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2008 IEEE International Vacuum Electronics Conference最新文献

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Development of a high average power W-band TWT 高平均功率w波段行波管的研制
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556335
A. Theiss, C. Meadows, K. Montgomery, M. Martin
{"title":"Development of a high average power W-band TWT","authors":"A. Theiss, C. Meadows, K. Montgomery, M. Martin","doi":"10.1109/IVELEC.2008.4556335","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556335","url":null,"abstract":"A first-unit full-gain W-Band folded-waveguide TWT has been rebuilt and is scheduled for hot test. This light-weight integral pole piece TWT is expected to achieve high average power by utilizing multiple L-3 proprietary features: a PPM-type, folded-waveguide circuit that has close-proximity copper-block heat-sinks [1]; a broadband block-type RF window that demonstrated 1500 watts of average-power transmission with a 33% bandwidth match at Ka- band [1]; a tetrode gun that provides high-PRF modulation to diode-gun-quality electron beams [2] [3]; and voided iron parts that permit pole pieces with thicknesses that exceed an RF period to supply focusing fields with lambdaP/L values around 10 for 4-kilowatt beams [4].","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133702003","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: 10
Field emission properties of carbon nanotube pillar arrays patterned directly on metal alloy surfaces 金属合金表面碳纳米管柱阵列的场发射特性
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556390
J. Killian, D. Niemann, N. Zuckerman, J. Silan, B. Ribaya, M. Rahman, M. Meyyappan, C. Nguyen
{"title":"Field emission properties of carbon nanotube pillar arrays patterned directly on metal alloy surfaces","authors":"J. Killian, D. Niemann, N. Zuckerman, J. Silan, B. Ribaya, M. Rahman, M. Meyyappan, C. Nguyen","doi":"10.1109/IVELEC.2008.4556390","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556390","url":null,"abstract":"Carbon nanotube pillar arrays (CPAs) for cold field emission were fabricated using a conventional photolithography process, and the geometry of these arrays was studied and the effect of pillar height on field emission was quantified. Our CPA samples achieved turn-on fields as low as 0.9 V/mum and stable current densities of 10 mA/cm2 at applied field lower than 6V/mum.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124590022","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
On the prospects of increasing gain, efficiency and linearity of TV IOTs 浅谈提高电视物联网增益、效率和线性度的前景
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556396
A. Galdetskiy, A. Korolev
{"title":"On the prospects of increasing gain, efficiency and linearity of TV IOTs","authors":"A. Galdetskiy, A. Korolev","doi":"10.1109/IVELEC.2008.4556396","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556396","url":null,"abstract":"The increasing of IOTpsilas gain on 10-12 dB by using two-gap input cavity having unequal rf voltages is considered. The efficiency enhancing by using two-frequency operation in output cavity (class F) is simulated numerically. The opportunity of significant decrease of intermodulation products by low frequency predistortion is demonstrated.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115958096","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
Beam transmission in microfabricated terahertz device with asymmetric magnet 非对称磁体微加工太赫兹器件的光束传输
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556411
J. So, M. Sattorov, A. Srivastava, K. Jang, J. Won, G. Park, C. Baik, S. Jun, Jonghyun Kim, S. Chang
{"title":"Beam transmission in microfabricated terahertz device with asymmetric magnet","authors":"J. So, M. Sattorov, A. Srivastava, K. Jang, J. Won, G. Park, C. Baik, S. Jun, Jonghyun Kim, S. Chang","doi":"10.1109/IVELEC.2008.4556411","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556411","url":null,"abstract":"An asymmetric magnet system was designed for 0.1 THz BWO devices due to the asymmetry introduced by coupling waveguide. This magnet system confines the electron beam of 12 kV and 50 mA and maintains its radius, 0.18 mm, along the circuit length.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116885911","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
Effect of electrodes curvature of a cold cathode crossed-field gun on process of secondary-emission multiplication 冷阴极交叉场枪电极曲率对二次发射倍增过程的影响
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556520
G. Churyumov, Y. Starchevskiy
{"title":"Effect of electrodes curvature of a cold cathode crossed-field gun on process of secondary-emission multiplication","authors":"G. Churyumov, Y. Starchevskiy","doi":"10.1109/IVELEC.2008.4556520","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556520","url":null,"abstract":"In this paper the possible paths for growing the impact energy of primary electron are considered. In this paper the simulation of process of secondary emission multiplication for different curvature of the electrodes in the cold secondary emission cathode crossed-field guns is considered.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116726823","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 Frequency Circuit Simulator based on finite element method 基于有限元法的高频电路模拟器
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556345
Li Xu, Zhonghai Yang, Bin Li, Jianqing Li, P. Gao, Xiaofang Zhu, Tao Huang, Q. Hu, Yu-Lu Hu, Junjian Ma, Li Liao, GuoXian He
