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High power, high efficiency 32 GHz space traveling wave tube 大功率、高效率32ghz空间行波管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316305
N. Robbins, H. Limburg, D. R. Dibb, R. Benton, J. Burdette, W. Menninger, X. Zhai
{"title":"High power, high efficiency 32 GHz space traveling wave tube","authors":"N. Robbins, H. Limburg, D. R. Dibb, R. Benton, J. Burdette, W. Menninger, X. Zhai","doi":"10.1109/IVELEC.2004.1316305","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316305","url":null,"abstract":"Boeing Electron Dynamic Devices, Inc. in collaboration with NASA Glenn Research Center, has demonstrated 100 W CW and 60% overall efficiency at 32 GHz in a TWT designed for deep space communications applications. Additionally, the TWT is designed to allow for variable output power levels, from 50 to 150 W, depending on mission requirements. The Boeing 999H is a helix TWT with PPM focusing in a conduction-cooled package. The electron gun is a dual anode, isolated focus electrode design, and is designed for greater than 12 years of mission life. The helix circuit is designed to provide near constant efficiency and gain over the 31.8-32.3 GHz band, while maintaining high linearity performance. Improved beam focusing reduces the thermal load on the helix, and increases the BWO margin. The four- stage, depressed collector has been optimized for flexible power requirements and reduced backstreaming.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"47 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114135905","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
F-programs TWT design upgrades [military aircraft radar] F-programs行波管设计升级[军用飞机雷达]
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316177
C. Ar, A.V. Piring, P. Tibbs
{"title":"F-programs TWT design upgrades [military aircraft radar]","authors":"C. Ar, A.V. Piring, P. Tibbs","doi":"10.1109/IVELEC.2004.1316177","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316177","url":null,"abstract":"In the early 1990s, Boeing began a systematic program of upgrading the designs of its TWT products that support radars for F-14, F-15 and F-18. The objective was to use technology that was not available when these tubes were originally designed to increase the tube's MTBF by an order of magnitude. This improvement would not only provide greater field reliability, but also would greatly reduce tube repair and support costs. The upgrade programs have now been completed for the three F-program designs and are considered to be highly successful. The body currents of the tubes, a key factor in reliability, have been substantially reduced for each design and the power margins have all increased. Finally, the tendency of the tubes to fall out of specification due to \"parameter drift,\" probably the most common cause of tube failures, has been eliminated.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114365270","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
Experimental investigations of folded-waveguide TWT oscillators 折叠波导行波管振荡器的实验研究
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316202
S.T. Han, J. So, K. Jang, Y. Shin, S. Jeon, J.H. Kim, S.S. Chang, N. Ryskin, G. Park
{"title":"Experimental investigations of folded-waveguide TWT oscillators","authors":"S.T. Han, J. So, K. Jang, Y. Shin, S. Jeon, J.H. Kim, S.S. Chang, N. Ryskin, G. Park","doi":"10.1109/IVELEC.2004.1316202","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316202","url":null,"abstract":"Summary form only given. There have been many efforts to generate THz radiation, among them, the folded waveguide traveling-wave tube (FW-TWT), due to its simple structure, has advantages because it has a high power-handling capacity at higher frequencies and is compatible with planar fabrication using MEMS technologies. A scaled-up experiment as a proof of principle was carried out at Ka-band to investigate the performance of the FW-TWT oscillators. We designed and fabricated the folded waveguide circuits for a backward wave oscillator using the second space harmonic and a delayed feedback oscillator adopting the fundamental forward space harmonic. Relatively low values of the electron beam voltage (12 kV) and current (150 mA) were adopted in order to verify the feasibility of compact and inexpensive high power source comparable to solid-state devices.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114912135","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
Controlling chaotic dynamics in a multiple cavity klystron oscillator driven by an external signal 由外部信号驱动的多腔速调管振荡器混沌动力学控制
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316209
B. Dmitriev, D. Klokotov, N. Ryskin, A. M. Shigaev, Y. Zharkov
{"title":"Controlling chaotic dynamics in a multiple cavity klystron oscillator driven by an external signal","authors":"B. Dmitriev, D. Klokotov, N. Ryskin, A. M. Shigaev, Y. Zharkov","doi":"10.1109/IVELEC.2004.1316209","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316209","url":null,"abstract":"Among sources of chaotic microwave radiation, a delayed feedback multiple cavity klystron oscillator is one of the most promising due to high power level and high efficiency. It has been shown that increasing either beam current or feedback level leads at first to self-modulation instability and then to a transition to chaos after a sequence of period doubling bifurcations. In this paper, we present the results of an experimental study of a multiple cavity klystron oscillator driven by an external signal. In the experiment, a medium power S-band five-cavity klystron, with double-gap cavities operating in /spl pi/-mode, was used. It was shown that driving the multiple cavity klystron oscillator with an external harmonic signal provides an efficient control of oscillations and allows one to obtain various regimes: single frequency, multi-frequency or chaotic ones.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"96 4-5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114937008","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
Feedforward and predistortion linearizers on an X-band helix-TWT x波段螺旋行波管的前馈和预失真线性化器
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316258
J. Joo, Min Ho Son, Yong Dug Lee, J. Choi
{"title":"Feedforward and predistortion linearizers on an X-band helix-TWT","authors":"J. Joo, Min Ho Son, Yong Dug Lee, J. Choi","doi":"10.1109/IVELEC.2004.1316258","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316258","url":null,"abstract":"Research on linearizing an X-band helix-TWT is performed. Both feedforward and predistortion linearizing circuits are designed and fabricated. Output frequency spectra are measured to compare the third order intermodulation distortion amplitudes of the TWT with linearization and without linearization. When a two-tone signal of 9.5 GHz and 9.505 GHz is injected with 6 dBm input power, the output power is measured to be 1.2 W and the third-order intermodulation distortion (IMD) is 45.6 dB. The third-order IMD is improved by 25.6 dB, compared with the TWT without the linearizing circuit.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114587053","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
