Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7224006
Dongping Gao, Rui Zhang, Haibing Ding, Ke Tang
Magnetron, as a kind of high-power high-efficiency and low-cost microwave generator, has been widely improved and used since 1930s. For industrial utility, magnetron with CW output power of 75 kW operating in 915 MHz is widely used. Therefore, one type of water load with tolerance of 100 kW is developed for the convenience of high power test. Three type of materials, ceramic, mica, Teflon are considered to be used as microwave window of water load. According to simulation result, its VSWR is optimized to be less than 1.08, 1.25 and 1.5 within a bandwidth of 100 MHz for ceramic, mica and Teflon respectively.
{"title":"Design of 100kW water load for P-band Continuous Wave Magnetron","authors":"Dongping Gao, Rui Zhang, Haibing Ding, Ke Tang","doi":"10.1109/IVEC.2015.7224006","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224006","url":null,"abstract":"Magnetron, as a kind of high-power high-efficiency and low-cost microwave generator, has been widely improved and used since 1930s. For industrial utility, magnetron with CW output power of 75 kW operating in 915 MHz is widely used. Therefore, one type of water load with tolerance of 100 kW is developed for the convenience of high power test. Three type of materials, ceramic, mica, Teflon are considered to be used as microwave window of water load. According to simulation result, its VSWR is optimized to be less than 1.08, 1.25 and 1.5 within a bandwidth of 100 MHz for ceramic, mica and Teflon respectively.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122884363","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223850
Yang Shengmei, Su Wei, Wang Yajun
A novel fundamental mode multi-beam folded waveguide (FMMBFW) circuit, which can enhance the output power and interaction efficiency of terahertz (THz) traveling wave tubes (TWT), is proposed in this paper. Results show that the D-band FMMBFW circuit with three beams can produce 21.78 W peak output power and 6.34 % electronic efficiency at 0.14 THz.
{"title":"Analysis of D-band fundamental mode multi-beam folded waveguide TWT","authors":"Yang Shengmei, Su Wei, Wang Yajun","doi":"10.1109/IVEC.2015.7223850","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223850","url":null,"abstract":"A novel fundamental mode multi-beam folded waveguide (FMMBFW) circuit, which can enhance the output power and interaction efficiency of terahertz (THz) traveling wave tubes (TWT), is proposed in this paper. Results show that the D-band FMMBFW circuit with three beams can produce 21.78 W peak output power and 6.34 % electronic efficiency at 0.14 THz.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123815695","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223906
Xue Ming, Zhang Rui, Ding Yaogen, Wang Yong
This paper reports a numerical simulation for collector of klystron fluid flow and coupled heat transfer. The structure of collector using in the klystron was simplified. A numerical model of the collector was established by using ANSYS Workbench. Fluid velocity distribution, temperature rise and pressure drop condition inside the collector were obtained and analyzed. This research could be beneficial to the optimal design of cooling system in the klystron and other vacuum electron devices.
{"title":"Numerical simulation for the collector of klystron fluid flow and coupled heat transfer","authors":"Xue Ming, Zhang Rui, Ding Yaogen, Wang Yong","doi":"10.1109/IVEC.2015.7223906","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223906","url":null,"abstract":"This paper reports a numerical simulation for collector of klystron fluid flow and coupled heat transfer. The structure of collector using in the klystron was simplified. A numerical model of the collector was established by using ANSYS Workbench. Fluid velocity distribution, temperature rise and pressure drop condition inside the collector were obtained and analyzed. This research could be beneficial to the optimal design of cooling system in the klystron and other vacuum electron devices.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"365 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123948884","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223756
Tyler Rowe, N. Behdad, J. Booske
The resistive wall amplifier (RWA) has been shown to be theoretically capable of very high gains. However, properties of the materials necessary to support the practical resistive medium significantly reduce the effective gain of the device. This work investigates a metamaterial-enhanced RWA. We demonstrate theoretically that the use of metamaterials in RWAs enables very high, near-theoretical gains.