{"title":"High Frequency Circuit Simulator based on finite element method","authors":"Li Xu, Zhonghai Yang, Bin Li, Jianqing Li, P. Gao, Xiaofang Zhu, Tao Huang, Q. Hu, Yu-Lu Hu, Junjian Ma, Li Liao, GuoXian He","doi":"10.1109/IVELEC.2008.4556345","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556345","url":null,"abstract":"This paper provides the design and realization of high frequency circuit simulator (HFCS) which is based on the finite element method. For vilification, the cold-test characteristics of two actual helical slow wave structures have been calculated and the results were found to be consistent with those of HFSS simulation with same mesh density.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117235103","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
Design of electron guns and focusing structures for THz linear beam tubes 太赫兹线束管电子枪及聚焦结构设计
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556330
M. Read, C. Kory, J. Booske, R. Ives
{"title":"Design of electron guns and focusing structures for THz linear beam tubes","authors":"M. Read, C. Kory, J. Booske, R. Ives","doi":"10.1109/IVELEC.2008.4556330","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556330","url":null,"abstract":"Results are reported for numerical modeling of concepts for non-circular beam formation for near-THz frequency TWTpsilas. Several methods for beam compression were examined, and one method appears promising for producing a 12 kV, 8 mA beam with a cross section 70 times 160 microns, while keeping the cathode loading to about 59 A/cm2. This would be suitable for a 650 GHz TWT. The beam loading is significantly lower than in similar frequency backward wave oscillators (BWO) and should result in much longer cathode lifetimes.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115225846","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 an Ka-Band mode converter ka波段模式转换器的设计
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556539
W. Ruan, Yong Wang, Yao-gen Ding, C. Ruan
{"title":"Design of an Ka-Band mode converter","authors":"W. Ruan, Yong Wang, Yao-gen Ding, C. Ruan","doi":"10.1109/IVELEC.2008.4556539","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556539","url":null,"abstract":"As the RF structure to accomplish mode conversion in the system of pulse compression, the helically corrugated waveguides can operate in the frequency of millimeter wave with high gain and high efficiency. In the design of a high-power, broadband millimeter wave pulse compressor, the mode convert system is an important part. A compressor based on helically rippled waveguide is also described.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125878559","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
Computer optimized design of electron guns 电子枪的计算机优化设计
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556399
R. Ives, T. Bui, M. Read, J. David, A. Attarian, H. Tran
{"title":"Computer optimized design of electron guns","authors":"R. Ives, T. Bui, M. Read, J. David, A. Attarian, H. Tran","doi":"10.1109/IVELEC.2008.4556399","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556399","url":null,"abstract":"Calabazas Creek Research, Inc. (CCR) and North Carolina State University are developing optimization techniques for advanced, 3D, electron guns. Our approach uses advanced solid modeling CAD programs capable of controlling geometrical parameters with design tables manipulated by an optimization control program. Geometrical and parametric changes are simulated using a 3D, finite element, adaptive meshing charged particle program. Results of the beam analysis are analyzed and an optimization routine modifies the parameters to obtain user-defined performance goals. These techniques are applied to a number of gun geometries, and the results are described.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125897438","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: 6
Development of 500 W Ka-band helix-TWT and 200 W Q-Band helix-TWT for communications applications 通信用500w ka波段螺旋行波管和200w q波段螺旋行波管的研制
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556332
C. Chong, R.C. Dawson, J. Forster, R.H. Le Borgne, M. Ramay, R. Stolz, R. Tamashiro
{"title":"Development of 500 W Ka-band helix-TWT and 200 W Q-Band helix-TWT for communications applications","authors":"C. Chong, R.C. Dawson, J. Forster, R.H. Le Borgne, M. Ramay, R. Stolz, R. Tamashiro","doi":"10.1109/IVELEC.2008.4556332","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556332","url":null,"abstract":"L-3 ETI is continuing development of high power mm-wave helix-TWTs for next generation military satellite systems and broadband commercial satellite systems. In 2004 L-3 ETI developed the 8925H and demonstrated its power handling capability of 200 W at Q-Band. In 2006 L-3 ETI developed the model 8926H, a 400 W Ka-Communications-Band helix-TWT, and later increasing itpsilas power handling capability to 500 W, as reported in 2007. During 2007, using L-3 ETI IR&D funding, two more engineering units of the 500 W TWTs were built and tested with the result that the 8926HB model TWT is now ready for production. This paper discusses the latest development efforts and performance testing for the 500 W Ka-Band and 200 W Q-Band TWTs.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126530763","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: 6
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