The continuing need for vacuum electronic devices to support electronic warfare 持续需要真空电子设备来支持电子战
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316174
F.J. Klemm
{"title":"The continuing need for vacuum electronic devices to support electronic warfare","authors":"F.J. Klemm","doi":"10.1109/IVELEC.2004.1316174","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316174","url":null,"abstract":"Summary form only given. This paper presents a simple analysis that examines a notional anti-ship cruise missile (ASCM) threat and the requirements to defeat such a missile. It uses a comparative methodology to arrive at \"baseline\" effective radiated power requirements. These requirements are then expressed as relative improvements required for maintaining a jamming capability against future as well as current threats. It includes the implications of varying output powers of amplifiers on array element requirements. It addresses the requirements for operation in the I and J bands as well those needed to defeat threats in the 35 and 94 GHz portions of the spectrum. A relative cost analysis comparing solid state technology and vacuum technology is presented. The analysis shows the need to use vacuum technology in future MMW phase array jammers. Without the availability of high power vacuum amplifiers the system complexity and cost would be prohibitive.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116612306","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
BMS 3D-code for modeling of cold-cathode crossed field guns 用于冷阴极交叉场枪建模的BMS 3d代码
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316290
Y. Starchevskiy, G. Churyumov, A. Dovbnya, O. Lebedev, N. Reshetnyak, V. V. Zakutin
{"title":"BMS 3D-code for modeling of cold-cathode crossed field guns","authors":"Y. Starchevskiy, G. Churyumov, A. Dovbnya, O. Lebedev, N. Reshetnyak, V. V. Zakutin","doi":"10.1109/IVELEC.2004.1316290","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316290","url":null,"abstract":"A great interest has been expressed in the investigations connected with the generation of powerful electron beams in crossed field guns in the past few years. The obtained experimental results point to the fundamental possibility of the forming of electron beams in cold cathode crossed field guns. For understanding the physical processes in the interaction space of the gun, it is necessary to carry out a theoretical investigation of features of the secondary-emission multiplication. In this paper, 3D computer modeling results in the interaction space of cold (metallic) cathode crossed field guns are discussed.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121704524","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
Bandwidth and group delay extension for an X-band 250 kW CW klystron for JPL/NASA deep space radar 用于JPL/NASA深空雷达的x波段250千瓦连续速调管的带宽和群延迟扩展
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316206
A. Mizuhara
{"title":"Bandwidth and group delay extension for an X-band 250 kW CW klystron for JPL/NASA deep space radar","authors":"A. Mizuhara","doi":"10.1109/IVELEC.2004.1316206","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316206","url":null,"abstract":"Summary form only given. This paper describes a bandwidth extension requirement that was made for an operational 250 kW CW klystron which operates in the X-band at 8.560 GHz with a -1 dB 20 MHz band pass. A further requirement was that the group delay of each tube manufactured had to match a given reference response.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122138951","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
Linearizability of traveling-wave tube amplifiers using predistortion techniques 预失真技术对行波管放大器线性化的影响
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316256
J. Qiu, D. Abe, T. Antonsen, B. Danly, B. Levush, R. Myers
{"title":"Linearizability of traveling-wave tube amplifiers using predistortion techniques","authors":"J. Qiu, D. Abe, T. Antonsen, B. Danly, B. Levush, R. Myers","doi":"10.1109/IVELEC.2004.1316256","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316256","url":null,"abstract":"Summary form only given. It is increasingly common, for the designers of TWTA systems, to incorporate linearizers for the power amplifiers to improve their efficiency and linearity. Most of the commercially available linearizers are analog predistortion linearizers utilizing the third order nonlinearity. Fifth order linearizers have been proposed in the literature but have yet to be realized in practice. In this report we address the effectiveness of fifth order linearizers with respect to third order linearizers. Furthermore we present a technique for realizing a fifth order linearizer using two cascaded third order linearizers.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125696295","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
Experimental research of triode with virtual cathode radiation field 虚拟阴极辐射场三极管的实验研究
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316289
A. Zherlitsyn, G. Melnikov, P. Isakov
{"title":"Experimental research of triode with virtual cathode radiation field","authors":"A. Zherlitsyn, G. Melnikov, P. Isakov","doi":"10.1109/IVELEC.2004.1316289","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316289","url":null,"abstract":"The results of experimental research of a triode with virtual cathode (VC) radiation field in the far-zone are given in (A. N. Didenko et al, Proc. of 3rd Int. Top. Conf. on High Power Electron and Ion Beam, v.2, p.683-691,1979). Power flux density and frequency dependences upon radiation direction at different time moments of pulse generation are obtained. It is shown that radiation from the triode with a VC has a radiation pattern of complex shape with a different frequency composition. In this work, the measurements of the power flux density and radiation frequency on the imaginary hemisphere in the radiation far-zone are represented. According to the measurement results, the triode radiation field in space has a complication structure and different frequency composition. This proves its multimode generation character.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125773844","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
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