{"title":"Metamaterial-enhanced resistive wall amplifiers","authors":"Tyler Rowe, N. Behdad, J. Booske","doi":"10.1109/IVEC.2015.7223756","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223756","url":null,"abstract":"The resistive wall amplifier (RWA) has been shown to be theoretically capable of very high gains. However, properties of the materials necessary to support the practical resistive medium significantly reduce the effective gain of the device. This work investigates a metamaterial-enhanced RWA. We demonstrate theoretically that the use of metamaterials in RWAs enables very high, near-theoretical gains.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016803","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223844
Jiang Yi, Lei Wenqiang, Hu Linlin, Zhou Quanfeng, Hu Peng, Ma Guowu, Chen Hongbin
The design and simulation results for a 140 GHz gyro-amplifier are presented. A bandwidth of over 3 GHz has been achieved in simulation with peak saturated gain of over 33 dB. Study dispersion characteristic and beam-wave interaction of the confocal waveguide. The HE06 mode of a confocal waveguide is chosen as the operating mode and distributed loss is employed via diffraction to stabilize the circuit.
{"title":"Design of a 140 GHz confocal gyro-TWT amplifier","authors":"Jiang Yi, Lei Wenqiang, Hu Linlin, Zhou Quanfeng, Hu Peng, Ma Guowu, Chen Hongbin","doi":"10.1109/IVEC.2015.7223844","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223844","url":null,"abstract":"The design and simulation results for a 140 GHz gyro-amplifier are presented. A bandwidth of over 3 GHz has been achieved in simulation with peak saturated gain of over 33 dB. Study dispersion characteristic and beam-wave interaction of the confocal waveguide. The HE06 mode of a confocal waveguide is chosen as the operating mode and distributed loss is employed via diffraction to stabilize the circuit.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121919235","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223931
Siyuan Ma, Jirun Luo, Zi-cheng Wang, Tong Feng
A structure for power probe of W-band power meter is designed under the premise of ensuring absorption rate and steady working of materials at high temperature. Basing on heat analysis ANSYS code, the temperature distribution of the probe has been simulated with 0-50mW input power. The designed probe meets the requirements of calibration and measurement according to the simulation results for temperature difference, heat-balance time and heat-withstanding capability of the material.
{"title":"Structural design for power probe of W-band power meter","authors":"Siyuan Ma, Jirun Luo, Zi-cheng Wang, Tong Feng","doi":"10.1109/IVEC.2015.7223931","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223931","url":null,"abstract":"A structure for power probe of W-band power meter is designed under the premise of ensuring absorption rate and steady working of materials at high temperature. Basing on heat analysis ANSYS code, the temperature distribution of the probe has been simulated with 0-50mW input power. The designed probe meets the requirements of calibration and measurement according to the simulation results for temperature difference, heat-balance time and heat-withstanding capability of the material.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122410731","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}
This paper provided a briefly introduction to the features of pulsed YAG laser welding technology in the production of the electron gun for klystron. The theoretical basis of the laser welding for the electron gun has been discussed. Proper welding parameter of laser welding technology is concluded from the experimental research. The reliability of laser welding technology is also tested from the small batch production.
{"title":"Research on the processing technology of the electron gun for klystron using plused laser welding","authors":"Bofeng Wang, Guanli Zhou, Xuhua Hu, Jianyong Zhou, Xiaohua Li, Yongqing Zhang","doi":"10.1109/IVEC.2015.7223935","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223935","url":null,"abstract":"This paper provided a briefly introduction to the features of pulsed YAG laser welding technology in the production of the electron gun for klystron. The theoretical basis of the laser welding for the electron gun has been discussed. Proper welding parameter of laser welding technology is concluded from the experimental research. The reliability of laser welding technology is also tested from the small batch production.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127167401","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7223823
Jiawei Li, Wen-hua Huang, R. Xiao, Yuchuan Zhang, Tiezhu Liang, X. Cui, Xiaoyue Xing, H. Shao, Changhua Chen, Qi Zhu
This paper presents the design of a circular waveguide TM01 mode combiner with high power capacity for phased locked high power devices. Considering the characteristic of the TM01 mode, two high power sources are injected co-axially into a radial waveguide structure with rectangular coupling apertures symmetrically placed on the cylindrical profile of the circular waveguide. The microwaves generated by two phase locked high power devices with the same phase are extracted by magnetic coupling. Then, the extracted microwaves travel through the rectangular waveguides separately, and are combined by the other radial waveguide with shorted wall. Circular cavities along the input waveguides are employed and provide reflections to eliminate the transmitted power from one source to the other and match the combiner. Simulation results show that the TM01 mode combiner at X-band possess GW level power capacity and combination efficiency up to 97%.
