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2007 IEEE International Vacuum Electronics Conference最新文献

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Design of high electron efficiency for millimetre wave TWT 毫米波 TWT 的高电子效率设计
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283219
Mingguang Huang, Shaolun Cai, Jinjun Feng
{"title":"Design of high electron efficiency for millimetre wave TWT","authors":"Mingguang Huang, Shaolun Cai, Jinjun Feng","doi":"10.1109/IVELEC.2007.4283219","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283219","url":null,"abstract":"An optimised design for high electron efficiency in the interaction in the interaction section has been put forward and simulated with TWTCAD. The experimental results for a Ka band TWT showed that the interaction efficiency reached 20% with 3 GHz bandwidth.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126432695","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
Digital adaptable Pre-Distortion Linearization 数字自适应预失真线性化
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283386
M. Khilla
{"title":"Digital adaptable Pre-Distortion Linearization","authors":"M. Khilla","doi":"10.1109/IVELEC.2007.4283386","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283386","url":null,"abstract":"This paper describes an adaptive digital RF predistorter using lookup table (LUT), phase shift and attenuator modules. The LUT are deduced from the behaviour of input and output signals of the high power amplifier (HPA). The measured intermodulation product of a linearized SSPA reveals a significant improvement despite the non monotonic behaviour of the HPA nonlinearities. The experimental evaluation is carried out using an RF digital predistorter prototype that mainly includes an envelop detector, phase shift and attenuator modules, field programmable gate array for the LUT and fast analog/digital and digital/analog converters.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121440074","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
Design of a 1.3 GHz 120kW CW IOT 1.3 GHz 120kW连续波物联网设计
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283265
Yanxia Li, M. Cusick, C. Meyer, P. Krzemiński, B. Stockwell
{"title":"Design of a 1.3 GHz 120kW CW IOT","authors":"Yanxia Li, M. Cusick, C. Meyer, P. Krzemiński, B. Stockwell","doi":"10.1109/IVELEC.2007.4283265","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283265","url":null,"abstract":"After successfully designed and manufactured 40 kW CW/85 kW peak 1.3 GHz inductive output tube (IOT) amplifiers, we have been working on pushing the power of IOT to a new level, 120 kW CW. The challenges are so significant that simple modifications to the lower power version IOT would not be adequate. A complete new design is necessary for increased power level and reliable performance. In this paper, we will describe the tasks conducted for the IOT amplifier design.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125961632","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
Improved Gyrotron Collectors 改进型回旋管收集器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283212
L. Ives, J. Neilson, Liqun Song
{"title":"Improved Gyrotron Collectors","authors":"L. Ives, J. Neilson, Liqun Song","doi":"10.1109/IVELEC.2007.4283212","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283212","url":null,"abstract":"Electron cyclotron heating (ECH) is well established as an effective mechanism for heating tokamak plasmas and is effective for controlling instabilities that can disrupt operation.Calabazas Creek Research, Inc. (CCR) is pursuing two approaches to improve collectors for high average power operation. The first is to increase the strength of the collector surface to withstand the anticipated power cycling. The second is to investigate alternative magnetic field configurations that adequately disperse the collector power without sweeping. The presentation present the results of this research.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126667542","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
Development of All-metal Field Emitter Arrays for high Current Applications 大电流全金属场发射阵列的研制
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283345
E. Kirk, S. Tsujino, H. Sehr, T. Vogel, J. Gobrecht, R. Ganter, A. Wrulich
{"title":"Development of All-metal Field Emitter Arrays for high Current Applications","authors":"E. Kirk, S. Tsujino, H. Sehr, T. Vogel, J. Gobrecht, R. Ganter, A. Wrulich","doi":"10.1109/IVELEC.2007.4283345","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283345","url":null,"abstract":"We are developing high-current field emitter arrays for the PSI-FEL project. By sputtering into molds and electroplating, we produce metal tips on a metal substrate. The single tip current is ~ 0.1 - 1.0 muA.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121098507","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
Dispenser Cathode Activation Behavior Relative to Surface Porosity as Seen in SEM Images 与表面孔隙率相关的点胶器阴极活化行为，如扫描电镜图像所示
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283254
J. Tarter, R.C. Dawson, B.C.D. Williams, M.O. Khan
