar ultra wide band quasi self-complementary antenna 一种新型非平面超宽带准自互补天线
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4396853
Germán Cortés
{"title":"Novel non planar ultra wide band quasi self-complementary antenna","authors":"Germán Cortés","doi":"10.1109/APS.2007.4396853","DOIUrl":"https://doi.org/10.1109/APS.2007.4396853","url":null,"abstract":"In this paper we are presenting a novel compact, low profile, non-planar ultra wide band feed that has an input matching better than -11 dB over a decade of frequency bandwidth. In addition, the phase center location of this feed is also invariant over the frequency band.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"239 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122989239","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: 31
A dielectric-loaded broadband antenna with frequency-insensitive E-plane radiation pattern 具有频率不敏感e平面辐射方向图的介质负载宽带天线
2007 IEEE Antennas and Propagation Society International Symposium Pub Date : 2007-06-09 DOI: 10.1109/APS.2007.4395670
F. Hoshi, S. Sugawara, T. Minewaki
{"title":"A dielectric-loaded broadband antenna with frequency-insensitive E-plane radiation pattern","authors":"F. Hoshi, S. Sugawara, T. Minewaki","doi":"10.1109/APS.2007.4395670","DOIUrl":"https://doi.org/10.1109/APS.2007.4395670","url":null,"abstract":"In this paper, a dielectric-loaded broadband antenna with frequency-insensitive E-plane radiation pattern has been designed. The optimized antenna with a dielectric has more constant and higher gain than the antenna without a dielectric and also has low return loss over wideband. Consequently, it is found that loading a dielectric and designing antenna shape is effective to improve E-plane radiation pattern and return loss simultaneously.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122997970","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
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