{"title":"A compact TM01 mode combiner for phase locked high power devices","authors":"Jiawei Li, Wen-hua Huang, R. Xiao, Yuchuan Zhang, Tiezhu Liang, X. Cui, Xiaoyue Xing, H. Shao, Changhua Chen, Qi Zhu","doi":"10.1109/IVEC.2015.7223823","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223823","url":null,"abstract":"This paper presents the design of a circular waveguide TM01 mode combiner with high power capacity for phased locked high power devices. Considering the characteristic of the TM01 mode, two high power sources are injected co-axially into a radial waveguide structure with rectangular coupling apertures symmetrically placed on the cylindrical profile of the circular waveguide. The microwaves generated by two phase locked high power devices with the same phase are extracted by magnetic coupling. Then, the extracted microwaves travel through the rectangular waveguides separately, and are combined by the other radial waveguide with shorted wall. Circular cavities along the input waveguides are employed and provide reflections to eliminate the transmitted power from one source to the other and match the combiner. Simulation results show that the TM01 mode combiner at X-band possess GW level power capacity and combination efficiency up to 97%.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224473","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}
Pub Date : 2015-04-27DOI: 10.1109/IVEC.2015.7224013
X. Lei, Lingna Yue, Yanyu Wei, Qian Li, Chong Ding, Jin Xu, Y. Gong, Xiaomeng Yang, T. Huang, Yixue Wei, Haihua Gong, Jinjun Feng
A novel and simple helix slow-wave structure (SWS) with low gain fluctuation is present. The high frequency characteristics and beam-wave interaction of this structure are calculated. The simulation results show that the gain of the novel helix traveling wave tube (TWT) is more than 58dB at Ka-band. At the same time, the gain fluctuation of the TWT is less than 6.2dB.
{"title":"A novel helix SWS for wide band TWT with low gain fluctuation","authors":"X. Lei, Lingna Yue, Yanyu Wei, Qian Li, Chong Ding, Jin Xu, Y. Gong, Xiaomeng Yang, T. Huang, Yixue Wei, Haihua Gong, Jinjun Feng","doi":"10.1109/IVEC.2015.7224013","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224013","url":null,"abstract":"A novel and simple helix slow-wave structure (SWS) with low gain fluctuation is present. The high frequency characteristics and beam-wave interaction of this structure are calculated. The simulation results show that the gain of the novel helix traveling wave tube (TWT) is more than 58dB at Ka-band. At the same time, the gain fluctuation of the TWT is less than 6.2dB.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124386919","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}
Frequency agility and tunability is necessary for many applications of high power microwave sources. Frequency characteristics of a distributed feedback resonant traveling wave tube with high efficiency are investigated in this paper. Frequency hopping of the device is achieved by controlling the longitudinal mode competition. The experiments have been carried out and high power microwave with dual-modes output are obtained. When the voltage is about 680 kV, microwave with power of 2.1GW, frequency of 9.3GHz and efficiency of 41% is generated. Meanwhile, microwave with power of 1.2GW, frequency of 10.3GHz and efficiency of 35% is also generated while the voltage is about 580kV.
{"title":"Frequency characteristics of a relativistic traveling wave tube","authors":"Wei Song, Yanchao Shi, Xiaoze Li, Ligang Zhang, W. Tan, Q. Ning, Xu Liang","doi":"10.1109/IVEC.2015.7223977","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223977","url":null,"abstract":"Frequency agility and tunability is necessary for many applications of high power microwave sources. Frequency characteristics of a distributed feedback resonant traveling wave tube with high efficiency are investigated in this paper. Frequency hopping of the device is achieved by controlling the longitudinal mode competition. The experiments have been carried out and high power microwave with dual-modes output are obtained. When the voltage is about 680 kV, microwave with power of 2.1GW, frequency of 9.3GHz and efficiency of 41% is generated. Meanwhile, microwave with power of 1.2GW, frequency of 10.3GHz and efficiency of 35% is also generated while the voltage is about 580kV.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"495 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127585224","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：