{"title":"Dispenser Cathode Activation Behavior Relative to Surface Porosity as Seen in SEM Images","authors":"J. Tarter, R.C. Dawson, B.C.D. Williams, M.O. Khan","doi":"10.1109/IVELEC.2007.4283254","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283254","url":null,"abstract":"This study reports on the initial activation behavior of dispenser cathodes with smeared pores, normal porosity, and with no visible pores, as viewed using an SEM.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"42 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120997520","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
Electromagnetic Field Shaping for Efficiency Enhancement in Terahertz Folded-Waveguide Traveling-Wave Tube Slow-Wave Circuit Design 电磁场整形提高太赫兹折叠波导行波管慢波电路设计效率
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283222
J.D. Wilson
{"title":"Electromagnetic Field Shaping for Efficiency Enhancement in Terahertz Folded-Waveguide Traveling-Wave Tube Slow-Wave Circuit Design","authors":"J.D. Wilson","doi":"10.1109/IVELEC.2007.4283222","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283222","url":null,"abstract":"In this paper, there is much interest in using vacuum electronics in the terahertz regime because of their superior power and efficiency capabilities compared to solid state power amplifiers (SSPA's) at high frequencies. However power and efficiency levels with conventional vacuum electronics devices are still quite low in the terahertz regime because of the small size of the circuits and high attenuation. In this presentation, we will show computational results from our investigation of using holey metamaterials, corrugations, and frequency selective surfaces for electromagnetic field shaping to increase the efficiency and power in terahertz folded- waveguide travelling-wave tube slow-wave circuits.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"72 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113970219","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
On-Orbit Performance of the CloudSat EIK and Future Space Missions 云卫星EIK的在轨性能和未来空间任务
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283288
A. Roitman, M. Viant, C. Nilsen, M. Cattelino, D. Berry, B. Steer, W. Harvey, I. Haque, E. Im
{"title":"On-Orbit Performance of the CloudSat EIK and Future Space Missions","authors":"A. Roitman, M. Viant, C. Nilsen, M. Cattelino, D. Berry, B. Steer, W. Harvey, I. Haque, E. Im","doi":"10.1109/IVELEC.2007.4283288","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283288","url":null,"abstract":"This paper presents on-orbit performance of the CloudSat extended interaction klystron (EIK) and reviews requirements, design and performance of EIK's for future space missions. The CloudSat mission provides cross-sectional view of clouds with information on their thickness, altitude, optical properties, water and ice content. It is concluded that following successful development and on-orbit operation of the CloudSat EIK, more flight models of W-band and Ka-band EIK's are currently under development.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122445886","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
Multi-Amplifiers Architectures for Power Reconfigurability 电源可重构的多放大器架构
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283292
M. Aloisio, P. Angeletti
{"title":"Multi-Amplifiers Architectures for Power Reconfigurability","authors":"M. Aloisio, P. Angeletti","doi":"10.1109/IVELEC.2007.4283292","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283292","url":null,"abstract":"In communication satellite systems, the reconfigurability of the RF power among different beams and channels can be employed in alternative to the well-known multiple antenna beams, in order to improve the payload utilization. The performance of a reconfigurable payload strictly depends on the architecture of the high-power section. Two multi- amplifiers architectures, one based on bias-adjustable Traveling-wave Tubes (flex-TWTAs), the other based on Multiport Amplifiers, will be traded-off against the achievable efficiency and degree of flexibility at payload level.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846818","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
New Travelling Wave Tubes for L-Band and S-Band in Orbit Applications l波段和s波段新型行波管在轨应用
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283294
P. Ehret, E. Bosch, W. Durr
{"title":"New Travelling Wave Tubes for L-Band and S-Band in Orbit Applications","authors":"P. Ehret, E. Bosch, W. Durr","doi":"10.1109/IVELEC.2007.4283294","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283294","url":null,"abstract":"The ongoing development in satellite application requires more and more high power travelling wave tubes (TWT) to relieve the requirements for end user terminals and to improve the quality and channel capacity of the satellite down link. Also more types of TWTs are demanded by the customers to obtain a higher flexibility in satellite design with respect to output power, weight and thermal requirements. Thales Electron Devices (TED) therefore has filled up its portfolio of different TWTs for L-Band and S-Band. This paper will present some technical details and illustrate the performance of state- of-the-art tubes.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115714355","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
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